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643 results about "Traction substation" patented technology
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A traction substation, traction current converter plant or traction power substation (TPSS) is an electrical substation that converts electric power from the form provided by the electrical power industry for public utility service to an appropriate voltage, current type and frequency to supply railways, trams (streetcars) or trolleybuses with traction current.
Traction substation watchkeeper virtual immersion type training simulation system and method
InactiveCN106095105AFlexible training methodsImprove immersionInput/output for user-computer interactionCosmonautic condition simulationsTraining periodDaily operation
The invention discloses a traction substation watchkeeper virtual immersion type training simulation system and method. Virtual three-dimensional scenes and related animations of a traction substation are established with three-dimensional modeling and animation software, the visual and auditory senses of training objects can be effectively enhanced, and the understanding of the training objects on study content can be intensified; the three training patterns of free exercising, situational teaching and simulation checking, and specific task training content are established with a three-dimensional engine and a database, and the training content is high in pertinence and capable of being freely modified; the scene perceptual feelings are further enhanced through virtual reality immersion type helmets and somatosensory interaction equipment. According to the method, the three-dimensional scene of the whole traction substation can be vividly and visually established through three-dimensional visualization simulation, the daily operation of patrolling, switching, overhauling and the like is simulated through service training content based on the three-dimensional scene, safe operation, a high immersion degree, high visualizability and a short training period are achieved in the training process, and good application prospects are achieved.
Owner:SOUTHWEST JIAOTONG UNIV
Urban rail train regenerative brake energy absorbing and using system and method
ActiveCN103311950AFast absorptionFully absorbedElectrodynamic brake systemsSingle network parallel feeding arrangementsLow voltageAlternating current
The invention provides an urban rail train regenerative brake energy absorbing and using system. The system comprises an energy feedback inverter, an energy-storing unit, a DC / DC (direct-current / direct-current) bidirectional converter and a direct-current flat-wave capacitor, wherein the direct-current side of the energy feedback inverter and the high-voltage side of the DC / DC bidirectional converter are connected in parallel with the direct-current flat-wave capacitor and are simultaneously connected in parallel with the anode and the cathode of a direct-current bus; the low-voltage side of the DC / DC bidirectional converter is connected with the energy-storing unit; and the alternating-current side of the energy feedback inverter is connected with the low-voltage side of a distribution transformer in a traction substation, and the energy feedback inverter is used for inverting regenerative brake energy on the direct-current bus to be used by electric equipment in the traction substation. The invention also provides a regenerative brake energy absorbing and using method based on the system. The energy feedback inverter and the DC / DC bidirectional converter are coordinated and controlled on the basis of the change status of the voltage of the direct-current bus, the train regenerative brake energy is quickly and fully absorbed, the voltage of the direct-current bus is kept stable, and the utilization rate of the train regenerative brake energy is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Electrified railway traction power supply and energy storage device and method thereof
ActiveCN103840477AImprove energy utilizationRealize energy savingPower supply linesAc network load balancingTraction transformerPeak load
The invention discloses an electrified railway traction power supply and energy storage device and a method of the electrified railway traction power supply and energy storage device. The energy storage device is connected between a feeding arm alpha or feeding arm beta at the output end of a traction transformer and a steel rail, or two energy storage devices are connected between the feeding arm alpha and the steel rail and between the feeding arm beta and the steel rail respectively, wherein the energy storage device is arranged in a traction substation. The energy storage device comprises a control unit, an isolation transformer, a PWM current transformer, an energy transformation circuit and an energy storage element, wherein the PWM current transformer, the energy transformation circuit and the energy storage element are connected in sequence, and the control unit is used for carrying out calculation according to the voltage, current and direction of the feeding arm alpha and / or feeding arm beta to complete control over the PWM current transformer and the energy transformation circuit and achieve energy exchange between the energy storage device and the feeding section connected with the energy storage device. The electrified railway traction power supply and energy storage device can fully recycle locomotive braking feedback electric energy, improve the energy utilization ratio of a traction power supply system, reduce the installation billing capacity of the traction transformer, reduce cost and absorb and store energy even in electricity valleys, has the effect of peak load shifting and further has the functions of dynamic reactive-power compensation and low-order harmonic suppression.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Multiple-target integrated control energy-saving method of electric power supply system for subway
InactiveCN101376344AImplement regenerative brakingReduce consumptionElectrodynamic brake systemsPower supply linesAbsorbed energyElectric power
A multi-object comprehensive control energy conservation method of a subway power supply system fully recovers and utilizes the braking energy, and overcomes the shock to the electric network caused by the energy fed back instantaneously through part of the absorbed energy and the feedback energy. When energy is required for starting or accelerating the train within the power supply section, two parts of circuits are comprehensively controlled to release the excessive electric energy with the aim of maintaining the basic electric energy storage of the independent condenser banks. During the running process of the trains, the advanced algorithm is adopted for reasonable energy distribution, thereby achieving the purpose of the optimal performance of the entire system, improving the utilization factor of the recovered energy and enhancing the energy conservation effect. The control system further detects the harmonic wave and the reactive component of other non-traction load of the traction substation, triggers an AC / DC converter module to compensate for the harmonic wave and the reactive component of the part, and avoids the pollution of the electric network so as to further reduce the loss caused by the harmonic wave and realize the control of the multi-object comprehensive energy conservation.
Owner:SOUTHEAST UNIV
Section power supply and status measurement and control method of parallel-connected traction networks at tail end of double track railway
ActiveCN102963271AImprove reliabilityHigh selectivityPower supply linesFault locationElectricityContact line
The invention discloses a section power supply and status measurement and control method of parallel-connected traction networks at the tail end of a double track railway. By taking the section (10km) of the railway as a unit, a contact line sectioning and a sub-section post are additionally arranged at a section boundary. The sub-section post comprises a circuit breaker, a current transformer, a voltage transformer and a measurement and control unit. The circuit breaker and the current transformer connected with the circuit breaker in series are in bridge connection with the two ends of the contact line sectioning, and the sectioning is series-connected in the contact line. Through the arrangement of the sectioning and the sub-section post and the introduction of running status criterion, the running situation of charging trains on the traction networks can be timely and accurately mastered by operators on duty in a traction substation or dispatching room; by using the fault criterion, various faults can be timely and accurately found, distinguished and isolated, the continuous power supply and running of fault-free sections are ensured, the power outage scope is reduced to the maximum extent, and further the reliability of power supply of the traction networks is improved. The device has less investment and is easy to implement, not only is conveniently used by a new line, but also facilitates the transformation of an existing line.
Owner:SOUTHWEST JIAOTONG UNIV +1
Electric locomotive non-power-off neutral section passing-electric energy quality comprehensive compensation device and method
ActiveCN102035212APrevent surgeNo currentPolyphase network asymmetry elimination/reductionReactive power adjustment/elimination/compensationCapacitancePower quality
The invention relates to an electric locomotive non-power-off neutral section passing-electric energy quality comprehensive compensation device and method, which belongs to the technical field of railway transport equipment and electric electronics. The device comprises a controllable transfer switch, a single-phase step down transformer, a single-phase step down transformer with a middle tap, a two-phase back-to-back converter sharing a DC-side capacitor, a circuit breaker switch, four position sensors and three electric quantity sensors. In the method, when the electric locomotive passes the neutral section, the controllable transfer switch is turned off, and the device works in a non-power-off neutral section passing mode to perform control on amplitude and phase of the neutral section voltage and enable the electric locomotive to pass the neutral section with load in a non-power-off manner. Without locomotive passing, the controllable transfer switch is closed, and the device works in an electric energy quality comprehensive compensation mode and has functions of active power transfer as well as inactive power and harmonic compensation. Through the device, the problems relating to electric energy quality of a traction substation and neutral section can be comprehensively solved based on the traditional traction power supply mode.
Owner:TSINGHUA UNIV +1
Direct current traction power supply system and protective method
ActiveCN103311910ARealize localizationAvoid serious consequences of breaking failureEmergency protective circuit arrangementsDc circuit breakerTraction power supply
The invention discloses a direct current traction power supply system and a protective method, and utilizes direct current protective device outlet information and a short circuit fault mark value as a criterion to judge various direct current short circuit faults. When the short fault occurs, an alternating current incoming line breaker closest to a fault element is subjected to brake separating; if the sum of the fault mark values of the element, measured and computed after the brake separating, is more than or equal to 1, permanent fault is determined, the alternating current incoming line breakers of other traction substations in the whole line are subjected to brake separating, and related direct current isolation switches are subjected to brake separating to enable the alternating current incoming line breakers of the traction substation in the whole line to be subjected to switching on, so the power supply of the system can be restored; and if the sum of the fault mark values of the element is smaller than 1, the fault is instant, and related breakers are switched on for restoring the power supply of the system. The direct current traction power supply system and the protective method are capable of omitting the direct current breakers and saving investment, convenient to implement, suitable for carrying out new line construction or old line transformation in occasions where the lines are not very long (for example in 20m and less than 10 traction substations). When the line is overlong, the traction power supply system can be subjected to partition by a small amount of direct current breakers.
Owner:SOUTHWEST JIAOTONG UNIV +1
Electric energy regulation device and method for electrified railways
ActiveCN103840450AImprove energy utilizationReduce installed capacitySingle network parallel feeding arrangementsAc network load balancingPeak load shavingTraction transformer
The invention discloses an electric energy regulation device and method for electrified railways. The electric energy regulation device is in bridging connection between two power supply arms of a traction transformer. The electric energy regulation device comprises isolation transformers, single-phase back-to-back PWM converters, an energy conversion circuit, an energy storage element and a control unit. The control unit carries out calculation according to voltages, currents and directions of the power supply arms alpha and beta and completes control over the PWM converters and the energy conversion circuit. Consequently, energy conversion between the power supply arms alpha and beta and the energy conversion between the energy storage element and the power supply arm alpha or the power supply arm beta can be achieved. The electric energy regulation device is capable of fully recycling and utilizing braking feedback electric energy of a locomotive through transfer, storage and release of the electric energy, improves the energy utilization rate of a tractive power supply system, reduces the installation billing capacity of a traction transformer, can deal with the negative sequence, idle work and harmonic waves of a traction substation, avoids traction force losses and speed losses, caused by electric phase separation, of a train and can also have the effects of peak load shaving and voltage stabilization and can be used as an emergency power supply.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
United electric energy quality controller based on series multiplex of transformer and chain type construction
ActiveCN101453171AIncrease production capacityEasy maintenanceAc-dc conversion without reversalTransformers/inductances coils/windings/connectionsElectric power systemEngineering
The invention relates to a unified power energy quality controller based on the serial-connection multiplicity of transformers and a chain structure, which belongs to the technical filed of flexible AC transmission and distribution of an electric power system and the power electronic. The unified power quality controller comprises a single-phase serial-connection multiple transformer bank and a single-phase chain H bridge converter, wherein the transformer bank consists of m single-phase transformers which form the serial-connection multiple transformer bank together with n voltage source converters connected with n secondary windings of m single-phase transformers respectively; the single-phase chain H bridge converter is provided with n chains and is formed by connecting n DC voltage supporting units and n power source converters, and an AC port of the n-chain single-phase chain H bridge converter is directly connected with the electric fence through a reactor, m and n are signless integrals equal to or more than 2, and m is less than or equal to n. The invention can realize accurate current control, has high dynamic responding speed, and can solve the problems of the traction substation of an electrified railway that the three-phase voltage is unstable and fluctuates, the power factor is low and the harmonic pollution exists, and the like.
Owner:TSINGHUA UNIV
Hybrid parallel active power filter for electrified railway system
InactiveUS20050083627A1Add significant costImprove filtering resultInterference suppressionActive power filteringGrid impedanceControl manner
An exemplary parallel hybrid power filter apparatus for the electrified railway is described. The apparatus may include a group of LC reactive filter being purely tuned, an additional inductance, an active power filter and a coupling transformer. The active power filter may be controlled, e.g., as a current source in a composite control manner and can be connected in parallel to the additional inductance via the coupling transformer. The power filter can be connected to the reactive filter in series to form the parallel hybrid filtering system, and may be connected to the power grid via the circuit breaker or a thyristor. This exemplary system can be installed either in the traction substations or in the locomotives directly, or performed by ameliorating the original reactive filter. The active power filter does not add significant amount of cost, and may be simple and reliable in a control manner for the capacity of the APF is so small as to be less than one percent of that of the harmonics source. The power filter can also inhibit the impact of the “background harmonics” of the electrified railway on the reactive filter, and prevent the reactive filter and the grid impedance from resonance.
Owner:XI AN JIAOTONG UNIV
New energy-based hybrid bidirectional interactive direct-current traction power supply system
InactiveCN103434421AImprove power supply reliabilitySmall fluctuationBatteries circuit arrangementsPower supply linesLow voltageNew energy
A new energy-based hybrid bidirectional interactive direct-current traction power supply system is provided with two traction substations, and each traction substation comprises transformers, rectifiers, bidirectional alternating current-direct current (AC-DC) converters, a direct-current bus, a contact system, rails and a section post. A direct-current new energy system which comprises an electric automobile charging and discharging system, a distributed power supply and more than one low-voltage direct-current micro-grid is arranged on the direct-current bus between the two neighboring traction substations, and is connected with the direct-current buses of the two neighboring traction substations through a high-voltage direct-current bus, so that a direct-current loop micro-grid is formed in a power supply section, wherein the electric automobile charging and discharging system comprises more than one bidirectional direct current-direct current charger-discharger which is used for connection with the power cells of electric automobiles. The new energy-based hybrid bidirectional interactive direct-current traction power supply system realizes the effective utilization of distributed new energy and the recovery of the braking energy of electric locomotives; the fluctuation of the voltage of the direct-current bus is reduced, and thereby the reliability of the power supply of the direct-current traction power supply system is enhanced.
Owner:NORTH CHINA ELECTRIC POWER UNIV +2
High-voltage direct-current tractive power supply system of bidirectional interactive electrified railway
InactiveCN103448573ACharge and discharge realizedSmall fluctuationPower supply linesDc source parallel operationMicrogridNew energy
A high-voltage direct-current tractive power supply system of a bidirectional interactive electrified railway is provided with a plurality of traction substations. Each traction substation is provided with first transformers connected onto an alternating-current bus and a plurality of second transformers connected onto the alternating-current bus, each first transformer is connected with a high-voltage rectifier or a first high-voltage bidirectional alternating current-direct current converter, each second transformer is connected with a second high-voltage bidirectional alternating current-direct current converter, the high-voltage rectifiers or the first high-voltage bidirectional alternating current-direct current converters and the second high-voltage bidirectional alternating current-direct current converters are connected onto a high-voltage direct-current bus of the corresponding traction substation, each high-voltage direct-current bus is connected with an electric locomotive through a catenary and a steel rail, a section post connected with the corresponding high-voltage direct-current bus is arranged on the catenary of each traction substation, and a direct-current new energy system composed of an electromobile charging and discharging system, a distributed power supply and a plurality of low-voltage direct-current microgrids is arranged on the high-voltage direct-current bus between every two adjacent traction substations. Power supply reliability of the high-voltage direct-current tractive power supply system is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
Electric split-phase non-interruption flexible connection-compensation device and method for traction electric network
ActiveCN102126438ARealize switchingCost-effectiveReactive power adjustment/elimination/compensationReactive power compensationHarmonic pollutionEngineering
The invention relates to an electric split-phase non-interruption flexible connection-compensation device and method for a traction electric network, belonging to the technical fields of railway transportation equipment and electric power and electronics. The device comprises a two-phase back-to-back converter set and three position sensors, wherein the two-phase back-to-back converter set comprises two single-phase converter sets Va and Vb sharing a DC side capacitor set, and two single-phase reduction transformer sets Ta and Tb respectively connected with AC sides of the two single-phase converter sets Va and Vb, or a single-phase reduction transformer set Ta or Tb connected with the AC side of the single-phase converter set Va or Vb, and also comprises three electric quantity sensors, a killer switch, a controllable fling-cut switch and a main controller. The device can work in two modes, and realizes that an electric locomotive passes through split phases without interruption and with loads. The device has functions of active power transfer, reaction power compensation and harmonic compensation, and can solve the problems of three-phase voltage imbalance, voltage fluctuation, low power factor, harmonic pollution and the like in a traction substation.
Owner:TSINGHUA UNIV +1
Visualized simulation training system and method for electrified railway traction substation
ActiveCN105139714AEasy to understandHelp to acceptCosmonautic condition simulationsElectrical appliancesThree dimensional simulationTraining period
The invention discloses a visualized simulation training system and method for an electrified railway traction substation. Three-dimensional simulation modeling software, animation production software and assistant software are utilized to establish a three-dimensional visualized simulation training system, which can effectively activate a plurality of sensory organs of visual sense and auditory sense and the like of training objects to participate in the perception activity, helps to understand and receive the training content, allows students to autonomously select learning content and difficulty level, provides a favorable condition for giving a full play to the initiative and obtaining effective cognition for the training objects, is high in versatility, short in training period, friendly in interactive interface and high in substitution, and has a good application prospect.
Owner:NARI TECH CO LTD +1
Method and a system for monitoring and regulating the power consumed by a transport system
ActiveUS20030230994A1Optimize operating costReducing quality of service renderedBatteries circuit arrangementsDC motor speed/torque controlTransport systemTransit system
A method of monitoring and regulating the power and the energy consumed by a transport system including electrically propelled vehicles, said transport system including a power supply system including one or more power supply substations connected to an external electrical power supply network, said power supply substation or substations supplying energy to traction substations supplying power to power supply line sections having vehicle-mounted current pick-up means connected thereto, each vehicle carrying a power converter which is supplied with power by said current pick-up means and which monitors the power supplied to a traction motor of said vehicle, which method includes the following steps: measuring the instantaneous electrical power and / or energy drawn from the external electrical power supply network by said power supply substation or substations, and if the power or energy drawn from the external network tends to exceed an assigned threshold, sending one or more vehicles a set point acting on the converter on board said vehicle to reduce temporarily the power and / or the speed of rotation of the traction motor.
Owner:ALSTOM TRANSPORT TECH SAS
High-speed railway electric energy quality and traction network voltage comprehensive compensation system
ActiveCN103928928ACompensation for load harmonic currentReduce negative sequence shockAc network voltage adjustmentReactive power compensationPower qualityTerminal voltage
The invention provides a high-speed railway electric energy quality and traction network voltage comprehensive compensation system. The comprehensive compensation system comprises a single-phase back-to-back STATCOM installed on the traction side of a traction substation and thyristor switched high-pass filters installed in section posts. The single-phase back-to-back STATCOM is used for negative sequence compensation, lower-order harmonic filtration within the range of 2-11 order and power factor and traction network bus voltage control. The thyristor switched high-pass filters are used for absorbing high-order harmonic with the order of 11 or above and stabilizing the traction network terminal voltage. The single-phase back-to-back STATCOM can detect the power factor of the traction substation in real time, carry out dynamic stepless regulation on reactive output and maintain the power factor of the system to be 0.9 or above. The thyristor switched high-pass filters arranged in the section posts are used for absorbing harmonic currents with the order of 11 or above and improving the traction network voltage. The whole high-speed railway electric energy quality and traction network voltage comprehensive compensation system has the advantages of being small in occupies area, low in operation loss, low in construction cost, high in reliability, simple in technology implementation, prominent in comprehensive benefit and the like.
Owner:STATE GRID CORP OF CHINA +1
Earthquake emergency processing method and system for high speed railway
ActiveCN103754241AImprove timelinessImprove reliabilityRailway traffic control systemsEmergency treatmentControl system
The invention relates to an earthquake emergency processing method and system for a high speed railway. The method comprises the steps that a railway administration central system receives earthquake alarming information, determines the earthquake alarming information and then releases the earthquake alarming information; an earthquake monitoring pre-alarming station receives the released earthquake alarming information and then controls a traction substation overhead line system in a corresponding area to cut off power; a vehicle-mounted emergency processing device receives the released earthquake alarming information and then controls a train to brake emergently at necessary time according to the earthquake alarming information and the detected overhead line system power off state; a train operation control system receives the released earthquake alarming information, and then controls the operation mode of the train and conducts modulation control to forbid other trains to enter earthquake areas according to the alarming grade of the earthquake alarming information. Through the earthquake emergency processing method and system, the reliability and the timeliness of earthquake emergency treatment are effectively improved.
Owner:CHINA RAILWAYS CORPORATION +3
Traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices
ActiveCN109659980AReduce electricity costsThe energy management optimization method is close to realitySingle network parallel feeding arrangementsEnergy storageLoad following power plantTraction substation
The invention discloses a traction power supply system energy management optimization method integrating hybrid energy storage and photovoltaic devices. The traction power supply system energy management optimization method comprises the steps of: step 1, acquiring traction substation load process data and a typical light intensity scene; step 2, establishing an objective function of an optimization model; step 3, establishing constraint conditions of the optimization model, and linearizing the constraint conditions of optimization model; step 4, establishing a hybrid integer linear programming model according to the objective function obtained in the step 2 and the constraint conditions obtained in the step 3; step 5, and solving the hybrid integer linear programming model obtained in thestep 4, so as to obtain the optimal charge and discharge power of the hybrid energy storage device, the optimal photovoltaic grid-connected power and the optimal power flow power of a back-to-back converter in a power flow controller, thereby completing the energy management optimization of a traction power supply system. The traction power supply system energy management optimization method improves the photovoltaic permeability and train regenerative braking energy utilization rate, reduces the electricity cost of electrified railways, and is closer to the reality.
Owner:SOUTHWEST JIAOTONG UNIV
Electrified railroad homo-phase traction power supply system
ActiveCN101746283AMeet the voltage withstand capabilityGuaranteed safe operationPower supply linesConversion without intermediate conversion to dcCapacitanceBeta phase
The invention discloses an electrified railroad homo-phase traction power supply system. A traction transformer (SS1) of a traction substation is a three-phase-two-phase transformer; three phases (A, B and C) of the primary side of the traction transformer (SS1) are connected with a public power grid; a voltage reduction transformer (G), a first single-phase current transformer (M1), a direct-current capacitor (C) and a second single-phase current transformer (M2) are connected between an alpha output phase and a beta output phase of the secondary side in turn; the alpha phase supplies power to a locomotive (L), and the output voltage of the alpha phase is 27.5kV; and the output voltage of the beta phase is between 600 and 2,000V. The system can implement two-arm homo-phase power supply of the railroad traction substation without split phase, reduces the split phase link, is favorable for high-speed, stable and safe operation of the railroad, and has the advantages of simple structure, low cost and convenient implementation.
Owner:SOUTHWEST JIAOTONG UNIV +1
Medium-voltage flexible direct current tractive power supply system and controlling method thereof
ActiveCN107953803ATake advantage ofPromote green and sustainable developmentBatteries circuit arrangementsWind energy with electric storagePower qualityEngineering
The invention discloses a medium-voltage flexible direct current tractive power supply system and a controlling method thereof. The tractive power supply system comprises more than one traction powersubstation. The traction power substation comprises a three-phase step-down transformer, a three-phase electric reactor, a voltage source current converter and a first direct current bus which are connected successively. The input end of the three-phase step-down transformer is connected to a three-phase power grid. The positive pole and the negative pole of the output end of the voltage source current converter are connected to the positive pole and the negative pole of the first direct current bus. The positive pole and the negative pole of the first direct current bus are connected to a contact system and a steel rail. The beneficial effects of the medium-voltage flexible direct current tractive power supply system are that the electric energy quality of the system can be greatly improved, the electric phase splitting link is completely eliminated, and the through power supply of the whole traction network is realized. In addition, the system is capable of increasing the power supply distance of the single traction substation, and realizing the renewable energy sources along the railway and the effective utilization of the locomotive regenerative braking energy.
Owner:SOUTHWEST JIAOTONG UNIV
Data collection synchronous method of electrical railway distance measurement device
InactiveCN102508113ATime synchronizationHigh precisionFault locationData synchronizationData acquisition
The invention discloses a data collection synchronous method of an electrical railway distance measurement device, which is characterized in that: synchronous data collection is realized through special optical fibers, a distance measurement device of a traction substation is adopted as a main machine, a distance measurement device of AT transformer station and a sectioning station is adopted as an auxiliary machine, and all distance measurement devices are connected with one another through one optical fiber; the length of an optical fiber channel is estimated through the inputted parameter of a distance between every two AT transformer stations, data transmission delay between the devices of the AT transformer stations or between the devices of the AT transformer station and the sectioning station is further calculated according to the length of the optical fiber and the optical speed, a sampling interruption interval time of the auxiliary machines is instantly adjusted according to the calculated fixed data transmission delay, the desynchronizing influence caused by errors such as clock crystal oscillation can be eliminated, and the sampling interruption between the main machine and the auxiliary machine as well as between the auxiliary machine and the auxiliary machine is maintained relatively synchronous.
Owner:NR ELECTRIC CO LTD +1
Computer interlock and traction power supplying simulation control system
InactiveCN101118701AShow basic compositionShow how it worksTeaching apparatusEngineeringContact line
The present invention relates to a computer analog control system with interlocking and traction power supply, and has a station simulated sand table, a signal computer interlocking system and a traction power supply system. A track circuit, a signal controller and a switch machine are controlled by an interlocking control operating machine and a lower computer; the power supply of a traction substation, a switching station and a contact line equipment are controlled by a traction power supply control operating machine and the lower computer, and the information of power supply is displayed on a power supply display screen. The use of a relay circuit is completely canceled by the computer analog control system with interlocking and traction power supply, the logical operation of computer is entirely carried out, thus achieving the various requirements of railway signals such as the interlocking of station signal, the interval automatic block, the displaying of grade crossing signal and so on, the present invention has convenient operation, good safety and high reliability; the function of trunk line electrification power supply and the remote control are successfully simulated.
Owner:CHINA RAILWAY FIRST GRP CO LTD
Segmenting power supply distributed protection system for electrified railway traction network
ActiveCN104325896AImprove reliabilityHigh selectivityElectric devicesEmergency protective circuit arrangementsProtection systemSecondary side
The invention discloses a segmenting power supply distributed protection system for an electrified railway traction network. An overhead line in the electrified railway traction network is divided into a plurality of sections by corresponding to the intervals of a railway, sectionalizers and switching stations are additionally arranged on segmentation positions; each switching station comprises a breaker, a current transformer, a voltage transformer and a measurement and control unit; the breaker is always under a switching-on state; the secondary side of the voltage transformer and the secondary side of the current transformer of the switching station, the secondary side of the current transformer of the left adjacent switching station and the secondary side of the current transformer of the right adjacent switching station are connected with the input end of each measurement and control unit; the output end of each measurement and control unit is connected with the control end of the breaker of each switching station; each measurement and control unit is connected with a traction substation or control center via a transmission network. The invention forms a segmenting distributed protection method for the traction network. Compared with a centralized protection method, the segmenting distributed protection method has the characteristics that the instantaneity is not affected by the segmentation amount of the traction network. The relevant device disclosed by the invention has the advantages of small investment, convenience in implementation and convenience in new line adoption and old line modification.
Owner:SOUTHWEST JIAOTONG UNIV
Overheat fault diagnosis and early warning system and method for electrical equipment of traction substation of electrified railway
InactiveCN102607643AEliminate temperature changesSolve the difficulty of online real-time detectionMeasurement devicesLine sensorCurrent sensor
The invention discloses an overheat fault diagnosis and early warning system and an overheat fault diagnosis and early warning method for electrical equipment of a traction substation of an electrified railway. The fault diagnosis and early warning system comprises wireless sensors, concentrators, a computer and the like, wherein the wireless sensors comprise wireless temperature sensors, wireless temperature and humidity sensors and wireless current sensors, and measure the temperature of the electrical equipment, the temperature and humidity of an environment and the current of a transmission line respectively; the concentrators receive monitoring point data from each wireless sensor in the whole traction substation, and upload the received data to the computer; and the computer finishes the acquisition and storage of the monitoring data, and finishes intelligent diagnosis and early warning for an overheat fault of the electrical equipment according to the acquired data. By the system, a scientific basis can be provided for the running and overhauling of the traction substation of the electrified railway to ensure the power supply security of the railway.
Owner:XI AN JIAOTONG UNIV
Alternating current electrified railway in-phase continous power supply system based on multi-port direct current transmission
ActiveCN104410095ASmall amount of workLess investmentElectric power transfer ac networkDc source parallel operationContact networkLow voltage
The invention discloses an alternating current electrified railway in-phase continous power supply system based on multi-port direct current transmission. The system comprises more than one three-phase high-voltage alternating current power supply, direct current converters used for converting three-phase high-voltage alternating current into high-voltage direct current, a high-voltage direct current transmission loop used for transmitting the high-voltage direct current to a loop of each traction transformer, alternating current converters used for converting the high-voltage direct current into low-voltage single-phase alternating current, and a contact network system connected with an output end of the alternating current converter, wherein the contact network system is divided into an alternating current bus and a return line which takes power by a locomotive and then flows back from a steel rail. The system has the advantages that the system is simple in structure principle, high in safety and reliability, and easy to realize and popularize.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Method and a system for monitoring and regulating the power consumed by a transport system
ActiveUS7397149B2Reducing quality of service renderedCost optimizationBatteries circuit arrangementsDC motor speed/torque controlTransport systemOn board
Owner:ALSTOM TRANSPORT TECH SAS
Method for improving fault range finding precision of CRH (China Railway High-speed) maintenance and management traction substation
ActiveCN108152669AImprove accuracyImprove fault location accuracyFault locationFault coverageShort-circuit test
Owner:CHINA RAILWAY ELECTRIFICATION BUREAU GRP5TH ENG
AT traction network short circuit fault distance measurement method
The invention provides an AT traction network short circuit fault distance measurement method. The method comprises the steps: A, a current sensor is arranged on each auxiliary?connection line CPWn between a protection line and a steel rail; in the case of short circuit, a central controlling and processing unit acquires at once current In of all auxiliary?connection lines measured by the current sensors, the largest auxiliary?connection line current Ik and the second largest auxiliary?connection line current Ik' are found out, k'=k+ / -1, and the central controlling and processing unit determines the section between the auxiliary?connection line CPWk and the CPWk' to be the section where a short circuit fault happens; B, the distance X between the short circuit fault position and the auxiliary?connection line CPWk where the largest auxiliary?connection line current Ik is located is found out, in the formula shown in the description, D is the distance between the auxiliary?connection line CPWk and the CPWk'; and finally the distance between the fault and the traction substation can be obtained. According to the method provided by the invention, the traction network short circuit fault position in high speed railway full parallel AT power supply?mode can be quickly and accurately measured, timely maintenance is facilitated, and loss expansion and accident happening can be more effectively avoided.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP +1
Traction power supply system of electrified railway novel AT power supply mode applying 2 multiplied by 27.5kV outdoor modular appliance
ActiveCN101537802AMeet safety distance requirementsSmall footprintPower supply linesDistribution substationsModularityTraction power supply
Owner:CHINA RAILWAY SHANGHAI DESIGN INST GRP
Power-frequency online anti-icing de-icing method for electrified railway contact network
ActiveCN102195260AEnsure safetyImprove reliabilityOverhead installationPower supply linesContact networkExtreme weather
The invention provides a power-frequency online anti-icing de-icing method for an electrified railway contact network. The method comprises the steps as follows: A, the head end and the tail end of any power-supply arm of an electrified railway traction substation are respectively connected with a head-end dynamic reactive compensation device and a tail-end dynamic reactive compensation device; and a temperature sensor is arranged on a contact network and connected with a controller of the head-end dynamic reactive compensation device and the tail-end dynamic reactive compensation device; and B, the temperature sensor monitors the temperature of the contact network, and when the detected temperature is lower than 0 DEG C, the controller controls the head-end and the tail-end dynamic reactive compensation devices to enter into an anti-icing de-icing working state and specific current is generated on a contact net for anti-icing and de-icing. The method is used to carry out automatic online anti-icing and de-icing under the condition that the railway is in a continuous running state and the power supply is not influenced, so that the contact network is not frozen in freezing rain, ice and snow and extreme weathers, thereby ensuring the safety of train operation.
Owner:SOUTHWEST JIAOTONG UNIV +1
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