89results about How to "Does not affect power supply" patented technology

The invention discloses a non-destructive identification method for a material of an integral coil of a distribution transformer. The non-destructive identification method based on the difference of attenuation coefficients of copper, steel and aluminum to X rays includes photographing the distribution transformer in a integral state by the X rays; measuring blackness of photographed negative films of the rays by a black and white densitometer; inputting measured blackness values into a computer; and computing X-ray attenuation coefficient and transillumination thickness curves, which are stored in the computer, of the copper, the steel and the aluminum corresponding to different X-ray tubes and comparing the X-ray attenuation coefficient and transillumination thickness curves with a characteristic curve of the industrial ray films, and judging whether the winding coil of the distribution transformer is made of the aluminum or the copper.

The invention discloses a low-voltage electric energy metering device capable of being assembled and disassembled in electrified state. The device comprises a current mutual inductor, an electric energy meter box and an insulating wire clamp; the current mutual inductor is mounted on a low-voltage phase wire, the low-voltage phase wire passes through a central hole of a current mutual inductor iron core, a secondary winding outgoing line of the current mutual inductor is connected with the electric energy meter, the current mutual inductor is mounted in the electric energy meter box body or an indoor / outdoor low-voltage phase wire; the electric energy meter is directly clamped on the phase wire by the insulating wire clamp to collect voltage data required by the electric energy meter; the electric energy meter box body is mounted on an electric pole or a transformer rack; a three-phase four-wire electric energy meter is mounted in the electric energy meter box. When assembling and disassembling the electric energy metering device for assessing, the operation can be performed in electrified state without influencing the power supply to the user; the low-voltage electric energy metering device provided by the invention can improve the reliability of power supply and increase the enterprise and social benefit.

A kind of car-carried mathanol catalytic cracking device fuel pipe auto-control system automatically controls the second air jet-in device, pre-heat device, oil pump, spray nozzle and electro magnetic valve according to the signal inputted by temperature sensor, pressure sensor and air flowmeter through ECU. Thus, the gas with rich hydrogen from said cracking device is mixed with fuel to inject into the engine as different ratio in different condition and rotate speed, to reduce tail-gas displacement.

The invention provides a self-recovering method of single-phase earth faults, comprising, step 102, detecting if a single-phase earth fault occurs in a distribution system in real time; step 104, determining a circuit of the single-phase earth fault when a single-phase earth fault occurs in the distribution system; step 106, turning off a load-side interconnection switch of the circuit, then, turning on a load-side incoming line switch of the circuit, and finally turning on a main side switch of the circuit. According to the technical scheme of the invention, a single-phase earth fault of a neutral point non-effective grounding system can be automatically and rapidly isolated, and the load cannot break down during the fault isolation.

The invention discloses a fault recording data fusion system based on multiple substations. The system comprises a hardware portion and a software portion. The hardware portion comprises an acquisition server, a recording file storage device, a data server, a master station database and a WEB publishing server. The software portion comprises a storage module and a data processing module. According to the fault recording data fusion system based on the multiple substations, through arrangement of the acquisition server, recorded fault information of each fault wave recording device can be collected effectively; through arrangement of the recording file storage device, an effect of temporary storage of the recorded fault information can be realized; through arrangement of the data server, the recorded fault information can be processed effectively to judge relevance between the recorded fault information, and finally, a failure analysis report can be obtained and stored in the master station database; and the information is issued to the WEB publishing server to inform work personnel of faults.

The invention provides a site test method for feeder automation. The method comprises the following steps that definite value information about protection of an exit in a distribution network line is obtained first; the state of the line is divided into a plurality of cross section states in different sequences according to the feeder automation process, and information in the cross section states is set automatically according to the definite value information and a network topology state; the information of the cross section states is issued to test equipment according to the sequences; the test equipment controls output of electrical data automatically according to received information, and then testing is realized.

The invention discloses a power frequency online anti-icing and de-icing method for a power transmission line, which comprises the steps which are as follows: three sets of dynamic reactive power compensation devices are connected with a power transmission line between a left side electric power substation and a right electric power substation which are adjacent; a temperature sensor is arranged on the power transmission line; when the temperature detected by the temperature sensor is lower than 0 DEG C, a controller controls the three sets of dynamic reactive power compensation devices into an anti-icing and de-icing working state; the reactive power compensation device at the left side generates a capacitive reactive current; the dynamic reactive power compensation device at the right side generates a capacitive reactive current; and the dynamic reactive power compensation device in the middle generates an inductive reactive current. The power frequency online anti-icing and de-icing method for the power transmission line can automatically implement anti-icing and de-icing under the conditions that the line is not stopped and the power supply is not influenced, guarantees the line from icing, guarantees the stability and safety of a power supply system under extreme disaster weather conditions such as freezing rain, ice and snow, and improves the running economical efficiency of the power system.

The invention discloses a self-generating intelligent street lamp with a solar thin film battery in the field of lighting technology, which includes a lamp post, a base, a lighting device, a power generation device, a lightning protection device, and a controller; And the lamp arm perpendicular to the lamp post also includes a lamp body arranged at the end of the lamp arm, a fixing assembly for fixing the lamp body on the lamp arm, and a photosensitive sensor arranged on the lamp body; the power generation device includes a set The horizontal wind power generator at the top of the lamp post also includes flexible solar thin-film batteries; the solar thin-film batteries include a bottom plate made of flexible materials, and also include a photoelectric element layer arranged on the bottom plate; the solar thin-film batteries are respectively adhered to the outside of the lamp post The arc surface, the outer arc surface of the lamp arm, and the top cover surface of the lamp housing. The invention uses solar thin-film cells and horizontal wind generators to jointly generate power, has strong wind resistance and high power generation efficiency, and at the same time, can be automatically turned on and off according to ambient light.

The invention relates to a UPS (uninterrupted power supply) device with low power consumption, which comprises an energy storage unit, an AC-DC conversion circuit, a charging circuit, a selective circuit, a main detecting circuit, a main control circuit and a minor control circuit. As the running of the UPS device is controlled by the main control circuit or the minor control circuit, the UPS device can start and stop the running of the man control circuit or the minor control circuit in good time according to running information (for example, output current) of the UPS device so as to increase the overall efficiency of the UPS device and prolong the power supplying time; moreover, the UPS device can also stop a relatively high-drain controller in good time without affecting the running and power supplying of the UPS device.

The invention discloses a hot-plug assembly and a circuit breaking arrangement. The hot-plug assembly comprises a movable part and a fixed part which are electrically connected through an electrical connector. When a circuit breaker works, a contact pin of the electrical connector located in the movable part is correspondingly connected with a base located in the fixed part, and the fixed part breakovers with the circuit breaker inside the movable part. When the circuit breaker fails and needs maintenance and replacement, the movable part can be pulled out from the fixed part, and the circuitbreaker is electrically disconnected from the fixed part. Compared with fixedly installed circuit breakers, the pluggable structure can provide convenience for the maintenance and replacement of devices. An anti-electric shock protection mechanism of the fixed part isolates a first base inside the fixed part, thus electric shock is effectively avoided when maintenance personnel pull out the movable part under the condition that a system is not powered off, and safe hot plug of the circuit breaker is realized. By adopting the hot-plug assembly, the maintenance and replacement of the circuit breaker can be realized under the condition that the system does not need to disconnect a main circuit breaker, and the power supply of other power supply branches is not affected.

The invention discloses a 10kV distribution network line anti-thunder protection device allowing electrified replacement. The 10kV distribution network line anti-thunder protection device allowing the electrified replacement comprises a guiding supporting plate which is connected with an insulator steel pin, an electrified separator which is connected with the guiding supporting plate, an adjusting plate which is connected with the electrified separator and an anti-thunder protector which is connected with the adjusting plate. The 10kV distribution network line anti-thunder protection device allowing the electrified replacement is formed by the guiding supporting plate, the electrified separator, the adjusting plate and the anti-thunder protector, the electrified separator is pulled to be opened to enable the anti-thunder protector and the guiding supporting plate to be separated, then the anti-thunder protector and the high-voltage insulator steel pin are separated, and electrified maintenance and replacement of the anti-thunder protector is convenient.

The invention discloses an electronic management method and system of a battery. The method comprises the following steps of acquiring a voltage stage of a single battery; determining to execute at least one of the following operation: stimulation operation, optimization operation and balancing operation on the single battery according to the acquired voltage state of the single battery; and outputting a pulse width modulation (PWM) signal to the single battery according to the determined operation. By the method, PCS control and BMS control are combined, so that PCS power partial control and battery system control and application can be effectively combined and coordinated, moreover, the cost can be reduced, the expansibility can be improved, a battery electronic module is easy to connect in series / parallel, and hot plug is facilitated.

The invention discloses a voltage transformer on-line state monitoring and fault diagnosing method and relates to a voltage transformer state monitoring and fault diagnosing method. The method comprises the following steps: voltage transformer winding parameters are calculated via a microprocessor based on first to fourth high frequency discrete signals which are collected synchronously and a voltage transformer winding parameter calculating formula, the calculated voltage transformer winding parameters are output to a storage device, the detection result of all parameters is displayed on different display devices, and a voltage transformer state can be determined by workers and fault diagnosis can be realized according to obtained numeric values of the voltage transformer winding parameters and a fitting curve thereof. According to the voltage transformer on-line state monitoring and fault diagnosing method, actually measured electrical parameters are used for calculating resistance and reactance parameters of a voltage transformer winding in real time, and the method is based on a simple principle and can be realized conveniently.

The invention relates to the technical field of energy systems, and discloses a distributive battery pack power supplying system. The distributive battery pack power supplying system comprises N firstpower batteries are connected to a first high-voltage box; N driving controllers corresponding to the high-voltage box are powered by the first high-voltage box; N second power batteries are connected to a second high-voltage box, and N driving controller corresponding to the second high-voltage box are powered by the second high-voltage box; the N first power batteries are in one-to-one-correspondence to the N driving controllers, and the N first power batteries separately directly power the corresponding driving controllers; he N second power batteries are in one-to-one-correspondence to the N driving controllers, and the N second power batteries separately directly power the corresponding driving controllers; the N first power batteries and the N second power batteries are connected toa CAN bus through a battery management system; and the driving controllers are connected to the CAN bus. By adopting the power supplying arrangement mode, reliability of the power supplying system inan energy car is improved; repairing is convenient and flexible; and the space utilization rate is great.

The invention relates to a UPS online hot spare backup switching device and method for realizing independent power supply and complete power off. A switching device is connected to a host computer UPS1 and a standby computer UPS2 through a line; the switching device comprises a switching circuit, a load circuit and a bypass power supply system outside the load; the host computer UPS2 and the standby computer UPS2 are powered by a higher level power supply system; the output terminal of the standby computer UPS2 is connected to a static bypass input terminal of the host computer UPS1 through two switching switches; the switching circuit is connected between a power supply circuit and a load circuit of the host computer UPS1 and is intersected with a connection circuit of the host computer UPS1 and the standby computer UPS2; switching switches are respectively arranged in front of and behind an intersection point; the switching is only allowed when the two UPSs are in a bypass output state; and when the two UPSs are in inverter output or one UPS is in the inverter output and the other one is in bypass output, the switching is not allowed. The UPS online hot spare backup switching device and method require less investment, can perform reasonable switching in the premise of improving stability and reliability of the UPS output power supply, provide regular maintenance to the UPS, and provide a solution to a fact that the power supply to the load device is not affected during outrage failure of one or two UPS devices.

The invention relates to an outdoor high-voltage electrified installation and removal electric energy metering device which comprises a current transformer, a voltage transformer and an electric energy meter box, wherein the current transformer is mounted on a high-voltage phase line, a high-voltage one-phase line penetrates through the middle hole of an iron core of the current transformer, and an outlet wire of a secondary winding of the current transformer is connected with an electric energy meter; the voltage transformer is mounted in the electric energy meter box or on an electric pole, the two outlet wire ends of a primary winding of the voltage transformer are connected with high-voltage two-phase lines, and the two outlet wire ends of the secondary winding of the voltage transformer are connected with the electric energy meter; and an electric energy meter box body is mounted on the electric pole or a transformer trestle, and the three-phase electric energy meter is mounted in the electric energy meter box. By applying the outdoor high-voltage 10kV electrified installation and removal electric energy metering device, the problem of frequent power failure caused by installation and removal of the electric energy metering device for checking can be avoided, when the electric energy metering device is installed or removed, the operation can be performed in an electrified manner without affecting the power supply for users, and the application of the outdoor high-voltage electrified installation and removal electric energy metering device can be used for improving the reliability in power supply and increasing the enterprise and social benefits.

The invention discloses a current sharing control system and method. The system and method are used for controlling output currents of at least two sets of power sources which are connected in parallel. The current sharing control system comprises multiple sampling modules, multiple controllers and a processor, wherein each sampling module is connected with the corresponding power source and samples the corresponding power source to obtain the current output current, each controller is connected with the corresponding power source so as to control the output current of the corresponding power source, and the processor is connected with the sampling modules and the controllers and sends control signals to the controllers according to the remaining capacity of each power source so that the output currents of all the power sources can be controlled through the controllers, and therefore the output currents of all the power sources are in direct proportion to the remaining capacities. In this way, the output currents of the parallel power sources can be adjusted in real time, the remaining capacities of all the power sources can be zero at the same time, when some power sources are damaged, the power supply of other power sources can not be affected, the stability of a power supply system with the parallel power sources can be improved, and the service life of the power supply system with the parallel power sources can be prolonged.

The invention provides a power distribution network's low voltage fault detection instrument and detection method. The system consists mainly of a power supply part and a detection part. The power supply part uses a storage battery as its power supply; and the power is converted by an inverter into alternating current to be outputted. The detection part comprises converting the 220V voltage outputted from the power supply part into two shifts through a conversion bipolar switch before being outputted as 220V output of voltage shift and output of current shift. The method comprises: first, determining the type of a fault; determining whether there exists a fault or not through the exertion of voltage on a line and the feedback information from the line; in case of the generation of the maximum value of instant current if there exists a short circuit on the detected line, or rather the detected line impedance stands at zero, determining that fault exists on the line and that further detection is required; under the premise that the fault is determined, exerting a current value with certain magnitude onto the detected line continuously; using a clip type ammeter to search the flow direction and position of current; and utilizing the isolation function of an air switch to accurately spot the section of the line with the fault; and isolating and recovering the section of line with the fault.

The invention discloses an AC monitoring method and a system based on a battery electronic module. The system comprises a harmonic detection module, a single battery inner resistance calculation module, a data processing module and a harmonic injection module, wherein the harmonic detection module is used for detecting a harmonic signal in the battery electronic module, the frequency of the harmonic signal is m times that of the power grid, and m is an integer larger than 1; the single battery inner resistance calculation module is used for calculating the single battery inner resistance according to the detected harmonic signal and a single battery model; the data processing module is used for calculating the state of charge of the single battery according to the detected harmonic signal and the single battery inner resistance; and the harmonic injection module is used for outputting a harmonic signal for controlling the battery electronic module to complete conversion between DC and AC according to an instruction of the data processing module. The battery performance measurement cost can be reduced, the battery performance measurement precision is improved and the battery-side quick measurement is realized.

The invention provides a replacement tool for an arc-shaped damper. The replacement tool for the arc-shaped damper comprises a body and a fixed column. The fixed column is located on the body. Lug supports are arranged at the two ends of the fixed column. The lug supports are located on the body. Due to the facts that the fixed column is embedded into a hole of the arc-shaped damper, and the lug supports on the left side and the right side of the fixed column are inserted into holes of the arc-shaped damper, the replacement tool is more tightly buckled with the arc-shaped damper, the arc-shaped damper is conveniently pulled out and assembled, and the aim of replacing the arc-shaped damper under the electrification state is achieved. The replacement tool for the arc-shaped damper is simple in structure and safe and convenient to use, working efficiency is improved, the arc-shaped damper can be rapidly and safely replaced under the electrification state, and continuous supplying of electric power is ensured.

The invention discloses an uninterruptible assembled / disassembled mobile distribution transformer. The distribution transformer, a low voltage distribution box and a wood pole are arranged on a flat car. A high voltage fuse and a high voltage lightning arrester are arranged on the wood pole. The upper end of the high voltage fuse is installed on a high voltage phase line through a high voltage lead and an installing line clamp while the lower end of the high voltage fuse is connected with the upper end of the high voltage lightning arrester and the upper end of a high voltage sleeve of the distribution transformer. The lower end of the high voltage lightning arrester is connected with a grounding device. The upper end of a general switch in the low voltage distribution box is connected with the upper end of a low voltage sleeve of the distribution transformer, and the lower end of the general switch in the low voltage distribution box is connected with each branch switch which is used for being connected with electric equipment. The bottoms of the distribution transformer and the low voltage distribution box are respectively grounded through the grounding device. The distribution transformer can be drawn to field for installation and application along a 10-35kV line requiring power, and can be drawn back to a storeroom to be stored when not used, so that the power demand for agricultural irrigation is guaranteed.

The invention discloses a cable theft alarm system. The cable theft alarm system comprises a cable and an alarm circuit, wherein a plurality of main cable cores, ground wire cable cores and a conductive layer wrapping the main cable cores and the ground wire cable cores are arranged in the cable, the ground wire cable core at a load end of the cable is in short connection with the conductive layer, the ground wire cable core at a power source end of the cable is a first wiring point, and the conductive layer at the power source end of the cable is a second wiring point. The alarm circuit comprises a power source switch, an alarm, a control switch for controlling the work state of the alarm and a driver for driving the control switch to be on and off according to the on-off condition between the ground wire cable cores and the conductive layer after short connection, wherein one end of the power source switch is connected with a mains supply fire wire, the other end of the power source switch is connected with the first wiring point, the second wiring point is connected with the driver, the driver is connected with a mains supply null wire, the other end of the power source switch is connected with one end of the alarm, the other end of the alarm is connected with the control switch, and the other end of the control switch is connected with the mains supply null wire.

The invention discloses a branch wire clamp capable of being separated quickly, which comprises a wire clamp unit, the wire clamp unit comprises a support and a sliding frame connected with the support, the support comprises a connecting piece, a first snap ring connected with one end of the connecting piece and a fixed seat connected with the other end of the connecting piece, and a through holeis formed in the fixed seat; a separation unit which comprises a sliding rod located in the through hole and an annular piece connected with the sliding rod, wherein the sliding rod penetrates throughthe through hole; and a telescopic unit which comprises a rotating piece rotationally connected with the sliding frame and a stud connected to one end of the rotating piece, wherein a screw hole is formed in one end of the sliding rod, and the stud is connected with the screw hole. When power-off operation is needed, the branch wire clamp can be rapidly loosened, the separation effect is achieved, the arranged telescopic unit can be adjusted according to the thickness of a wire, and the device can be connected more firmly.

The invention provides a single-arm type bird repellent shielding cover applied to a high-voltage overhead line pole, and the single-arm type bird repellent shielding cover belongs to the field of line protection. The single-arm type bird repellent shielding cover is provided with a T-shaped middle shielding cover is arranged at a joint part of a lead wire and an insulator string; two opening endsalong the direction of the lead wire of the T-shaped middle shielding cover are provided with a left gun head cover and a right gun head cover separately; and the T-shaped middle shielding cover is integrally fixed / connected between the left gun head cover and the right gun head cover in an inserting or riveting manner. Through arranging the defensive shielding protection cover at the joint partof the overhead power transmission line conductor and the horizontal insulator string, a metal bowl at the tail end of an insulating arm and the bared conductor part are insulated and shielded, insulating extension at a specified length is performed along the direction of an overhead line, an electrical insulation distance between a bird nest and a power supply overhead line is increased, and effective isolation between the bird nest and an electric conductor is generated, so as to avoid a grounding failure of a high-voltage power supply line caused by bird nesting. The single-arm type bird repellent shielding cover applied to the high-voltage overhead line pole can be widely applied to the protection field of various kinds of high-voltage overhead power transmission lines adopting transverse insulator strings.

The invention relates to a self-adaption mains supply control device for an X-ray machine and belongs to the technical field of medical apparatus and instruments. The self-adaption mains supply control device for the X-ray machine is structurally characterized by consisting of a network power supply detection unit, a tube current sampling unit, a mode selection unit, a current control unit and an exposure time control unit. The self-adaption mains supply control device for the X-ray machine has the technical points that the change conditions of a network power supply and tube current are automatically acquired when exposure is performed by using the network power supply detection unit and the tube current sampling unit; the sampled voltage of the network power supply and the sampled current are judged by the mode selection unit, and the tube current and the exposure time are controlled by selecting a corresponding work mode. The self-adaption mains supply control device for the X-ray machine has the advantages that the network power supply meets the requirement of the normal operation of a machine through controlling the output power of the network power supply so as to meet the high-voltage requirement; the requirement of the dosage of rays are met through time control. The self-adaption mains supply control device for the X-ray machine has a very obvious effect especially in occasions of high-power photography and low stability of the network power supply.

The invention discloses a railway power system capable of suppressing harmonic waves and belongs to the technical field of railway power. The railway power system capable of suppressing harmonic waves comprises a superior power source, a distribution substation power source cabinet, and a continuous power transmission line connected with the distribution substation power source cabinet, wherein a harmonic suppression device is arranged between the superior power source and a distribution substation, the harmonic suppression device comprises an electric reactor L, a resistor R, a breaker QF, an isolating switch QS1, an isolating switch QS2 and an isolating switch QS3, and the electric reactor L is connected with the resistor R in parallel; the superior power source is connected with the breaker QF, the breaker QF is connected with a connecting point at the end, connected with the resistor R in parallel, of the electric reactor L, a connecting point of the other end, not connected with the resistor R in parallel, of the electric reactor L is connected with a lower port end B, and the lower port end B of the harmonic suppression device is connected with the distribution substation power source cabinet. According to the railway power system capable of suppressing harmonic waves, damage, caused by harmonic waves of the superior power source, to electric equipment of the distribution substation in the railway power system is avoided, and it is guaranteed that the power system can stably operate when the distribution substation operates in various modes and the continuous power transmission line is in various states.

The invention provides an intelligent anti-icing deicing system and method for a high-voltage transmission line. The intelligent anti-icing deicing system comprises an alternating-current up-conversion module, an alternating-current down-converting module, an ice coating detection device, a frequency measurement meter, an up-conversion control module and an alternating-current down-conversion control module, wherein the alternating-current up-conversion module is arranged at the front end of an ice-coated circuit, the alternating-current down-converting module us arranged at the back end of ice-coated circuit, the ice coating detection device is arranged on the ice-coated circuit, the frequency measurement meter is arranged at the output end of the down-conversion module, the up-conversion control module is used for receiving a signal sent by the ice coating detection device and controlling the up-conversion module, and the alternating-current down-conversion control module is used for receiving a signal sent by the frequency measurement meter and controlling the alternating-current down-conversion module. In the invention, alternating-direct current is converted into high-frequency alternating current by utilizing the skin effect, so that the ice-coated circuit generates more heat; anti-icing and deicing is carried out through the heat generated by the ice-coated circuit;and deicing frequency is selected in intelligent grade according to change of meteorological conditions, without affecting power transmission and supply, so as to settle circuit ice coating with minimal energy consumption, and thus not only anti-icing but also deicing can be achieved. The intelligent anti-icing deicing system has simple structure and strong implementation, and can be widely applied tohigh-voltage transmission lines in areas with frequent snow disasters.

The invention belongs to the field of monitoring technologies and particularly relates to an arrester on-line monitoring system. The arrester on-line monitoring system comprises an arrester unit, a voltage and current on-line detection unit, a main control unit and a wireless emitter unit. The arrester unit is connected with the voltage and current on-line detection unit which is connected with the main control unit. The main control unit is connected with the wireless emitter unit. Current and voltage signals in the arrester unit are detected out through a current sensor and a voltage sensor, the signals are compared with a reference source phase difference through a comparison amplifier, comparative data are transmitted to the main control module and then transmitted through an antenna in the wireless emitter unit, and remote data transmission is realized, so that defects inside the arrester are effectively detected in time, and maintainers on duty realize remote maintenance without looking for phase line earth points. The maintenance time is largely shortened, the maintenance efficiency is improved, power supplied to users is not effected, power supply reliability is greatly improved, and the equipment damage rate is reduced.