39results about How to "Improve power continuity" patented technology

An intelligent reclosure breaker comprises an operating mechanism, a current and electric leakage detection module, a power module, a voltage detection module, an electric reclosure mechanism, a control unit and a signal interaction module, wherein the voltage detection module is connected to the incoming line side of a main circuit and the rear end of a contact device; the signal interaction module is connected with the control unit and used for signal data interaction. According to an automatic reclosure control method, users can set which voltage faults need tripping and which instantaneous voltage faults allow automatic reclosure through the signal interaction module; the control unit carries out automatic judgment and controls whether the operating mechanism carries out tripping or not according to current signals and voltage signals input by the detection modules and threshold value parameters preset by the signal interaction module. After instantaneous voltage or current faults cause tripping, the control unit carries out automatic judgment to determine whether the faults are allowed to be recovered or not according to the voltage signals collected by the voltage detection module after the breaker trips and the threshold value parameters preset by the signal interaction module, and controls the electric reclosure mechanism whether to carry out electric reclosure or not.

The invention discloses a current monitoring device which comprises a first current bar main current bearing copper bar and a Hall sensor arranged on the first current bar main current bearing copper bar. The current monitoring device further comprises a second current bar arranged on the outer surface of the first current bar. The Hall sensor detects current which passes through the second current bar. The current monitoring device can measure the current accurately, at the same time lower cost and keep high stability.

The present invention discloses a distribution automation cabinet including a cabinet body and a plurality of drawer type cabinets. The cabinet body movably connects with the drawer type cabinets, and the drawer type cabinets are arranged in the cabinet body. The distribution automation cabinet is provided with a plurality of functional modules, and the functional modules are assembled in the distribution automation cabinet in a drawer manner for forming drawer unit modules. Compared with the prior art, the distribution automation cabinet provided by the present invention can be used as a standardized product for production, and various functional module equipment in the distribution automation cabinet can also be used as standardized products for production so as to match with any one ring network cabinet group provided by the prior art or available in the market. And the distribution automation cabinet significantly solves a security problem of outdoor opening and closing existed in the prior art, simultaneously, enhances supply electricity continuity of an outdoor opening and closing place, facilitates the development and management of smart power grids of our country, and therefore, the distribution automation cabinet has a wide application prospect.

The invention discloses a power distribution automation cabinet. The power distribution automation cabinet is composed of a cabinet body and a plurality of unit modules. Each unit module is movably connected with the cabinet body in a pulling-out manner and can be internally arranged in the cabinet body. Each unit module is provided with a plurality of secondary elements with different functions. The power distribution automation cabinet comprises a first power distribution cabinet and a second power distribution cabinet. The first power distribution cabinet is composed of a plurality of single-loop control protection unit modules. The second power distribution cabinet comprises a wiring terminal module, a DTU protection integration unit module, an ONU communication integration unit module and a power supply unit module. The first power distribution cabinet and the power distribution cabinet are electrically connected through the wiring terminal module. Compared with the prior art, the power distribution automation cabinet can be produced as a standard product, all function module equipment of the power distribution automation cabinet can also be produced and designed as standard products, and the power distribution automation cabinet can be matched with any kind of ring network cabinet group for usage; in addition, the safety problems of an outdoor switching station are solved, and the power supply continuity of the outdoor switching station is simultaneously improved.

The invention discloses an automatic detection system for power failure. The system comprises at least two three-phase lines arranged in parallel, a plurality of fault acquisition units, a plurality of fault detection devices and a plurality of fault isolation devices, wherein a neutral point of each three-phase line is provided with a first electrical signal acquisition unit, an input end parallel line of the two three-phase lines is provided with a second electrical signal acquisition unit, an output end parallel line of the two three-phase lines is provided with a third electrical signal acquisition unit; the plurality of fault detection devices comprise a plurality of electrical contact ends insulatedly arranged, the plurality of fault isolation devices are arranged on the upper surface center of the fault detection devices, each fault isolation device comprises a second driving mechanism, a first end of a driving shaft of each second driving mechanism is telescopicly provided witha pair of conductive connecting arms, the lower end of each conductive connecting arm is provided with a first conductive contact head, and each first conductive contact head is selectively connectedwith an electrical contact end. The automatic detection system for power failure guarantees the normal operation of power transmission networks after power transmission lines break down.

The invention discloses a distribution automation cabinet. The distribution automation cabinet comprises a cabinet body and a plurality of drawer type cabinets, the cabinet body is movably connected with the drawer type cabinets, the drawer type cabinets are positioned in the cabinet body, the distribution automation cabinet is provided with a plurality of function modules, and the function modules are assembled in the distribution automation cabinet in a drawer manner to form drawer unit modules. Compared with the prior art, according to the distribution automation cabinet, the distribution automation cabinet can be produced as standardized products, and the function module devices in the distribution automation cabinet can be produced and designed as standardized products so that the distribution automation cabinet can be employed with the cooperation of any ring main unit provided in the prior art or sold in the market; the problem of the security of the outdoor switching station in the prior art is substantially solved; besides, the power supply continuity of the outdoor switching station can be improved, the development and management of the national smart grid can be facilitated, and the application prospect is very wide.

The invention discloses a distribution automation cabinet, which comprises a cabinet body and a plurality of unit modules, wherein each unit module is movably connected to the cabinet body in a drawing-out mode and can be arranged in the cabinet body, and each unit module is provided with a plurality of secondary elements with different functions; the distribution automation cabinet comprises a first power distribution cabinet and a second power distribution cabinet, the first power distribution cabinet is formed by a plurality of single-loop control protection unit modules, and the second power distribution cabinet comprises a wiring terminal module, a DTU protection comprehensive unit module, an ONU communication comprehensive unit module and a power supply unit module, wherein the firstpower distribution cabinet and the second power distribution cabinet are electrically connected through the wiring terminal module. Compared with the prior art, the distribution automation cabinet provided by the invention can be used as a standard product for production, each functional module device of the distribution automation cabinet can also be used as a standardized product for productiondesign, and the distribution automation cabinet can be matched with any ring network cabinet group for use; the safety problem existing in outdoor opening and closing is solved, and the power supplycontinuity of outdoor opening and closing is improved.

The invention relates to a multi-generator ship intermediate voltage electric power system protection method and device. The method comprises the steps that a busbar of a ship intermediate voltage electric power system is connected with a grounding transformer which is connected with a resonance grounding device, each generator neutral point in the ship intermediate voltage electric power system is connected with a high-resistance grounding device, and the resistance value of the high-resistance grounding device is determined according to a multi-tapping mode. The high-resistance grounding device and the resonance grounding device are connected in parallel, so that protection is effectively provided for an intermediate voltage generator and the electric power system, and meanwhile the mixed grounding mode can be effectively used in the complex working conditions such as multi-generator parallel separation.

The invention relates to the field of power electronization power system and discloses an overcurrent protection method of a direct current converter. The method comprises the steps of setting a direct current converter output current instantaneous protection value according to a design margin in an element selection process, making overload and fault current limiting index requirements of the direct current converter by a system to be clear, determining a voltage-current characteristic of direct current converter steady-state output, fitting a mathematical relationship between power and a maintenance time, and forming protection scheme according to the normal, overload, fault current limiting and instantaneous overcurrent working conditions. According to the overcurrent protection method of the direct current converter, the requirements of system selective protection is fully considered, with the coordination with other protection elements of the system or a device, the complete overcurrent protection function of the direct current converter in the normal, overload, fault current limiting and instantaneous overcurrent working conditions is realized, and the power supply continuity of an power electronization power distribution network is improved.

The invention relates to an anti-condensation device for an urban distribution network cabinet, and a working method thereof, belonging to the technical field of power distribution equipment. The anti-condensation device for the urban distribution network cabinet comprises a device body; at least one condensation channel is arranged in the device body; a push rod is arranged in the channel; a push head is arranged at one end of the push rod; the other end of the push rod is connected with a motor; a semiconductor refrigeration thermoelectric slice is arranged outside the cavity of the condensation channel; the refrigeration surface of the semiconductor refrigeration thermoelectric slice is connected with the surface of the cavity of the condensation channel; and the semiconductor refrigeration thermoelectric slice is connected with an external power supply. After the semiconductor refrigeration thermoelectric slice is electrified, the temperature of the surface of the cavity of the condensation channel near the refrigeration surface is reduced; according to the principle that wet hot air can be condensed while being cooled, at this time, wet hot air in an environment can form condensed dews on the inner wall of the condensation channel; the motor drives the push rod to drive the push head to collect the condensed dews; wet hot air is condensed into water and discharged out of a cabinet; therefore, the relative environment humidity is reduced; and the interior of an electric cabinet is really kept dry.

The invention relates to the field of exploration equipment, in particular to a fixing device for multi-terrain-adaptive type exploration equipment. The fixing device comprises a horizontal supportinginstallation plate. A swing installation plate is arranged under the supporting installation plate. A lifting installation plate is horizontally arranged over the supporting installation plate. A lifting installation hole vertically runs through the middle of the lifting installation plate. A storage battery is embedded in the middle of the swing installation plate. A rotary installation cylinderis vertically arranged at the lower end of the supporting installation plate. A limiting bearing bush is vertically arranged in the middle of the lower end of the rotary installation cylinder. A limiting rotary shaft is arranged in cooperation with the limiting bearing bush. Through guide lifting clamping and fixing and hydraulic lifting adjusting, the fixing device can provide efficient and accurate height adjustment for the exploration equipment installed on the fixing device; through gear transmission, steering adjusting is realized; meanwhile, in cooperation with coupling power supply, the power supply continuity of the device is remarkably improved; and by means of a plurality of telescopic structures, the fixing device can adapt to most complicated scenes and is high in practicability.

The invention relates to a low-tension cable temperature pre-warning system. The pre-warning system is characterized in that: the pre-warning system comprises a plurality of wireless temperature collecting modules, wireless signal receiving modules and a pre-warning processing module; signal double-way connection is set between the wireless temperature collecting modules and the wireless signal receiving modules, as well as between the wireless signal receiving modules and the pre-warning processing module; each of the wireless temperature collecting modules comprises a battery, a temperature sensor, a single chip microcomputer, a radio frequency device and a transmitting antenna; the temperature sensors, the single chip microcomputers and the radio frequency devices are connected to the batteries; the output end of each temperature sensor is connected to the input end of a corresponding single chip microcomputer; the output end of each single chip microcomputer is connected to the input end of a corresponding radio frequency device; and the output end of the radio frequency device is connected to the corresponding transmitting antenna. The pre-warning system can perform on-line real-time monitoring for critical nodes and segments of low-tension cables, can subject hot spots capable of causing accidents to early period detection and diagnosis and take corresponding management measures. The pre-warning system effectively improves power supply continuity and reduces the maintenance cost for manpower inspection tour.

The invention discloses a method for replacing a main transformer of a power system. The method comprises the following steps of carrying out the main transformer assembly, lubrication and high-voltage test on a novel main transformer without powering off the prior main transformer; wholly moving the prior main transformer out along a withdrawal route after power off; and after the novel main transformer is wholly moved on the position, measuring a DC resistance of an operational tap of the novel main transformer, and realizing the corresponding connection of wire boards of high, middle and low casings with high, middle and low lead wires in the novel main transformer to complete the replacement of the main transformer. Compared with the prior art, the method has the advantages of reasonable process, high operating efficiency, quite short power-off operation time, high power supply continuity, stable operation of the system and obvious economic benefit.

The present invention discloses a ship shore power system with fault diagnosis and alarm functions. The system comprises: three phase circuits, wherein at least two of the three phase circuits are arranged in parallel, a neutral point of the three phase circuits is provided with a first electrical signal collection unit, a parallel line of input ends of two of the three phase circuits is providedwith a second electrical signal collection unit, a parallel line of output ends of two of the three phase circuits is provided with a third electrical signal collection unit; a plurality of fault collection units; a fault detection device comprising a plurality of electrical contact terminals arranged in an insulation mode, wherein one angular displacement ball gate ruler is at least arranged at aspace at the inner side of each electrical contact terminal, selection detection units are respectively rotationally arranged at two ends of each angular displacement ball gate ruler, the selection detection units are restrictedly rotated on the angular displacement ball gate rulers, and the bottom portion of each selection detection unit is provided with one reading head rotationally sleeving each angular displacement ball gate ruler; and a fault analysis unit and a location analysis unit. The technical problem is solved that a shore power system cannot rapidly determine and locate faults.

The invention discloses a method for replacing a main transformer of a power system. The method comprises the following steps of carrying out the main transformer assembly, lubrication and high-voltage test on a novel main transformer without powering off the prior main transformer; wholly moving the prior main transformer out along a withdrawal route after power off; and after the novel main transformer is wholly moved on the position, measuring a DC resistance of an operational tap of the novel main transformer, and realizing the corresponding connection of wire boards of high, middle and low casings with high, middle and low lead wires in the novel main transformer to complete the replacement of the main transformer. Compared with the prior art, the method has the advantages of reasonable process, high operating efficiency, quite short power-off operation time, high power supply continuity, stable operation of the system and obvious economic benefit.

The invention discloses an intelligent simulation distribution box. According to the intelligent simulation distribution box, a vertical fixed plate is arranged inside a box body, an intelligent distribution transform terminal unit and a capacitor unit are arranged on the upper row of the front side of the fixed plate side by side, a wire inlet / outlet unit is arranged on the lower low of the front side of the fixed plate, a metering and measuring unit is arranged on the back side of the fixed plate, a wire inlet is formed in the side wall of the box body, the wire inlet / outlet unit comprises a molded case circuit breaker, a junction box, a voltage terminal, a current terminal, a wiring terminal, a miniature circuit breaker, a temperature relay and a hurl-slices switch, the metering and measuring unit comprises an intelligent ammeter, a metering current transformer, a monitoring current transformer, a first capacitor current transformer, a second capacitor current transformer and a residual current action protector, the intelligent distribution transform terminal unit comprises an intelligent distribution transform terminal, a power indicator light and a cooling fan, and the capacitor unit comprises a self-healing power capacitor and a capacitor indicator light. The intelligent simulation distribution box has the advantages that the outage frequency is low, and power supply continuity is high.

The invention discloses a thermal power plant 0 class load power supply system and control method. The system comprises an energy storage device, an AC uninterrupted power load low-voltage power distribution device, an AC security load low-voltage power distribution device, and a DC security load DC power distribution device. The AC uninterrupted power load low-voltage power distribution device, the AC security load low-voltage power distribution device and the DC security load DC power distribution device are internally provided with an AC uninterrupted power load bus, an AC security load busand a DC security load bus respectively. The energy storage device is connected to the AC uninterrupted power load bus, the AC security load bus and the DC security load bus through a first switch, asecond switch and a third switch. The AC uninterrupted power load bus is also connected to a first power supply for a thermal power plant power through a fourth switch, and the AC security load bus is also connected to a second power supply for the thermal power plant power through a fifth switch. The system is intensively streamlined, compared with a conventional method, fully static equipment improves the reliability of a 0 class load power supply of the thermal power plant, the power supply quality is improved, and pollutant emissions are reduced.

The present invention discloses a power distribution automation cabinet which comprises a cabinet body and a plurality of drawer type cabinets. The cabinet body is movably connected to the plurality of drawer type cabinets, and the drawer type cabinets are in the cabinet body. In addition, the power distribution automation cabinet also provided with a heat radiation component and a heat recovery system. The heat radiation component is arranged at the outer wall of the power distribution automation cabinet and does not communicate with the internal part of each cabinet. The heat recovery system comprises a rectangular box which is provided with an intake port, an air outlet, a heat exchanger and a storage battery. Compared with the prior art, the power distribution automation cabinet provided by the invention can individually supply the lighting system in the power distribution automation cabinet, the power distribution automation cabinet can be produced as a standard product, each function module equipment in the power distribution automation cabinet can be produced and designed as a standard product, thus the power distribution automation cabinet can be used with any ring main unit provided by the prior art or sold in the market, and thus the application prospect is very board.

A direct-current power supply parallel control system comprises a host power supply, a sub-machine power supply and power supply remote control equipment. The input end of a first isolation diode is connected with the host power supply. The input end of a second isolation diode is connected with the sub-machine power supply. The output end of the second isolation diode is connected with the output end of the first isolation diode and is connected with a load at the same time. The host power supply and the sub-machine power supply both comprise remote control input circuits, remote control parallel circuits and power supply modules. The remote control input circuits are connected with the remote control parallel circuits and the power supply modules. The power supply remote control equipment is connected with the remote control input circuit of the host power supply. The remote control parallel circuit of the host power supply is connected with the remote control parallel circuit of the sub-machine power supply and is used for transmitting remote control signals to the sub-machine power supply. The voltage of the host power supply is higher than the voltage of the sub-machine power supply, and the voltage difference value is equal to the threshold voltages of the first isolation diode and the second isolation diode.

The invention relates to a short-circuit current suppression device based on a phase-change resistor, the device comprises the phase-change resistor connected in series on a distribution line, the phase-change resistor comprises a phase-change layer and an electrode, and the electrode is connected with a pulse signal, and the device has the advantages that the phase-change resistor is connected in series on the distribution line and comprises the phase-change layer, the phase change layer is easy to realize conversion from a crystalline state to an amorphous state, so that the resistance of the phase change resistor is changed, the current of the distribution line is changed, the short-circuit level of the distribution line can be effectively reduced, the damage of the heat effect and the electrodynamic effect of short-circuit current to distribution equipment is reduced; the requirement on the breaking capacity of a circuit breaker can be reduced, the voltage sag degree caused by a short-circuit fault can be reduced before a fault loop of the circuit breaker is cut off, the power utilization continuity of a sensitive load is improved, and economic loss brought to a user is reduced.

A direct-current power supply parallel control system comprises a host power supply, a sub-machine power supply and power supply remote control equipment. The input end of a first isolation diode is connected with the host power supply. The input end of a second isolation diode is connected with the sub-machine power supply. The output end of the second isolation diode is connected with the output end of the first isolation diode and is connected with a load at the same time. The host power supply and the sub-machine power supply both comprise remote control input circuits, remote control parallel circuits and power supply modules. The remote control input circuits are connected with the remote control parallel circuits and the power supply modules. The power supply remote control equipment is connected with the remote control input circuit of the host power supply. The remote control parallel circuit of the host power supply is connected with the remote control parallel circuit of the sub-machine power supply and is used for transmitting remote control signals to the sub-machine power supply. The voltage of the host power supply is higher than the voltage of the sub-machine power supply, and the voltage difference value is equal to the threshold voltages of the first isolation diode and the second isolation diode.

The invention discloses a smart scanning and protecting system for a circuit failure. The system comprises two or more three-phase circuits arranged in parallel, multiple failure collecting units, multiple failure detection devices and one or more failure isolation devices. A first electrical signal collecting unit is arranged on a neutral point of the three-phase circuits, a second electrical signal collecting unit is arranged on the parallel line of the input ends of the two three-phase circuits, and a third electrical signal collecting unit is arranged on the parallel line of the output ends of the two three-phase circuits. An electric-conduction connecting arm is arranged on each failure isolation device, and electric-conduction connecting plugs are arranged at the two ends of each electric-conduction connecting arm respectively and make selective and conductive contact with the electric connection ends of the two ends of a failure source. The smart scanning and protecting system automatically positions and cuts off the failure source, and provides guarantees for safe operation of the circuits.

The invention discloses a dry-type transformer on-load capacity-regulating transition device and a capacity-regulating transformer, relates to the technical field of transformer capacity regulation, and solves the technical problems that the capacity-regulating transformer cannot provide power supply continuity in the voltage regulating process and cannot be suitable for places with high power supply reliability requirements. The dry-type transformer on-load capacity-regulating transition device comprises a high-voltage side switch, a low-voltage side switch, a transition transformer and a power mechanism, the high-voltage side switch is connected with the high-voltage winding of the transition transformer; the low-voltage side switch is connected with the low-voltage winding of the transition transformer; the power mechanism is connected with the high-voltage side switch and the low-voltage side switch. The capacity-regulating transformer comprises the dry-type transformer on-load capacity-regulating transition device. The capacity-regulating transformer with the dry-type transformer on-load capacity-regulating transition device has high power supply continuity, can be suitable for places with high requirements for power supply continuity, and is low in cost due to the fact that the number of the adopted vacuum bubbles is small.

The invention discloses a distribution automation cabinet. The distribution automation cabinet comprises a cabinet body and a plurality of drawer cabinets, wherein the cabinet body is movably connected to the drawer cabinets, and the drawer cabinets are located in the cabinet body. The distribution automation cabinet is provided with a plurality of functional modules, and each functional module isassembled in a drawer type in the distribution automation cabinet to form a drawer unit module. Compared with the prior art, the distribution automation cabinet can be produced as a standardized product and functional module devices in the distribution automation cabinet can also be designed and produced as standardized products so as to be used together with any ring network cabinet group provided by the prior art or sold on the market; besides, the distribution automation cabinet can significantly solve the safety problems existing in the outdoor opening and closing in the prior art, and atthe same time, it can improve the continuity of power supply in outdoor opening and closing and is more conducive to the development and management of China's smart power grids, thus the distributionautomation cabinet has very broad application prospect.

The invention discloses a circuit fault protection system which comprises at least two paths of three-phase lines in parallel, wherein first electric signal acquisition units are arranged at neutral points of the three-phase lines; second electric signal acquisition units are arranged on parallel lines at the input ends of the two paths of the three-phase lines; third electric signal acquisition units are arranged on parallel lines at output ends of the two paths of the three-phase lines; conductive inserts are respectively arranged at two ends of a conductive connecting arm; and the conductive inserts are in selective conductive contact with electric connecting ends at two ends of a fault source. By adopting the circuit fault protection system, the technical problem that circuit failure is caused by line faults is solved.

The invention discloses a smart scanning and protecting system for a circuit failure. The system comprises two or more three-phase circuits arranged in parallel, multiple failure collecting units, multiple failure detection devices and one or more failure isolation devices. A first electrical signal collecting unit is arranged on a neutral point of the three-phase circuits, a second electrical signal collecting unit is arranged on the parallel line of the input ends of the two three-phase circuits, and a third electrical signal collecting unit is arranged on the parallel line of the output ends of the two three-phase circuits. An electric-conduction connecting arm is arranged on each failure isolation device, and electric-conduction connecting plugs are arranged at the two ends of each electric-conduction connecting arm respectively and make selective and conductive contact with the electric connection ends of the two ends of a failure source. The smart scanning and protecting system automatically positions and cuts off the failure source, and provides guarantees for safe operation of the circuits.

The present invention discloses a gas turbine test bed power supply system providing power uninterruptedly. The system comprises a generator, dual-power supply switch devices, a rapid switch device, circuit breakers, a distribution box for the test bed, and an uninterruptible power supply (UPS). A power source generated by the generator and the UPS are rapidly switched by a first dual-power supply switch device and the rapid switch device and then are transferred to the distribution box for the test bed. A first circuit breaker is disposed between the UPS and the first dual-power supply switch device. An intelligent circuit breaker is connected between the generator and the first dual-power supply switch device. The first circuit breaker and the generator are in signal connection. When the UPS fails, a signal is transmitted to the generator, so as to control the generator to start automatically, and the intelligent circuit breaker turns on automatically so as to output power. When the UPS is on, the generator receives a signal and turns off automatically. The gas turbine test bed power supply system providing power uninterruptedly ensures that the test bed works constantly and reliably.

The invention discloses a short-circuit protection method for a ship low-voltage direct-current power distribution system, and the method is based on a closed-loop power distribution system which is formed by connecting at least three direct-current bus sections in series through a direct-current solid-state switch. And the solid-state switches at the two ends of the fault direct-current bus section or the fault connecting line quickly act to cut off the fault part, and other non-fault direct-current bus sections and connecting lines keep normal operation. The system has better power supply continuity for a ship low-voltage direct-current power distribution system formed by multiple groups of power supplies and multiple bus sections, and can better meet the requirements of a DP2 or DP3-level dynamic positioning ship power distribution system.

The present invention discloses an outdoor switching station, comprising a ring main unit group, distribution automation cabinets and a housing, wherein the ring main unit group and the distribution automation cabinets are arranged in the housing, the distribution automation cabinets are arranged at the same side of the ring main unit group, the distribution automation cabinets are provided with a plurality of function modules, and each function module forms a drawer unit module in the distribution automation cabinet by being assembled in the form of drawer. Compared with the prior art, the outdoor switching station provided by the present invention can effectively solve a safety problem existing in an outdoor switching station in the prior art, and simultaneously can improve power supply continuity of the outdoor switching station, in addition, the outdoor switching station can be produced as a standardized product, and the function modules in the outdoor switching station also can be produced and designed as standardized products, thus development and management of a smart power grid of our country can be facilitated, therefore, the application prospect of the outdoor switching station of present invention is very wide.