30results about How to "Extend power supply distance" patented technology

The invention relates to a hybrid parallel type high-voltage direct current traction power supply current transformer and a control method thereof. The hybrid parallel type high-voltage direct current traction power supply current transformer is characterized by comprising a set of pulse width modulation (PWM) rectifier units and a set of diode rectifier units, wherein both an input end of the PWM rectifier units and an input end of the diode rectifier units are connected with an alternating current electric network, and an output end of the PWM rectifier units and an output end of the diode rectifier units are connected in parallel to realize high-voltage direct current output. Because the PWM rectifier units and the diode rectifier units are connected in series, the direct current output voltage of the entire current transformer is improved, the power supply distance is prolonged, and the contact net loss is reduced. Meanwhile, equipment investment is reduced, and the reliability of a system is improved. The hybrid parallel type high-voltage direct current traction power supply current transformer and the control method thereof can be widely applied to urban railway transit traction power supply systems.

The invention aims at providing a power supply system for electronic equipment and a corresponding frame power supply, wherein the power supply system comprises a back-up type high-voltage direct-current power supply and a frame power supply, the input end of the back-up type high-voltage direct-current power supply is of high-voltage alternating-current input, the output end of the back-up type high-voltage direct-current power supply is of high-voltage direct-current output, and the back-up type high-voltage direct-current power supply comprises a rectifier device used for charging a storage battery; and the frame power supply comprises a first module, a second module and a control switching device, wherein the first module is used for converting the high-voltage alternating-current input into a low-voltage direct-current output, the second module is used for converting the high-voltage direct-current input into a low-voltage direct-current output, output ends of the first module and the second module are connected in parallel together, output through a low-voltage direct-current bus and are used for supplying power for a plurality of electronic equipment, and the control switching device is used for controlling the switching of the first module and the second module and ensuring that the first module supplies power to the plurality of electronic equipment when the high-voltage direct-current power is normal and the second module supplies power to the plurality of electronic equipment when the high-voltage direct-current power is interrupted. Compared with the prior art, the power supply system has the advantages of high efficiency, high reliability and small investment.

The invention relates to an electrified railway in-phase power supply device and a multi-target coordinated instantaneous current control method adopted by the device. After the in-phase power supply device is used, the electrified railway whole-line in-phase power supply can be realized, the output power of two power supply arms of a traction transformer can be balanced, and the negative sequence problem can be thoroughly solved; the load reactive power and the harmonic current can be compensated, and the electric energy quality of a traction power supply system can be comprehensively improved; the voltage of a traction electric network can be stabilized, the transient state stability of the voltage can be improved, the power supply distance of the power supply arms can be increased, and the amount of power substations can be reduced; the electrified railway in-phase power supply device and the multi-target coordinated instantaneous current control method are multiple in targets, the multi-target can be simultaneously controlled, the control harmony at two sides can be guaranteed, the dynamic response capability is stronger; a rectification side inverter takes the active power transfer and the stable direct voltage as a control target, and participates the reactive power control; and an inversion side inverter performs active power, reactive power and harmonic wave control, and participates the stable control of the direct voltage.

The invention relates to an AC inductance-free energy-saving high-voltage DC traction power supply conversion device and a control method, which includes a multi-winding transformer and several conversion units. The multi-winding transformer consists of a primary winding and multiple secondary windings. Composed of windings, the number of circuits of the conversion unit is set corresponding to the number of secondary windings of the multi-winding transformer; the primary winding of the multi-winding transformer is connected to the AC power grid, and each secondary of the multi-winding transformer The side winding is connected to the input end of one converter unit, and the output terminals of each converter unit are serially connected in series to realize high-voltage direct current output. The invention saves electric energy, can ensure the stability of the DC power supply voltage, prolongs the power supply distance, and reduces the catenary loss. The invention can be widely used in urban rail transit traction power supply systems.

The invention relates to a negative voltage backflow DC supply system for track traffic. A negative voltage return line and a DC converter implementing negative voltage backflow are added in a conventional DC supply system, the negative voltage return line replaces a walk rail return line in the conventional DC supply system, stray currents of the conventional DC supply system and negative effects caused by overhigh potential of the walk rail relative to the earth can be greatly reduced or eliminated, loss of a supply line can be greatly reduced, and the supply distance of a DC traction substation can be raised. At the same time, the DC converter can be used as an energy storage apparatus for storing regenerative braking energy of a train, the utilization efficiency of the regenerative braking energy in the DC supply system can be raised, and the voltage of the DC supply system for track traffic can be kept stable.

The invention discloses a system for reducing potential of a subway train track. The system for reducing the potential of the subway train track comprises a return line, a negative impedence converterand a switch unit which is used for connecting the return line with a running rail. The system for reducing the potential of the subway train track is applied to the existing subway rail transit direct current traction power supply system; by adjusting output impedance of the negative impedence converter, the impedance from a return point of a traction substation to a closed switch unit via the negative impedence converter and the return line is enabled to approach zero and then the current of a train on the running rail in this section is transferred to the return line so that the potentialof the closed switch unit approaches the potential of the return point of the traction substation. According to the system for reducing the potential of the subway train track, the track potential inthe existing system can be greatly reduced to greatly reduce stray current corrosion. The system for reducing the potential of the subway train track can also be used for reducing the track potentialof a track in a novel direct current traction power supply system based on direct current auto-transformer power supply or can be used for reducing the track potential of a track in an alternating current traction power supply system.

The invention discloses a POE power supply control device, which comprises an input module, a boost control module, a straight-through switch, a central control module and an interface module, and ischaracterized in that the boost control module comprises a voltage comparison unit and a boost unit, and the interface module comprises a plurality of interfaces used for connecting a POE power receiving end; the voltage comparison unit judges whether the voltage input by the input module is boosted or not; if yes, the boosting unit is enabled, and the boosted voltage is output to the interface module by the boosting unit; if not, the direct connection switch is enabled, and the direct connection switch outputs the voltage to the interface module; and when the central control module responds to the power management instruction sent by the voltage comparison unit, power management is carried out on the interface module according to the connection state of the POE power receiving end and theinterface module and a power application instruction sent by the POE power receiving end. The invention also discloses a POE power supply system. According to the embodiment of the invention, the power supply distance of the standard POE can be effectively extended, and a relay function is realized; and meanwhile, the power is distributed and managed, and a Hub function is realized.

An intelligent remote low-voltage high-power electric power supply system and the operating method thereof belong to the technical field of the electronic technique application. The system comprises a local end part which is composed of a voltage boosting circuit and a single-chip computer, and a remote end part which is composed of a voltage releasing converting circuit and a charging control circuit. The remote end voltage releasing converting circuit is connected with a local end voltage boosting circuit, and at the same time is connected with the charging control circuit through a photocoupler. The charging control circuit and an accumulator are connected. A relay is in parallel connected between the charging control circuit and the output end of the accumulator. The output end of the accumulator is connected with the energy consumption terminal equipment. The invention has the advantages of reasonable design, easy manufacturing and convenient operation. The local end equipment adopts a low-voltage electric supply to the communication used electric terminal equipment. Not only the voltage and power of the power supply source are reduced for guaranteeing the safety of the circuit, but also the design of the energy source are sufficiently and reasonably used.

The invention provides a three-phase traction network distributed power generation and power supply system and a control method, and relates to the technical field of electrified railway traction power supply. A main bus of a main substation is connected with a three-phase traction cable through a feeder line, the primary side of a traction substation is connected with the three-phase traction cable, and the secondary side of the traction substation is connected with a three-phase traction network; power generation devices arranged along a corridor of a railway are connected into the traction substation in a distributed manner through the traction substation along the railway, and a central coordination controller arranged in the main substation controls the operation mode of the power generation device and performs power generation and reactive power distribution control. The distributed power generation and supply system is beneficial to supporting the system network voltage and prolonging the power supply distance, is also beneficial to the distributed access and nearby consumption of new energy, promotes the green development of a railway system, can avoid the related electric energy quality problems, and is mainly used for the management of access of the distributed power generation and supply system to the three-phase traction network.

The invention discloses a moving type segmented power supply induction electric energy transmission assembly. Multiple ground power source base stations are arranged near a rail along a power supply line, and multiple ground coils are arranged along the rail. The output ends of multiple ground power source modules in the same ground power source base station are connected to different alternatingcurrent buses, and power is supplied to the multiple adjacent ground coils at the same time through the alternating current buses, a diverter switch and a compensation module. A high-frequency magnetic field is generated by the ground coils, and a receiving module receives electric energy generated by the ground coils through electromagnetic induction. The whole power supply line is divided into multiple power supply sections. The power supply sections at the two ends of the power supply line are single-end power supply sections, and single-end power supply sections and double-end power supplysections are arranged between the single-end power supply sections at the two ends at intervals. Power is supplied to the ground coils in the single-end power supply sections through the ground powersource base stations in the single-end power supply sections. The ground power source base stations are not arranged in the double-end power supply sections, and power is supplied to the ground coilin each two-end power supply section at the same time through the two ground power source modules in the adjacent two single-end power supply sections.

The invention discloses a two-line system constant current source carrier communication bidirectional transmitting / receiving circuit. The bidirectional transmitting / receiving circuit comprises an upper computer T1 and multiple temperature sensors R1-Rn, wherein the upper computer T1 is respectively connected with multiple temperature sensors R-Rn through a constant current carrier communication line. The bidirectional transmitting / receiving circuit disclosed by the invention has the advantages as follows: 1, the constant current carrier communication scheme reduces the number of the networking line (reduced to two lines from four lines), and the wiring cost is reduced; 2, the constant current power supply is adopted, so that the anti-interference capacity of the power supply is improved, and the power supply distance is increased; 3, the adjustable constant current outputs can adjust the output current according to the system capacity, and the high-quality DC power supply capacity can be acquired under the situation of applying the communication data; and 4, in comparison with the way of combining the constant voltage power supply with the voltage modulation output, the way of combining the constant current power supply with and the voltage module output can effectively reduce the dynamic consumption in a triode in the modulation and demodulation circuit, and the working efficiency of the communication circuit is improved.

The invention relates to a rail transit negative voltage return DC power supply system. On the basis of the traditional DC power supply system, a negative voltage return line and a DC converter for realizing negative voltage return are added, and the negative voltage return line is used to replace the traditional DC power supply system. The return line of the running rail can greatly reduce or eliminate the stray stray currents in the traditional DC power supply system, and the negative impact of the running rail on the ground potential is too high, which can greatly reduce the loss of the power supply line and increase the DC traction substation. At the same time, the DC converter can also be used as an energy storage device for the regenerative braking energy of the train to improve the utilization efficiency of the regenerative braking energy of the DC power supply system and maintain the voltage stability of the rail transit DC power supply system.

The invention relates to a distribution network system of a mobile power station. The distribution network system is installed in a network cabin of a housing of the power station and includes a first-level distribution network system and a second-level distribution network system. The first-level distribution network system comprises a first-level cable reel, a main cable and a distribution box. The second-level distribution network system includes two second-level cable reels, two sub-cables and a plurality of multi-purpose power strips. The distribution box and the power station are connected together through the main cable and the sub-cables to form a plug-in type radial distribution network. The distribution network system of the mobile power station is suitable for medium and small power generator sets and has the designing features of compact structure and convenient operation. The distribution network system is disposed in the network cabin of the housing, completely separating the network cabin from a set cabin. The distribution network system of the mobile power station is applicable to occasions requiring power supply for multiple purposes. The power supply radius can be adjusted as required and power supply distance is long.

The invention discloses a device for providing electric energy for a plurality of passive electronic tags in a large-range space, which comprises a transmitting end and a receiving end, and is characterized by further comprising four middle ends, the transmitting end and the receiving end are coupled and connected through electromagnetic induction, and the four middle ends are distributed by taking the transmitting end as the center. And the four middle ends are coupled with the transmitting end in an electromagnetic induction manner. A traditional high-frequency radio frequency identification system is limited in power supply direction, short in power supply distance and low in degree of freedom, and the device adopts a magnetic coupling resonance wireless power transmission technology, a segmented compensation technology, an auxiliary coil resonance network and a dynamic tuning technology, so that the device generates a relatively uniform high-frequency alternating-current electromagnetic field in a large-range space; a plurality of passive electronic tags can obtain electric energy at any position in the space, and a power supply area can be expanded to dozens of cubic meters.

The invention comprises an accumulator with output end connected to the base station of little smart wireless city phone, a conversion circuit connected to local side and the control circuit by a multiplexer and a photocoupler respectively, which comprises a transformer, a switch source controller, a tri-end voltage stabilizing block, a MOSFET, a triode, a diode, and resistance and capacitor element; and a control circuit connected to the accumulator, which comprises an operational amplifier, a triode, a diode, and resistance and capacitor element. Wherein, it parallels a relay between the control circuit and the lead-acid accumulator (1.2-2A / h, 12V*17).

A bus sensor comprises a main power supply (1), a core power supply (3), an auxiliary power supply (4), a communication power supply (5), a core processing circuit (6), a display circuit (7), a sensing module circuit (8) and a communication circuit (9), wherein the main power supply (1) supplies power to the core power supply (3), the auxiliary power supply (4) and the communication power supply (5), the core power supply (3) maintains continuous power supply, the core power supply (3) is connected with the core processing circuit (6), and the core processing circuit (6) enters a dormant statewhen not working. According to the invention, independent power supply control is added to other parts of the sensors except the core circuit, so that the sensors are powered off, and the transient current when the plurality of sensors are powered on and started is reduced by starting the sensors in a time-sharing manner, so that the number of the sensors connected with the bus can be increased.

A remote power supply control device disclosed by the invention comprises an electricity meter connected with an electric device, an input module, a boost control module, a through switch, a central control module, an interface module and a power supply module, the boost control module comprises a voltage comparison unit and a boost unit, and the interface module is used for connecting the electric device. The power supply module comprises a power distribution circuit, a first power limiting circuit and a second power limiting circuit. The electricity meter comprises a first function module and a second function module. By adopting the technical scheme of the invention, the power can be effectively distributed and managed, and meanwhile, the reliability of an intelligent instrument is improved.

The invention discloses an intelligent bicycle lock wireless-charging module which comprises a charging box body, a control module, a wireless transmitting coil and an intelligent bicycle lock wireless-receiving coil. A handle is fixed to the right side wall of the charging box body, a liquid crystal display screen is arranged on the front side of the charging box body, a power line interface is formed below the liquid crystal display screen, a loudspeaker is arranged on the right side of the power line interface, the control module is arranged in the charging box body, the signal output end of the control module is connected with a low-electric-quantity alarm module and the liquid crystal display screen, the input end of a filtering circuit is connected with a rectifying circuit, the input end of the rectifying circuit is connected with a switch control module, the input end of the switch control module is connected with a power supply, the wireless transmitting coil is arranged at the top end of the charging box body, and the output end of the wireless transmitting coil is connected with the intelligent bicycle lock wireless-receiving coil through a wireless signal. The intelligent bicycle lock wireless-charging module achieves wireless charging without a charging wire matched with an intelligent device and is very intelligent.

The invention provides an AT traction network distributed power supply system and a control method, belonging to the technical field of electrified railway traction power supply. The traction side of the same-phase traction substation is connected to the traction busbar, and the traction busbar is connected to the AT traction network through the feeder. The central coordination controller controls the operation mode of the power generation device, and controls the power generation and reactive power distribution; it is mainly used to further extend the power supply distance of the same-phase AT traction network, as well as the distributed access and nearby consumption of new energy, so as to promote the green development of the railway system .

The invention provides a traction network distributed power generation and power supply system and a control method, and relates to the technical field of electrified railway traction power supply. The traction side of the same-phase traction substation is connected to the traction busbar, and the traction busbar is connected through the feeder traction network. The power generation devices installed in the corridor along the railway line are connected to the traction power supply system in a distributed manner through the switching stations along the line. The central coordination of the traction substation The controller controls the operation mode of the power generation device, and controls power generation and reactive power distribution; the use of distributed access traction power supply system is conducive to supporting the system network voltage, extending the power supply distance, and is also conducive to the distributed access and nearby consumption of new energy. Promoting the green development of the railway system can avoid related power quality problems. It is mainly used for the management of the distributed power supply system connected to the traction network.

The invention provides an electrical train based on ground traction power supply. The electrical train comprises a traction motor and a reactive power compensator connected with the traction motor, and the traction motor is driven and controlled through a ground traction converter; and the reactive power compensator emits reactive current according to the operation state of the traction motor and provides excitation and reactive power compensation for the traction motor. The traction motor in the electric train is driven and controlled by the ground traction converter, so that a vehicle-mounted traction converter and a vehicle-mounted traction transformer are omitted, and the reactive power compensator for providing excitation and reactive power compensation for the traction motor is arranged in the electric train, so that the axle load of the electrical train can be effectively reduced, the effective space of the electrical train is improved, the running speed and efficiency of the electrical train are improved, and the power factor of the electrical train and the power transmission distance of a three-phase traction network can be improved.

The invention discloses a POE power supply control device, comprising: an input module, a boost control module, a through switch, a central control module and an interface module, the boost control module includes a voltage comparison unit and a boost unit, and the interface module includes several interfaces , used to connect to the POE power receiving end; the voltage comparison unit judges whether to boost the voltage input by the input module; if so, enables the boost unit, and the boost unit outputs the boosted voltage to the interface module; if not, Then enable the pass-through switch, and the pass-through switch outputs the voltage to the interface module; when the central control module responds to the power management command sent by the voltage comparison unit, according to the connection status between the POE power receiving end and the interface module and the power application command sent by the POE power receiving end Performs power management on the interface module. The invention also discloses a POE power supply system. The embodiment of the present invention can effectively expand the power supply distance of the standard POE to realize the relay function; at the same time, it can allocate and manage the power to realize the Hub function.

The invention relates to a heavy haul railway AT power supply capacity calculation method; when the method is used, an AT power supply heavy haul railway traction cable cut-through power supply scheme is calculated, mathematical models of CTN equivalent impedance, current distribution, voltage loss, CTN tail end network voltage and other electrical parameters are deduced, then the calculation method of the power supply distance is obtained, and the power supply capacity of the scheme is judged. The current heavy haul railway AT power supply scheme is convenient to reform, so that the current heavy haul railway AT power supply system has greatly reduced electric split phases, improved power supply capability and prolonged power supply distance, the operation of a locomotive is safer and more reliable, and the operation speed is improved.

The invention comprises an accumulator with output end connected to the base station of little smart wireless city phone, a conversion circuit connected to local side and the control circuit by a multiplexer and a photocoupler respectively, which comprises a transformer, a switch source controller, a tri-end voltage stabilizing block, a MOSFET, a triode, a diode, and resistance and capacitor element; and a control circuit connected to the accumulator, which comprises an operational amplifier, a triode, a diode, and resistance and capacitor element. Wherein, it parallels a relay between the control circuit and the lead-acid accumulator (1.2-2A / h, 12V*17).

The invention discloses a moving type segmented power supply induction electric energy transmission assembly. Multiple ground power source base stations are arranged near a rail along a power supply line, and multiple ground coils are arranged along the rail. The output ends of multiple ground power source modules in the same ground power source base station are connected to different alternatingcurrent buses, and power is supplied to the multiple adjacent ground coils at the same time through the alternating current buses, a diverter switch and a compensation module. A high-frequency magnetic field is generated by the ground coils, and a receiving module receives electric energy generated by the ground coils through electromagnetic induction. The whole power supply line is divided into multiple power supply sections. The power supply sections at the two ends of the power supply line are single-end power supply sections, and single-end power supply sections and double-end power supplysections are arranged between the single-end power supply sections at the two ends at intervals. Power is supplied to the ground coils in the single-end power supply sections through the ground powersource base stations in the single-end power supply sections. The ground power source base stations are not arranged in the double-end power supply sections, and power is supplied to the ground coilin each two-end power supply section at the same time through the two ground power source modules in the adjacent two single-end power supply sections.

The invention relates to an energy supply module using radio frequency energy. The energy supply module comprises a radio frequency chip for configuring a radio frequency signal, a power amplification chip for amplifying the radio frequency signal and an antenna for transmitting the amplified radio frequency signal, and the duty ratio of the radio frequency chip is set to be 50%-100%, and the modulation mode is set to be OOK / FSK / GFSK; The energy supply module does not depend on a wireless charging module, long-distance power supply is realized by sending a carrier signal which is high in duty ratio and is not limited by a modulation mode as radio frequency energy, only a radio frequency chip with a proper radio frequency band needs to be selected when the wireless power supply device is applied, the power supply distance can be remarkably increased by applying the mode of the wireless power supply device, tests show that the power supply distance reaches 3 meters when the transmitting power is 33 dBm, and the problem that wireless charging is large in limitation and difficult to popularize and apply is solved.