1111 results about "Isolation transformer" patented technology

The invention relates to the technical field of hybrid inverters, and discloses a hybrid inverter supporting reactive compensation and a control method thereof, and the hybrid inverter comprises a DC input unit, a three-phase full-bridge inversion unit, a grid-connected switching unit, a signal acquisition unit and a digital control unit. The direct current input unit comprises a photovoltaic interface, a battery interface and a direct current bus and is used for converging photovoltaic and energy storage electric energy; the three-phase full-bridge inversion unit is composed of a power device and an LCL filter and converts direct current into alternating current. The grid-connected switching unit comprises a static switch and an isolation transformer and is used for controlling power grid connection; the signal acquisition unit detects voltage and current signals; and the digital control unit judges a grid-connected mode or an off-grid mode according to the signal, calculates a reactive current reference value and generates a PWM (Pulse Width Modulation) control signal so as to realize reactive compensation control in the grid-connected mode and the off-grid mode. According to the invention, reactive power compensation capability is provided in both grid-connected and off-grid operation modes, and stable operation of the inverter in various working conditions is ensured.

The invention discloses an energy storage converter test power setting method and device, and relates to the field of converter testing, the energy storage converter test power setting method is applied to an energy storage converter test system, and the energy storage converter test system comprises a high-voltage power grid, a power isolation transformer, a first energy storage converter and a second energy storage converter; wherein the high-voltage power grid is electrically connected with one end of the power isolation transformer, and the first energy storage converter and the second energy storage converter are electrically connected with the other end of the power isolation transformer. Sending a first optical fiber signal to a second energy storage converter based on the target optical fiber transmission channel; and indicating the second energy storage converter to set the power of the second energy storage converter based on the received optical fiber signal, so that the sum of the set second power of the second energy storage converter and the power indicated in the received optical fiber signal is zero.

The power supply conversion circuit includes an isolation transformer, and the isolation transformer includes at least two primary coils and at least one secondary coil. Each primary coil is connected to a half-bridge circuit by using a first resonant network, and half-bridge circuits corresponding to the at least two primary coils are connected in series between two electrodes of a power supply. The half-bridge circuit is connected in parallel to a voltage divider, the voltage divider includes a first capacitor and a second capacitor that are connected in series, a first terminal of the first resonant network is connected to an intermediate node of the half-bridge circuit, and a second terminal of the first resonant network is connected to a connection point between the first capacitor and the second capacitor.

The utility model discloses a zero interruption dual power supply fast switching device, comprising a dual power supply switch, a power electronic assembly, an output switch QF and a load which are connected in sequence, the power electronic assembly comprises an electronic bypass unit VT, a mechanical bypass contactor KM, an isolation transformer TM, a bidirectional converter CU and a super capacitor energy storage unit CAP, a contact S1 in the dual-power switch is connected with a main power supply, a contact S2 is connected with a standby power supply, a mechanical bypass contactor KM is connected with an electronic bypass unit VT in parallel, an isolation transformer TM is connected to the output end of the electronic bypass unit VT, and the two ends of a bidirectional converter CU are connected with the isolation transformer TM and a super capacitor energy storage unit CAP respectively. According to the device, the dual-power-supply change-over switch is matched with the power electronic component, so that rapid switching of the dual-power-supply switch is realized, the problem of power supply interruption in the switching process is solved, and the reliability of power supply is improved; and meanwhile, few energy storage elements are used, and the cost is low.

The utility model provides an energy storage twin trawling test system. The energy storage twin trawling test system comprises a first test unit, a second test unit and an isolation transformer, the first test unit comprises a first test battery system, a first test battery management system and a first energy storage converter; the second test unit comprises a second test battery system, a second test battery management system and a second energy storage converter; the first test unit and the second test unit are connected through corresponding energy storage converters; the first test unit and the second test unit are electrically connected with a secondary winding of the isolation transformer through the corresponding energy storage converters respectively; and the primary winding of the isolation transformer is connected with the low-voltage side of the power grid. According to the invention, independent shutdown can be realized when any test unit fails, and the other test unit can be switched to a zero-power operation mode to realize fault interlocking when any test unit fails to stop, so that tripping of a grid-connected transformer switch due to reverse power of a grid-connected point is avoided.

The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, power-side alternate current (AC) to direct current (DC) converters may be connected to a source power grid without the need for an isolation transformer by providing separate buses between the power-side AC-DC converters and load-side DC-DC converters instead of a shared DC bus between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tappable transformer or an autotransformer, to connect any number of auxiliary loads of the plant to the power grid. The adjustable transformer may provide for various types of auxiliary load devices to connect to the power provided by the transformer at the same time, including both three-phase devices and one-phase devices.

The invention belongs to the field of power transmission line parameter measurement, and discloses a live-line testing device and method for mutual inductance line parameters and zero-sequence impedance parameters. The device comprises a double-circuit line simulation module, a pilot frequency excitation module, a power frequency simulation module, a synchronous acquisition module and a signal processing module. The isolation transformer simulates a double-circuit line, the pilot-frequency power supply provides pilot-frequency excitation signals, the measurement unit realizes synchronous acquisition, and the signal processing module performs anti-interference and amplification processing. The method comprises the steps of line simulation wiring, synchronous time synchronization, pilot frequency signal acquisition, parameter calculation and error verification, and pilot frequency parameters are converted into power frequency parameters by using a frequency conversion formula. According to the invention, power frequency interference can be effectively suppressed in a charged environment, high-precision measurement of zero-sequence impedance and mutual inductance parameters of a mutual inductance line is realized by using pilot frequency excitation and Beidou synchronization technologies, the measurement error is remarkably reduced, the safety and reliability are remarkably improved, and powerful technical support is provided for safe and stable operation of a power system.

The invention discloses a multi-energy micro-grid power supply system based on a hydrogen fuel cell and a control method. The micro-grid power supply system comprises an intelligent grid-connected switch, an electrical load, an isolation transformer, an energy storage converter, a hydrogen fuel cell system, an energy storage lithium battery system and a local energy management system. The control method comprises the steps that when a power grid loses power or a PCC switch is switched off, an energy storage converter PCS is automatically switched to an off-grid operation mode or is switched to an off-grid operation mode according to an off-grid command, and stored electric energy is continuously used for on-load operation; when the power grid recovers or is converted into grid connection in a planned manner, the PCS is automatically synchronized to a state which is synchronous with the power grid or according to a grid connection command, and the intelligent static switch is closed to be converted into grid connection operation. According to a coordination control strategy among the PCS converter, the intelligent grid-connected switch and the energy storage battery and an SOC grading strategy between the fuel battery and the energy storage battery, functions of millisecond-level fast switching of grid-connected and off-grid operation, variable load fast energy scheduling control of a load and the like are realized.

The invention relates to the technical field of alternating current electrified railway power supply, in particular to a negative sequence treatment method and system for an electrified railway traction substation, and the system comprises a step-down isolation transformer and an SVG compensation subsystem. The primary side of the step-down isolation transformer is used for being connected with the high-voltage wire inlet side of a three-phase power grid of a traction substation, and three-phase medium-voltage electricity is formed after step-down isolation and connected to a three-phase medium-voltage bus. The SVG compensation subsystem is used for being connected to a three-phase medium-voltage bus; the SVG compensation subsystem is used for outputting negative sequence compensation current; the direction of the negative-sequence compensation current is opposite to that of the negative-sequence current generated by the traction load, and the negative-sequence compensation current and the load current generated by the traction load counteract each other, so that the treatment of the negative-sequence current is realized.

The invention discloses a through traction power supply system based on two-phase-single-phase isolation and non-isolation hybrid topologies, and belongs to the technical field of power electronic transformers, the through traction power supply system comprises two single-phase isolation and non-isolation hybrid topologies, each single-phase isolation and non-isolation hybrid topologies comprises an isolation unit and a non-isolation unit which are cascaded, each isolation unit comprises one or more cascaded isolation modules, the isolation module comprises a first rectifier, an isolation type power electronic transformer and a first inverter which are in cascade connection in sequence; the non-isolation unit comprises one or more cascaded non-isolation modules, and each non-isolation module comprises a second rectifier and a second inverter which are cascaded in sequence. Compared with a system adopting transformer isolation, an industrial frequency transformer and part of high-frequency isolation transformers are omitted, a short-circuit path can be blocked based on the isolation module, the topological volume is effectively reduced, the cost is reduced, and compared with a completely non-isolated system, the available vector plane is widened, and the safety and reliability of the system are high.

A bidirectional high voltage AC-DC converter includes a primary three-phase three-level T-type power factor correction circuit, a full-bridge switching circuit connected to the primary three-phase three-level T-type power factor correction circuit output, an isolated capacitor-inductor-inductor-capacitor (CLLC) resonant tank connected to the full-bridge switching circuit, a T-type full-bridge output topology circuit connected to the CLLC resonant circuit, and a controller that controls one or more of the components of the bidirectional isolated high voltage AC-DC converter. The primary three-phase three-level T-type power factor correction circuit and the secondary three-level circuit include a split DC-link bus with respective voltages that are actively controlled by the controller. The CLLC resonant converter circuit includes an isolation transformer that electrically isolates the primary side from the secondary side of the bidirectional isolated high voltage AC-DC converter. A control method includes synthesizing, via a modified space vector pulse width modulation (SVPWM) scheme or a variable-amplitude double-carrier sine-triangle PWM with capacitor bank middle point voltage control, one or more output voltages of the front end three-phase three-level T-type PFC circuit, wherein the modified SVPWM scheme is based, at least in part on a nearest four vectors technique.

The utility model discloses a soft start system based on excitation current reduction, which is characterized in that a time relay mainly controls the switching of a live wire between a power resistor and an alternating current contactor, the power resistor magnetizes a transformer at the moment of electrification, and the alternating current contactor is connected into a circuit by the time relay after the magnetization is completed; and after the power resistor is short-circuited, the circuit is cut out, so that the purpose of suppressing the excitation inrush current is finally achieved, the excitation effect caused by voltage abrupt change at the power-on moment of the isolation transformer can be avoided, and the excitation abrupt change of the isolation transformer during power-on is effectively reduced.

The invention discloses an efficient new energy transformer and an electric energy control system, and relates to the technical field of transformers, an input power conversion module is used for converting a direct current or alternating current variable voltage source into high-frequency alternating current for output, and a high-frequency isolation transformer module adopts a nanocrystalline-amorphous alloy mixed magnetic core. The windings are arranged in a three-layer staggered mode and provided with an oil dual-cooling system, and the output rectification inversion module is used for converting high-frequency alternating current into needed direct current or alternating current to be output and integrates the multi-phase synchronous rectification function and the active filtering function. By designing the nanocrystalline-amorphous alloy mixed magnetic core and the three-layer staggered winding, leakage inductance is reduced, the coupling coefficient is increased, the problems of leakage inductance and nonuniform magnetic flux caused by serious iron loss, large leakage inductance and unreasonable coil arrangement of a traditional single-material low-frequency iron core at medium and high frequencies are solved, hysteresis and eddy-current loss are effectively inhibited, and the service life of the low-frequency iron core is prolonged. The leakage inductance is minimized, the high-frequency transformation efficiency is improved, and the size and the weight are reduced.

The invention provides a double-phase pulse circuit and a high-frequency pulse therapeutic apparatus, and relates to the technical field of medical instruments, and the double-phase pulse circuit comprises a booster circuit, N groups of pulse modulation isolation transformation circuits, an amplitude-limiting current-limiting circuit, a cascade circuit, a double-phase wave modulation circuit and a main controller, the boost circuit performs pulse modulation and boost processing on the output DC voltage of the target DC power supply to obtain an initial pulse voltage signal; n groups of pulse modulation isolation transformation circuits respectively perform isolation boosting processing on the initial pulse voltage signals to obtain N high-voltage pulse signals; the amplitude-limiting current-limiting circuit performs amplitude-limiting current-limiting processing on the N high-voltage pulse signals to obtain N high-voltage square-wave pulse signals; performing cascade processing on the N high-voltage square-wave pulse signals to obtain a target square-wave pulse signal; and performing dual-phase modulation on the target square wave pulse signal to obtain a target dual-phase pulse signal. According to the technical scheme, the effect of improving the safety of the double-phase pulse circuit is achieved.

The invention discloses an improved single-bridge arm power electronic transformer topological structure, which belongs to the field of power electronic converters and comprises a three-phase alternating current filter inductor Lg, a phase main bridge arm circuit, a three-phase common half-bridge circuit, a high-frequency series inductor capacitor L1 / C1, a high-frequency isolation transformer, a low-voltage side rectifier and a common isolation DC-DC converter. The topological structure belongs to a single-stage structure, each phase only needs a string of bridge arms, alternating-current and direct-current side power transmission is realized by directly adopting hybrid frequency conversion, the number of devices of a power electronic transformer can be reduced, and the cost is reduced; a three-phase common half-bridge circuit is introduced, so that the multi-frequency coupling degree of a bridge arm is reduced, and control is simplified; and the reasonable circuit parameter design is combined, the number of the main bridge arm sub-modules is optimized, and the efficiency can be improved. The topology is suitable for all application occasions needing conversion from medium-voltage alternating current to low-voltage direct current.

The invention discloses a three-level IGBT (Insulated Gate Bipolar Translator) module active test system, which comprises a front-end bidirectional direct-current power supply module, an inverter power supply module, a controller module and an isolation transformer, and is characterized in that the inverter power supply module comprises an IGBT test tool and an intermediate direct-current capacitor group; the IGBT test tool is used for placing a three-level IGBT module to be tested; the intermediate direct-current capacitor group is connected to the direct-current side of the to-be-tested three-level IGBT module and forms the direct-current side of the inverter power supply module, and the alternating-current side of the to-be-tested three-level IGBT module forms the inverter side of the inverter power supply module; the front-end bidirectional direct-current power supply module is electrically connected with the direct-current side of the inverter power supply module; the AC side of the inverter power supply module is connected with an AC power grid through an isolation transformer. And the controller module is in signal connection with the inverter power supply module and is used for sending a driving pulse signal to the three-level IGBT module to be tested so as to control the operation of the three-level IGBT module active power test system and monitor the operation state and the temperature state of the three-level IGBT module wafer to be tested.

The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, power-side alternate current (AC) to direct current (DC) converters may be connected to a source power grid without the need for an isolation transformer by providing separate buses between the power-side AC-DC converters and load-side DC-DC converters instead of a shared DC bus between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tappable transformer or an autotransformer, to connect any number of auxiliary loads of the plant to the power grid. The adjustable transformer may provide for various types of auxiliary load devices to connect to the power provided by the transformer at the same time, including both three-phase devices and one-phase devices.

An apparatus for transferring power includes a first power converter coupled to a first power interface, an isolation transformer having a first transformer coil coupled to the first power converter and a second transformer coil magnetically coupled to and galvanically isolated from the first transformer coil, a second power converter coupled to the second coil of the isolation transformer and to a second power interface, a third transformer coil magnetically coupled to and galvanically isolated from the first transformer coil and magnetically coupled to the second transformer coil, and a third power interface for connecting the third transformer coil to a wireless power transmission (WPT) resonator.

A power conversion device includes: a DC / DC converter; and a control circuit unit that controls the DC / DC converter, in which the DC / DC converter includes a first power output circuit that converts first direct current power into first alternating current power, an isolation transformer that converts the first alternating current power into second alternating current power, and one or a plurality of second power output circuits, each of which converts the second alternating current power into second direct current power, and the control circuit unit includes a resonance characteristic calculator that calculates a resonance characteristic of the second power output circuits based on a load for each of the second power output circuits to output the second direct current power, and determines a drive frequency of the first power output circuit based on an output request value of the second power output circuit and the resonance characteristic that is calculated.

The utility model belongs to the field of photovoltaic isolation transformers, and particularly relates to a photovoltaic isolation transformer with a mounting structure, which comprises a base, the top of the base is fixedly connected with a positioning shell, two sides of the top of the base are respectively provided with a sliding chute, inner cavities of the two sliding chutes are respectively connected with a sliding block in a sliding manner, and the sliding blocks are arranged in the sliding chutes. A positioning frame is fixedly connected between the tops of the two sliding blocks. Through the positioning and clamping mechanism, the transformer body can be limited under the action of the positioning and clamping mechanism, so that not only is the mounting efficiency of workers improved, but also the workers can conveniently disassemble and maintain the transformer body under the action of reverse rotation of the output end of the motor; the problems that an existing photovoltaic isolation transformer is usually fixed in a box body through bolts, after the photovoltaic isolation transformer is damaged, workers need to dismantle the bolts one by one, in this way, matching tools are needed, the disassembling and assembling process is tedious, and therefore the maintenance efficiency of the workers is reduced are solved.

A lighting apparatus includes an isolation transformer, an output rectification and voltage regulation circuit, an output current limiting and filtering circuit, and a signal detection and generation circuit. The homonymous terminal of the primary side opposes the homonymous terminal of the secondary side. The output rectification and voltage regulation circuit is connected to the secondary coil of the isolation transformer. The output rectification and voltage regulation circuit rectifies and stabilizes the voltage signal output by the isolation transformer. The output current limiting and filtering circuit is connected to the dimmer and the output rectification and voltage regulation circuit. The output current limiting and filtering circuit adjusts the output current and output voltage according to the operation of the dimmer, and the output current limiting and filtering circuit limits and filters the signal output by the output rectification and voltage regulation circuit.

The invention discloses an aircraft ground static variable power supply supporting zero crossing and low crossing and a control method and a working method thereof. The aircraft ground static variable power supply comprises a main loop, an energy storage system and an auxiliary power supply part. The main loop consists of an input main switch, an ACDC rectifier, a DCAC inverter and an output contactor which are connected in sequence; the energy storage system is composed of an auxiliary switch, an ACDC charging device and a super capacitor energy storage device which are connected in sequence. Alternating current of a power grid sequentially passes through the auxiliary switch and the ACDC charging device to supply power to the super-capacitor energy storage device, and the super-capacitor energy storage device supports a direct-current bus through a discharging diode; the auxiliary power supply part comprises an isolation transformer and an AC-DC power supply; power grid alternating current is independently input into the alternating-direct current power supply after passing through the isolation transformer, and direct-current bus high-voltage direct current is independently input into the alternating-direct current power supply and outputs low-voltage direct current. The zero crossing time and the low crossing time are increased, the size and the weight of the ground static variable power supply of the airplane are reduced, and the cost is reduced.

The invention relates to a direct-current transformer circuit topology based on a series three-phase bridge circuit and a control method thereof. A high-voltage side power unit comprises N three-phase series half-bridge circuits which are sequentially connected in series; the low-voltage side power unit comprises N three-phase parallel half-bridge circuits which correspond to the three-phase series half-bridge circuits and are sequentially connected in parallel, each three-phase series half-bridge circuit is connected with the corresponding three-phase parallel half-bridge circuit through a three-phase isolation transformer to form N groups of three-phase bridge modules, and meanwhile, the N groups of three-phase bridge modules are connected with the N groups of three-phase isolation transformers. A symmetrical duty ratio and phase shift hybrid control strategy is adopted to realize bidirectional flow of energy and soft switching in a full range, and intra-module and inter-module phase shift control is adopted to realize voltage sharing of a series side, reduce current ripples of a parallel side, reduce backflow power and improve the efficiency of the converter.

The invention discloses an FMQL20S-based navigation computer system and a software and hardware collaborative architecture, and relates to the field of computer systems. Comprising a programmable fusion chip JFMQL20S4841, a 1553B transceiver and isolation transformer 6, an ARINC429 transceiver 7, a self-isolation RS422 chip 8, a self-isolation RS232 chip 9, an RC resistance-capacitance filter 10, an RS422 first interface chip 11, an RS422 second interface chip 15, an RS422 third interface chip 16 and an RS422 fourth interface chip 17. The method is used for solving the prominent defects of high design cost, poor universality, time-consuming calculation, incapability of miniaturization and the like due to the fact that various performance indexes such as fusion of different sensors and calculation of a large amount of data need to be realized in the current navigation computer system design.

The utility model discloses a factory energy storage test system which comprises a first low-voltage cabinet and an isolation transformer which is connected to the wire outlet end of the first low-voltage cabinet and provides electrical isolation. The second low-voltage cabinet is connected to one line outgoing end of the isolation transformer so as to protect and monitor the circuit; the third low-voltage cabinet is connected to the other line outlet end of the isolation transformer so as to protect and monitor the circuit; the energy storage converter is divided into two paths which are connected with the second low-voltage cabinet and the third low-voltage cabinet in a one-to-one correspondence manner to convert alternating current into direct current for output; and the cable switching cabinet is connected with the output positive and negative electrodes of the energy storage converter and the positive and negative electrodes of the battery cabin, so that electric energy flows between the energy storage converter and the battery cabin. The system can adapt to different voltage and power demand scenes, supports off-grid operation, grid-connected operation and testing in a twin-trawling mode, can be seamlessly switched between a grid-connected mode and an off-grid mode, can realize energy exchange between two groups of independent energy storage batteries, reduces energy consumption, improves energy efficiency, and reduces energy cost.

The invention discloses an auxiliary power supply and an energy storage system. The auxiliary power supply comprises an input interface, at least two switch modules, an isolation transformer, an output module, a control module and a driving module. The input interface is configured to access a power supply module, the output module is configured to access a load, and working voltages of different switch modules are different; the isolation transformer comprises at least two primary sides and a secondary side coupled with the primary sides, different primary sides have different inductance values, each primary side is connected with the input interface through one switch module, the secondary side is electrically connected with the output module, and the control module is connected with the input interface and each switch module and is configured to detect the power supply voltage of the input interface; the control module is connected with each switch module and outputs a target control signal according to the power supply voltage, the driving module is connected with the control module and each switch module and is used for driving the target switch module to work according to the target control signal, and the target switch module is one of the switch modules. Therefore, the auxiliary power supply can stably and efficiently work in a wide working voltage range.

The invention relates to an expandable distributed voltage controller, and relates to the technical field of power grid electric energy management, the expandable distributed voltage controller comprises a series-parallel module comprising a parallel converter, a first series converter, a first DC capacitor and an isolation transformer, the DC side of the parallel converter is connected with the DC side of the first series converter through the first DC capacitor, and the DC side of the first series converter is connected with the isolation transformer through the isolation transformer; the alternating current side of the series converter is connected in series to the power grid side through the isolation transformer; and the series connection module comprises a second series connection converter, a second direct current capacitor and an isolation transformer, the second direct current capacitor is arranged on the direct current side of the second series connection converter, and the second series connection converter is connected to the load and / or the grid connection position in series through the isolation transformer. A plurality of problems can be solved while the power quality problem of the power grid is governed, so that the application range is wider.

The invention provides a multi-output switching power supply and a control method thereof, the multi-output switching power supply comprises a primary power loop, an isolation transformer, a secondary power loop, N output branches and a control device, the primary power loop is connected with a primary winding of the isolation transformer; the primary power loop is connected with a primary winding of the isolation transformer, the secondary power loop is connected with a secondary winding of the isolation transformer, the secondary power loop is further connected with the N output branches, and the control device is connected with the primary power loop, the secondary power loop and the N output branches and used for controlling the primary power loop according to feedback signals of the N output branches. And the total energy transmitted from the primary winding to the secondary winding of the isolation transformer is adjusted, and the N output branches are controlled to be conducted in a time-sharing manner in a follow current period of the secondary power loop, so that the output of multiple voltages is realized with relatively low cost and complexity and relatively high efficiency.

A motor power source regulation circuit, a control method and an electronic device are provided. The motor power source regulation circuit includes a power factor correction circuit, an isolation circuit, a first power source conversion circuit, a second power source conversion circuit and a control circuit. The isolation circuit includes a first switch sub-circuit and an isolation transformer. The power factor correction circuit regulates an AC input signal to a first DC signal. The first switch sub-circuit converts the first DC signal to a first AC signal. The isolation transformer converts the first AC signal to two or more second AC signals. The first power source conversion circuit converts the second AC signal to a DC drive signal and outputs it to a DC motor. The second power source conversion circuit converts the second AC signal to an AC drive signal and outputs it to an AC motor.

The present invention discloses a power supply and distribution system for a high-voltage power transformer on-site detection vehicle. The on-board mobile power supply (hereinafter referred to as "on-board power supply") is connected in parallel with the 12V DC power consumption part and the 220V AC power consumption part through the No. 1 isolating switch, the inverter power supply, and the switching power supply, and is connected in parallel with the 12V DC power consumption part through the No. 2 isolating switch; the external power supply (hereinafter referred to as "mains power") is connected in parallel with the 12V DC power consumption part, the 220V AC power consumption part, and the on-board power supply through the isolation transformer, the No. 1 isolating switch, the inverter power supply, and the switching power supply, and is connected in parallel with the 220V AC power consumption part through the No. 2 isolating switch, and is connected in parallel with the ceiling air conditioner; the automobile generator is connected in parallel with the on-board power supply through the dual battery isolation controller, and is connected in parallel with the 12V DC power consumption part through the No. 2 isolating switch. The present invention has the advantages of flexible operation, wide application, and complementary advantages.