CN110182103A - A kind of Novel power system - Google Patents

Abstract

The embodiment of the invention discloses a novel power system. The new power system includes: a first power supply module, including at least two battery modules, each battery module includes a positive output terminal and a negative output terminal, a battery, and a battery management module connected to a host computer, and the battery is connected in series at the positive output terminal and the negative terminal. Between the output terminals, the battery management module is used to detect the working parameters of the battery; the converter module includes at least two sets of battery input terminals and two bus connection terminals, and there is a transformer connected in series between the bus connection terminals and each group of battery input terminals. The converter controls one of the at least two battery modules to perform balance correction according to the control signal of the host computer, and at the same time controls the other battery modules of the at least two battery modules to supply power to the bus connection end. The embodiment of the present invention realizes balance correction while the storage battery supplies power.

Description

A new type of power system

technical field

The embodiment of the present invention relates to engineering machinery technology, especially to a new type of power system

Background technique

A crane refers to a multi-action hoisting machine that lifts vertically and carries heavy objects horizontally within a certain range.

The power system of the existing crane includes diesel engine power supply, diesel engine and mains switching power supply, battery and diesel engine common power supply, etc., and the battery used is a lithium battery.

However, in the process of frequent high-current discharge and high-current charging of lithium batteries in the crane industry, the battery intelligent management system is very prone to large errors in the estimation of battery power, and the cells in the battery pack are likely to produce voltage imbalances. Seriously reduce battery life, or even battery accidents, and when using battery packs for power supply, it is necessary to stop the battery for power calibration and cell voltage balance.

Contents of the invention

An embodiment of the present invention provides a novel power system to realize balance correction while supplying power from a battery pack.

To achieve this purpose, the embodiment of the present invention provides a novel power system, including:

The first power supply module includes at least two battery modules, each battery module includes a positive output terminal and a negative output terminal, a storage battery, and a battery management module connected to a host computer, and the storage battery is connected in series to the positive output terminal and the negative output terminal Among them, the battery management module is used to detect the working state of the storage battery; the converter module includes at least two sets of battery input terminals and two busbar connection terminals, and each set of battery input terminals includes a positive input terminal and a negative input terminal, The positive input terminal is connected to the positive output terminal of the battery module, the negative input terminal is connected to the negative output terminal of the battery module, and a converter is connected in series between the busbar connection terminal and the input terminal of each group of batteries. The converter controls one of the at least two battery modules to perform balance correction based on the operating parameters according to the control signal of the host computer, and at the same time controls the other battery modules of the at least two battery modules to supply power to the bus connection end.

Further, the new power system also includes a load motor module, the load motor module includes two DC power supply terminals, a frequency converter and a motor, and the two bus connection terminals are correspondingly connected to the two DC power supply terminals through the bus bar. The frequency converter converts the DC voltage provided by the two DC power supply terminals into AC power to drive the motor, or converts the AC power fed back by the motor into DC power and supplies it to the two DC power supply terminals.

Further, the new power system also includes a second power supply module and a third power supply module, the second power supply module includes a three-phase input power supply, the third power supply module includes a DC input power supply, the three-phase input power supply and the converter The AC input terminals of the module are connected to supply power to the two bus connection terminals, and the DC input power supply is connected to the DC input terminals of the converter module to supply power to the two bus connection terminals. A diode is connected in series between the anode of the DC input power supply and the bus bar.

Further, the converter module also includes a first rectifier, the first rectifier includes three input ports and two output ports, and the three input ports are connected to the AC input of the converter module terminal, and the two output ports are connected to the two bus connection terminals through a bus bar.

Preferably, the second power supply module further includes a first preset contactor provided between the three-phase input power supply and the output end of the three-phase input power supply, and the third power supply module further includes a contactor between the DC input power supply and the output terminal of the three-phase input power supply. A second preset contactor is provided between the output terminals of the DC input power supply.

Preferably, the converter module further includes a Hall DC current detection device connected in series between the bus bar and an output port of the first rectifier, and the Hall DC current detection device is connected to the host computer.

Preferably, the converter module further includes a low-voltage surge protector, the three input terminals of the low-voltage surge protector are connected to the three input ports of the first rectifier, and the output terminals of the low-voltage surge protector grounded.

Further, the novel power system further includes an auxiliary module, the auxiliary module includes an auxiliary transformer and an auxiliary output interface, and the auxiliary transformer includes a second inverter connected in series from the bus bar.

Preferably, the converter is packaged with a silicon carbide switching tube, and is controlled with a switching frequency of 40K.

In the embodiment of the present invention, the battery management module is used to detect the working parameter information in the storage battery and feed it back to the host computer. The other battery modules of the two battery modules supply power to the load motor module. When the storage battery supplies power to the crane, the power calibration and cell voltage balance can be performed without shutting down the crane.

Description of drawings

Fig. 1 is a circuit diagram of a novel power system in Embodiment 1 of the present invention;

Fig. 2 is the circuit diagram of the converter module of the novel power system in the second embodiment of the present invention;

Fig. 3 is the circuit diagram of the novel power system in the third embodiment of the present invention;

Fig. 4 is a circuit diagram of a converter module of a novel power system in Embodiment 3 of the present invention;

Fig. 5 is a circuit diagram of the load motor module of the new power system in the third embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

Embodiment one

As shown in FIG. 1 , Embodiment 1 of the present invention provides a novel power system, including a first power supply module 100 and a converter module 200 .

Wherein, the first power supply module 100 includes at least two battery modules, and each battery module includes a positive output terminal and a negative output terminal, a storage battery, and a battery management module connected to a host computer, and the storage battery is connected in series between the positive output terminal and the negative output terminal. Between the output terminals, the battery management module is used to detect the working parameters in the storage battery; the converter module 200 includes at least two sets of battery input terminals and two bus connection terminals C1+ and D1-, and each set of battery input terminals includes a positive pole The input terminal and the negative input terminal, the positive input terminal is connected to the positive output terminal of the battery module, the negative input terminal is connected to the negative output terminal of the battery module, the busbar connection terminals C1+ and D1- and each group of batteries A converter is connected in series between the input terminals through a bus bar, and the converter controls one of the at least two battery modules to perform balance correction according to the control signal of the host computer, and at the same time controls the pair of other battery modules of the at least two battery modules The DC power supply terminal supplies power.

In this embodiment, the first power supply module 100 includes three battery modules, namely a battery module B1, a battery module B2 and a battery module B3. The battery module B1 includes a positive output terminal B1+ and a negative output terminal B1-, a battery B11 and a battery management module BMS1 connected to a host computer. The storage battery B11 is connected in series between the positive output terminal B1+ and the negative output terminal B1 −. The battery B11 includes a switch, a power supply and a DC fuse. The battery module B2 includes a positive output terminal B2+ and a negative output terminal B2-, a battery B21, and a battery management module BMS2 connected to a host computer. The battery B21 is connected in series between the positive output terminal B2+ and the negative output terminal B2-, so The storage battery B21 includes a switch, a power supply and a DC fuse. The battery module B3 includes a positive output terminal B3+ and a negative output terminal B3-, a battery B31, and a battery management module BMS3 connected to a host computer. The battery B31 is connected in series between the positive output terminal B3+ and the negative output terminal B3-. The storage battery B31 includes a switch, a power supply and a DC fuse. When the storage battery of any one of the battery modules is damaged or unusable, the storage battery can be disconnected through a switch, and the first power supply module 100 can continue to work normally.

Preferably, the working parameters of the battery include parameters such as current, electricity, temperature and insulation state of the cells in the battery.

Exemplarily, the converter module 200 includes three sets of battery input terminals, and each battery input terminal includes a positive input terminal and a negative input terminal. In this embodiment, the positive input terminal A1+ is connected to the positive output terminal B1+ of the battery module B1, and the negative input terminal The terminal A1- is connected to the negative output terminal B1- of the battery module B1. The positive input terminal A2+ is connected to the positive output terminal B2+ of the battery module B2, and the negative input terminal A2- is connected to the negative output terminal B2- of the battery module B2. The positive input terminal A3+ is connected to the positive output terminal B3+ of the battery module B3, and the negative input terminal A3- is connected to the negative output terminal B3- of the battery module B3. There is a converter DC/DC1 in series between the busbar connection terminals C1+ and D1- and the battery input terminals A1+ and A1-; there is a converter DC/DC1 in series between the busbar connection terminals C1+ and D1- and the battery input terminals A2+ and A2- DC2; a converter DC/DC3 is connected in series between the bus connection terminals C1+ and D1- and the battery input terminals A3+ and A3-.

Exemplarily, the converter automatically adjusts and adjusts the discharge current according to the voltage of the busbar, and the host computer limits and regulates the microprocessor MPU of each converter through a total microprocessor MPU in the converter module 200 The highest or lowest voltage, the microprocessor MPU is connected with each transistor in the converter.

When the battery management modules BMS1, BMS2 and BMS3 of the three battery modules receive the instructions from the host computer and detect the power, current, temperature and insulation status of the cells in the battery, they transmit the information to the host computer, and the host computer communicates with the converter module. The microprocessor MPU in the 200 miles sends a balance correction command, and the converter DC/DC1 receives the balance correction command from the microprocessor MPU, and the converter DC/DC1 starts to automatically adjust its discharge voltage, so that the battery B11 is adjusted. Balance correction, while the converters DC/DC2 and DC/DC3 make the battery B21 and battery B31 perform normal discharge. When the balance calibration of battery B11 is completed, battery B21 performs balance calibration, and at the same time, battery B11 and battery B31 perform normal discharge. In the embodiment of the present invention, the battery management module detects information such as battery power and cell voltage and feeds it back to the host computer, and the host computer sends a signal to the converter to control one of the three battery modules to perform balance correction, while the other two The normal discharge of the battery module achieves the effect of battery power correction and cell voltage balance without stopping the battery when the battery is powered. Therefore, because the battery can always perform balance correction, its service life and utilization rate are improved. The categories have also expanded accordingly.

Embodiment two

As shown in FIG. 2 , the second embodiment of the present invention is a further improvement of the present invention on the basis of the converter module in the first embodiment.

In this embodiment, the converter module 200 further includes a first rectifier AC/DC, and the first rectifier AC/DC includes three input ports and two output ports, and the three input ports are connected to the The AC input terminals R1, S1, and T1 of the converter module 200, the two output ports are connected to the two bus connection terminals C1+ and D1- through the bus bar, and the two output ports are rectified and connected to DC by the diode G1. The input terminals C1 and D1 are connected.

Exemplarily, the converter module 200 further includes the pre-charging circuit A0 serially connected in series between the bus bar and an output port of the first rectifier AC/DC.

Preferably, the converter module 200 also includes a second inverter DC/AC and a sine wave filter LC serially connected in series from the bus bar, and the sine wave filter LC and the auxiliary converter module 200 The output ports U1, V1, and W1 are connected to each other.

As a preference, DC reactors L1, L2, L3 and pre-charging circuits A1, A2, A3 are also connected in series on the converters DC/DC1, DC/DC2, and DC/DC3 and the positive poles A1+, A2+, and A3+ respectively. The converter is used to limit the AC component superimposed on the DC current to a specified value, keep the rectified current continuous, reduce the current ripple value, improve the input power factor, and suppress the harmonics generated by the converter device. The pre-charging circuit is used for Limit the effect on the charging current of the capacitor at the moment when the power is turned on, so as to protect the components of the rectifier AC/DC from being damaged by the instantaneous short-circuit current of the capacitor.

Preferably, the converter DC/DC is packaged with a silicon carbide switch tube, and is controlled by a 40kHz switching frequency, that is, the pulse width modulation of the power supply controls the chip driving pulse operating frequency to 40kHz, so that the switching loss is set to be small and the wiring The requirements are low, and the good semiconductor material silicon carbide is used as the switch tube package, which can resist oxidation at high temperature, and the current fluctuation is small, and the weight and volume required by the DC reactor are reduced, so the DC reactor can be installed in the converter module.

The converter module 200 in this embodiment includes a first rectifier AC/DC, a second inverter DC/AC, three converters DC/DC1, DC/DC2 and DC/DC3 and other necessary components to realize It not only provides battery pack power supply, but also performs balance correction. It also provides DC and AC power input ports to ensure the stability of power supply. In addition, the converter DC/DC is packaged with silicon carbide switching tubes, 40kHz switching frequency control, DC reactor The required weight and volume are reduced, enabling the incorporation of a DC reactor.

Embodiment three

As shown in Fig. 3, Fig. 4 and Fig. 5, Embodiment 3 of the present invention is a further improvement on the basis of Embodiment 1. Fig. 3 is a new power system provided by the embodiment of the present invention, and Fig. 4 is a diagram 3 provides a specific circuit diagram of a converter of a new power system, and FIG. 5 is a circuit diagram of a load motor module of a new power system provided in FIG. 3 .

In this embodiment, the new power system also includes a load motor module 300, including two DC power supply terminals C+ and D-, an inverter INV and a motor M, and the two bus connection terminals C1+ and D1- are connected to two Two DC power supply terminals C+ and D-, the inverter INV converts the DC voltage provided by the two DC power supply terminals C+ and D- into AC power to drive the motor M, or converts the feedback AC power of the motor M Provide direct current to the two direct current power supply terminals C+ and D−.

Exemplarily, the motor M may be a motor used in various fields such as cranes and automobiles, and the lifting motor M is used in this embodiment.

Preferably, the microprocessor MPU is connected to each triode in the inverter DC/AC, and another host computer of the load motor module controls the inverter INV through the microprocessor MPU to adjust the flow direction and frequency of the current, and the inverter INV converts the DC voltage provided by the two DC power supply terminals C+ and D- into AC power to drive the lifting motor M and control its speed, or converts the feedback AC energy of the lifting motor M into DC power to the Describe the two DC power supply terminals C+ and D-. Wherein, the inverter DC/AC of the inverter INV is connected in series with the three-phase inlets U1, V1, and W1 of the hoisting motor M.

Exemplarily, when the crane lifts heavy objects, the battery B11, the battery B21 and the battery B31 jointly provide energy to the hoisting motor M, and the three converters adjust the discharge current in real time so that the discharge loads of the three battery modules are basically the same; then The busbar is connected to the two DC power supply terminals C+ and D- of the inverter INV through the two busbar connection terminals C1+ and D1-, and the inverter DC/AC in the inverter INV automatically adjusts the voltage and frequency of the output power supply, according to the lifting The actual needs of the motor M are to provide the required power supply voltage, and the DC voltage provided by the two DC power supply terminals is converted into AC power to drive the lifting motor M.

Further, the new power system also includes a second power supply module 400, the second power supply module 400 includes a three-phase input power supply, the output terminal R interface of the three-phase input power supply and the AC input terminal R1 interface of the converter module 200 The S interface of the output end of the three-phase input power supply is connected to the S1 interface of the AC input end of the converter module 200, and the T interface of the output end of the three-phase input power supply is connected to the AC input end S1 interface of the converter module 200. The input terminal T1 interface is connected to supply power to the two busbar connection terminals C1+ and D1-, and the second power supply module also includes a three-phase input power supply and a three-phase input power supply output terminal R, S, and T interface. There is a first preset contactor - KM1, used for pre-charging and low voltage release protection.

Preferably, the converter module 200 further includes a PE1 interface, which is connected to the PE interface of the second power supply module 400, and the PE interface is grounded, which is used for protection in case of leakage of the converter case.

Further, the new power system also includes a third power supply module 500, the third power supply module 500 includes a DC input power supply, the output terminals D0 and CO of the DC input power supply and the DC input terminals D1 and C1 of the converter module 200 The connection is used to supply power to the two bus connection terminals C1+ and D1-, the positive pole P+ of the DC input power supply is connected to the C0 interface of the DC input terminal, the C0 interface of the DC input terminal is connected to the C1 interface of the converter module 200, and the DC input The negative pole N− of the power supply is connected to the D0 interface of the DC input end, and the D0 interface of the DC input end is connected to the D1 interface of the converter module 200 . A diode G1 for rectification is connected in series between the positive pole P+ of the DC input power supply and the DC power supply terminal D- through a bus bar. There is a second preset contactor-KM2 in between, which is used for pre-charging and low-voltage release protection.

Further, the novel power system also includes an auxiliary module 600 . The auxiliary module 600 includes an auxiliary transformer and an auxiliary output interface. The auxiliary output interface includes air-conditioning interfaces L1, L2, lighting system interface L3, and neutral line N correspondingly connected from the secondary wire ends of the auxiliary transformer. The input terminals U, V of the auxiliary module , W are correspondingly connected with the primary wire ends of the auxiliary transformer, the U interface of the auxiliary module input end is connected with the U1 interface of the converter module 200; the V interface of the auxiliary module input end is connected with the V1 interface of the converter module 200; the auxiliary module input The W interface of the terminal is connected to the W1 interface of the converter module 200 .

Further, the converter module 200 also includes a first rectifier AC/DC, the first rectifier AC/DC includes three input ports and two output ports, and the three input ports are connected to the converter The AC input ports R1, S1, and T1 of the inverter module 200, and the two output ports are connected to the two bus bar connection ends C1+ and D1- through a bus bar.

Preferably, the converter module 200 further includes a low-voltage surge protector F0, the three input terminals of the low-voltage surge protector F0 are connected to the three input ports of the first rectifier, and the low-voltage surge protector F0 is connected to the three input ports of the first rectifier. The output terminal of the surge protector F0 is grounded.

Preferably, the converter module 200 further includes the pre-charging circuit A0, the Hall DC current detection device T1 and the first A preset DC fuse F1.

Further, the novel power system further includes an auxiliary module, the auxiliary module includes an auxiliary transformer and an auxiliary output interface, and the auxiliary transformer includes a second inverter DC/AC connected in series from the bus bar.

Preferably, the converter module 200 includes a second preset DC fuse F2, a second inverter DC/AC, a sine wave filter LC, and a sine wave filter LC and The auxiliary output ends U1 , V1 , and W1 of the converter module 200 are connected through interfaces.

Preferably, the converter DC/DC is packaged with a silicon carbide switch tube, and is controlled by a 40kHz switching frequency, that is, the pulse width modulation of the power supply controls the chip driving pulse operating frequency to 40kHz, so that the switching loss is set to be small and the wiring The requirements are low, and the good semiconductor material silicon carbide is used as the switch tube package, which can resist oxidation at high temperature and has small current fluctuations, so the DC reactor can be installed in the converter module.

Preferably, the converters DC/DC1, DC/DC2, DC/DC3 and the second inverter DC/AC are all connected with a microprocessor MPU, and these microprocessors MPU and the Hall DC current detection device T1 are all connected To a total microprocessor MPU in the converter module 200 and receive the control of the total microprocessor MPU of the converter module 200, the frequency converter INV is also connected with a microprocessor MPU, the microprocessor MPU is connected with the load motor module 300 is connected to another host computer and receives the control of the host computer.

Optionally, as shown in FIG. 5 , the load motor module 300 may include multiple load motors, that is, a cart motor M2 and a trolley motor M3 may be connected in parallel on the bus. The cart motor M2 is connected in series with an inverter INV2, and the trolley motor M3 Inverter INV3 is connected in series, the inverter DC/AC2 of inverter INV2 is connected in series with the three-phase inlets U2, V2, and W2 of cart motor M2, the inverter DC/AC3 of inverter INV3 is connected to the three-phase connection of trolley motor M3 The phase inlets U3, V3, and W3 are connected in series, and the power supply mode of the cart motor M2 and trolley motor M3 and the adjustment mode of the frequency converter are the same as the lifting motor M in the above-mentioned embodiment.

Exemplarily, when the crane lifts heavy objects, the external power supply together with the battery B1, the battery B2 and the battery B3 provides energy to the crane. Among them, the external power supply can be the power provided by the small diesel engine group connected to the three-phase input power supply; or the power provided by the mains sliding contact AC power supply connected to the three-phase input power supply; or the mains sliding contact DC power supply Power provided by the DC input power supply. The microprocessor MPU adjusts the discharge current in real time according to the change of the bus voltage, so that the discharge load of the three battery modules is basically the same, and at the same time ensures that the external power supply is not overloaded; then the bus is connected to the inverter through the two bus connection terminals C1+ and D1- The two DC power supply terminals C+ and D- of INV, the inverter INV adjusts the voltage and frequency of the output power supply, and provides the required power supply power according to the actual needs of the lifting motor M, and connects the two DC power supply terminals C+ and D- The provided DC voltage is converted into AC to drive the lifting motor M.

When the crane is on standby, the small diesel generator continues to run. The electric energy provided at this time will charge the batteries B1, B2 and B3 of the three battery modules. The three converters automatically adjust the charging current in real time to make the three battery modules The charging load is basically the same.

Exemplarily, when a crane lifts a heavy object, the Hall DC current detection device T1 detects the output load current of the second power supply module 400 and the third power supply module 500, and the discharge current of the three storage batteries B11, B21 and B31, and the data Transmission to the host computer, the three converters automatically adjust the discharge current of the first power supply module 100 in real time and limit the input power of the power supply of the second power supply module 400 and the third power supply module 500, so that the discharge of the three batteries B11, B21 and B31 The load is basically the same, while ensuring that the external power supply is not overloaded.

Preferably, the positive poles B1+, B2+ and B3+ between the converters DC/DC1, DC/DC2 and DC/DC3 in each battery module B1, B2 and B3 and the batteries B11, B21 and B31 are connected in series respectively. DC reactors L1, L2, L3 and pre-charging circuits A1, A2, A3, DC reactors are used to limit the AC component superimposed on the DC current to a specified value, keep the rectified current continuous, reduce the current ripple value, and improve The input power factor can suppress the harmonics generated by the converter device; DC fuses are also connected in series on the positive poles of the converters between the busbar and the converters DC/DC1, DC/DC2 and DC/DC3 in each battery module devices F3, F4 and F5.

Exemplarily, the pre-charging circuit is used to limit the effect on the charging current of the capacitor at the moment when the power is turned on, so as to protect the components of the rectifier AC/DC from being damaged by the instantaneous short-circuit current of the capacitor, and the DC fuse is used to protect the circuit when the current is too large .

Exemplarily, the electric energy provided by the first power supply module 100, the second power supply module 400 and the third power supply module 500 and the electric energy fed back by the load motor module 300 can all provide electric energy for the auxiliary module 600. During normal operation, the first power supply module 100. The electric energy provided by the second power supply module 400 and the third power supply module 500 supplies power to the auxiliary module 600, and when the load motor module 300 feeds back the electric energy, the microprocessor MPU of another upper computer connected to the load motor module 300 controls the current feedback. Direction, the inverter DC/AC and the converter automatically adjust the voltage of the electric energy provided by the first power supply module 100, the second power supply module 400 and the third power supply module 500 and the voltage of the electric energy fed back by the load motor module 300, so that Together they provide power to the auxiliary module 600 .

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (9)

1. A novel power system, characterized in that it comprises: The first power supply module includes at least two battery modules, each battery module includes a positive output terminal and a negative output terminal, a storage battery, and a battery management module connected to a host computer, and the storage battery is connected in series to the positive output terminal and the negative output terminal Between, the battery management module is used to detect the working parameters of the storage battery; The converter module includes at least two sets of battery input terminals and two bus connection terminals, each set of battery input terminals includes a positive input terminal and a negative input terminal, and the positive input terminal is connected to the positive output terminal of the battery module. The negative input terminal is connected to the negative output terminal of the battery module, and a converter is connected in series between the bus connection terminal and the input terminal of each set of batteries, and the converter controls the at least two One of the battery modules performs balance correction based on the working parameters, and at the same time controls the other battery modules of the at least two battery modules to supply power to the bus connection end. 2. A new type of power system according to claim 1, characterized in that it also includes a load motor module, the load motor module includes two DC power supply terminals, a frequency converter and a motor, and the two bus connection terminals pass through The bus bar is correspondingly connected to the two DC power supply terminals, and the frequency converter converts the DC voltage provided by the two DC power supply terminals into AC power to drive the motor, or converts the feedback AC energy of the motor into DC power Provided to the two DC power supply terminals. 3. A novel power system according to claim 1, further comprising a second power supply module and a third power supply module, the second power supply module includes a three-phase input power supply, and the third power supply module includes a DC input power supply, The three-phase input power supply is connected to the AC input terminal of the converter module for supplying power to the two bus connection terminals, and the DC input power supply is connected to the DC input terminal of the converter module for In order to supply power to the connecting ends of the two busbars, a diode is connected in series between the anode of the DC input power supply and the busbars. 4. A novel power system according to claim 3, wherein the converter module further comprises a first rectifier, the first rectifier comprises three input ports and two output ports, the The three input ports are connected to the AC input ends of the converter module, and the two output ports are connected to the two bus bar connection ends through bus bars. 5. A novel power system according to claim 3, wherein the second power supply module further comprises a first preset contactor provided between the three-phase input power supply and the output end of the three-phase input power supply , the third power supply module further includes a second preset contactor provided between the DC input power supply and the output end of the DC input power supply. 6. A novel power system according to claim 3, characterized in that the converter module further comprises a Hall DC current detection device connected in series between the bus bar and an output port of the first rectifier , the Hall DC current detection device is connected to the host computer. 7. A new type of power system according to claim 3, wherein the converter module further includes a low-voltage surge protector, and the three input terminals of the low-voltage surge protector are connected to the first The three input ports of the rectifier, and the output end of the low-voltage surge protector are grounded. 8. A novel power system according to claim 1, further comprising an auxiliary module, the auxiliary module includes an auxiliary transformer and an auxiliary output interface, and the auxiliary transformer includes a second inverter connected in series from the bus bar Transformer. 9. A new type of power system according to claim 1, characterized in that the converter is packaged with a silicon carbide switching tube and controlled with a switching frequency of 40 kHz.