Redundant drive control device and method of power module

Abstract

The invention belongs to the field of flexible direct-current transmission converter valves, and discloses a redundant drive control device and method for a power module, and the device comprises at least two drive units of the same structure. Each driving unit respectively controls the body IGBT and performs redundancy control on other IGBTs through the main control channel and the redundancy control channel, and supplies power to the driving unit and performs redundancy power supply on other driving units through the energy-taking power supply unit; an electronic isolation switch arranged on the redundancy control channel can realize on-off of redundancy control of other IGBTs; the other IGBTs are the IGBTs in the same power module or the IGBTs in adjacent power modules; by adopting the control structure, redundancy control and power supply between the driving units are realized, so that the risk of system instability caused by a secondary board card fault is effectively reduced; by adopting the driving control device, the types and the number of secondary board cards of the power module of the flexible direct current converter valve can be greatly reduced while the power module keeps stable operation, and the overall stability and the reliability of a system are improved.

Description

Technical Field

[0001] The present invention belongs to the field of flexible direct current transmission converter valves, and specifically relates to the field of power module control, and in particular to a redundant drive control device and method for a power module. Background Art

[0002] Flexible DC transmission technology has flexible control and superior performance. It does not require AC system support for commutation and has dynamic reactive power support capability. It can effectively suppress AC voltage fluctuations and reduce the impact of power fluctuations on the receiving power grid. It is one of the core power electronics technologies supporting the construction of new power systems. It can directly connect wind power, photovoltaics, and pumped storage to load centers. Through multi-source access and multi-energy complementarity, it can smooth out the volatility and intermittency of renewable energy generation over a large range, reduce its impact on the power grid, achieve large-scale flow regulation and control, and improve the reliability of renewable energy generation.

[0003] At present, the flexible DC transmission converter valves with voltage levels of ±500kV and above are composed of thousands of power modules. In the early stage of equipment operation, the annual failure rate of the power modules is generally at the level of 1%. The main failure object is the secondary board of the power module. In order to control the power module to keep it running stably, it is necessary to assemble a large number of secondary boards on the power module to form a controller of the power module; the secondary boards mainly include the central control board, IGBT driver board, bypass switch trigger board, high-level energy supply, status monitoring board, etc.; as the equipment serves to the middle and late stages of its life, the failure rate of the secondary boards will increase significantly in the form of a bathtub curve, seriously affecting the stability of the flexible DC transmission system and increasing the equipment maintenance cost.

[0004] It can be seen that the controller of the existing power module involves a large number of types and quantities of secondary boards, with a complex structure and low fault tolerance, which affects the stability of the flexible DC transmission system. Summary of the invention

[0005] The present invention provides a redundant drive control device and method for a power module to solve the technical problem that the controller of the existing power module involves a large number and type of secondary boards, has a complex structure and low fault tolerance, which affects the stability of the flexible direct current transmission system.

[0006] In order to achieve the above object, the present invention adopts the following technical contents: In a first aspect, the present invention provides a redundant drive control device for a power module, comprising at least two drive units with the same structure; The drive unit includes a main control channel for controlling the main IGBT, a redundant control channel for controlling other IGBTs, and an energy-taking power supply unit; The redundant control channel is provided with an electronic isolating switch, and the electronic isolating switch is used to control the opening and closing of the redundant control channel to realize redundant control of other IGBTs; The energy-taking power supply unit is used to supply power to the drive unit corresponding to the main IGBT and to supply power to the drive units corresponding to other IGBTs; The other IGBTs include IGBTs in the same power module or IGBTs in adjacent power modules.

[0007] Further, the two driving units are respectively a first driving unit and a second driving unit, wherein the first driving unit controls the first IGBT through a first main control channel and controls the second IGBT through a first redundant control channel; The second driving unit controls the second IGBT through the second main control channel, and controls the first IGBT through the second redundant control channel; A master-slave rotation control strategy is adopted between the first drive unit and the second drive unit.

[0008] Furthermore, the first drive unit and the second drive unit of the same power module perform cross communication and cross power supply, and are interactively connected to the valve control system device respectively.

[0009] Further, Cross-communication is performed between a first drive unit and a second drive unit of a same power module; Between two adjacent power modules, the two first drive units are connected through a power supply line, and the two second drive units are connected through a power supply line; the corresponding two first drive units are interactively connected to a valve control system device respectively, and the two second drive units are interactively connected to each other; or, the corresponding two second drive units are interactively connected to a valve control system device respectively, and the two first drive units are interactively connected to each other.

[0010] Furthermore, the power module includes a single physical DC support capacitor or a plurality of physical DC support capacitors connected in parallel.

[0011] Furthermore, the physical entity DC support capacitor includes at least two sub-capacitors connected in series.

[0012] Furthermore, each sub-capacitor is connected in parallel with a voltage-dividing resistor, and the voltage-dividing resistor is connected to the energy-taking power supply unit.

[0013] Furthermore, the driving unit further comprises an FPGA, and the FPGA is connected to the main IGBT via a main control channel and connected to other IGBTs via a redundant control channel.

[0014] Furthermore, a voltage detection module is connected between the FPGA and the energy extraction power supply unit for detecting the capacitor voltage of the power module.

[0015] In a second aspect, the present invention provides a redundant drive control method for a power module, based on the redundant drive control device for the power module, comprising: When the drive units are all in normal state, each drive unit controls the corresponding main IGBT through its own main control channel; the electronic isolation switch on the corresponding redundant control channel is in a locked and blocked state; wherein the energy-taking power supply unit supplies power to the drive units of the corresponding main IGBT; When a drive unit in the same power module fails, the drive unit in normal state controls the corresponding main body IGBT through the main control channel, the electronic isolation switch on the corresponding redundant control channel is closed, and the IGBT corresponding to the failed drive unit is controlled through the redundant control channel; the energy-taking power supply unit supplies power to the drive unit corresponding to the main body IGBT, and at the same time provides redundant power supply to the failed drive unit; Alternatively, when a drive unit corresponding to one of two adjacent power modules fails, the drive unit in a normal state controls the corresponding main body IGBT through the main control channel, and the electronic isolation switch on the corresponding redundant control channel is closed. The drive unit of the power module in a normal state controls the IGBT corresponding to the drive unit of the adjacent power module that has failed through the redundant control channel, and the energy supply unit supplies power to the drive unit corresponding to the main body IGBT, and at the same time provides redundant power to the drive unit of the adjacent power module that has failed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a redundant drive control device for a power module, the drive control device comprises at least two drive units with the same structure; each drive unit realizes the control of the main IGBT and the redundant control of other IGBTs respectively through a main control channel and a redundant control channel, and supplies power to the drive unit itself and to other drive units through an energy-taking power supply unit; the electronic isolating switch arranged on the redundant control channel can realize the disconnection of the redundant control of other IGBTs, thereby enhancing the fault tolerance of the system; other IGBTs include IGBTs in the same power module or IGBTs in adjacent power modules, which can realize cross-communication and power supply between different drive units under the same power module, or realize cross-communication and power supply between different drive units under adjacent power modules; thereby effectively reducing the risk of system instability caused by secondary board failure; the use of the drive control device can make the power module maintain stable operation while greatly reducing the types and quantity of secondary boards of the flexible direct current converter valve power module; the structure is simple and the fault tolerance is high, which reduces the equipment maintenance cost and improves the overall stability and reliability of the flexible direct current transmission system.

[0017] Preferably, in the present invention, by adopting the first drive unit and the second drive unit and implementing a master-slave rotation control strategy, mutual backup and load balancing between the two drive units are achieved; this further enhances the stability and reliability of the system. Even if one drive unit fails, the other drive unit can take over the control task to ensure the normal operation of the IGBT.

[0018] Further preferably, in the present invention, cross-communication and cross-power supply are carried out between the two drive units of the same power module, and they are interactively connected with the valve control system device, thereby improving the information flow and coordination within the system; this design enables the system to respond to faults more quickly and take corresponding redundant measures, thereby improving the overall performance and reliability of the system.

[0019] Further preferably, in the present invention, by realizing cross-communication and connection of drive units within the same power module and between adjacent power modules, the redundancy and flexibility within the system are enhanced; this design enables the system to more flexibly adjust the control strategy when facing a fault, thereby ensuring the stable operation of the system.

[0020] Preferably, in the present invention, the power module is designed to include a single or multiple physical DC support capacitors connected in parallel, thereby improving the energy storage capacity and stability of the system; this design enables the system to better cope with voltage fluctuations and load changes, thereby ensuring the normal operation of the IGBT.

[0021] Further preferably, in the present invention, the physical entity DC support capacitor is designed to include at least two sub-capacitors connected in series, thereby improving the reliability and life of the capacitor; this design enables the capacitor to better protect itself and the IGBT when facing faults such as overvoltage or short circuit, thereby ensuring the safe operation of the system.

[0022] Further preferably, in the present invention, a voltage-dividing resistor is connected in parallel to each sub-capacitor and is connected to an energy-taking power supply unit, thereby achieving precise control and protection of the capacitor voltage; this design enables the system to more accurately monitor the voltage state of the capacitor and take protective measures when necessary to prevent the capacitor from being damaged or causing failures.

[0023] Preferably, in the present invention, an FPGA is introduced into the drive unit and connected to the IGBT through a main control channel and a redundant control channel, thereby improving the control accuracy and response speed of the system; the powerful processing capability of the FPGA enables the system to process control signals and fault information more quickly, thereby improving the overall performance and reliability of the system.

[0024] Further preferably, in the present invention, a voltage detection module is connected between the FPGA and the energy extraction power supply unit to realize real-time monitoring of the output power supply voltage; this design enables the system to promptly detect abnormal changes in the power supply voltage and take corresponding measures to protect the IGBT and the entire system, thereby improving the safety and stability of the system.

[0025] The present invention also provides a redundant drive control method for a power module. Based on the redundant drive control device of the power module, under normal operating conditions, each drive unit controls the corresponding main body IGBT through its own main control channel, the electronic isolating switch on the redundant control channel is in a locked and blocked state, and the energy supply unit supplies power to the corresponding main body IGBT; if a certain drive unit fails, the drive unit in a normal state will immediately take over the control of the IGBT corresponding to the failed drive unit, and realize the control through the redundant control channel to ensure that the energy supply unit provides redundant power supply for the failed drive unit; the method also considers the redundant power supply strategy between adjacent power modules. When one of the power module drive units fails, the drive unit of the power module in a normal state redundantly controls the IGBT corresponding to the failed drive unit of the adjacent power module, and the energy supply unit can provide redundant power supply for the failed drive unit; the redundant drive control method significantly improves the fault tolerance and reliability of the system, reduces the risk of system instability caused by secondary board failure, thereby effectively extending the service life of the equipment, reducing the equipment maintenance cost, and providing a strong guarantee for the stable operation of the flexible direct current transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A schematic diagram of a redundant drive control device for a power module provided by an embodiment of the present invention; Figure 2 A wiring diagram of a single capacitor half-bridge power module provided by an embodiment of the present invention; Figure 3 A wiring diagram of a dual-capacitor half-bridge power module provided by an embodiment of the present invention; Figure 4 A wiring diagram of a drive unit and an IGBT provided in an embodiment of the present invention; Figure 5 A single-module redundant power supply and cross-communication wiring diagram of a redundant drive control device for a power module provided by an embodiment of the present invention; Figure 6 A wiring diagram of redundant power supply and cross communication of adjacent modules of a redundant drive control device for a power module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] As mentioned in the background technology, the flexible DC transmission converter valve with voltage level of ±500kV and above is composed of thousands of power modules. In the early stage of equipment operation, the annual failure rate of the power module is generally at the level of 1%. The main fault object is the secondary board of the power module. In order to control the power module to keep it running stably, it is necessary to assemble a large number of secondary boards on the power module to form the controller of the power module; the secondary board mainly includes the central control board, IGBT driver board, bypass switch trigger board, high-level energy supply, status monitoring board, etc.; as the equipment serves to the middle and late stages of its life, the failure rate of the secondary board will increase significantly in the form of a bathtub curve, which seriously affects the stability of the flexible DC transmission system and increases the equipment maintenance cost. Therefore, it is urgent to carry out intensive and fault-tolerant power module secondary board technology research to improve equipment reliability.

[0032] In order to solve the above problems, this embodiment provides a redundant drive control device for a power module. The redundant drive control device can greatly reduce the types and quantities of secondary boards of the flexible DC converter valve power module while ensuring the power module, and realize the intensive and high fault-tolerant design of power module drive control, so as to improve the reliability of the flexible DC converter valve throughout its life cycle and greatly reduce the operation and maintenance cost of the equipment.

[0033] The following is for Figures 1 to 6 The symbols and technical abbreviations involved are explained as follows: IN1, IN2: driver board signal input optical port; IN means input terminal; OUT1, OUT2: driver board signal feedback optical port; OUT means output end; FPGA: Programmable logic gate control chip; FPGA (Field-Programmable Gate Array) is a semi-custom integrated circuit composed of an array of logic cells; CH1, CH2: IGBT monitoring control circuit (control channel); CH (Channel) refers to the channel, which is used to indicate the connection between objects or structures and to transmit information such as signals; IGBT (Insulated Gate Bipolar Transistor) is a composite fully controlled voltage-driven power semiconductor device.

[0034] Gsw: electronic isolating switch; Gsw (Gate switch) is the driving gate isolating switch; C, G, E: the collector, gate, and emitter terminals of the IGBT. Cbak, Gbak, Ebak: are the redundant connection terminals for the collector, gate, and emitter of the IGBT respectively; bak (Backup) means backup; PSU, PSU1, PSU2: DC / DC conversion high-voltage energy-taking power supply unit; PSU (Power Supply Unit) is the power supply unit; Vmid, GND: input terminals of the energy-taking power supply unit; Vmid (Voltage Midpoint) is the voltage midpoint; GND (Ground) refers to the ground wire, also called the ground wire; Vout, COM: output terminals of the energy-taking power supply unit; Vout (Output Voltage) indicates the output voltage; COM (Common) is the common terminal or common ground; Vin-bak, Vout-bak: redundant power supply input and output terminals respectively; Vin-bak (Input Voltage-Backup) indicates input backup; Vout-bak (Output Voltage-Backup) indicates output backup; IGBT1, IGBT2: upper IGBT and lower IGBT of half-bridge power module respectively; C1, C2 (or C11, C12, or C21, C22): two series sub-capacitors inside a single physical capacitor; C represents capacitance; R1, R2 (or R11, R12, or R21, R22): two series sub-capacitors and voltage-dividing resistors inside a single physical capacitor; R represents resistance; Driver1, Driver2: IGBT driver unit; Driver means driver unit; SM: power module; SM (Submodule) means submodule; SMn, SMn+1: two adjacent power modules; VBE: Valve Base Electronics (VBE) is a valve control system.

[0035] like Figure 1 and Figure 4 As shown, this embodiment provides a redundant drive control device for a power module, including an energy supply unit and two drive units with the same structure; it should be noted that, in this embodiment, two drive units are taken as an example, and the drive units can also be set to 3, 4 or more drive units according to actual product requirements; The two drive units of the IGBT of the power module are respectively configured with two drive control channels (CH1, CH2), one main control channel CH1 controls the main IGBT, and the other redundant control channel CH2 serves as a redundant control unit for other IGBTs; An electronic isolating switch Gsw is connected in series between the IGBT redundant control channel and the collector, gate and emitter external terminals of the IGBT. When the redundant control channel is in a standby state, the electronic isolating switch Gsw is in a locked and blocked state.

[0036] Another example Figure 1 As shown, in this embodiment, the drive unit is configured with a power supply unit PSU with redundant outputs, and the upper and lower tube drive units (Driver1, Driver2) inside the power module can be redundantly powered. One output power supply is used to power the main IGBT drive unit, and the other output power supply is used to redundantly power the opposite tube IGBT drive unit; or redundant power supply can be used between adjacent power modules.

[0037] In this embodiment, the IGBT drive unit of the power module is configured with two control signal input and output channels, and cross communication can be adopted between the upper and lower tube drive units inside the power module, both drive units are connected to the valve control system device, and master-slave rotation control is adopted between the drive units; or cross communication can be adopted between adjacent power modules, the two power modules adopt master-standby control, a drive unit inside the power module is connected to the valve control system device, and master-slave control is adopted between the drive units inside the power module.

[0038] In this embodiment, Figure 2 and Figure 3 As shown, the power module can use a single or multiple parallel physical DC support capacitors.

[0039] Specific as Figure 2 As shown, a single physical entity DC support capacitor is composed of multiple sub-capacitors connected in series.

[0040] Combination Figure 2 and Figure 3 As shown, a voltage-dividing resistor is connected in parallel at both ends of each sub-capacitor, and the input of the energy-taking power supply unit is connected to the voltage-dividing resistor, thereby achieving precise control and protection of the capacitor voltage.

[0041] In this embodiment, when the upper and lower tube driving units inside the power module adopt cross communication, the master-slave control mode is switched at a fixed period when the power module is in the cut-off state.

[0042] like Figure 5 and Figure 6 As shown, the upper and lower tube drive units (the first drive unit and the second drive unit) inside the power module feed back the working status to each other and transmit it to the valve control system device synchronously.

[0043] like Figure 5 As shown, the first drive unit and the second drive unit of the same power module perform cross communication; the first drive unit and the second drive unit are also connected via a power supply line to achieve cross power supply.

[0044] For example, in the same power module SM1, if a fault occurs in the first drive unit and the second drive unit works normally, the second drive unit performs redundant control of the IGBT corresponding to the first drive unit through its own redundant control channel; at this time, the redundant control channel corresponding to the second drive unit is in a pass state, and the electronic isolation switch is closed; and the energy supply unit corresponding to the second drive unit provides redundant power supply to the first drive unit; thereby realizing cross-communication and cross-power supply between the two drive units of the same power module.

[0045] like Figure 6 As shown, between two adjacent power modules, the two first drive units are connected through a power supply line, and the two second drive units are connected through a power supply line; the corresponding two first drive units are interactively connected to the valve control system device, and the two second drive units are interactively connected to each other; or, the corresponding two second drive units are interactively connected to the valve control system device, and the two first drive units are interactively connected to each other.

[0046] In this embodiment, the two first drive units of two adjacent power modules are connected through a power supply line, the two second drive units are connected through a power supply line, and the two second drive units are respectively connected to the valve control system device through a communication line; the two first drive units are connected through a communication line.

[0047] For example, between two adjacent power modules, if a fault occurs in the first drive unit in the second power module SM2, and the first drive unit in the first power module SM1 adjacent to the second power module SM2 operates normally, the first drive unit of the first power module SM1 performs redundant control of the IGBT corresponding to the first drive unit in the second power module SM2 through its own redundant control channel; at this time, the redundant control channel corresponding to the first drive unit of the first power module SM1 is in a pass state, and the electronic isolation switch is closed; and the energy supply unit corresponding to the first drive unit of the first power module SM1 provides redundant power supply to the first drive unit in the second power module SM2; thereby realizing cross-communication and cross-power supply of each drive unit between the two adjacent power modules.

[0048] It can be seen that this embodiment provides a redundant drive control device for a power module, which can greatly reduce the types and quantity of secondary boards of the flexible DC converter valve power module and reduce the primary construction cost of the equipment; at the same time, by improving the reliability of the flexible DC converter valve throughout its life cycle, it will greatly reduce the operation and maintenance cost of the equipment.

[0049] Combination Figure 1 and Figure 4 As shown, this embodiment provides a redundant drive control device for a power module, and the working principle is as follows: When both drive units inside the power module are in normal state, the drive units control the corresponding connected IGBT through their respective main control channels CH1; When one of the two drive units inside the power module is in a faulty state, the normal drive unit switches to the main control mode, controlling the main IGBT through the CH1 channel and the pair IGBT through the CH2 channel.

[0050] In this embodiment, when adjacent power modules adopt cross communication, when one of the power modules fails, the normal power module monitors the failed power module through the backup communication channel (redundant control channel); Adjacent power modules feed back each other’s working status and transmit it to the valve control system device synchronously; When the two drive units inside the power module are both in a normal state, the drive units control the corresponding connected IGBTs through their respective main control channels.

[0051] In summary, the present invention provides a redundant drive control device and method for a power module, which has the following advantages over the existing drive controller of the power module: The present invention achieves high redundancy and reliability by designing two drive units with the same structure; each drive unit not only includes a main control channel for controlling the main IGBT, but also adds a redundant control channel for controlling other IGBTs, and is equipped with an electronic isolating switch to flexibly control the opening and closing of the IGBT, effectively improving the fault tolerance of the system; at the same time, the design of the energy-taking power supply unit enables it to supply power to the drive unit corresponding to the main IGBT and the drive unit corresponding to other IGBTs respectively, and also to realize redundant power supply between adjacent power modules when necessary, further enhancing the stability and continuity of the entire system. The use of this drive control device significantly improves the operating efficiency and safety of the power module under complex working conditions, and reduces the risk of overall system failure caused by a single fault point; it can be seen that the use of this drive control device can keep the power module running stably while greatly reducing the types and number of secondary boards of the flexible direct current converter valve power module; the structure is simple and the fault tolerance is high, which reduces the equipment maintenance cost and improves the overall stability and reliability of the flexible direct current transmission system.

[0052] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A redundant drive control device for a power module, characterized in that: comprising at least two drive units of the same structure; The drive unit includes a main control channel for controlling the main IGBT, a redundant control channel for controlling other IGBTs, and an energy-taking power supply unit; The redundant control channel is provided with an electronic isolating switch, and the electronic isolating switch is used to control the opening and closing of the redundant control channel to realize redundant control of other IGBTs; The energy-taking power supply unit is used to supply power to the drive unit corresponding to the main IGBT and to supply power to the drive units corresponding to other IGBTs; The other IGBTs include IGBTs in the same power module or IGBTs in adjacent power modules.

2. The redundant drive control device for a power module according to claim 1, characterized in that: The two drive units are respectively a first drive unit and a second drive unit, wherein the first drive unit controls the first IGBT through a first main control channel and controls the second IGBT through a first redundant control channel; The second driving unit controls the second IGBT through the second main control channel, and controls the first IGBT through the second redundant control channel; A master-slave rotation control strategy is adopted between the first drive unit and the second drive unit.

3. The redundant drive control device for a power module according to claim 2, characterized in that: The first drive unit and the second drive unit of the same power module perform cross communication and cross power supply, and are interactively connected to the valve control system device respectively.

4. The redundant drive control device for a power module according to claim 2, characterized in that: Cross-communication is performed between a first drive unit and a second drive unit of a same power module; Between two adjacent power modules, two first drive units are connected via a power supply line, and two second drive units are connected via a power supply line; The corresponding two first drive units are respectively interconnected with a valve control system device, and the two second drive units are interconnected with each other; or, the corresponding two second drive units are respectively interconnected with a valve control system device, and the two first drive units are interconnected with each other.

5. The redundant drive control device for a power module according to claim 1, characterized in that: The power module includes a single physical DC support capacitor or a plurality of physical DC support capacitors connected in parallel.

6. The redundant drive control device for a power module according to claim 5, characterized in that: The physical entity DC link capacitor includes at least two sub-capacitors connected in series.

7. The redundant drive control device for a power module according to claim 6, characterized in that: Each sub-capacitor is connected in parallel with a voltage-dividing resistor, and the voltage-dividing resistor is connected to the energy-taking power supply unit.

8. The redundant drive control device for a power module according to claim 1, characterized in that: The driving unit further comprises an FPGA, which is connected to the main IGBT via a main control channel and to other IGBTs via a redundant control channel.

9. The redundant drive control device for a power module according to claim 8, characterized in that: A voltage detection module is also connected between the FPGA and the energy extraction power supply unit for detecting the capacitor voltage of the power module.

10. A redundant drive control method for a power module, characterized in that: A redundant drive control device for a power module according to any one of claims 1 to 9, comprising: When the drive units are all in normal state, each drive unit controls the corresponding main IGBT through its own main control channel; the electronic isolation switch on the corresponding redundant control channel is in a locked and blocked state; wherein the energy-taking power supply unit supplies power to the drive units of the corresponding main IGBT; When a drive unit in the same power module fails, the drive unit in normal state controls the corresponding main body IGBT through the main control channel, the electronic isolation switch on the corresponding redundant control channel is closed, and the IGBT corresponding to the failed drive unit is controlled through the redundant control channel; the energy-taking power supply unit supplies power to the drive unit corresponding to the main body IGBT, and at the same time provides redundant power supply to the failed drive unit; Alternatively, when a drive unit corresponding to one of two adjacent power modules fails, the drive unit in a normal state controls the corresponding main body IGBT through the main control channel, and the electronic isolation switch on the corresponding redundant control channel is closed. The drive unit of the power module in a normal state controls the IGBT corresponding to the drive unit of the adjacent power module that has failed through the redundant control channel, and the energy supply unit supplies power to the drive unit corresponding to the main body IGBT, and at the same time provides redundant power to the drive unit of the adjacent power module that has failed.

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