Redundant drive control device and method for a power module

Abstract

The present invention belongs to the field of flexible DC transmission converters, and discloses a redundant drive control device and method for a power module, including at least two drive units with the same structure; each drive unit controls the body IGBT and redundantly controls other IGBTs through the main control channel and the redundant control channel, and powers the drive unit itself and redundantly powers other drive units through the energy-taking power supply unit; the electronic isolator switch arranged on the redundant control channel can realize the opening and closing of the redundant control of other IGBTs; the other IGBTs are IGBTs within the same power module or IGBTs within adjacent power modules; the above control structure realizes the redundant control and power supply between the drive units, thereby effectively reducing the risk of system instability caused by secondary board failures; adopting the present drive control device can keep the power module running stably, while greatly reducing the types and quantities of secondary boards of the flexible DC converter valve power module, and improving the overall stability and reliability of the system.

Description

Technical Field

[0001] The present invention belongs to the field of flexible DC transmission converters, specifically relates to the field of power module control, and particularly relates to a redundant drive control device and method for power modules. Background Art

[0002] Flexible DC transmission technology has flexible control and superior performance. It does not require an AC system to support commutation, has dynamic reactive power support capabilities, can effectively suppress AC voltage fluctuations, and reduce the impact of power fluctuations on the receiving-end power grid. It is one of the core power electronic technologies that support the construction of a new power system. It can directly connect wind power, photovoltaic power, pumped storage energy with the load center. Through multi-source access and multi-energy complementarity, it can suppress the volatility and intermittency of renewable energy power generation on a large scale, reduce the impact on the power grid, achieve large-scale power flow regulation and control, and improve the reliability of renewable energy power generation.

[0003] Currently, flexible DC transmission converters with voltage levels of ±500 kV and above are composed of thousands of power modules. In the initial stage of equipment operation, the annual failure rate of power modules is generally at the level of 1%. The main failure objects are the secondary boards of power modules. In order to control the power modules to maintain stable operation, it is necessary to assemble a relatively large variety and quantity of secondary boards on the power modules to form the controller of the power module; the secondary boards mainly include a central control board, an IGBT drive board, a bypass switch trigger board, a high-position energy-taking power supply, a status monitoring board, etc.; as the equipment serves to the middle and late stages of its life, the failure rate of secondary boards will show a significant increase in 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 existing controllers of power modules involve a relatively large variety and quantity of secondary boards, with a complex structure and low fault tolerance, resulting in an impact on 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 power modules to solve the technical problem that the existing controllers of power modules involve a relatively large variety and quantity of secondary boards, with a complex structure and low fault tolerance, resulting in an impact on the stability of the flexible DC transmission system.

[0006] To achieve the above object, the present invention adopts the following technical content:

[0007] In a first aspect, the present invention provides a redundant drive control device for power modules, including at least two drive units with the same structure;

[0008] The drive unit includes a main control channel for controlling the body IGBT, a redundant control channel for controlling other IGBTs, and an energy-taking power supply unit;

[0009] An electronic isolator switch is provided on the redundant control channel, and the electronic isolator switch is used to control the opening and closing of the redundant control channel to achieve redundant control of other IGBTs.

[0010] The energy-taking power supply unit is used to supply power to the drive unit corresponding to the body IGBT and the drive unit corresponding to other IGBTs.

[0011] Among them, other IGBTs include IGBTs within the same power module or IGBTs within adjacent power modules.

[0012] Furthermore, the two drive units are respectively a first drive unit and a second drive unit. Among them, the first drive unit controls the first IGBT through the first main control channel and controls the second IGBT through the first redundant control channel.

[0013] The second drive unit controls the second IGBT through the second main control channel and controls the first IGBT through the second redundant control channel.

[0014] A master-slave rotation control strategy is adopted between the first drive unit and the second drive unit.

[0015] Furthermore, cross communication and cross power supply are carried out between the first drive unit and the second drive unit of the same power module, and they are respectively interconnected with the valve control system device.

[0016] Furthermore,

[0017] Cross communication is carried out between the first drive unit and the second drive unit of the same power module.

[0018] Between two adjacent power modules, the two first drive units are connected by a power supply line, and the two second drive units are connected by 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.

[0019] Furthermore, the power module includes a single physical entity DC support capacitor or multiple physical entity DC support capacitors connected in parallel.

[0020] Furthermore, the physical entity DC support capacitor includes at least two sub-capacitors connected in series.

[0021] Furthermore, a voltage-dividing resistor is connected in parallel to each sub-capacitor, and the voltage-dividing resistor is connected to the energy-taking power supply unit.

[0022] Further, the driving unit further includes an FPGA, which is connected to the body IGBT through the main control channel and connected to other IGBTs through the redundant control channel.

[0023] Further, a voltage detection module is also connected between the FPGA and the energy-taking power supply unit for detecting the capacitor voltage of the power module.

[0024] In a second aspect, the present invention provides a redundant driving control method for a power module. Based on the above redundant driving control device for a power module, it includes:

[0025] When all driving units are in a normal state, each driving unit controls the corresponding body IGBT through its respective main control channel; the electronic isolators on the corresponding redundant control channels are in a locked and blocked state; among them, the energy-taking power supply unit supplies power to the driving units of their respective corresponding body IGBTs.

[0026] When a driving unit in the same power module fails, the driving unit in a normal state controls the corresponding body IGBT through the main control channel, the electronic isolator on the corresponding redundant control channel closes, and controls the IGBT corresponding to the failed driving unit through the redundant control channel; the energy-taking power supply unit supplies power to the driving unit corresponding to the body IGBT, and at the same time supplies redundant power to the failed driving unit.

[0027] Or, when a driving unit corresponding to a power module in two adjacent power modules fails, the driving unit in a normal state controls the corresponding body IGBT through the main control channel, the electronic isolator on the corresponding redundant control channel closes, and the driving unit of the power module in a normal state controls the IGBT corresponding to the failed driving unit of the adjacent power module through the redundant control channel. The energy-taking power supply unit supplies power to the driving unit corresponding to the body IGBT, and at the same time supplies redundant power to the failed driving unit of the adjacent power module.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a redundant drive control device for a power module. This drive control device includes at least two drive units with the same structure; each drive unit respectively realizes the control of the body IGBT and the redundant control of other IGBTs through the main control channel and the redundant control channel, and powers itself and redundantly powers other drive units through the energy-taking power supply unit; the electronic isolator switch arranged on the redundant control channel can realize the opening and closing of the redundant control of other IGBTs, enhancing the fault tolerance of the system; other IGBTs include IGBTs within the same power module or IGBTs within 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 failures; adopting this drive control device can keep the power module running stably while greatly reducing the types and quantities of secondary boards of the flexible DC converter valve power module; the structure is simple and the fault tolerance is high, reducing the equipment maintenance cost and improving the overall stability and reliability of the flexible DC transmission system.

[0030] Preferably, in the present invention, by adopting a first drive unit and a 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.

[0031] Further preferably, in the present invention, cross communication and cross power supply are carried out between two drive units of the same power module and are interconnected with the valve control system device, 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.

[0032] 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 adjust the control strategy more flexibly when facing faults to ensure the stable operation of the system.

[0033] Preferably, in the present invention, the power module is designed to include a single or multiple physically connected DC support capacitors connected in parallel, 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.

[0034] Further preferably, in the present invention, the physical entity DC support capacitor is designed to include at least two series-connected sub-capacitors, which improves the reliability and lifespan of the capacitor; this design enables the capacitor to better protect itself and the IGBT in the face of faults such as overvoltage or short circuit, thereby ensuring the safe operation of the system.

[0035] Further preferably, in the present invention, a voltage-dividing resistor is connected in parallel to each sub-capacitor and is connected to the energy-taking power supply unit, 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 capacitor damage or the occurrence of faults.

[0036] Preferably, in the present invention, an FPGA is introduced into the drive unit and is connected to the IGBT through the main control channel and the redundant control channel, improving the control accuracy and response speed of the system; the powerful processing ability of the FPGA enables the system to more quickly process control signals and fault information, thereby improving the overall performance and reliability of the system.

[0037] Further preferably, in the present invention, a voltage detection module is connected between the FPGA and the energy-taking power supply unit, achieving real-time monitoring of the output power supply voltage; this design enables the system to promptly detect abnormal changes in the supply voltage and take corresponding measures to protect the IGBT and the entire system, thereby improving the safety and stability of the system.

[0038] The present invention also provides a redundant drive control method for a power module. Based on the above redundant drive control device for the power module, in the normal operating state, each drive unit controls the corresponding body IGBT through its respective main control channel, and the electronic isolation switch on the redundant control channel is in the locked and blocked state, and the energy-taking power supply unit supplies power to its corresponding body IGBT; if a certain drive unit fails, the drive unit in the normal state will immediately take over the control of the IGBT corresponding to the faulty drive unit and achieve control through the redundant control channel to ensure that the energy-taking power supply unit provides redundant power supply for the faulty drive unit; this method also considers the redundant power supply strategy between adjacent power modules. When a drive unit of one power module fails, the drive unit of the power module in the normal state performs redundant control on the IGBT corresponding to the faulty drive unit of the adjacent power module, and the energy-taking power supply unit can provide redundant power supply for the faulty drive unit; adopting this redundant drive control method significantly improves the fault tolerance and reliability of the system, reduces the risk of system instability caused by secondary board card failures, 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 DC transmission system. Description of the Drawings

[0039] Figure 1Schematic diagram of a redundant drive control device for a power module provided by an embodiment of the present invention;

[0040] Figure 2 Wiring diagram of a single - capacitor half - bridge power module provided by an embodiment of the present invention;

[0041] Figure 3 Wiring diagram of a double - capacitor half - bridge power module provided by an embodiment of the present invention;

[0042] Figure 4 Wiring diagram of a drive unit and an IGBT provided by an embodiment of the present invention;

[0043] Figure 5 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;

[0044] Figure 6 Adjacent - 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. Detailed implementation manners

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the following specific embodiments are used to further elaborate on the present invention. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0046] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings below is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0048] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0049] As mentioned in the background art, the flexible DC transmission converter valve with a voltage level of ±500 kV and above is composed of thousands of power modules. In the initial stage of equipment operation, the annual failure rate of power modules is generally at the level of 1%, and the main failure object is the secondary circuit board of the power module. In order to control the power module to maintain stable operation, it is necessary to assemble a relatively large variety and quantity of secondary circuit boards on the power module to form the controller of the power module; the secondary circuit boards mainly include a central control board, an IGBT drive board, a bypass switch trigger board, a high-position energy-taking power supply, a status monitoring board, etc.; as the equipment serves to the middle and late stages of its life, the failure rate of the secondary circuit board will show a significant increase in the bathtub curve, seriously affecting the stability of the flexible DC transmission system and increasing the equipment maintenance cost. Therefore, it is urgent to carry out research on the technology of the secondary circuit board of the power module with intensification and high fault tolerance to improve the reliability of the equipment.

[0050] To solve the above problems, this embodiment provides a redundant drive control device for a power module. By using the redundant drive control device, it is possible to greatly reduce the types and quantities of the secondary circuit boards of the flexible DC converter valve power module on the premise of ensuring the power module, and achieve the intensive and highly fault-tolerant design of the 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.

[0051] The following Figures 1 to 6 explains the relevant symbols and technical term abbreviations involved:

[0052] IN1, IN2: Optical ports for input of drive board signals; IN represents the input terminal;

[0053] OUT1, OUT2: Optical ports for feedback of drive board signals; OUT represents the output terminal;

[0054] FPGA: Field-Programmable Gate Array; FPGA (Field-Programmable Gate Array) is a semi-custom integrated circuit composed of an array of logic cells.

[0055] CH1, CH2: IGBT monitoring and control circuits (control channels); CH (Channel) refers to the channel, which is used to represent the connection and transmission of signals and other information between objects or structures; IGBT (Insulated Gate Bipolar Transistor) is a composite fully controlled voltage-driven power semiconductor device.

[0056] Gsw: Electronic isolation switch; Gsw (Gate switch) is the drive gate isolation switch;

[0057] C, G, E: Wiring terminals for the collector, gate, and emitter of the body IGBT, respectively;

[0058] Cbak, Gbak, Ebak: Redundant connection terminals for the collector, gate, and emitter of the IGBT in the pair tube; bak (Backup) indicates backup;

[0059] PSU, PSU1, PSU2: High-potential energy-taking power supply units for DC / DC conversion; PSU (Power Supply Unit) is the power supply unit;

[0060] 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 grounding wire;

[0061] Vout, COM: Output terminals of the energy-taking power supply unit; Vout (Output Voltage) represents the output voltage; COM (Common) is the common terminal or common ground;

[0062] Vin-bak, Vout-bak: Redundant power supply input and output terminals respectively; Vin-bak (Input Voltage-Backup) represents input backup; Vout-bak (Output Voltage-Backup) represents output backup;

[0063] IGBT1, IGBT2: The upper IGBT and lower IGBT of the half-bridge power module respectively;

[0064] C1, C2 (or C11, C12, or C21, C22): Two series-connected sub-capacitors inside a single physical entity capacitor; C represents capacitance;

[0065] R1, R2 (or R11, R12, or R21, R22): Voltage-dividing resistors for two series-connected sub-capacitors inside a single physical entity capacitor; R represents resistance;

[0066] Driver1, Driver2: IGBT drive units; Driver represents the drive unit;

[0067] SM: Power module; SM (Submodule) represents the submodule;

[0068] SMn, SMn+1: Two adjacent power modules;

[0069] VBE: Converter valve control system device; VBE (Valve Base Electronics) is the converter valve control system.

[0070] Such as Figure 1 And Figure 4As shown in the figure, this embodiment provides a redundant drive control device for a power module, which includes an energy-taking power supply unit and two drive units with the same structure. It should be noted that in this embodiment, taking two drive units as an example, the number of drive units can also be set to 3, 4 or more according to the actual product requirements.

[0071] Among them, 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 body IGBT, and the other redundant control channel CH2 serves as the redundant control unit for other IGBTs.

[0072] An electronic isolation switch Gsw is connected in series between the IGBT redundant control channel and the external terminals of the collector, gate, and emitter of the paired IGBT. When the redundant control channel is in the standby state, the electronic isolation switch Gsw is in the locked blocking state.

[0073] For another example Figure 1 As shown in the figure, in this embodiment, the drive unit is configured with an energy-taking power supply unit PSU with redundant output. The upper and lower tube drive units (Driver1, Driver2) inside the power module can be used for redundant power supply. One output power supply supplies power to the body IGBT drive unit, and the other output power supply supplies redundant power to the paired IGBT drive unit; or redundant power supply between adjacent power modules can be adopted.

[0074] In this embodiment, the IGBT drive unit of the power module is configured with two control signal input and output channels. Cross-communication of the upper and lower tube drive units inside the power module can be adopted. 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 between adjacent power modules can be adopted. Two power modules adopt master-slave control. One 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.

[0075] In this embodiment, as Figure 2 and Figure 3 shown, the power module can adopt a single or multiple parallel physical entity DC support capacitors.

[0076] Specifically, as Figure 2 shown, a single physical entity DC support capacitor is internally composed of multiple sub-capacitors connected in series.

[0077] Combined with Figure 2 and Figure 3 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; precise control and protection of the capacitor voltage are achieved.

[0078] In this embodiment, when cross-communication is adopted between the upper and lower transistor driving units inside the power module, the master-slave control mode is switched in a fixed cycle when the power module is in the cut-off state.

[0079] As Figure 5 and Figure 6 shown, the working states are mutually feedback between the upper and lower transistor driving units (the first driving unit and the second driving unit) inside the power module and are synchronously transmitted to the valve control system device.

[0080] As Figure 5 shown, cross-communication is carried out between the first driving unit and the second driving unit of the same power module; the first driving unit and the second driving unit are also connected through a power supply line to achieve cross-power supply.

[0081] For example, in the same power module SM1, if the first driving unit fails and the second driving unit works normally, the second driving unit performs redundant control on the IGBT corresponding to the first driving unit through its own redundant control channel; at this time, the redundant control channel corresponding to the second driving unit is in a conducting state and the electronic isolator switch is closed; and the energy-taking power supply unit corresponding to the second driving unit supplies redundant power to the first driving unit; thus, cross-communication and cross-power supply between the two driving units of the same power module are achieved.

[0082] As Figure 6 shown, between two adjacent power modules, the two first driving units are connected through a power supply line, and the two second driving units are connected through a power supply line; the corresponding two first driving units are respectively connected to the valve control system device in an interactive manner, and the two second driving units are connected to each other in an interactive manner; or, the corresponding two second driving units are respectively connected to the valve control system device in an interactive manner, and the two first driving units are connected to each other.

[0083] In this embodiment, the two first driving units of two adjacent power modules are connected through a power supply line, the two second driving units are connected through a power supply line, and the two second driving units are respectively connected to the valve control system device through a communication line; the two first driving units are connected through a communication line.

[0084] 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 is operating normally, the first drive unit of the first power module SM1 performs redundant control on 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 conducting state, and the electronic isolator switch is closed; and the power supply unit for energy extraction corresponding to the first drive unit of the first power module SM1 supplies redundant power to the first drive unit in the second power module SM2; thus realizing cross-communication and cross-power supply of each drive unit between two adjacent power modules.

[0085] It can be seen that this embodiment provides a redundant drive control device for a power module, which can greatly reduce the types and quantities of secondary boards of the flexible DC converter valve power module, and reduce the primary equipment construction cost; at the same time, by improving the reliability of the flexible DC converter valve throughout its life cycle, the equipment operation and maintenance cost will be greatly reduced.

[0086] Combined Figure 1 with Figure 4 as shown, this embodiment provides a redundant drive control device for a power module, and the working principle is as follows:

[0087] When both drive units inside the power module are in a normal state, the drive units control the correspondingly connected IGBTs through their respective main control channels CH1;

[0088] When one of the two drive units inside the power module is in a fault state, the normal drive unit switches to the main control mode and controls the body IGBT through the CH1 channel and the paired IGBT through the CH2 channel.

[0089] In this embodiment, when cross-communication is adopted between adjacent power modules, when a fault occurs in one of the power modules, the normal power module monitors the faulty power module through the standby communication channel (redundant control channel);

[0090] The adjacent power modules mutually feedback their working states and synchronously transmit them to the valve control system device;

[0091] When both drive units inside the power module are in a normal state, the drive units control the correspondingly connected IGBTs through their respective main control channels.

[0092] In summary, the present invention provides a redundant drive control device and method for a power module, which has the following advantages compared with the existing drive controller of the power module:

[0093] The present invention realizes a high degree of 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 body IGBT, but also adds a redundant control channel for controlling other IGBTs, and is equipped with an electronic isolation switch to flexibly control the on / off of the paired IGBTs, 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 units corresponding to the body IGBTs and the drive units corresponding to other IGBTs respectively, and can also achieve redundant power supply between adjacent power modules when needed, further enhancing the stability and continuity of the entire system. The use of this drive control device significantly improves the operation 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; thus, 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 quantities of secondary boards of the flexible DC converter valve power module; it has a simple structure and high fault tolerance, reduces the equipment maintenance cost, and improves the overall stability and reliability of the flexible DC transmission system.

[0094] The above embodiments are only one of the implementation manners capable of realizing the technical solution of the present invention. The scope of protection required by the present invention is not only limited by this embodiment, but also includes any changes, substitutions and other implementation manners that are easily conceivable by those skilled in the art 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; Among them, other IGBTs include IGBTs in the same power module or IGBTs in adjacent power modules; 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.

2. The redundant drive control device for a power module according to claim 1, 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.

3. The redundant drive control device for a power module according to claim 1, 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.

4. 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.

5. The redundant drive control device for a power module according to claim 4, characterized in that: The physical entity DC link capacitor includes at least two sub-capacitors connected in series.

6. The redundant drive control device for a power module according to claim 5, 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.

7. 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.

8. The redundant drive control device for a power module according to claim 7, 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.

9. 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 8, 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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