High-voltage wide-range IGCT anode voltage detection module

Abstract

The utility model relates to a high-voltage wide-range IGCT (integrated gate commutated thyristor) anode voltage detection module, and aims to solve the problems that simultaneous detection is difficult to realize, the circuit is complicated, the cost and the unreliability are greatly increased, the real-time performance is poor, the timeliness of signal protection action is reduced, devices are easy to damage, and the measurement result is difficult to keep accurate in the prior art. The device comprises a high-voltage detection resistor, an electronic switch module, a high-voltage detection module, a low-voltage detection module, a negative-voltage detection module, a zero-crossing synchronous detection module, a logic judgment module, an optical fiber transceiver module and an IGCT switching-on and switching-off current generation module. The circuit is simple, the state of the IGCT anode voltage can be simply and accurately detected, and the use reliability and use flexibility of the IGCT in a power system are improved.

Description

Technical Field

[0001] The utility model relates to an IGCT anode voltage detection module, in particular to an IGCT anode voltage detection module with high voltage and wide range. Background Art

[0002] Integrated gate-commutated thyristor IGCT is a new generation of fully controlled high-power semiconductors, developed by ABB in 1997, and is mainly used in medium and high voltage inverters, motor drive, offshore wind power converters, etc. With the continuous promotion of the country's green and low-carbon policies, IGCT has a huge new application space in the new generation of conventional UHV DC transmission and flexible DC transmission transformation.

[0003] Integrated gate commutated thyristor IGCT is usually composed of GCT chip and gate drive unit, which are integrated together through PCB circuit board in a low-inductance way. IGCT combines the advantages of stable turn-off capability of transistor and low conduction loss of thyristor, and has the characteristics of high voltage resistance, high current, high reliability and low conduction loss. The new generation of IGCT for normally direct conversion valve has made great progress in power, reliability, switching speed, efficiency and cost, and is suitable for the operation and use needs of valve.

[0004] In the field of IGCT valve application technology, how to detect the constantly changing high and low voltages on the valve through sampling resistors and realize the corresponding control and protection actions of the IGCT drive has always been a key and difficult point in the application of IGCT valves. The existing high and low voltage signal detection method on the valve is difficult to achieve simultaneous detection because the potential difference between the high and low voltage sampling signals is large after the resistance value of the sampling loop on the valve is determined. Generally, two detection circuits are set up, and independent voltage division is required from the valve respectively. The sampling device on the valve is added, making the circuit more complicated, and the cost and unreliability are greatly increased. At the same time, the real-time performance of the signal collected by the FPGA is poor, which reduces the timeliness of the signal protection action, the device is easily damaged, and the measurement results are difficult to maintain accuracy.

[0005] Therefore, developing a high-voltage, wide-range IGCT anode voltage detection module based on a new electronic switch to avoid the impact of different sampling ratios between high and low voltage detection signals and to ensure the sampling accuracy and timeliness of protection actions on the IGCT device valve is a technical problem that needs to be solved in the current IGCT valve applications. Utility Model Content

[0006] In order to solve the problem in the prior art that after the resistance of the sampling loop on the valve is determined, the potential difference between the high and low voltage sampling signals is large, making it difficult to achieve simultaneous detection, two detection circuits are generally set up, and independent voltage division is required from the valve respectively, which increases the sampling device on the valve, makes the circuit more complicated, and greatly increases the cost and unreliability. At the same time, the real-time performance of the signal collected by FPGA is poor, which reduces the timeliness of the signal protection action, makes the device easy to be damaged, and makes it difficult to maintain the accuracy of the measurement result.

[0007] The technical means of the utility model: a high-voltage wide-range IGCT anode voltage detection module, including an IGCT on-off current generation module, a logic judgment module, an optical signal transmission module, a voltage detection module, and also includes an electronic switch module, a high-voltage detection module, a low-voltage detection module, a negative pressure detection module, and a zero-crossing synchronization detection module;

[0008] The electronic switch module is respectively connected to the high voltage detection module, the low voltage detection module, and the negative pressure detection module, and the high voltage detection module, the low voltage detection module, the negative pressure detection module, and the zero-crossing synchronization detection module are respectively connected to the logic judgment module, the logic judgment module connects the electronic switch module and the IGCT on and off current generation module, and the logic judgment module is interconnected with the optical signal transmission module;

[0009] It also includes high-voltage resistors RX1 and RX2, wherein the high-voltage resistor RX1 is connected to the anode of the IGCT, the high-voltage resistor RX2 is connected to the cathode of the IGCT, the high-voltage resistor RX1 is connected to the high-voltage resistor RX2, and an electronic switch module and a zero-crossing synchronous detection module are connected between the high-voltage resistors RX1 and RX2;

[0010] The IGCT on and off current generating module is connected to the cathode of the IGCT.

[0011] The logic judgment module includes four input ports IN1, IN2, IN3, IN4, and three output ports N1, N2, N3.

[0012] The electronic switch module includes three parallel output terminals, namely S1, S2, and S3, which are respectively connected to the signal input terminals of the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module, and also includes three control terminals, which are respectively connected to N1, N2, and N3 to control the on and off of S1, S2, and S3 respectively.

[0013] The high-voltage detection module includes a comparator U2, a negative input terminal of the comparator U2 connected to a resistor R4, the resistor R4 connected to a resistor R3 and a resistor R5, the resistor R5 is grounded, the resistor R3 is connected to an output terminal S1, a positive input terminal of the comparator U2 connected to resistors R1, R2, and R6, the resistor R6 is connected to an output terminal of the comparator U2, and an output terminal of the comparator U2 is connected to a resistor R7 and a port IN2.

[0014] The low voltage detection module includes a unidirectional amplifier U3 and a comparator U4. The negative input terminal of the unidirectional amplifier U3 is connected to a resistor R8. The negative electrode of the voltage regulator tube ZD1 and the negative electrode of the voltage regulator tube ZD2 are connected between the negative input terminal of the unidirectional amplifier U3 and the resistor R8. The positive electrodes of the voltage regulator tubes ZD1 and ZD2 are grounded. The resistor R8 is connected to the output terminal S2; the positive input terminal of the unidirectional amplifier U3 is connected to resistors R14 and R9. The output terminal of the unidirectional amplifier U3 and the resistor R9 are connected to R15. R15 is connected to the negative input terminal of the comparator U4. The positive input terminal of the comparator U4 is connected to resistors R10, R11, and R12. The resistor R12 is connected to the output terminal of the comparator U4. The output terminal of the comparator U4 and the resistor R12 are connected to R13 and the port IN3.

[0015] The negative pressure detection module includes an inverse proportional amplifier U5 and a comparator U6. The negative input terminal of the inverse proportional amplifier U5 is connected to resistors R17 and R18. The resistor R17 is connected to R16. The positive electrode of the voltage regulator tube ZD3 and the positive electrode of the voltage regulator tube ZD4 are connected between the resistors R17 and R16. The positive electrode of the voltage regulator tube ZD3 and the negative electrode of the voltage regulator tube ZD4 are grounded. The resistor R16 is connected to the output terminal S3, and the resistor R18 is connected to the output terminal of the inverse proportional amplifier U5; the resistor R18 and the output terminal of the inverse proportional amplifier U5 are connected to resistor R19, and the resistor R19 is connected to the negative input terminal of the comparator U6. The positive input terminal of the comparator U6 is connected to resistors R20, R21, and R22. The resistor R22 is connected to the output terminal of the comparator U6. The output terminal of the comparator U6 and the resistor R22 are connected to the resistor R23 and the port IN1.

[0016] The zero-crossing synchronous detection module includes an amplifier U7, the negative input end of the amplifier U7 is connected to a resistor R28, the resistor R28 is connected to a resistor R29, the positive input end of the amplifier U7 is connected to a resistor R27, the resistor R27 is connected to the cathode of the voltage regulator ZD5 and the cathode of the diode D1, the resistors R28 and R29 are connected to the output end of the amplifier U7, the output end of the amplifier U7 and the resistors R28 and R29 are connected to a resistor R24, the resistor R24 ​​is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to a resistor R25, and the emitter of the transistor Q1 is connected to a resistor R26 and a port IN4.

[0017] Advantages of the utility model: The utility model provides a high-voltage, wide-range IGCT anode voltage detection module, which can accurately detect a wide range of voltages from kilovolts to tens of volts and negative tens of volts flowing through the IGCT anode; the utility model only uses one sampling resistor to simultaneously meet the detection of three voltages, simplifies peripheral connection devices, greatly saves costs, and improves equipment reliability.

[0018] The utility model can realize high voltage, low voltage and negative pressure detection without the need for negative power supply, thereby simplifying the circuit and saving the module volume.

[0019] The utility model can take corresponding actions in time according to the detected results, so that the IGCT chip is in the on or off state required for normal working conditions, thereby improving the reliability of the operation of the power device or the power system.

[0020] The utility model can receive control commands from a host computer and can also feed back detection results to the host computer in a timely manner in the form of optical pulse signals. The host computer can always understand the working state of the IGCT and the state of the external voltage applied thereto, thereby reducing the occurrence rate of faults.

[0021] In the utility model, one end of the electronic switch module is connected to the high-voltage resistor, and the other end is connected to the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module respectively. The detection output signals of the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module are given to the logic judgment module. The logic judgment module controls the on and off of the switch in the electronic switch module after logical analysis of these signals and the zero-crossing detection module signal. This is a closed-loop control with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of the utility model.

[0023] Figure 2 This is a diagram of an electronic switch module of the present utility model.

[0024] Figure 3 This is the principle diagram of the high voltage detection module of the utility model.

[0025] Figure 4 This is the principle diagram of the low voltage detection module of the utility model.

[0026] Figure 5 This is a schematic diagram of a negative pressure detection module of the utility model.

[0027] Figure 6 This is a schematic diagram of a zero-crossing synchronous detection module of the utility model.

[0028] Figure 7 This is the electrical connection diagram of the voltage detection part of the utility model.

[0029] Figure 8 It is a schematic diagram of the utility model integrated on the IGCT drive module. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the examples of the utility model to clearly and completely describe the technical solutions in the examples of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0031] like Figures 1 to 8 The utility model is a high voltage wide range IGCT anode voltage detection module, including an IGCT opening and closing current generation module, a logic judgment module, an optical signal transmission module, a voltage detection module, and also includes an electronic switch module, a high voltage detection module, a low voltage detection module, a negative pressure detection module, and a zero-crossing synchronization detection module;

[0032] The electronic switch module is respectively connected to the high voltage detection module, the low voltage detection module, and the negative pressure detection module, and the high voltage detection module, the low voltage detection module, the negative pressure detection module, and the zero-crossing synchronization detection module are respectively connected to the logic judgment module, the logic judgment module connects the electronic switch module and the IGCT on and off current generation module, and the logic judgment module is interconnected with the optical signal transmission module;

[0033] It also includes high-voltage resistors RX1 and RX2, wherein the high-voltage resistor RX1 is connected to the anode of the IGCT, the high-voltage resistor RX2 is connected to the cathode of the IGCT, the high-voltage resistor RX1 is connected to the high-voltage resistor RX2, and an electronic switch module and a zero-crossing synchronous detection module are connected between the high-voltage resistors RX1 and RX2;

[0034] The IGCT on and off current generating module is connected to the cathode of the IGCT.

[0035] The logic judgment module includes four input ports IN1, IN2, IN3, IN4, and three output ports N1, N2, N3.

[0036] The electronic switch module includes three parallel output terminals, namely S1, S2, and S3, which are respectively connected to the signal input terminals of the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module, and also includes three control terminals, which are respectively connected to N1, N2, and N3 to control the on and off of S1, S2, and S3 respectively.

[0037] The high-voltage detection module includes a comparator U2, a negative input terminal of the comparator U2 connected to a resistor R4, the resistor R4 connected to a resistor R3 and a resistor R5, the resistor R5 is grounded, the resistor R3 is connected to an output terminal S1, a positive input terminal of the comparator U2 connected to resistors R1, R2, and R6, the resistor R6 is connected to an output terminal of the comparator U2, and an output terminal of the comparator U2 is connected to a resistor R7 and a port IN2.

[0038] The low voltage detection module includes a unidirectional amplifier U3 and a comparator U4. The negative input terminal of the unidirectional amplifier U3 is connected to a resistor R8. The negative electrode of the voltage regulator tube ZD1 and the negative electrode of the voltage regulator tube ZD2 are connected between the negative input terminal of the unidirectional amplifier U3 and the resistor R8. The positive electrodes of the voltage regulator tubes ZD1 and ZD2 are grounded. The resistor R8 is connected to the output terminal S2; the positive input terminal of the unidirectional amplifier U3 is connected to resistors R14 and R9. The output terminal of the unidirectional amplifier U3 and the resistor R9 are connected to R15. R15 is connected to the negative input terminal of the comparator U4. The positive input terminal of the comparator U4 is connected to resistors R10, R11, and R12. The resistor R12 is connected to the output terminal of the comparator U4. The output terminal of the comparator U4 and the resistor R12 are connected to R13 and the port IN3.

[0039] The negative pressure detection module includes an inverse proportional amplifier U5 and a comparator U6. The negative input terminal of the inverse proportional amplifier U5 is connected to resistors R17 and R18. The resistor R17 is connected to R16. The positive electrode of the voltage regulator tube ZD3 and the positive electrode of the voltage regulator tube ZD4 are connected between the resistors R17 and R16. The positive electrode of the voltage regulator tube ZD3 and the negative electrode of the voltage regulator tube ZD4 are grounded. The resistor R16 is connected to the output terminal S3, and the resistor R18 is connected to the output terminal of the inverse proportional amplifier U5; the resistor R18 and the output terminal of the inverse proportional amplifier U5 are connected to resistor R19, and the resistor R19 is connected to the negative input terminal of the comparator U6. The positive input terminal of the comparator U6 is connected to resistors R20, R21, and R22. The resistor R22 is connected to the output terminal of the comparator U6. The output terminal of the comparator U6 and the resistor R22 are connected to the resistor R23 and the port IN1.

[0040] The zero-crossing synchronous detection module includes an amplifier U7, the negative input end of the amplifier U7 is connected to a resistor R28, the resistor R28 is connected to a resistor R29, the positive input end of the amplifier U7 is connected to a resistor R27, the resistor R27 is connected to the cathode of the voltage regulator ZD5 and the cathode of the diode D1, the resistors R28 and R29 are connected to the output end of the amplifier U7, the output end of the amplifier U7 and the resistors R28 and R29 are connected to a resistor R24, the resistor R24 ​​is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to a resistor R25, and the emitter of the transistor Q1 is connected to a resistor R26 and a port IN4.

[0041] like Figure 1The structure block diagram of the utility model is shown, wherein RX1 and RX2 are high-voltage voltage-dividing resistors, VGK is the gate cathode voltage driven by the IGCT, the high-voltage resistor RX1 is connected to the anode of the IGCT, and RX2 is connected to the cathode of the IGCT drive. The high-voltage resistor is connected to the input of the electronic switch module, and the output of the electronic switch module is respectively connected to the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module. The zero-crossing detection module is directly connected to the high-voltage resistor. The logic judgment module determines when to connect the high-voltage detection module or the low-voltage detection module or the negative pressure detection module according to the output level status of the high-voltage detection module, the low-voltage detection module, the negative pressure detection module, and the zero-crossing detection module. The logic judgment module controls the IGCT to turn on and off the current generating module according to the detection result. At the same time, the logic judgment module feeds back the judgment result to the host computer through the optical signal transmission module.

[0042] like Figure 2 The electronic switch module of the utility model is shown in FIG. The electronic switch has three inputs connected in parallel, and the outputs S1, S2, and S3 are connected to the signal inputs of the high-voltage detection module, the low-voltage detection module, and the negative-pressure detection module, respectively. The control signals of the control terminals N1, N2, and N3 of the electronic switch module come from the logic judgment module, and control the on and off of S1, S2, and S3, respectively.

[0043] Figure 3 This is the schematic diagram of the high-voltage detection module of the utility model. The kilovolt voltage enters the resistor R3 of the high-voltage detection module through the electronic switch module after being divided by the high-voltage resistor. The resistors R1 and R2 are the voltage-dividing resistors at the positive end of the comparator U2. When the signal after the voltage division by the high-voltage resistor is higher than the voltage-dividing voltage of R1 and R2, the comparator outputs a low level, otherwise it outputs a high level.

[0044] Figure 4 This is the low-voltage detection module of the utility model. After the high-voltage resistor divides the voltage, it enters the resistor R8 of the low-voltage detection module through the electronic switch module. The voltage regulator tubes ZD1 and ZD2 are used to filter out the negative voltage. R14, R9 and U3 are unidirectional amplifiers. The amplified signal enters the comparator U4. When the voltage exceeds the set threshold, the comparator outputs a low level, otherwise it outputs a high level.

[0045] Figure 5 This is the negative pressure detection module of the utility model. After the high-voltage resistor divides the voltage, it enters the resistor R16 of the negative pressure detection module through the electronic switch module. The voltage regulator tubes ZD3 and ZD4 are used to filter out the forward voltage. R17, R18 and U5 are reverse proportional amplifiers. The amplified signal enters the comparator U6. When the voltage exceeds the set threshold, the comparator outputs a low level, otherwise it outputs a high level.

[0046] Figure 6It is the zero-crossing synchronous detection module of the utility model. The tiny signal after the high-voltage resistor voltage division enters the non-inverting amplifier circuit of amplifier U7. The amplified signal controls the on-off of the transistor. When it crosses zero, the circuit outputs a high level, otherwise it outputs a low level.

[0047] Figure 7 This is the electrical connection diagram of the voltage detection part of the utility model. RX1 and RX2 are the high-voltage voltage-dividing resistors of the IGCT anode voltage. The level signal IN4 output by the zero-crossing synchronous detection module is sent to the logic judgment module. The logic judgment module controls the operation of the high-voltage detection module, the low-voltage detection module and the negative-voltage detection module according to the level signal of IN4. When the output level signal IN4 of the zero-crossing synchronous detection module is high, the logic judgment module gives an enable signal N2 to switch S2 to close the switch S2, and the low-voltage detection module starts to work. When the logic judgment module detects that the level signal IN3 output by the low-voltage detection module is low, the logic judgment module gives N2 an enable signal to switch S2 to disconnect, and gives switch S1 an enable signal N1 to close the switch S1, and the high-voltage detection module starts to work. When the logic control module detects that the signal IN2 output by the high-voltage detection module is low and the output signal IN4 of the zero-crossing detection module is low after a period of time, the logic control module gives switch S1 an enable signal N1 to disconnect S1, and gives switch S3 an enable signal N3 to close the switch S3, and the negative-voltage detection module starts to work.

[0048] Figure 8 This is a schematic diagram of a high-voltage, wide-range IGCT anode detection voltage module integrated on an IGCT drive module of the utility model, in which 1 is an IGCT drive printed circuit board, 2 is an optical signal transmission module, 3 is a voltage detection module, 4 is an IGCT on and off current generation module, 5 is a logic judgment module, and 6 is a GCT chip and a chip shell. Figure 8 One end of the high voltage detection resistor RX1 is connected to the anode of the GCT chip shell, and the other end is connected to the 3 voltage detection module.

[0049] Module functions and applications: A high-voltage, wide-range IGCT anode voltage detection module, including a high-voltage resistor, an electronic switch module, a high-voltage detection module, a low-voltage detection module, a negative pressure detection module, a zero-crossing synchronization detection module, a logic judgment module, an optical signal transmission module, and an IGCT on- and off-current generation module.

[0050] The high-voltage resistor is used to divide the voltage signal of the IGCT anode and send it to the detection module.

[0051] The electronic switch module connects or disconnects the divided signal to the high-voltage detection module, the low-voltage detection module, and the negative-pressure detection module respectively at different phases, thereby avoiding mutual interference among the high-voltage detection module, the low-voltage detection module, and the negative-pressure detection module, which may affect the detection accuracy and results.

[0052] The high-voltage detection module is used to detect the kilovolt-level high voltage of the IGCT anode. The high-voltage detection module sends the detection result to the logic judgment module in the form of a level signal. When the voltage signal detected by the high-voltage detection module reaches the detection threshold, the logic judgment module sends a trigger command to the IGCT on-off current generation module to turn on the IGCT in the blocking state, thereby preventing the device from being damaged by overvoltage.

[0053] The low voltage detection module is used to detect the voltage signal of tens of volts at the anode of the IGCT. The low voltage detection module inputs the detection result into the logic judgment module as a level signal. When the voltage signal detected by the low voltage detection module reaches the detection threshold, the logic judgment module sends a trigger command to the IGCT on and off current generation module to turn on the IGCT in the blocking state.

[0054] The negative pressure detection module is used to detect the sinusoidal negative half-axis signal flowing through the IGCT anode, and the negative pressure detection module inputs the detection result into the logic judgment module as a level signal. When the voltage signal detected by the negative pressure detection module reaches the detection threshold, the logic judgment module sends a trigger command to the IGCT on and off current generation module to put the IGCT in a blocking state.

[0055] The zero-crossing synchronous detection module is used to detect the positive and negative half axes of the sinusoidal signal flowing through the IGCT anode. The zero-crossing synchronous detection module inputs the detection result into the logic judgment module as a level signal. This signal is used as a synchronization signal. The logic judgment module combines this signal with the feedback signals of the high-voltage detection module, the low-voltage detection module, and the negative-voltage detection module to control the on and off of the electronic switch module.

[0056] The logic judgment module includes a control chip, which is an FPGA device, and is used to judge the level signals sent by the high-voltage detection module, the low-voltage detection module, the negative pressure detection module, and the zero-crossing synchronous detection module and the command signal sent by the host computer. According to the judgment result, the logic judgment module outputs three level signals to the three control ports N1, N2, and N3 of the electronic switch module respectively, and controls the switch S1 of the high-voltage detection module, the switch S2 of the low-voltage detection module, and the switch S3 of the negative pressure detection in the electronic switch module to be turned on and off at appropriate times, thereby controlling the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module to work. At the same time, the logic judgment module gives the judgment result to the IGCT opening and closing current generation module to control the working state of the IGCT in the working condition. And the logic judgment module feeds back the working state of the IGCT in different time periods to the host computer through the optical fiber transceiver module.

[0057] After receiving the command from the host computer, the optical signal transmission module converts the optical signal into an electrical signal and sends it to the logic judgment module. The logic judgment module feeds back the on / off status of the IGCT in each time period to the host computer in the form of optical pulses through the optical fiber transceiver module. Real-time monitoring ensures reliable operation of the working condition.

[0058] The IGCT on and off current generating module consists of two parts, namely, the IGCT on current pulse generating circuit and the IGCT off pulse generating circuit. After receiving the signal from the logic judgment module, the IGCT on and off current generating circuit takes corresponding actions to ensure that the IGCT is turned on or off at the appropriate time.

Claims

1. A high voltage and wide range IGCT anode voltage detection module, comprising an IGCT on and off current generation module, a logic judgment module, an optical signal transmission module, and a voltage detection module, characterized in that: It also includes an electronic switch module, a high voltage detection module, a low voltage detection module, a negative pressure detection module, and a zero-crossing synchronization detection module; The electronic switch module is respectively connected to the high voltage detection module, the low voltage detection module, and the negative pressure detection module, and the high voltage detection module, the low voltage detection module, the negative pressure detection module, and the zero-crossing synchronization detection module are respectively connected to the logic judgment module, the logic judgment module connects the electronic switch module and the IGCT on and off current generation module, and the logic judgment module is interconnected with the optical signal transmission module; It also includes high-voltage resistors RX1 and RX2, wherein the high-voltage resistor RX1 is connected to the anode of the IGCT, the high-voltage resistor RX2 is connected to the cathode of the IGCT, the high-voltage resistor RX1 is connected to the high-voltage resistor RX2, and an electronic switch module and a zero-crossing synchronous detection module are connected between the high-voltage resistors RX1 and RX2; The IGCT on and off current generating module is connected to the cathode of the IGCT.

2. A high voltage wide range IGCT anode voltage detection module as claimed in claim 1, characterized in that: The logic judgment module includes four input ports IN1, IN2, IN3, IN4, and three output ports N1, N2, N3.

3. A high voltage wide range IGCT anode voltage detection module as claimed in claim 2, characterized in that: The electronic switch module includes three parallel output terminals, namely S1, S2, and S3, which are respectively connected to the signal input terminals of the high-voltage detection module, the low-voltage detection module, and the negative pressure detection module, and also includes three control terminals, which are respectively connected to N1, N2, and N3 to control the on and off of S1, S2, and S3 respectively.

4. The high voltage and wide range IGCT anode voltage detection module according to claim 3, characterized in that: The high-voltage detection module includes a comparator U2, a negative input terminal of the comparator U2 connected to a resistor R4, the resistor R4 connected to a resistor R3 and a resistor R5, the resistor R5 is grounded, the resistor R3 is connected to an output terminal S1, a positive input terminal of the comparator U2 connected to resistors R1, R2, and R6, the resistor R6 is connected to an output terminal of the comparator U2, and an output terminal of the comparator U2 is connected to a resistor R7 and a port IN2.

5. The high voltage and wide range IGCT anode voltage detection module according to claim 3, characterized in that: The low voltage detection module includes a unidirectional amplifier U3 and a comparator U4. The negative input terminal of the unidirectional amplifier U3 is connected to a resistor R8. The negative electrode of the voltage regulator tube ZD1 and the negative electrode of the voltage regulator tube ZD2 are connected between the negative input terminal of the unidirectional amplifier U3 and the resistor R8. The positive electrodes of the voltage regulator tubes ZD1 and ZD2 are grounded. The resistor R8 is connected to the output terminal S2; the positive input terminal of the unidirectional amplifier U3 is connected to resistors R14 and R9. The output terminal of the unidirectional amplifier U3 and the resistor R9 are connected to R15. R15 is connected to the negative input terminal of the comparator U4. The positive input terminal of the comparator U4 is connected to resistors R10, R11, and R12. The resistor R12 is connected to the output terminal of the comparator U4. The output terminal of the comparator U4 and the resistor R12 are connected to R13 and the port IN3.

6. The high voltage and wide range IGCT anode voltage detection module according to claim 3, characterized in that: The negative pressure detection module includes an inverse proportional amplifier U5 and a comparator U6. The negative input terminal of the inverse proportional amplifier U5 is connected to resistors R17 and R18. The resistor R17 is connected to R16. The positive electrode of the voltage regulator tube ZD3 and the positive electrode of the voltage regulator tube ZD4 are connected between the resistors R17 and R16. The positive electrode of the voltage regulator tube ZD3 and the negative electrode of the voltage regulator tube ZD4 are grounded. The resistor R16 is connected to the output terminal S3, and the resistor R18 is connected to the output terminal of the inverse proportional amplifier U5; the resistor R18 and the output terminal of the inverse proportional amplifier U5 are connected to resistor R19, and the resistor R19 is connected to the negative input terminal of the comparator U6. The positive input terminal of the comparator U6 is connected to resistors R20, R21, and R22. The resistor R22 is connected to the output terminal of the comparator U6. The output terminal of the comparator U6 and the resistor R22 are connected to the resistor R23 and the port IN1.

7. The high voltage and wide range IGCT anode voltage detection module according to claim 3, characterized in that: The zero-crossing synchronous detection module includes an amplifier U7, the negative input end of the amplifier U7 is connected to a resistor R28, the resistor R28 is connected to a resistor R29, the positive input end of the amplifier U7 is connected to a resistor R27, the resistor R27 is connected to the cathode of the voltage regulator ZD5 and the cathode of the diode D1, the resistors R28 and R29 are connected to the output end of the amplifier U7, the output end of the amplifier U7 and the resistors R28 and R29 are connected to a resistor R24, the resistor R24 ​​is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to a resistor R25, and the emitter of the transistor Q1 is connected to a resistor R26 and a port IN4.

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