A valve tester verification method and system for reverse blocking igct drive function

Abstract

The application discloses a valve tester verification method and system of reverse resistance type IGCT driving function, and relates to the technical field of direct current transmission.The valve control host detects the driving up-sent IGCT forward voltage signal, and the delay input / exit test mode is put into operation.The valve tester is divided into multiple rounds of statistical stages and trigger stages, and the forward voltage signal statistics are realized, so that multiple test function verifications are realized.The valve tester verification method and system of reverse resistance type IGCT driving function are aimed at the characteristics that the IGCT driving energy taking time is long and cannot be automatically turned off, realize the effect that the valve tester identifies test items and matches control time sequences under the condition that the valve tester does not directly communicate with the valve control host or the IGCT driving, and satisfies the test requirements of comprehensive testing of the reverse resistance type IGCT driving performance.

Description

Technical Field

[0001] This invention relates to a method and system for verifying the valve tester with reverse resistance type IGCT drive function, belonging to the field of DC transmission equipment testing technology. Background Technology

[0002] Thyristor converter valves are currently widely used in conventional DC transmission and ultra-high voltage DC transmission projects. For thyristor units and their actuators, a dedicated valve testing instrument is required to verify the triggering, feedback, and protection functions of the actuator through multiple experiments. The inverse resistance type IGCT (Integrated Gate-Commutated Thyristor), as a new type of controllable turn-off device, can replace thyristors in the formation of IGCT converter valves.

[0003] Compared to conventional thyristor drivers based on analog circuit design, IGCT drivers, which have both turn-on and turn-off functions and need to consider more complex abnormal operating conditions to protect IGCT devices from failure, require digital circuit and chip design.

[0004] The complex circuitry of the IGCT driver increases power consumption, thus requiring a higher AC voltage for rapid power-up via the RC circuit (the actual charging voltage of the converter valve can meet the requirements). However, in production debugging scenarios using low-voltage valve testers, it takes a considerable amount of time (e.g., seconds) for the IGCT to gain power and operate normally, generating a feedback signal after the AC voltage is applied. This time is only approximate and varies each time it is powered on.

[0005] Therefore, the process of the valve tester providing AC voltage power-on—IGCT drive energy extraction and start-up—IGCT drive start-up completes the process of having the trigger conditions and generating a feedback signal is completed immediately after the first power frequency cycle after power-on during thyristor testing, while the power-on time is longer and the time variation range is large during IGCT testing.

[0006] This results in the valve tester and the valve control host not communicating with each other, making it impossible to unify the start time of the experiment. Experimental methods that restart timing upon power-on and those that use repeated power-on to automatically perform tests sequentially will cause inconsistencies in timing between the two sides, preventing the valve tester from operating and performing tests correctly.

[0007] However, the solution of mutual communication (usually optical fiber) is not conducive to engineering applications. The optical fiber from the secondary equipment room to the valve hall and valve tower is not only expensive, but also cumbersome in daily storage, maintenance and preparation before experiments.

[0008] Therefore, the IGCT has the characteristics of long drive power harvesting time and no automatic shutdown, as well as the need to complete the comprehensive test of drive performance without direct communication between the valve tester and the drive and valve control host, which brings challenges to the timing function design of the valve tester and valve control host.

[0009] Therefore, it is necessary to design a valve tester verification method that can achieve time synchronization and synchronous entry and exit from the experiment without mutual communication. Summary of the Invention

[0010] Objective: To overcome the shortcomings of the existing technology, the present invention provides a valve tester verification method and system with reverse resistance IGCT drive function, so as to solve the problem of incompatibility between thyristor valve testers and reverse resistance IGCT drive and valve control unit.

[0011] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0012] Firstly, a verification method for a valve tester with a reverse-resistance type IGCT drive function specifically includes:

[0013] Step 1: The valve control unit is enabled in test mode via remote control. After the test mode is enabled, the system counts the IGCT positive voltage signal sent by the connected IGCT drive module. When the system detects that the IGCT drive module is continuously sending an IGCT positive voltage signal, a delay t is set. on Automatic trial mode.

[0014] Step 2: After the valve control host is put into test mode, the valve tester outputs AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of statistical stage is completed.

[0015] Step 3: After the valve control host completes the first round of statistical phase, in the first round of trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the second round of statistical phase. After the number of IGCT positive voltage signals reaches n, the second round of statistical phase is completed.

[0016] Step 4: After the valve control host completes the second round of statistical phase, in the second round of trigger phase, after receiving the IGCT positive voltage signal, it will periodically issue IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the trigger is completed, it will enter the third round of statistical phase. After the number of IGCT positive voltage signals reaches n, the third round of statistical phase is completed.

[0017] Step 5: After the valve control unit completes the third round of statistical phase, it calculates the IGCT positive voltage signal interval and the preset threshold value T based on the second round of triggering phase. ref Based on the comparison results, the corresponding trigger mode is selected in the third triggering phase. After receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are sent out at regular intervals. After the valve tester detects the current waveform in the triggering phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first statistical phase and repeat steps 2 to 5.

[0018] Optionally, it also includes: when the duration is t off Within the specified time frame, if the valve control host fails to detect a continuous positive voltage signal from the IGCT drive module, it will automatically exit the test mode, and the valve tester will manually or automatically end the experiment and power off.

[0019] Optionally, the timing parameters for the IGCT active turn-on and active turn-off trigger commands issued by the valve control host in each trigger phase can be set independently and adjusted according to the test feedback results under different test conditions.

[0020] Optionally, when the valve tester enters the short-circuit test, the test duration is set within the range of t0+t. on +ΔT to t0+t on Within +nT-ΔT, no trigger current threshold I was detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages.

[0021] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0022] Optionally, when the valve tester enters the positive polarity impact withstand test or the negative polarity impact withstand test, the test duration is set within the range of t0+t, referring to the short-circuit test sequence. on +ΔT to t0+t on Within +nT‐ΔT, positive or negative impulse voltages are applied to the cathode and anode of the test IGCT during the appropriate voltage phase, respectively. No trigger current threshold I is detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages.

[0023] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0024] Optionally, when the valve tester performs a low-pressure trigger test, the maximum test duration is set to t0+t. on +(n+2)T+ΔT to t0+t on Within +(2n+2)T‐ΔT, the trigger current I was detected during the test duration. ref If the current is tested and passes, the valve tester disconnects the voltage between the IGCT anode and cathode to stop the test.

[0025] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0026] Optionally, when the valve tester performs a reverse recovery period endurance test or a reverse recovery period end-of-test, the maximum test duration is set to t0+t. on +(2n+4)T+ΔT to t0+t on Within +(3n+4)T‐ΔT, during the test duration, the valve tester detects the triggering phase through trigger voltage and current detection. After the IGCT is turned off in the second power frequency cycle of the second triggering phase, the valve tester applies a positive polarity impulse voltage according to the preset parameters in the negative pressure phase. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0027] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0028] Optionally, when the valve tester performs a current discontinuity test, the maximum test duration is set to t0+t. on +(3n+6)T+ΔT to t0+t on Within +(4n+6)T‐ΔT, during the test duration, the valve tester detects the triggering phase through trigger voltage and current detection. In the second cycle of the second round, during the triggering completion phase, the valve tester applies a low-value positive impulse voltage according to preset parameters, causing the valve control host to detect that the interval between the IGCT positive voltage signals during the triggering phase is less than T. ref In the third round of a trigger cycle, the valve control host issues IGCT turn-on and turn-off trigger commands with short intervals according to the preset parameters of the current discontinuity test to achieve current discontinuity. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0029] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0030] Optionally, when the valve tester performs a forward overvoltage protection test, the maximum test duration is set to t0+t. on +(3n+6)T+ΔT to t0+t on Within +(4n+6)T‐ΔT, the valve tester only provides power frequency voltage in the second round, and the valve control host does not detect the interval between adjacent IGCT positive voltage signals less than T during the triggering phase in the second round. ref In the third round of triggering cycle, the valve control host issues IGCT active turn-on and active turn-off trigger commands at preset parameters. The valve tester applies a positive polarity impulse voltage test at the voltage zero crossing point of the second power frequency cycle in the third round of triggering phase according to preset parameters. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0031] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

[0032] Secondly, a valve testing and verification device for reverse-resistance type IGCT drive function specifically includes:

[0033] Preparation module: Used to enable the valve control host to enter test mode via remote control. After the test mode is enabled, it counts the IGCT positive voltage signal sent by the connected IGCT drive module. When the continuous sending of the IGCT positive voltage signal by the IGCT drive module is detected, a delay t is set. on Automatic trial mode.

[0034] The first round module: After the valve control host is put into test mode, the valve tester outputs AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of statistical stage is completed.

[0035] The second-round module is used after the valve control host completes the first round of statistical phase. In the first round of trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the second round of statistical phase. After the number of IGCT positive voltage signals reaches n, the second round of statistical phase is completed.

[0036] The third-round module is used after the valve control host completes the second-round statistical phase. In the second-round trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the third-round statistical phase. After the number of IGCT positive voltage signals reaches n, the third-round statistical phase is completed.

[0037] The fourth-round module: After the valve control host completes the third-round statistical phase, it calculates the interval between the IGCT positive voltage signals from the second-round triggering phase and the preset threshold value T. ref Based on the comparison results, the corresponding trigger mode is selected during the third triggering phase. After receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are issued at regular intervals. After the valve tester detects the current waveform during the triggering phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first round of statistical phase and repeat the first round module to the fourth round module.

[0038] Thirdly, a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a valve tester verification method for a reverse-resistance type IGCT drive function as described in any of the first aspects.

[0039] Fourthly, a computer device comprising:

[0040] Memory is used to store instructions.

[0041] A processor is configured to execute the instructions, causing the computer device to perform the operation of a valve tester verification of a reverse-resistance IGCT drive function as described in any of the first aspects.

[0042] Beneficial Effects: This invention provides a valve tester verification method and system for reverse-resistance IGCT drive function, relating to the field of DC power transmission technology. In this method, the valve control host detects and drives the IGCT forward voltage signal, delays the entry / exit of the test mode, and the valve tester verifies multiple test functions through multi-round statistical and triggering phases, as well as forward voltage signal statistics. Addressing the characteristics of long IGCT drive power harvesting time and inability to automatically shut off, this invention achieves synchronized test start time, identification of test items, and matching of control timing without direct communication between the valve tester and the valve control host or IGCT drive, thus meeting the test requirements for comprehensive performance testing of reverse-resistance IGCT drives. Attached Figure Description

[0043] Figure 1 This is a wiring diagram of a reverse-resistance type IGCT driven functional valve tester according to the present invention.

[0044] Figure 2 This is a schematic diagram of a test mode for a valve control unit according to the present invention.

[0045] Figure 3 This is a timing diagram of each stage of testing according to the present invention.

[0046] Figure 4 This is a schematic diagram of the timing of a reverse recovery period tolerance test according to the present invention.

[0047] Figure 5 This is a schematic diagram of the timing of a current discontinuity test according to the present invention.

[0048] Figure 6 This is a schematic diagram of a forward overvoltage protection timing according to the present invention.

[0049] Figure 7 This is a schematic diagram of the structure of a valve tester verification device for reverse resistance type IGCT drive function according to the present invention. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0051] The present invention will be further described below with reference to specific embodiments.

[0052] Example 1:

[0053] This embodiment introduces a valve testing system with reverse resistance type IGCT drive function, such as... Figure 1 As shown, it includes: a valve tester, an IGCT drive module, a valve control unit, and a reverse resistance type IGCT.

[0054] The valve control host is connected to the IGCT drive module via trigger fiber and return fiber, and is used for the test mode of receiving return signals and sending trigger signals.

[0055] The valve tester is connected to the cathode and anode on both sides of the reverse resistance IGCT. It is used to connect the reverse resistance IGCT to be tested into the test circuit and measure the voltage between the cathode and anode of the reverse resistance IGCT and the current flowing through the reverse resistance IGCT.

[0056] The valve tester does not have a direct signal communication line connection with the valve control host or IGCT drive module.

[0057] The valve tester has the capability to perform short-circuit tests, low-voltage trigger tests, current discontinuity tests, reverse recovery period withstand tests, reverse recovery period end withstand tests, positive polarity impulse withstand tests, negative polarity impulse withstand tests, and positive overvoltage protection tests. The valve tester supports individual test items and also supports continuous testing of all test items in automatic mode.

[0058] like Figure 2 As shown, the valve control host has a test mode that works with the valve tester. When the test mode is activated, the valve tester and the valve control host detect the positive voltage signal sent by the drive and send a triggering command according to the timing logic in the verification method of this invention.

[0059] The valve tester is used to perform various tests and to set a time limit for the test to exit without triggering for an extended period. It controls the supply and disconnection of AC voltage. For a few tests, such as the positive polarity impulse withstand test, reverse recovery period withstand test, or reverse recovery period end withstand test, a transient positive impulse voltage is provided at a set AC voltage angle. The negative polarity impulse withstand test provides a transient reverse impulse voltage. The testing method for each test typically involves detecting IGCT conduction within a given time range after timing begins; this indicates the test has passed. However, for some tests, failure to detect IGCT conduction within a given time range indicates a short-circuit test or withstand test has passed.

[0060] Example 2:

[0061] This embodiment describes a method for verifying the valve tester's drive function using a reverse-resistance type IGCT, such as... Figure 3 As shown, it specifically includes:

[0062] Step 1: The valve control unit is enabled in test mode via remote control. After the test mode is enabled, the system counts the IGCT positive voltage signal sent by the connected IGCT drive module. When the system detects that the IGCT drive module is continuously sending an IGCT positive voltage signal, a delay t is set. on Automatically initiate test mode; when the duration is t off If no IGCT positive voltage signal is continuously sent by the IGCT drive module within the time range, the test mode will automatically exit and the valve tester will manually or automatically end the experiment and power off.

[0063] Step 2: After the valve control host is put into test mode, the valve tester outputs AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of statistical stage is completed.

[0064] Step 3: After the valve control host completes the first round of statistical phase, in the first round of trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the second round of statistical phase. After the number of IGCT positive voltage signals reaches n, the second round of statistical phase is completed.

[0065] Step 4: After the valve control host completes the second round of statistical phase, in the second round of trigger phase, after receiving the IGCT positive voltage signal, it will periodically issue IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the trigger is completed, it will enter the third round of statistical phase. After the number of IGCT positive voltage signals reaches n, the third round of statistical phase is completed.

[0066] Step 5: After the valve control unit completes the third round of statistical phase, it calculates the IGCT positive voltage signal interval and the preset threshold value T based on the second round of triggering phase. ref Based on the comparison results, the corresponding trigger mode is selected in the third triggering phase. After receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are sent out at regular intervals. After the valve tester detects the current waveform in the triggering phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first statistical phase and repeat steps 2 to 5.

[0067] Furthermore, the timing parameters for the IGCT active turn-on and active turn-off trigger commands issued by the valve control host in each trigger phase can be set independently and flexibly adjusted according to the test feedback results under different test conditions.

[0068] Furthermore, when the valve tester enters the short-circuit test, the test duration is set within the range of t0+t. on +ΔT to t0+t on Within +nT-ΔT, no trigger current threshold I was detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages.

[0069] Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, and ΔT is the maximum difference between the power-on time and t0 for different IGCT drives.

[0070] Furthermore, when the valve tester enters the positive polarity impact withstand test or the negative polarity impact withstand test, referring to the short-circuit test sequence, the test duration is set within the range of t0+t. on +ΔT to t0+t onWithin +nT‐ΔT, positive or negative impulse voltages are applied to the cathode and anode of the test IGCT during the appropriate voltage phase, respectively. No trigger current threshold I is detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages.

[0071] Furthermore, when the valve tester performs a low-pressure trigger test, the maximum test duration is set within the range of t0+t. on +(n+2)T+ΔT to t0+t on Within +(2n+2)T‐ΔT, the trigger current I was detected during the test duration. ref If the current is tested and passes, the valve tester disconnects the voltage between the IGCT anode and cathode to stop the test.

[0072] Furthermore, such as Figure 4 As shown, when the valve tester performs a reverse recovery period endurance test or a reverse recovery period end-of-test, the maximum test duration is set within the range of t0+t. on +(2n+4)T+ΔT to t0+t on Within +(3n+4)T‐ΔT, during the test duration, the valve tester detects the triggering phase through trigger voltage and current detection. After the IGCT is turned off in the second power frequency cycle of the second triggering phase, the valve tester applies a positive polarity impulse voltage according to the preset parameters in the negative pressure phase. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0073] Furthermore, such as Figure 5 As shown, when the valve tester performs a current discontinuity test, the maximum test duration is set within the range of t0+t. on +(3n+6)T+ΔT to t0+t on Within +(4n+6)T‐ΔT, during the test duration, the valve tester detects the triggering phase through trigger voltage and current detection. In the second cycle of the second round, during the triggering completion phase, the valve tester applies a low-value positive impulse voltage according to preset parameters, causing the valve control host to detect that the interval between the IGCT positive voltage signals during the triggering phase is less than T. ref In the third round of a trigger cycle, the valve control host issues IGCT turn-on and turn-off trigger commands with short intervals according to the preset parameters of the current discontinuity test to achieve current discontinuity. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0074] Furthermore, such as Figure 6 As shown, the maximum duration of the positive overvoltage protection test performed by the valve tester is set to t0+t. on +(3n+6)T+ΔT to t0+t onWithin +(4n+6)T‐ΔT, the valve tester only provides power frequency voltage in the second round, and the valve control host does not detect the interval between adjacent IGCT positive voltage signals less than T during the triggering phase in the second round. ref In the third round of triggering cycle, the valve control host issues IGCT active turn-on and active turn-off trigger commands at preset parameters. The valve tester applies a positive polarity impulse voltage test at the voltage zero crossing point of the second power frequency cycle in the third round of triggering phase according to preset parameters. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages.

[0075] Furthermore, in the parameters of the valve tester mode, the average time t0 from power-on to energy harvesting by the IGCT drive module and the maximum deviation ΔT between the power-on time and t0 for different IGCT drive units are provided by the IGCT drive manufacturer. T is the cycle of the AC power frequency voltage used in the test, and n is the number of times the IGCT positive voltage signal is counted in the valve tester mode. When setting the test parameters, nT > 2ΔT must be satisfied to ensure that the upper and lower limits of the parameters are valid.

[0076] Example 3:

[0077] This embodiment introduces a valve testing and verification device for reverse-resistance type IGCT drive function, such as... Figure 7 As shown, it specifically includes:

[0078] Preparation module: Used to enable the valve control host to enter test mode via remote control. After the test mode is enabled, it counts the IGCT positive voltage signal sent by the connected IGCT drive module. When the continuous sending of the IGCT positive voltage signal by the IGCT drive module is detected, a delay t is set. on Automatic trial mode.

[0079] The first round module: After the valve control host is put into test mode, the valve tester outputs AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of statistical stage is completed.

[0080] The second-round module is used after the valve control host completes the first round of statistical phase. In the first round of trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the second round of statistical phase. After the number of IGCT positive voltage signals reaches n, the second round of statistical phase is completed.

[0081] The third-round module is used after the valve control host completes the second-round statistical phase. In the second-round trigger phase, after receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. After the valve tester detects the current waveform in the trigger phase, it confirms that the reverse resistance IGCT is triggered and turned on. After the trigger is completed, it enters the third-round statistical phase. After the number of IGCT positive voltage signals reaches n, the third-round statistical phase is completed.

[0082] The fourth-round module: After the valve control host completes the third-round statistical phase, it calculates the interval between the IGCT positive voltage signals from the second-round triggering phase and the preset threshold value T. ref Based on the comparison results, the corresponding trigger mode is selected during the third triggering phase. After receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are issued at regular intervals. After the valve tester detects the current waveform during the triggering phase, it confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first round of statistical phase and repeat the first round module to the fourth round module.

[0083] Example 4:

[0084] This embodiment describes a computer-readable storage medium storing a computer program that, when executed by a processor, implements a valve tester verification method for a reverse-resistance type IGCT drive function as described in any of Embodiment 2.

[0085] Example 5:

[0086] This embodiment describes a computer device, including:

[0087] Memory is used to store instructions.

[0088] A processor is configured to execute the instructions, causing the computer device to perform the operation of a valve tester verification of a reverse-resistance IGCT drive function as described in any of Embodiment 2.

[0089] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for verifying a valve tester of an inverse blocking IGCT drive function, characterized by: Specifically, it includes: Step 1: the valve control host is enabled in test mode, and the IGCT positive voltage signal of the accessed IGCT drive module is uploaded, and when the IGCT drive module continuously uploads the IGCT positive voltage signal is detected, delay t on Automatic test mode is enabled; Step 2: The valve tester outputs AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of counting is completed. Step 3: In the first round of triggering, after receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are sent at regular intervals. The valve tester confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, the second round of statistics is entered. After the number of IGCT positive voltage signals reaches n, the second round of statistics is completed. Step 4: In the second round of triggering, after receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off trigger commands are sent at regular intervals. The valve tester confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, the third round of statistics is entered. After the number of IGCT positive voltage signals reaches n, the third round of statistics is completed. Step 5: Based on the interval of the IGCT positive voltage signal in the second round of triggering phase and the preset threshold value T ref Based on the comparison results, in the third triggering phase, the corresponding triggering mode is selected; after receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off triggering commands are sent at regular intervals. The valve tester confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first statistical phase and repeat steps 2 to 5.

2. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: Also includes: When continuously t off When the valve control host detects no IGCT drive module continuously sending IGCT forward voltage signal within the time range, it automatically exits the test mode, and the valve tester manually or automatically ends the experiment and powers off.

3. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: The timing parameters for the IGCT active turn-on and active turn-off trigger commands issued by the valve control host in each trigger phase can be set independently and adjusted according to the test feedback results under different test conditions.

4. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: When the valve tester enters the short-circuit test, the test duration is set within the range of t0+t. on + Δ T to t0+t on +nT‐ Δ Within T, no trigger current threshold I was detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages; Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive. Δ T represents the maximum difference between the power-on time and t0 for different IGCT drives, and T represents the cycle of the AC voltage used in the test.

5. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: When the valve tester enters the positive polarity impact withstand test or the negative polarity impact withstand test, refer to the short-circuit test sequence, and set the test duration range to t0+t. on + Δ T to t0+t on +nT‐ Δ Within T, positive or negative impulse voltages are applied to the cathode and anode of the test IGCT during the appropriate voltage phase. No trigger current threshold I is detected during the test duration. ref The current test passed, and after the test was completed, the valve tester disconnected the IGCT cathode and anode voltages; Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

6. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: When the valve tester performs a low voltage trigger test, the test maximum duration range is set between t0 + t on +(n+2)T+ΔT and t0 + t on +(2n+2)T−ΔT, and the current reaching the trigger current I ref is detected within the test duration, the test is passed, and the valve tester turns off the IGCT anode and cathode voltage to terminate the test. Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

7. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: When the valve tester carries out reverse recovery period endurance test or reverse recovery period end endurance test, the test maximum duration range is set within t0+t on +(2n+4)T+ΔT to t0+t on +(3n+4)T-ΔT, the valve tester detects the trigger stage by triggering voltage and current during the test duration, and the valve tester applies a positive polarity impulse voltage according to preset parameters after the IGCT is turned off in the second power frequency cycle of the second trigger stage, and the valve tester disconnects the IGCT anode and cathode voltage after the test is completed. Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

8. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: When the valve tester performs a current discontinuity test, the maximum test duration is set to t0+t. on +(3n+6)T+ΔT to t0+t on Within +(4n+6)T‐ΔT, during the test duration, the valve tester detects the triggering phase through trigger voltage and current detection. In the second cycle of the second round, during the triggering completion phase, the valve tester applies a low-value positive impulse voltage according to preset parameters, causing the valve control host to detect that the interval between the IGCT positive voltage signals during the triggering phase is less than T. ref In the third round of a trigger cycle, the valve control host issues IGCT turn-on and turn-off trigger commands with short intervals according to the preset parameters of the current discontinuity test to achieve current discontinuity. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages. Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

9. The verification method for a valve tester with reverse resistance type IGCT drive function according to claim 1, characterized in that: The duration of the positive overvoltage protection test performed by the valve tester is set to the maximum test duration range of t0+t. on +(3n+6)T+ΔT to t0+t on Within +(4n+6)T‐ΔT, the valve tester only provides power frequency voltage in the second round, and the valve control host does not detect the interval between adjacent IGCT positive voltage signals less than T during the triggering phase in the second round. ref In the third round of triggering cycle, the valve control host sends IGCT active turn-on and active turn-off trigger commands at preset parameters. The valve tester applies a positive polarity impulse voltage test at the voltage zero crossing point of the second power frequency cycle in the third round of triggering phase according to preset parameters. After the test is completed, the valve tester disconnects the IGCT cathode and anode voltages. Where: t0 is the average time from power-on to completion of energy harvesting by the IGCT drive, ΔT is the maximum difference between the power-on time and t0 for different IGCT drives, and T is the cycle of the power frequency AC voltage used in the test.

10. A method for verifying the valve tester with reverse resistance type IGCT drive function according to any one of claims 4 to 9, characterized in that: When setting the experimental parameters, nT > 2ΔT must be satisfied.

11. A valve testing and verification device for reverse-resistance type IGCT drive function, characterized in that: Specifically, it includes: Preparation module: for the valve control host to enable test mode, statistics access IGCT drive module to send IGCT positive voltage signal, when detecting IGCT drive module to send IGCT positive voltage signal continuously, delay t on Automatic test mode; The first module is used for the valve tester to output AC voltage to the reverse resistance type IGCT. The valve control host counts the number and interval of the IGCT positive voltage signals sent by the IGCT drive module. After the number of counts of the IGCT positive voltage signals reaches n, the first round of counting is completed. The second-round module is used in the first-round triggering phase. After receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. The valve tester confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, it enters the second-round statistical phase. After the number of IGCT positive voltage signals reaches n, the second-round statistical phase is completed. The third round module is used in the second round triggering phase. After receiving the IGCT positive voltage signal, it periodically sends IGCT active turn-on and active turn-off trigger commands. The valve tester confirms that the reverse resistance type IGCT is triggered and turned on. After the triggering is completed, it enters the third round statistical phase. After the number of IGCT positive voltage signals reaches n, the third round statistical phase is completed. Fourth-round module: used to determine the interval of the IGCT positive voltage signal during the second-round triggering phase and the preset threshold value T. ref Based on the comparison results, in the third triggering phase, the corresponding triggering mode is selected; after receiving the IGCT positive voltage signal, the IGCT active turn-on and active turn-off triggering commands are issued at regular intervals. The valve tester confirms that the reverse resistance type IGCT is triggered and conducted. After the triggering is completed, if the valve control host does not exit the test mode, it will return to the first statistical phase and repeat the test process corresponding to the first to fourth round modules.

12. A computer-readable storage medium, characterized in that: It stores a computer program, which, when executed by a processor, implements a valve tester verification method for a reverse-resistance type IGCT drive function as described in any one of claims 1 to 10.

13. A computer device, characterized in that: include: Memory, used to store instructions; A processor is configured to execute the instructions, causing the computer device to perform the operation of a valve tester verification of a reverse-resistance IGCT drive function as described in any one of claims 1 to 10.

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