Aperiodic trigger test device and method for controllable commutation converter valve

Abstract

The invention provides a controllable commutation converter valve aperiodic trigger test device and method. The controllable commutation converter valve aperiodic trigger test device comprises a power frequency test transformer, a controllable commutation converter valve auxiliary valve, an impact generation device, a first rapid mechanical switch and a second rapid mechanical switch. The power frequency test transformer, the auxiliary valve of the controllable commutation converter valve, the tested sample valve of the controllable commutation converter valve and the impact generation device are sequentially connected in parallel; one end of the first rapid mechanical switch is connected with the anode of the tested controllable commutation converter valve sample valve, and the other end of the first rapid mechanical switch is connected with the impact generation device; and one end of the second rapid mechanical switch is connected with the anode of the tested controllable commutation converter valve sample valve, and the other end of the second rapid mechanical switch is connected with the cathode of the controllable commutation converter valve auxiliary valve. According to the technical scheme provided by the invention, the simultaneous energy taking of the IGBT element and the thyristor board card in the test is realized, the electrical isolation of the power frequency test transformer and the impact generation device is also realized, and the safe and reliable development of the aperiodic trigger test of the controllable commutation converter valve is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of controllable commutation converters, and particularly relates to a non-periodic triggering test device and method for a controllable commutation converter valve. Background Art

[0002] The controllable commutation converter valve, abbreviated as CLCC valve, refers to a converter that uses a combination of semi-controlled devices and fully-controlled devices to actively turn off the current through the fully-controlled devices to achieve the controllable commutation function. The topology of the CLCC converter valve is as Figure 1 shown, which is mainly composed of a main branch and an auxiliary branch connected in parallel. The main branch is composed of a conventional thyristor valve V1 in series with a low-voltage IGBT valve V2, and the auxiliary branch is composed of a high-voltage IGBT valve V3 and a high-voltage thyristor valve V4 in series.

[0003] For the existing conventional thyristor converter valve, the impulse test energizes the control board of the test valve through a power frequency test transformer to make the board in a normal working state. The FOP function of the board can protect the series thyristor elements in the test valve from being broken down when they withstand a relatively high impulse voltage under extreme working conditions. The energizing voltage of the board of the conventional thyristor converter valve is relatively low, about 100V, and the voltage sharing among elements is relatively good. Therefore, for the conventional thyristor converter valve, the power frequency test transformer only needs to provide a relatively low-level alternating voltage to meet the test requirements.

[0004] Different from the conventional thyristor converter valve, both the main and auxiliary branches in the single valve of the CLCC converter valve are composed of a thyristor sub-valve and an IGBT sub-valve connected in series, and the resistance value of the voltage-sharing resistor configured for the thyristor sub-valve is much higher than that of the IGBT sub-valve. Therefore, when a voltage is applied to the single valve of the CLCC converter valve, the thyristor sub-valve will bear most of the voltage, while the voltage division of the IGBT sub-valve is very low. If the existing impulse test device for the conventional thyristor converter valve is used, the requirement of simultaneously energizing the boards of the thyristor sub-valve and the IGBT sub-valve cannot be met. If the voltage level of the power frequency test transformer is increased to make the voltage of the IGBT sub-valve reach the energizing requirement, due to the influence of the voltage division effect, the voltage of the thyristor sub-valve will be very high at this time. When a reverse impulse voltage is applied to the test valve, the impulse voltage superimposed on the too high AC energizing voltage may cause serious faults such as device breakdown. Summary of the Invention

[0005] To overcome the problems existing in the above related technologies, the present application provides a non-periodic triggering test device and method for a controllable commutation converter valve.

[0006] According to the first aspect of the embodiments of the present application, a non-periodic triggering test device for a controllable commutation converter valve is provided, including: a power frequency test transformer, a controllable commutation converter valve auxiliary valve, an impulse generating device, a first fast mechanical switch, and a second fast mechanical switch;

[0007] The power frequency test transformer, the controllable commutation valve auxiliary valve, the test valve of the controllable commutation valve to be measured, and the impulse generating device are connected in parallel in sequence;

[0008] One end of the first fast mechanical switch is connected to the anode of the test valve of the controllable commutation valve to be measured, and the other end is connected to the impulse generating device;

[0009] One end of the second fast mechanical switch is connected to the anode of the test valve of the controllable commutation valve to be measured, and the other end is connected to the cathode of the controllable commutation valve auxiliary valve;

[0010] The first fast mechanical switch is used to control the input and output of the power frequency test transformer;

[0011] The second fast mechanical switch is used to control the input and output of the impulse generating device;

[0012] The impulse generating device is used to generate an impulse voltage applied to the test valve of the controllable commutation valve to be measured;

[0013] The power frequency test transformer is used to charge the drive board in the test valve of the controllable commutation valve to be measured;

[0014] The controllable commutation valve auxiliary valve is used to assist the test valve of the controllable commutation valve to be measured to complete the valve electromagnetic compatibility test.

[0015] Preferably, it further includes: a wave-shaping inductor, a current-limiting resistor, and a second capacitor;

[0016] One end of the wave-shaping inductor is connected to the other end of the first fast mechanical switch, and the other end is connected to the impulse generating device;

[0017] The connection point between one end of the wave-shaping inductor and the first fast mechanical switch is connected to one end of the current-limiting resistor, and the other end of the current-limiting resistor is connected to the second capacitor;

[0018] The second capacitor is grounded.

[0019] Preferably, the impulse generating device includes: a wave-tail resistor, a wave-front resistor, a first capacitor, and an isolating sphere gap;

[0020] One end of the wave-front resistor is connected to the isolating sphere gap, and the other end is connected to the other end of the wave-shaping inductor;

[0021] The first capacitor and the wave-tail resistor are connected in parallel at both ends of the isolating sphere gap, and the connection point between the first capacitor and the wave-tail resistor is connected to the second capacitor.

[0022] Preferably, the controllable commutation valve auxiliary valve includes: a first saturable reactor, a first thyristor, and a first IGBT element connected in sequence, and a second saturable reactor, a second thyristor, and a second IGBT element connected in sequence;

[0023] The first saturable reactor is connected to the second saturable reactor, and one end where the first saturable reactor and the second saturable reactor are interconnected constitutes the cathode of the controllable commutation valve auxiliary valve;

[0024] The first IGBT element is connected to the second IGBT element, and one end where the first IGBT element and the second IGBT element are interconnected constitutes the anode of the controllable commutation valve auxiliary valve.

[0025] Preferably, the test valve of the controllable commutation valve to be measured includes: a main branch and an auxiliary branch connected in parallel; the main branch includes: a third saturable reactor, a third thyristor, and a third IGBT element connected in sequence; the auxiliary branch includes: a fourth saturable reactor, a fourth thyristor, and a fourth IGBT element connected in sequence;

[0026] The third saturable reactor is connected to the fourth saturable reactor, and one end where the third saturable reactor and the fourth saturable reactor are interconnected constitutes the anode of the test valve of the controllable commutation valve to be measured;

[0027] The third IGBT element is connected to the fourth IGBT element, and one end where the third IGBT element and the fourth IGBT element are interconnected constitutes the cathode of the test valve of the controllable commutation valve to be measured.

[0028] According to the third aspect of the embodiments of the present application, a method for non-periodic triggering test of a controllable commutation valve is provided, which is applied to the above-mentioned non-periodic triggering test device for a controllable commutation valve. The method includes:

[0029] By controlling the opening or closing of the first fast mechanical switch and the second fast mechanical switch, the input and output of the power frequency test transformer and the impulse generating device are controlled to perform a non-periodic triggering test on the test valve of the controllable commutation valve to be measured.

[0030] Preferably, the step of controlling the opening or closing of the first fast mechanical switch and the second fast mechanical switch to control the input and output of the power frequency test transformer and the impulse generating device to perform a non-periodic triggering test on the test valve of the controllable commutation valve to be measured includes:

[0031] Control the first fast mechanical switch to open and the second fast mechanical switch to close, so that the power frequency test transformer charges the drive boards in the test valve of the controllable commutation valve to be measured and the controllable commutation valve auxiliary valve;

[0032] When the charging of the drive boards in the valve under test of the controllable phase - commutation converter valve and the auxiliary valve of the controllable phase - commutation converter valve is completed, control the first fast mechanical switch to close and control the second fast mechanical switch to open, so that the valve under test of the controllable phase - commutation converter valve enters the natural discharge state;

[0033] When the time for the valve under test of the controllable phase - commutation converter valve to enter the natural discharge state reaches the second preset time, control the first fast mechanical switch to remain closed, the second fast mechanical switch to remain open, and control the impulse generating device to generate an impulse voltage applied to the valve under test of the controllable phase - commutation converter valve;

[0034] When the impulse voltage reaches the preset voltage peak value, trigger the thyristors and IGBT components in the main branch of the valve under test of the controllable phase - commutation converter valve. The energy on the second capacitor is converted into current for the valve under test of the controllable phase - commutation converter valve until the impulse voltage drops to the first preset voltage range, then turn off the IGBT components in the main branch of the valve under test of the controllable phase - commutation converter valve, and after the third preset time, control the first fast mechanical switch to open and the second fast mechanical switch to close to end the aperiodic triggering test of the valve under test of the controllable phase - commutation converter valve.

[0035] Preferably, when the charging of the drive boards in the valve under test of the controllable phase - commutation converter valve and the auxiliary valve of the controllable phase - commutation converter valve is completed, controlling the first fast mechanical switch to close and the second fast mechanical switch to open includes:

[0036] When the charging of the drive boards in the valve under test of the controllable phase - commutation converter valve and the auxiliary valve of the controllable phase - commutation converter valve is completed, control the first fast mechanical switch to close, and after the first preset time, control the second fast mechanical switch to open, so that the valve under test of the controllable phase - commutation converter valve enters the natural discharge state. The power frequency test transformer continuously charges the auxiliary valve of the controllable phase - commutation converter valve, and the impulse generating device does not participate in the work;

[0037] Among them, the first preset time is greater than the action time for the second fast mechanical switch to open.

[0038] Preferably, controlling the impulse generating device to generate an impulse voltage applied to the valve under test of the controllable phase - commutation converter valve includes:

[0039] Adjust the wavefront resistance, wave - tail resistance and wave - adjusting inductor so that the impulse generating device generates an impulse voltage applied to the valve under test of the controllable phase - commutation converter valve.

[0040] Preferably, the second preset time is greater than the time required for the board voltages of all thyristors and IGBT components in the valve under test of the controllable phase - commutation converter valve to drop to the second preset voltage range, and less than the power - off maintenance time of the boards of all thyristors and IGBT components in the valve under test of the controllable phase - commutation converter valve;

[0041] The third preset time is greater than the turn-off time of the IGBT components in the main branch of the test valve of the controllable commutation and conversion valve to be tested.

[0042] According to the third aspect of the embodiments of the present application, a computer device is provided, including: one or more processors;

[0043] The processor is used to store one or more programs;

[0044] When the one or more programs are executed by the one or more processors, the aperiodic triggering test method of the controllable commutation and conversion valve is implemented.

[0045] According to the fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed, the aperiodic triggering test method of the controllable commutation and conversion valve is implemented.

[0046] One or more of the above technical solutions of the present invention have at least one or more of the following beneficial effects:

[0047] The present invention provides an aperiodic triggering test device and method for a controllable commutation and conversion valve. The device includes: a power frequency test transformer, a controllable commutation and conversion valve auxiliary valve, an impact generating device, a first fast mechanical switch, and a second fast mechanical switch; the power frequency test transformer, the controllable commutation and conversion valve auxiliary valve, the test valve of the controllable commutation and conversion valve to be tested, and the impact generating device are connected in parallel in sequence; one end of the first fast mechanical switch is connected to the anode of the test valve of the controllable commutation and conversion valve to be tested, and the other end is connected to the impact generating device; one end of the second fast mechanical switch is connected to the anode of the test valve of the controllable commutation and conversion valve to be tested, and the other end is connected to the cathode of the controllable commutation and conversion valve auxiliary valve; the first fast mechanical switch is used to control the input and output of the power frequency test transformer; the second fast mechanical switch is used to control the input and output of the impact generating device; the impact generating device is used to generate an impact voltage applied to the test valve of the controllable commutation and conversion valve to be tested; the power frequency test transformer is used to charge the drive board in the test valve of the controllable commutation and conversion valve to be tested; the controllable commutation and conversion valve auxiliary valve is used to assist the test valve of the controllable commutation and conversion valve to be tested to complete the valve electromagnetic compatibility test. The technical solution provided by the present invention not only realizes the simultaneous power supply of the IGBT components and the thyristor boards in the test, but also realizes the electrical isolation between the power frequency test transformer and the impact generating device, ensuring the safe and reliable development of the aperiodic triggering test of the controllable commutation and conversion valve. Description of the Drawings

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0049] Figure 1 is the topology diagram of the CLCC converter valve provided by the embodiment of the present invention;

[0050] Figure 2 is the structural block diagram of a non-periodic triggering test device for a controllable phase-shifting converter valve provided by the embodiment of the present invention;

[0051] Figure 3 is the schematic diagram of the non-periodic triggering test switch and sub-valve control signal for the controllable phase-shifting converter valve;

[0052] In the figure, S - power frequency test transformer, V2 - auxiliary valve of the controllable phase-shifting converter valve, V1 - test valve of the controllable phase-shifting converter valve to be measured, D - impulse generating device, K1 - first fast mechanical switch, K2 - second fast mechanical switch, L - wave tuning inductor, R3 - current limiting resistor, C2 - second capacitor, R1 - wave tail resistor, R2 - wave head resistor, C1 - first capacitor, 1 - isolation sphere gap, 2 - first saturable reactor, 3 - first thyristor, 4 - first IGBT element, 5 - second saturable reactor, 6 - second thyristor, 7 - second IGBT element, 8 - third saturable reactor, 9 - fourth saturable reactor, V11 - fourth thyristor, V12 - fourth IGBT element, V13 - third thyristor, V14 - third IGBT element. Specific Embodiments

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the following embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0054] Embodiment 1

[0055] The present invention provides a non-periodic triggering test device for a controllable phase-shifting converter valve, as Figure 2 shown, including:

[0056] power frequency test transformer S, auxiliary valve V2 of the controllable phase-shifting converter valve, test valve of the controllable phase-shifting converter valve to be measured, impulse generating device, first fast mechanical switch K1, and second fast mechanical switch K2;

[0057] The power frequency test transformer S, the auxiliary valve V2 of the controllable phase - commutation converter valve, the test valve V1 of the controllable phase - commutation converter valve to be measured, and the impulse generating device are connected in parallel in sequence;

[0058] One end of the first fast mechanical switch K1 is connected to the anode of the test valve V1 of the controllable phase - commutation converter valve to be measured, and the other end is connected to the impulse generating device;

[0059] One end of the second fast mechanical switch K2 is connected to the anode of the test valve V1 of the controllable phase - commutation converter valve to be measured, and the other end is connected to the cathode of the auxiliary valve V2 of the controllable phase - commutation converter valve;

[0060] The first fast mechanical switch is used to control the input and withdrawal of the power frequency test transformer;

[0061] The second fast mechanical switch is used to control the input and withdrawal of the impulse generating device;

[0062] The impulse generating device is used to generate the impulse voltage applied to the test valve of the controllable phase - commutation converter valve to be measured;

[0063] The power frequency test transformer is used to charge the drive board in the test valve of the controllable phase - commutation converter valve to be measured;

[0064] The auxiliary valve of the controllable phase - commutation converter valve is used to assist the test valve of the controllable phase - commutation converter valve to complete the valve electromagnetic compatibility test. Further, it also includes: wave - tuning inductor L, current - limiting resistor R3, and second capacitor C2;

[0065] One end of the wave - tuning inductor L is connected to the other end of the first fast mechanical switch K1, and the other end is connected to the impulse generating device;

[0066] The connection point between one end of the wave - tuning inductor L and the first fast mechanical switch K1 is connected to one end of the current - limiting resistor R3, and the other end of the current - limiting resistor R3 is connected to the second capacitor C2;

[0067] The second capacitor C2 is grounded.

[0068] Further, the impulse generating device includes: wave - tail resistor R1, wave - head resistor R2, first capacitor C1, and isolation sphere gap 1;

[0069] One end of the wave - head resistor R2 is connected to the isolation sphere gap 1, and the other end is connected to the other end of the wave - tuning inductor L;

[0070] The first capacitor C1 and the wave - tail resistor R1 are connected in parallel across the two ends of the isolation sphere gap 1, and the connection point between the first capacitor C1 and the wave - tail resistor R1 is connected to the second capacitor C2.

[0071] It should be noted that the first capacitor C1 is the body capacitor inside the impulse generating device.

[0072] Furthermore, the controllable commutation converter valve auxiliary valve V2 includes a first saturable reactor 2, a first thyristor 3, and a first IGBT element 4 connected in sequence, and a second saturable reactor 5, a second thyristor 6, and a second IGBT element 7 connected in sequence;

[0073] The first saturable reactor 2 is connected to the second saturable reactor 5, and one end where the first saturable reactor 2 and the second saturable reactor 5 are interconnected constitutes the cathode of the controllable commutation converter valve auxiliary valve V2;

[0074] The first IGBT element 4 is connected to the second IGBT element 7, and one end where the first IGBT element 4 and the second IGBT element 7 are interconnected constitutes the anode of the controllable commutation converter valve auxiliary valve V2.

[0075] Furthermore, the test valve V1 of the controllable commutation converter valve to be measured includes a main branch and an auxiliary branch connected in parallel; the main branch includes a third saturable reactor 8, a third thyristor V13, and a third IGBT element V14 connected in sequence; the auxiliary branch includes a fourth saturable reactor 9, a fourth thyristor V11, and a fourth IGBT element V12 connected in sequence;

[0076] The third saturable reactor 8 is connected to the fourth saturable reactor 9, and one end where the third saturable reactor 8 and the fourth saturable reactor 9 are interconnected constitutes the anode of the test valve V1 of the controllable commutation converter valve to be measured;

[0077] The third IGBT element V14 is connected to the fourth IGBT element V12, and one end where the third IGBT element V14 and the fourth IGBT element V12 are interconnected constitutes the cathode of the test valve V1 of the controllable commutation converter valve to be measured.

[0078] Specifically, each IGBT element is composed of an IGBT chip and a diode connected in anti-parallel.

[0079] A non-periodic triggering test device for a controllable commutation converter valve provided by the present invention can achieve stable energy extraction of the board card when the voltage division of the thyristor sub-valve and the IGBT sub-valve in the test valve V1 of the controllable commutation converter valve to be measured is uneven, and ensure the normal functions such as FOP triggering and status reporting;

[0080] A non-periodic triggering test device for a controllable commutation converter valve provided by the present invention isolates the power frequency test transformer S from the impulse generating device D by using a fast mechanical switch. The test valve V1 will not be damaged due to the superimposed excessive voltage, and at the same time, the power frequency test transformer S will not be affected by the impulse voltage, ensuring the safety of the test device and the test valve;

[0081] A non-periodic triggering test device for a controllable phase-shifting converter valve provided by the present invention isolates the auxiliary valve V2 of the controllable phase-shifting converter valve from the impulse generating device D by using a fast mechanical switch. While taking into account the electromagnetic interference resistance test of the test valve V1, the impulse overvoltage will not be applied to the auxiliary valve V2 to ensure that the auxiliary valve V2 is not damaged; and if the auxiliary valve V2 is disturbed and conducts, the power frequency voltage will not be applied to the test valve V1 to ensure that the test valve V1 is not damaged.

[0082] When the test valve V1 of the controllable phase-shifting converter valve to be measured is triggered and conducts at the impulse peak value, the auxiliary valve V2 should be in a forward-biased state. The test circuit of a non-periodic triggering test method for a controllable phase-shifting converter valve provided by the present invention fully considers this requirement, has a large adjustment range for the impulse application moment, and the impulse peak moment only needs to correspond to the positive half-wave of the power frequency voltage at both ends of the power frequency test transformer S.

[0083] A non-periodic triggering test device for a controllable phase-shifting converter valve provided by the present invention can change the output voltages of the power frequency test transformer S and the impulse generating device D according to the test requirements, and can be applicable to the non-periodic triggering tests of controllable phase-shifting converter valves with different voltage and current levels.

[0084] Embodiment 2

[0085] The present invention also provides a non-periodic triggering test method for a controllable phase-shifting converter valve, which is applied to the above non-periodic triggering test device for a controllable phase-shifting converter valve. The method includes the following steps:

[0086] By controlling the turn-off or closure of the first fast mechanical switch K1 and the second fast mechanical switch K2, the power frequency test transformer S and the impulse generating device are controlled to be put into and withdrawn, and the non-periodic triggering test of the test valve V1 of the controllable phase-shifting converter valve to be measured is carried out.

[0087] Further, by controlling the turn-off or closure of the first fast mechanical switch K1 and the second fast mechanical switch K2, the power frequency test transformer S and the impulse generating device are controlled to be put into and withdrawn, and the non-periodic triggering test of the test valve V1 of the controllable phase-shifting converter valve to be measured includes:

[0088] Step 101: Control the first fast mechanical switch K1 to be turned off and the second fast mechanical switch K2 to be closed, so that the power frequency test transformer S charges the drive boards in the test valve V1 of the controllable phase-shifting converter valve to be measured and the auxiliary valve V2 of the controllable phase-shifting converter valve.

[0089] Step 102: When the charging of the drive boards in the test valve V1 of the controllable phase-shifting converter valve to be measured and the auxiliary valve V2 of the controllable phase-shifting converter valve is completed, control the first fast mechanical switch K1 to be closed and control the second fast mechanical switch K2 to be turned off, so that the test valve V1 of the controllable phase-shifting converter valve to be measured enters the natural discharge state.

[0090] Step 103: When the time for the test valve V1 of the controllable phase - commutation converter valve under test to enter the natural discharge state reaches the second preset time, control the first fast mechanical switch K1 to remain closed and the second fast mechanical switch K2 to remain open, and control the impulse generating device to generate an impulse voltage applied to the test valve V1 of the controllable phase - commutation converter valve under test;

[0091] Step 104: When the impulse voltage reaches the preset voltage peak value, trigger the thyristor and IGBT components in the main branch of the test valve V1 of the controllable phase - commutation converter valve under test. The energy on the second capacitor C2 is converted into current for the test valve V1 of the controllable phase - commutation converter valve under test until the impulse voltage drops to the first preset voltage range, then turn off the IGBT components in the main branch of the test valve V1 of the controllable phase - commutation converter valve under test, and after the third preset time, control the first fast mechanical switch K1 to open and the second fast mechanical switch K2 to close, ending the aperiodic trigger test of the test valve V1 of the controllable phase - commutation converter valve under test.

[0092] It can be understood that the preset voltage peak value is the maximum voltage value that the test valve V1 of the controllable phase - commutation converter valve under test can accept, that is, when exceeding the peak value, it may cause damage to the test valve V1 of the controllable phase - commutation converter valve under test.

[0093] It should be noted that when conducting the valve aperiodic trigger test, in order to verify the electromagnetic interference resistance performance between adjacent valves in the multi - valve unit, in addition to the test valve, an auxiliary valve (or its effective part) should also be included in this test. The valve electromagnetic compatibility test needs to be completed jointly with the valve aperiodic trigger test. The auxiliary valve is set as the test sample for the valve electromagnetic compatibility test in the aperiodic trigger test.

[0094] In some embodiments, arrange the geometric position of the auxiliary valve according to the layout of the controllable phase - commutation converter valve during operation. The auxiliary valve needs to be powered and charged for at least 30 s before the test and remain charged during the test. The auxiliary valve must be forward - biased at the moment when the test valve is triggered in the aperiodic trigger test.

[0095] Further, when the drive boards of the test valve V1 of the controllable phase - commutation converter valve under test and the auxiliary valve V2 of the controllable phase - commutation converter valve are charged, control the first fast mechanical switch K1 to close and control the second fast mechanical switch K2 to open, including:

[0096] When the drive boards of the test valve V1 of the controllable phase - commutation converter valve under test and the auxiliary valve V2 of the controllable phase - commutation converter valve are charged, control the first fast mechanical switch K1 to close, and after the first preset time, control the second fast mechanical switch K2 to open, so that the test valve V1 of the controllable phase - commutation converter valve under test enters the natural discharge state, the power frequency test transformer S continuously charges the auxiliary valve V2 of the controllable phase - commutation converter valve, and the impulse generating device does not participate in the work;

[0097] Among them, the first preset time is greater than the action time when the second fast mechanical switch K2 disconnects.

[0098] It should be noted that the embodiments of the present invention do not limit the "first preset time". In some embodiments, it can be set by those skilled in the art according to engineering needs or experimental data, etc.

[0099] Furthermore, controlling the impulse generating device to generate an impulse voltage applied to the test valve V1 of the controllable commutation valve to be measured includes:

[0100] Adjusting the wavefront resistor R2, the wave tail resistor R1, and the wave adjusting inductor L so that the impulse generating device generates an impulse voltage applied to the test valve V1 of the controllable commutation valve to be measured.

[0101] Furthermore, the second preset time is greater than the time required for the board voltages of all thyristors and IGBT components in the test valve V1 of the controllable commutation valve to be measured to drop to the second preset voltage range, and less than the power-off maintenance time of the boards in all thyristors and IGBT components in the test valve V1 of the controllable commutation valve to be measured;

[0102] The third preset time is greater than the turn-off time of the IGBT component in the main branch of the test valve V1 of the controllable commutation valve to be measured.

[0103] It should be noted that the embodiments of the present invention do not limit the "second preset time", "third preset time", "preset voltage peak value", "first preset voltage range", and "second preset voltage range". In some embodiments, it can be set by those skilled in the art according to engineering needs or experimental data, etc.

[0104] The present invention provides a non-periodic triggering test method for a controllable commutation valve. By controlling the turn-off or closure of the first fast mechanical switch K1 and the second fast mechanical switch K2, the input and output of the power frequency test transformer S and the impulse generating device are controlled, and the non-periodic triggering test of the test valve V1 of the controllable commutation valve to be measured is carried out. It not only realizes the simultaneous power supply of the IGBT components and thyristor boards in the test, but also realizes the electrical isolation between the power frequency test transformer S and the impulse generating device, ensuring the safe and reliable development of the impulse test for the controllable commutation valve.

[0105] To further illustrate the above non-periodic triggering test method for a controllable commutation valve, the present invention provides a specific example, such as Figure 3 shown, K1 is Figure 2 the switch state schematic diagram of the first fast mechanical switch K1 in Figure 2 and K2 is Figure 2Schematic diagram of the operating state of the medium-voltage impulse generator D. V11-V14 are respectively the schematic diagrams of the trigger signals of the thyristor / IGBT components of the four sub-valves V11-V14 in the test valve V1 of the controllable commutation converter valve to be tested. For K1 and K2, Figure 3 in which 0 represents the switch is off and 1 represents the switch is on; for VS, Figure 3 in which 0 represents that the impulse generator does not operate, and 1 represents that the impulse generator generates an impulse voltage; for V11-V14, Figure 3 in which 0 represents that the thyristor / IGBT device is not triggered, and 1 represents that the thyristor / IGBT device is triggered.

[0106] At the beginning stage of the test, that is, Figure 3 in stage ①, control the first fast mechanical switch K1 to be off and the second fast mechanical switch K2 to be on. At this time, the power frequency test transformer S charges the drive boards in the test valve V1 of the controllable commutation converter valve to be tested and the auxiliary valve V2 of the controllable commutation converter valve. The effective value of the voltage of the power frequency test transformer S should be able to satisfy the normal energy extraction of all thyristor / IGBT component boards in each sub-valve of the main and auxiliary branches.

[0107] After the boards in the test valve V1 of the controllable commutation converter valve to be tested and the auxiliary valve V2 of the controllable commutation converter valve are charged, enter Figure 3 stage ②. At this time, control the second fast mechanical switch K2 to turn off. The delay time Δt 1 after the turn-off command is issued should be greater than the operating time of the second fast mechanical switch K2 to ensure reliable disconnection of the switch. Then immediately control the first fast mechanical switch K1 to turn on. At this time, the impulse generator D and the test valve V1 of the controllable commutation converter valve to be tested form a loop. The power frequency test transformer S no longer charges the boards in the test valve V1 of the controllable commutation converter valve to be tested. The test valve V1 of the controllable commutation converter valve to be tested enters the natural discharge state. The delay time Δt 2 in the discharge stage should ensure that the voltages of all thyristor / IGBT component boards in each sub-valve of the main and auxiliary branches in the test valve V1 of the controllable commutation converter valve to be tested drop to the safe range (i.e., the second preset voltage range), ensure that the voltage will not be too high to cause component damage when the impulse voltage is superimposed later, and shall not be greater than the power-off maintenance time of the thyristor / IGBT component boards in the test valve V1 of the controllable commutation converter valve to be tested to prevent the FOP function from failing after the board loses power. During this stage, the power frequency test transformer S continuously charges the auxiliary valve V2 of the controllable commutation converter valve, and the impulse generator D does not participate in the work.

[0108] The next stage, that is, Figure 3In the third stage, control the first fast mechanical switch K1 and the second fast mechanical switch K2 to maintain their original switch states unchanged (i.e., maintain the states in the second stage), and adjust the wavefront resistor R2, the wave tail resistor R1, and the wave-adjusting inductor L in the impulse generating device D respectively to apply an impulse voltage to the test valve V1 of the controllable commutation valve to be tested. When the impulse voltage reaches the preset voltage peak, trigger the sub-valves V11 and V12 in the main branch of the test valve V1 of the controllable commutation valve to be tested. The energy on the second capacitor C2 will immediately convert to current for the test valve V1 of the controllable commutation valve to be tested, so as to verify whether the thyristor / IGBT components and their auxiliary circuits in the test valve V1 of the controllable commutation valve to be tested have sufficient current and voltage withstand capabilities when the test valve V1 of the controllable commutation valve to be tested is turned on under the specified high voltage conditions. Delay time Δt 3 is the time to trigger the test valve when the impulse voltage applied to the test valve V1 of the controllable commutation valve to be tested reaches the peak, delay time Δt 4 is the turn-off time of the IGBT component in the main branch of the test valve V1 of the controllable commutation valve to be tested, Δt 4 It is necessary to ensure that the impulse voltage has dropped to a relatively low level when the IGBT component in the main branch of the test valve V1 of the controllable commutation valve to be tested is turned off, to prevent damage to the component due to excessive voltage, Δt 3 and Δt 4 both need to be adjusted according to the actual situation.

[0109] The next stage, that is Figure 3 In the fourth stage, after confirming that the test equipment and the test valve V1 of the controllable commutation valve to be tested are in normal state (i.e., after applying the impulse voltage, the components in the test valve V1 of the controllable commutation valve to be tested are not damaged), this stage needs to adjust the test device to the initial state, that is, control the first fast mechanical switch K1 to be disconnected, control the second fast mechanical switch K2 to be closed, and the power frequency test transformer S provides a supplementary energy voltage for the test valve V1 of the controllable commutation valve to be tested and the auxiliary valve V2 of the controllable commutation valve to prepare for the subsequent test.

[0110] A non-periodic triggering test method for a controllable commutation valve provided by the present invention can achieve stable energy extraction of the board card under the condition of uneven voltage division of the thyristor sub-valve and the IGBT sub-valve in the test valve V1 of the controllable commutation valve to be tested, and ensure the normal functions such as FOP triggering and status reporting;

[0111] A non-periodic triggering test method for a controllable commutation valve provided by the present invention isolates the power frequency test transformer S from the impulse generating device D by using a fast mechanical switch, so that the test valve V1 will not be damaged due to the superimposed excessive voltage, and at the same time the power frequency test transformer S will not be affected by the impulse voltage, ensuring the safety of the test device and the test valve;

[0112] A non-periodic triggering test method for a controllable phase-shifting converter valve provided by the present invention isolates the auxiliary valve V2 of the controllable phase-shifting converter valve from the impulse generating device D by using a fast mechanical switch. While taking into account the electromagnetic interference resistance test of the test valve V1, the impulse overvoltage will not be applied to the auxiliary valve V2 to ensure that the auxiliary valve V2 is not damaged; and if the auxiliary valve V2 is interfered and conducts, the power frequency voltage will not be applied to the test valve V1 to ensure that the test valve V1 is not damaged.

[0113] When the test valve V1 of the controllable phase-shifting converter valve to be tested is triggered and conducts at the impulse peak value, the auxiliary valve V2 should be in a forward-biased state. The test circuit of the non-periodic triggering test method for a controllable phase-shifting converter valve provided by the present invention fully considers this requirement, has a large adjustment range for the impulse application moment, and the impulse peak moment only needs to correspond to the positive half-wave of the power frequency voltage at both ends of the power frequency test transformer S.

[0114] A non-periodic triggering test method for a controllable phase-shifting converter valve provided by the present invention can change the output voltages of the power frequency test transformer S and the impulse generating device D according to the test requirements, and can be applicable to the non-periodic triggering tests of controllable phase-shifting converter valves with different voltage and current levels.

[0115] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be seen in the same or similar content of other embodiments.

[0116] Embodiment III

[0117] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory. The memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of a non-periodic triggering test method for a controllable phase-shifting converter valve in the above embodiments.

[0118] Embodiment 4

[0119] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a computer device, used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and, of course, the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, and this storage space stores the operating system of the terminal. Moreover, in this storage space, one or more instructions suitable for being loaded and executed by the processor are also stored. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. One or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor to implement the steps of a non-periodic triggering test method for a controllable commutation valve in the above embodiments.

[0120] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0121] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0122] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and this instruction device implements the functions in the flowFigure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 the one block or multiple blocks.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A non-periodic triggering test device for a controllable phase-shifting converter valve, characterized in that, it includes: a power frequency test transformer, a controllable phase-shifting converter valve auxiliary valve, an impulse generating device, a first fast mechanical switch, and a second fast mechanical switch; the power frequency test transformer, the controllable phase-shifting converter valve auxiliary valve, the test valve of the controllable phase-shifting converter valve to be measured, and the impulse generating device are connected in parallel in sequence; one end of the first fast mechanical switch is connected to the anode of the test valve of the controllable phase-shifting converter valve to be measured, and the other end is connected to the impulse generating device; one end of the second fast mechanical switch is connected to the anode of the test valve of the controllable phase-shifting converter valve to be measured, and the other end is connected to the cathode of the controllable phase-shifting converter valve auxiliary valve; the first fast mechanical switch is used to control the input and withdrawal of the power frequency test transformer; the second fast mechanical switch is used to control the input and withdrawal of the impulse generating device; the impulse generating device is used to generate an impulse voltage applied to the test valve of the controllable phase-shifting converter valve to be measured; the power frequency test transformer is used to charge the drive board in the test valve of the controllable phase-shifting converter valve to be measured; the controllable phase-shifting converter valve auxiliary valve is used to assist the test valve of the controllable phase-shifting converter valve to be measured to complete the valve electromagnetic compatibility test.

2. The device according to claim 1, characterized in that, it further includes: a wave-shaping inductor, a current-limiting resistor, and a second capacitor; one end of the wave-shaping inductor is connected to the other end of the first fast mechanical switch, and the other end is connected to the impulse generating device; the connection point between one end of the wave-shaping inductor and the first fast mechanical switch is connected to one end of the current-limiting resistor, and the other end of the current-limiting resistor is connected to the second capacitor; the second capacitor is grounded.

3. The device according to claim 2, characterized in that, the impulse generating device includes: a wave-tail resistor, a wave-front resistor, a first capacitor, and an isolating sphere gap; one end of the wave-front resistor is connected to the isolating sphere gap, and the other end is connected to the other end of the wave-shaping inductor; the first capacitor and the wave-tail resistor are connected in parallel across the two ends of the isolating sphere gap, and the connection point between the first capacitor and the wave-tail resistor is connected to the second capacitor.

4. The device according to claim 1, characterized in that, the controllable phase-shifting converter valve auxiliary valve includes: a first saturable reactor, a first thyristor, and a first IGBT element connected in sequence, and a second saturable reactor, a second thyristor, and a second IGBT element connected in sequence; the first saturable reactor is connected to the second saturable reactor, and the end where the first saturable reactor and the second saturable reactor are connected to each other constitutes the cathode of the controllable phase-shifting converter valve auxiliary valve; the first IGBT element is connected to the second IGBT element, and the end where the first IGBT element and the second IGBT element are connected to each other constitutes the anode of the controllable phase-shifting converter valve auxiliary valve.

5. The device according to claim 1, characterized in that, The to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve includes: a main branch and an auxiliary branch connected in parallel; the main branch includes: a third saturable reactor, a third thyristor, and a third IGBT element connected in sequence; the auxiliary branch includes: a fourth saturable reactor, a fourth thyristor, and a fourth IGBT element connected in sequence; The third saturable reactor is connected to the fourth saturable reactor, and one end where the third saturable reactor and the fourth saturable reactor are interconnected constitutes the anode of the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve; The third IGBT element is connected to the fourth IGBT element, and one end where the third IGBT element and the fourth IGBT element are interconnected constitutes the cathode of the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve.

6. A method for aperiodic triggering test of a thyristor controlled phase shifter (TCPS) valve, which is applied to the aperiodic triggering test device of a thyristor controlled phase shifter (TCPS) valve according to any one of claims 1-5, characterized in that, the method includes: By controlling the opening or closing of the first fast mechanical switch and the second fast mechanical switch, the input and output of the power frequency test transformer and the impulse generator are controlled to perform the aperiodic triggering test on the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve.

7. According to the method described in claim 6, characterized in that, the controlling the opening or closing of the first fast mechanical switch and the second fast mechanical switch to control the input and output of the power frequency test transformer and the impulse generator to perform the aperiodic triggering test on the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve includes: Controlling the first fast mechanical switch to open and the second fast mechanical switch to close, so that the power frequency test transformer charges the drive boards in the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve and the thyristor controlled phase shifter (TCPS) valve auxiliary valve; When the charging of the drive boards in the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve and the thyristor controlled phase shifter (TCPS) valve auxiliary valve is completed, controlling the first fast mechanical switch to close and the second fast mechanical switch to open, so that the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve enters the natural discharge state; When the time for the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve to enter the natural discharge state reaches the second preset time, controlling the first fast mechanical switch to remain closed, the second fast mechanical switch to remain open, and controlling the impulse generator to generate an impulse voltage applied to the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve; When the impulse voltage reaches the preset voltage peak value, triggering the thyristor and IGBT element in the main branch of the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve, and the energy on the second capacitor is converted into current for the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve until the impulse voltage drops to the first preset voltage range, turning off the IGBT element in the main branch of the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve, and after the third preset time, controlling the first fast mechanical switch to open and the second fast mechanical switch to close to end the aperiodic triggering test of the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve.

8. According to the method described in claim 7, characterized in that, the when the charging of the drive boards in the to-be-tested thyristor controlled phase shifter (TCPS) valve sample valve and the thyristor controlled phase shifter (TCPS) valve auxiliary valve is completed, controlling the first fast mechanical switch to close and the second fast mechanical switch to open, includes: When the driving boards in the valve under test of the controllable phase - shifted converter valve and the auxiliary valve of the controllable phase - shifted converter valve are charged, control the first fast mechanical switch to close, and after a first preset time, control the second fast mechanical switch to open, so that the valve under test of the controllable phase - shifted converter valve enters the natural discharge state. The power - frequency test transformer continuously charges the auxiliary valve of the controllable phase - shifted converter valve, and the impulse generating device does not participate in the operation; Wherein, the first preset time is greater than the operation time for the second fast mechanical switch to open.

9. The method according to claim 7, characterized in that, the controlling the impulse generating device to generate an impulse voltage applied to the valve under test of the controllable phase - shifted converter valve includes: adjusting the wave - front resistance, wave - tail resistance and wave - adjusting inductor so that the impulse generating device generates an impulse voltage applied to the valve under test of the controllable phase - shifted converter valve.

10. The method according to claim 7, characterized in that, the second preset time is greater than the time required for the board voltages of all thyristors and IGBT components in the valve under test of the controllable phase - shifted converter valve to drop to the second preset voltage range, and less than the power - off holding time of the boards in all thyristors and IGBT components in the valve under test of the controllable phase - shifted converter valve; the third preset time is greater than the turn - off time of the IGBT components in the main branch of the valve under test of the controllable phase - shifted converter valve.

11. A computer device, characterized in that, comprising: one or more processors; the processor is used to store one or more programs; when the one or more programs are executed by the one or more processors, the aperiodic triggering test method of the controllable phase - shifted converter valve as described in any one of claims 6 to 10 is implemented.

12. A computer - readable storage medium, characterized in that, it stores a computer program, and when the computer program is executed, the aperiodic triggering test method of the controllable phase - shifted converter valve as described in any one of claims 6 to 10 is implemented.

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