CN110726916A - Automatic testing device and method for breakover voltage of protection thyristor of MMC power module - Google Patents
Automatic testing device and method for breakover voltage of protection thyristor of MMC power module Download PDFInfo
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Abstract
The invention discloses an automatic testing device and method for breakover voltage of a protection thyristor of an MMC power module. The automatic testing device for the breakover voltage of the protection thyristor of the MMC power module can respectively simulate the actual operating conditions of the protection thyristor in the half-bridge power module and the full-bridge power module out of control, realize the automatic and accurate regulation of the test voltage by automatically regulating the trigger angle of the rectifier bridge, and accurately and automatically test the breakover voltage of the thyristor, so that the thyristor suitable for the power module is more accurately screened, the loss of the power module damage caused by the breakdown of the IGBT element is reduced, the forced outage probability of the whole current converter is reduced, and the operation reliability of the system is improved.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an automatic testing device and method for breakover voltage of a protection thyristor of an MMC power module.
Background
With the rapid development of flexible dc transmission technology, Modular Multilevel Converters (MMC) have been applied to engineering. The converter in this form is composed of thousands of power modules (see topology fig. 1 and fig. 2), and if a certain power module loses control (an IGBT cannot trigger), the voltage of a capacitor rises, so that the IGBT in the power module is subjected to overvoltage breakdown to form an open circuit state, and finally the whole converter is forced to stop running. Although a bypass switch is added at the power module port, the bypass switch is closed to bypass the failed module when the module fails. However, the bypass switch may have the problem of operation rejection, and in order to solve the problem, a protection thyristor is added to the power module port. If the power module loses control, and under the condition that the bypass switch refuses to act, the voltage of the module capacitor rises and exceeds the breakover voltage of the thyristor, the protective thyristor is broken down and forms a passage, and the operation of the current converter is not influenced. Therefore, it is important to screen thyristors within the acceptable breakover voltage range. However, the current testing method for the breakover voltage of the protection thyristor is not consistent with the actual operation condition of the power module, so that the breakover voltage deviation of the protection thyristor sieve is large.
Disclosure of Invention
In order to solve the problem that the deflection voltage deviation of a protection thyristor sieve is large due to the fact that the current method for testing the deflection voltage of the protection thyristor is inconsistent with the actual operation condition of a power module, the embodiment of the invention provides an automatic testing device and method for the deflection voltage of the protection thyristor of an MMC power module
In order to achieve the purpose, the technical scheme of the invention is as follows:
in a first aspect, an embodiment of the present invention provides an automatic testing apparatus for a breakover voltage of a protection thyristor of an MMC power module, including:
a power source;
a transformer having a primary side connected to a power supply;
the input end of the rectifier bridge is connected with the secondary side of the transformer and used for outputting direct-current voltage;
the IGBT full-bridge inverter is connected with the output end of the rectifier bridge and outputs different voltage waveforms according to control commands, the IGBT full-bridge inverter comprises four switches Q1, Q2, Q3 and Q4, and the four switches Q1, Q2, Q3 and Q4 are sequentially connected in series in a clockwise mode to form a loop;
the electric heating clamp is provided with one power interface end connected between the Q1 switch and the Q4 switch, and the other power interface end connected between the Q2 switch and the Q3 switch; the electric heating clamp is used for carrying out heating test on the tested thyristor;
the voltmeter is used for measuring the real-time voltage of the tested thyristor;
the current meter is used for measuring the real-time current of the tested thyristor;
the rectifier bridge controller is connected with the input end of the rectifier bridge and used for controlling the trigger angle and the trigger pulse of the rectifier bridge;
the IGBT controller is connected with the IGBT full-bridge inverter and is used for controlling the switching combination and the time sequence of the Q1, the Q2, the Q3 and the Q4;
and the temperature controller is connected with the electric heating clamp and used for controlling the heating temperature of the electric heating clamp.
Further, the MMC power module protection thyristor breakover voltage automatic testing device still include: and the human-computer operation interface is respectively connected with the rectifier bridge controller, the IGBT controller and the temperature controller and is used for outputting operation instructions to the rectifier bridge controller, the IGBT controller and the temperature controller.
Furthermore, the human-computer operation interface is respectively connected with a voltmeter, an ammeter and an electric heating clamp and used for receiving real-time voltage, real-time current and real-time temperature signals of the tested thyristor.
Further, a capacitor is connected in parallel between the rectifier bridge and the IGBT full-bridge inverter.
Further, a reactor is connected in series between the rectifier bridge and the IGBT full-bridge inverter.
Further, the rectifier bridge controller is connected with the input end of the rectifier bridge through a phase-locked loop.
In a second aspect, an embodiment of the present invention provides a method for testing a breakover voltage of a half-bridge power module protective thyristor, where the method is performed by using the above apparatus for automatically testing a breakover voltage of a half-bridge power module protective thyristor, and includes:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing the tested thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q3 to be kept on and Q2 to be kept off;
and 5: the IGBT controller controls Q1 to be switched on and Q4 to be switched off, and the set time T1 is kept;
step 6: the IGBT controller controls Q1 to be switched off and Q4 to be switched on, and set time T2 is kept;
and 7: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller so as to slowly increase the output voltage of the rectifier bridge, repeating the steps 5 and 6, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 8: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and step 9: and (3) data analysis:
(3) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(4) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
Further, the set times T1 and T2 are both 10 ms.
In a third aspect, an embodiment of the present invention provides a method for testing a breakover voltage of a full-power module protection thyristor, where the method is performed by using the above apparatus for automatically testing a breakover voltage of a protection thyristor of an MMC power module, and includes:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing a protective thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q1 and Q3 to be simultaneously turned on, and Q2 and Q4 to be simultaneously turned off, and the set time T3 is kept;
and 5: the IGBT controller controls Q1 and Q3 to be turned off at the same time, and controls Q2 and Q4 to be turned on at the same time, and the set time T4 is kept;
step 6: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller so as to slowly increase the output voltage of the rectifier bridge, repeating the steps 4 and 5, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 7: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and 8: and (3) data analysis:
(1) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(2) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
Further, the set times T3 and T4 are both 10ms
Compared with the prior art, the invention has the beneficial effects that:
the automatic testing device for the breakover voltage of the protection thyristor of the MMC power module can respectively simulate the actual operating conditions of the protection thyristor in the half-bridge power module and the full-bridge power module out of control, realize the automatic and accurate regulation of the test voltage by automatically regulating the trigger angle of the rectifier bridge, and accurately and automatically test the breakover voltage of the thyristor, so that the thyristor suitable for the power module is more accurately screened, the loss of the power module damage caused by the breakdown of the IGBT element is reduced, the forced outage probability of the whole current converter is reduced, and the operation reliability of the system is improved.
Drawings
FIG. 1 is a half-bridge power module topology;
FIG. 2 is a full bridge power module topology;
fig. 3 is a test schematic diagram of an automatic testing apparatus for breakover voltage of a protection thyristor of an MMC power module according to embodiment 1 of the present invention;
FIG. 4 is a timing diagram of the voltage of the half-bridge power module protection thyristor;
FIG. 5 is a timing diagram of the voltage of the protection thyristor of the full bridge power module;
in the figure: 1. electrically heating the fixture; 2. a voltmeter; 3. an ammeter; 4. a bridge rectifier controller; 5. an IGBT controller; 6. a temperature controller; 7. a human-machine operation interface; 8. a phase locked loop.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example 1:
referring to fig. 1, a test schematic diagram of an automatic testing device for breakover voltage of a protection thyristor of an MMC power module provided in this embodiment is shown, where the device mainly includes a power supply, a transformer T, a rectifier bridge, an IGBT full-bridge inverter, an electric heating fixture 1, a voltmeter 2, an ammeter 3, a rectifier bridge controller 4, an IGBT controller 5, and a temperature controller 6.
The power supply adopts U, V, W three-phase power supply in the embodiment, the transformer T adopts a variable step-up transformer, the primary side of the transformer T is connected with the power supply, and the secondary side of the transformer T is connected with the input end of a rectifier bridge, specifically, the rectifier bridge is composed of six diodes T1-T6 and is used for outputting direct-current voltage to the IGBT full-bridge inverter; the IGBT full-bridge inverter outputs different voltage waveforms according to the control command so as to simulate actual operation conditions of protective thyristors in an uncontrolled half-bridge power module and a full-bridge power module, as shown in FIGS. 4 and 5; specifically, the IGBT full-bridge inverter comprises four switches Q1, Q2, Q3 and Q4, wherein the four switches Q1, Q2, Q3 and Q4 are sequentially connected in series in a clockwise mode to form a loop; the electric heating clamp is provided with one power interface end connected between the Q1 switch and the Q4 switch, and the other power interface end connected between the Q2 switch and the Q4 switch; the electric heating clamp 1 is used for heating and testing the tested thyristor, and when the electric heating clamp is used specifically, the tested thyristor is placed in the electric heating clamp 1 so as to simulate the temperature of radiators at two ends of the thyristor when a power module works.
The voltmeter 2 is connected in parallel with two ends of the electric heating clamp 1 and is used for measuring the real-time voltage of the tested thyristor; the ammeter 3 measures the real-time current of the tested thyristor; the rectifier bridge controller 4 is connected with the input end of the rectifier bridge and is used for controlling the trigger angle and the trigger pulse of the rectifier bridge; the IGBT controller 5 is connected with the IGBT full-bridge inverter and is used for controlling the switching combination and the time sequence of Q1, Q2, Q3 and Q4, so that the actual operation working conditions of the protective thyristors in the uncontrolled half-bridge power module and the full-bridge power module are automatically and accurately simulated; the temperature controller 6 is connected with the electric heating fixture 1 for controlling the heating temperature of the electric heating fixture.
Therefore, the automatic testing device for the breakover voltage of the protection thyristor of the MMC power module provided by the embodiment can respectively simulate the actual operation working conditions of the protection thyristor in an out-of-control half-bridge power module and a full-bridge power module, the automatic and accurate regulation of the test voltage is realized by automatically regulating the trigger angle of the rectifier bridge, the breakover voltage of the thyristor can be accurately and automatically tested, the thyristor which is suitable for the power module is more accurately screened, the loss of the power module damage caused by the breakdown of the IGBT element is reduced, the forced shutdown probability of the whole converter is reduced, and the reliability of the system operation is improved.
As a preferable choice of the automatic testing device for the breakover voltage of the protection thyristor of the MMC power module, the testing device further includes a human-machine interface 7, and the human-machine interface 7 Is respectively connected with the rectifier bridge controller 4, the IGBT controller 5, and the temperature controller 6, and Is used for outputting an operation instruction to the rectifier bridge controller 4, the IGBT controller 5, and the temperature controller 6, so as to control the operation, for example, the maximum test voltage Vs, the leakage current Is, and the test temperature Ts of the tested thyristor Th can be input. Further, the human-machine interface 7 is connected to the voltmeter 2, the ammeter 3, and the electric heating fixture 1, respectively, for receiving real-time voltage, real-time current, and real-time temperature signals of the tested thyristor, so as to obtain relevant measurement information in real time.
As another preferable mode of the device for automatically testing the breakover voltage of the protection thyristor of the MMC power module, a capacitor C is connected in parallel between the rectifier bridge and the IGBT full-bridge inverter to perform a voltage stabilizing function. And a reactor L is connected between the rectifier bridge and the IGBT full-bridge inverter in series to play the roles of smoothing current and limiting the current change rate. Meanwhile, the rectifier bridge controller is connected with the input end of the rectifier bridge through a phase-locked loop 8, and the voltage angle of the side of the rectifier bridge can be measured through the phase-locked loop.
Example 2:
the embodiment provides a method for testing a breakover voltage of a half-bridge power module protective thyristor, which is performed by using the automatic testing device for the breakover voltage of the protective thyristor of the MMC power module described in embodiment 1, and comprises the following steps:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing the tested thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q3 to be kept on and Q2 to be kept off;
and 5: the IGBT controller controls Q1 to be switched on and Q4 to be switched off, and the set time T1 is kept;
step 6: the IGBT controller controls Q1 to be switched off and Q4 to be switched on, and set time T2 is kept;
and 7: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller so as to slowly increase the output voltage of the rectifier bridge, repeating the steps 5 and 6, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 8: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and step 9: and (3) data analysis:
(5) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(6) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
Specifically, the set times T1 and T2 are both 10ms, so as to more accurately simulate the actual operating conditions of the protection thyristors in the runaway half-bridge power module and the runaway full-bridge power module.
Example 3:
the embodiment provides a method for testing breakover voltage of a full-bridge power module protection thyristor, which is performed by using the automatic testing device for breakover voltage of the MMC power module protection thyristor described in embodiment 1, and comprises the following steps:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing a protective thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q1 and Q3 to be simultaneously turned on, and Q2 and Q4 to be simultaneously turned off, and the set time T3 is kept;
and 5: the IGBT controller controls Q1 and Q3 to be turned off at the same time, and controls Q2 and Q4 to be turned on at the same time, and the set time T4 is kept;
step 6: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller so as to slowly increase the output voltage of the rectifier bridge, repeating the steps 4 and 5, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 7: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and 8: and (3) data analysis:
(1) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(2) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
Specifically, the set times T1 and T2 are both 10ms, so as to more accurately simulate the actual operating conditions of the protection thyristors in the runaway half-bridge power module and the runaway full-bridge power module.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. The utility model provides a MMC power module protection thyristor breakover voltage automatic testing arrangement which characterized in that includes:
a power source;
a transformer having a primary side connected to a power supply;
the input end of the rectifier bridge is connected with the secondary side of the transformer and used for outputting direct-current voltage;
the IGBT full-bridge inverter is connected with the output end of the rectifier bridge and outputs different voltage waveforms according to control commands, the IGBT full-bridge inverter comprises four switches Q1, Q2, Q3 and Q4, and the four switches Q1, Q2, Q3 and Q4 are sequentially connected in series in a clockwise mode to form a loop;
the electric heating clamp is provided with one power interface end connected between the Q1 switch and the Q4 switch, and the other power interface end connected between the Q2 switch and the Q3 switch; the electric heating clamp is used for carrying out heating test on the tested thyristor;
the voltmeter is used for measuring the real-time voltage of the tested thyristor;
the current meter is used for measuring the real-time current of the tested thyristor;
the rectifier bridge controller is connected with the input end of the rectifier bridge and used for controlling the trigger angle and the trigger pulse of the rectifier bridge;
the IGBT controller is connected with the IGBT full-bridge inverter and is used for controlling the switching combination and the time sequence of the Q1, the Q2, the Q3 and the Q4;
and the temperature controller is connected with the electric heating clamp and used for controlling the heating temperature of the electric heating clamp.
2. The MMC power module protection thyristor breakover voltage automatic test device of claim 1, further comprising: and the human-computer operation interface is respectively connected with the rectifier bridge controller, the IGBT controller and the temperature controller and is used for outputting operation instructions to the rectifier bridge controller, the IGBT controller and the temperature controller.
3. The MMC power module protective thyristor breakover voltage automatic testing device of claim 2, wherein the human-machine interface is further connected with a voltmeter, an ammeter and an electric heating clamp respectively, for receiving the real-time voltage, real-time current and real-time temperature signal of the tested thyristor.
4. The MMC power module protective thyristor breakover voltage automatic test device of claim 1, wherein a capacitor is connected in parallel between the rectifier bridge and the IGBT full bridge inverter.
5. The MMC power module protective thyristor breakover voltage automatic testing device of claim 1, characterized in that a reactor is connected in series between the rectifier bridge and the IGBT full bridge inverter.
6. The MMC power module protection thyristor breakover voltage automatic testing device of claim 1, wherein the rectifier bridge controller is connected to an input of the rectifier bridge through a phase-locked loop.
7. A method for testing the breakover voltage of a half-bridge power module protection thyristor, which is performed by using the automatic testing device for the breakover voltage of the MMC power module protection thyristor according to any one of claims 3-6, wherein the method comprises the following steps:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing the tested thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q3 to be kept on and Q2 to be kept off;
and 5: the IGBT controller controls Q1 to be switched on and Q4 to be switched off, and the set time T1 is kept;
step 6: the IGBT controller controls Q1 to be switched off and Q4 to be switched on, and set time T2 is kept;
and 7: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller, slowly increasing the output voltage of the rectifier bridge, repeating the steps 5 and 6, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 8: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and step 9: and (3) data analysis:
(1) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(2) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
8. The method for testing a breakover voltage of a half-bridge power module thyristor according to claim 7, wherein the set times T1 and T2 are both 10 ms.
9. A full power module protection thyristor breakover voltage test method, which is carried out by adopting the MMC power module protection thyristor breakover voltage automatic test device of any claim 3-6, and is characterized by comprising the following steps:
step 1: setting a maximum test voltage Vs, a leakage current Is and a test temperature Ts of the tested thyristor Th on a human-computer interface;
step 2: installing a protective thyristor T into a heating clamp, and heating to a test temperature Ts;
and step 3: adjusting the trigger angle of a thyristor of the rectifier bridge to 90 degrees, so that the output voltage of the rectifier bridge is 0;
and 4, step 4: the IGBT controller controls Q1 and Q3 to be simultaneously turned on, and Q2 and Q4 to be simultaneously turned off, and the set time T3 is kept;
and 5: the IGBT controller controls Q1 and Q3 to be turned off at the same time, and controls Q2 and Q4 to be turned on at the same time, and the set time T4 is kept;
step 6: gradually reducing the trigger angle of the rectifier bridge thyristor by the rectifier bridge controller, slowly increasing the output voltage of the rectifier bridge, repeating the steps 4 and 5, measuring the voltage V of the tested thyristor by the voltmeter and comparing the voltage V with the maximum test voltage Vs, and comparing the current value I displayed by the ammeter with the leakage current set value Is;
and 7: stopping boosting when the following arbitrary conditions are met, and recording the voltage V and the current I of the tested thyristor at the moment:
(1) the voltage V of the tested thyristor is greater than or equal to the maximum test voltage Vs;
(2) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is;
and 8: and (3) data analysis:
(1) the current value I of the tested thyristor Is greater than or equal to the leakage current set value Is, and if the voltage V of the tested thyristor Is not within the range of the voltage requirement Vs +/- △ V of the thyristor, the tested thyristor does not meet the requirement;
(2) and if the current I of the tested thyristor Is not within the thyristor leakage current requirement Is +/- △ I, the tested thyristor does not meet the requirement.
10. The method for testing the breakover voltage of the full-bridge power module protection thyristor according to claim 9, wherein the set times T3 and T4 are both 10 ms.
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| PCT/CN2020/116038 WO2021052446A1 (en) | 2019-09-19 | 2020-09-18 | Apparatus and method for automatically testing transition voltage of protection thyristor of mmc power module |
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| CN112014664A (en) * | 2020-08-03 | 2020-12-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Comprehensive saturable reactor current test device and test method |
| CN112098796A (en) * | 2020-08-14 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司 | Flexible direct current converter valve half-bridge submodule thyristor breakdown testing device and method |
| WO2021052446A1 (en) * | 2019-09-19 | 2021-03-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Apparatus and method for automatically testing transition voltage of protection thyristor of mmc power module |
| CN113092979A (en) * | 2021-04-16 | 2021-07-09 | 全球能源互联网研究院有限公司 | MMC working condition power semiconductor device test circuit and control method |
| CN113721085A (en) * | 2020-05-26 | 2021-11-30 | 南京南瑞继保电气有限公司 | Submodule testing device and method |
| CN115754657A (en) * | 2022-11-24 | 2023-03-07 | 国网江苏省电力有限公司苏州供电分公司 | Serial power module test system and test method |
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| WO2021052446A1 (en) * | 2019-09-19 | 2021-03-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Apparatus and method for automatically testing transition voltage of protection thyristor of mmc power module |
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| CN112014664B (en) * | 2020-08-03 | 2022-01-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Comprehensive saturable reactor current test device and test method |
| CN112098796A (en) * | 2020-08-14 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司 | Flexible direct current converter valve half-bridge submodule thyristor breakdown testing device and method |
| CN113092979A (en) * | 2021-04-16 | 2021-07-09 | 全球能源互联网研究院有限公司 | MMC working condition power semiconductor device test circuit and control method |
| CN115754657A (en) * | 2022-11-24 | 2023-03-07 | 国网江苏省电力有限公司苏州供电分公司 | Serial power module test system and test method |
Also Published As
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| WO2021052446A1 (en) | 2021-03-25 |
| CN110726916B (en) | 2020-11-20 |
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