CN110850197B - MMC power module overvoltage thyristor bypass test method - Google Patents
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Abstract
The invention discloses an MMC power module overvoltage thyristor bypass test method, which adopts two-stage test to verify whether overvoltage protection of a half-bridge power module and a full-bridge power module of an outlet end parallel thyristor can act correctly, whether a body power module fails without influencing an adjacent power module or not can be ensured, and whether a system can continue to operate stably after the bypass thyristor is broken down or not can be ensured. The first stage test mainly verifies whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the waterway is not affected, and the normal operation of adjacent power modules is not affected. The second stage test mainly verifies the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, and verifies that a reliable passage is formed after the thyristor is broken down, the IGBT is not broken down, the capacitor is not subjected to through discharge, and the adjacent sub-modules are not influenced.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an overvoltage thyristor bypass test method for an MMC power module.
Background
With the development of high-power flexible direct-current transmission technology, Modular Multilevel Converters (MMC) are increasingly applied to engineering, and have the advantages of low switching frequency, low loss and the like. Every bridge arm of this kind of form transverter is established ties by hundreds of power module, and every power module can adopt full-bridge structure or half-bridge structure, and when breaking down owing to getting can power or control integrated circuit board, when power module becomes uncontrollable state, the electric capacity in the operation can be by continuous charging, and electric capacity continuous charging current will lead to capacitance voltage to surpass its tolerance scope, and insulation breakdown can take place for final condenser, and inside vaporization causes the condenser inflation, probably explodes even, forms huge harm to equipment on every side. In order to avoid the situation, a technical route that a thyristor with a short-circuited gate pole and a short-circuited cathode is connected in parallel with the input end of the power module and used as a backup power module reliable bypass device is adopted in engineering, but a test method for power module overvoltage thyristor bypass is not disclosed.
Disclosure of Invention
In order to solve the problem that an effective test method is not available for testing the correctness and the reliability of the overvoltage thyristor bypass of the MMC power module, the embodiment of the invention provides a test method of the overvoltage thyristor bypass of the MMC power module.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an MMC power module overvoltage thyristor bypass test method is used for carrying out overvoltage bypass test on a half-bridge power module and a full-bridge power module of which the thyristors are connected in parallel at the outlet end, and comprises the following steps:
the first stage test is used for verifying whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the influence on a water path is avoided, and the normal operation of adjacent power modules is not influenced;
and the second stage test is used for verifying the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, verifying that a reliable passage is formed after the thyristor is broken down, preventing the IGBT from being broken down, preventing the capacitor from generating direct discharge and not influencing adjacent submodules.
Further, the first phase test is performed using a first test loop, the first test loop comprising:
the output end of the charger is used for charging test of the MMC power module;
the voltmeter V1 is connected in parallel at two ends of the output end of the charger and is used for measuring the voltage at the two ends of the output end;
the switch K1 and the resistor R1 are sequentially connected in series in a circuit at the output end of the charger;
the switch K2 and the resistor R2 are connected in series to form a branch circuit and are connected to two ends of the voltmeter V1.
Further, the first phase experiment comprises:
closing K1 and opening K2, controlling a charger to charge a capacitor of the MMC power module, enabling a bypass thyristor to break down, and monitoring the voltage at two ends of V1;
after the test is finished, K1 is switched off, K2 is switched on, and the capacitor of the MMC power module is discharged;
grounding a capacitor and a charging circuit of the MMC power module, and confirming completion of discharging by adopting a high-voltage attenuation probe;
checking whether broken metal chips splash in a discharge circuit after the thyristor breakdown, whether the deformation of the sub-module shell influences adjacent modules, whether the thyristor and a water path have obvious influences and the like;
measuring an output equivalent resistance value of the MMC power module;
if no obvious abnormity exists, the MMC power module is assembled into a valve assembly, and a rated current through-flow test is carried out on the MMC power module for a plurality of hours.
Further, the second stage is performed by using an operation test platform, and the operation test platform comprises:
the input end of the pre-charging power supply is connected with a power supply through a switch CB01, the output end of the pre-charging power supply is used for connecting the MMC power module to be tested, and a switch QS01 is connected in series on a circuit of the output end;
and the input end of the energy supplementing power supply is connected with the power supply through a switch CB02, and the output end of the energy supplementing power supply is used for supplementing energy and charging the operation test platform.
Further, the second stage test comprises:
the method comprises the steps of closing CB01 and QS01, charging an operation test platform, disconnecting QS01 and CB01 after charging is completed, closing CB02 to supplement energy to the operation test platform, starting the test platform to unlock and operate to a rated working condition, pulling out a tested MMC power module to trigger an optical fiber to manufacture a driving fault, continuously pressurizing a tested power module capacitor by a valve section operation current, forming voltage at an output port of the MMC power module, and enabling the power module to be in a reliable short circuit state until a bypass thyristor is broken down;
recording the voltage between the ends of the valve section, the port voltage of the test sample module, the capacitance voltage of the test sample module and the current waveform of the bridge arm at the moment of overvoltage and short circuit of the MMC power module;
after the test is finished, carrying out a through-flow test for 72 hours on the MMC power module of the test product;
and measuring the equivalent resistance value of the output port of the test sample module when the through-flow test is completed.
Further, the test process of performing a 72-hour through-flow test on the test MMC power module after the test is completed is as follows:
during the first 24 hours, the operation is carried out according to rated current; performing power cycle test between 0.1p.u. -1.0p.u. within the second 24-hour time, wherein the cycle time is not less than 5 times; and in the third 24-hour period, the operation is carried out according to the rated current.
Further, the test method passes the conditions of:
in the test process, the test sample power module does not have the phenomena of explosion, solid splashing and water pipe breakage destructiveness, and the normal operation of the peripheral power module is not influenced;
the tested product power module is in a reliable short circuit state after the test, and the equivalent impedance value of the output port of the tested product power module after the test at the first stage is not more than 0.6m omega;
the breakdown voltage of the bypass thyristor of the test sample module is not higher than the rated voltage of the IGBT;
in the second stage test, the IGBT is not broken down, and the capacitor is not subjected to through discharge.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, two-stage tests are adopted to verify whether overvoltage protection of the half-bridge power module and the full-bridge power module of which the outlet ends are connected with the thyristors in parallel can act correctly, whether the body power module can be ensured to be out of order without influencing adjacent power modules, and whether a system can continue to operate stably after the bypass thyristors are broken down. The first stage test mainly verifies whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the waterway is not affected, and the normal operation of adjacent power modules is not affected. The second stage test mainly verifies the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, and verifies that a reliable passage is formed after the thyristor is broken down, the IGBT is not broken down, the capacitor is not subjected to through discharge, and the adjacent sub-modules are not influenced. Finally, the accuracy and reliability of overvoltage protection design of a half-bridge power module and a full-bridge power module of which the output ends are connected with thyristors in parallel are verified.
Drawings
Fig. 1 is a flowchart of an overvoltage thyristor bypass test method for a flexible direct-current transmission MMC power module according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a first stage test of the overvoltage thyristor bypass of the power module;
FIG. 3 is a schematic circuit diagram of a second stage test principle of the overvoltage thyristor bypass of the power module;
fig. 4-5 are alternative schematic diagrams of damaged components of a half-bridge power module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
the embodiment provides an overvoltage thyristor bypass test method for a flexible direct-current transmission MMC power module, which can perform overvoltage bypass tests on a half-bridge power module and a full-bridge power module of which the output ends are connected with thyristors in parallel, and comprises two stages:
101. the first stage test mainly verifies whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the waterway is not affected, and the normal operation of adjacent power modules is not affected.
102. The second stage test mainly verifies the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, and verifies that a reliable passage is formed after the thyristor is broken down, the IGBT is not broken down, the capacitor is not subjected to through discharge, and the adjacent sub-modules are not influenced.
Therefore, the method verifies whether overvoltage protection of the half-bridge power module and the full-bridge power module of which the outlet ends are connected with the thyristors in parallel can act correctly or not by adopting two-stage tests, whether the body power module fails to influence adjacent power modules or not can be ensured, and whether a system can continue to operate stably after the bypass thyristors are broken down or not can be ensured. The first stage test mainly verifies whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the waterway is not affected, and the normal operation of adjacent power modules is not affected. The second stage test mainly verifies the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, and verifies that a reliable passage is formed after the thyristor is broken down, the IGBT is not broken down, the capacitor is not subjected to through discharge, and the adjacent sub-modules are not influenced. Finally, the accuracy and reliability of overvoltage protection design of a half-bridge power module and a full-bridge power module of which the output ends are connected with thyristors in parallel are verified.
Specifically, the first stage test mainly verifies whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor. The test schematic diagram is shown in fig. 1, and specifically includes an ac power supply, an output terminal of which is connected to a charger, and an output terminal of the charger is used for charging the MMC power module; the voltmeter V1 is connected in parallel at two ends of the output end of the charger and is used for measuring the voltage at the two ends of the output end; the switch K1 and the resistor R1 are sequentially connected in series in a circuit at the output end of the charger; the switch K2 and the resistor R2 are connected in series to form a branch circuit and are connected to two ends of the voltmeter V1. The following preparations were made before the first phase of the experiment was performed:
1. the test power module is assembled to the middle position of the valve assembly and connected with the test loop according to the test topology shown in fig. 1.
2. A bypass switch closing circuit of the test sample power module is disconnected and set to be in a 'failure state', and secondary systems of an energy taking power supply, a control board card and the like of the module are electrified to monitor the voltage state of the power module.
3. The T1 tube of the half-bridge power module is replaced by other damaged IGBTs of the same type, and the T2 tube is replaced by an insulating piece; the T1 and T4 tubes of the full-bridge power module are replaced by damaged IGBTs of the same type, the T2 and T3 tubes are replaced by insulators, and a direct-current stabilized power supply is charged from an alternating-current port of the power module, as shown in figures 4-5.
4. And (5) starting the water cooling system to operate, wherein the flow rate and the conductivity of the cooling water meet the requirements of rated working conditions.
The test steps are as follows:
1. closing K1 and disconnecting K2, controlling a charger to charge the capacitor, enabling a bypass thyristor to break down, and monitoring the voltage at two ends of V1;
2. after the test is finished, K1 is switched off, K2 is switched on, and the capacitor is discharged;
3. grounding the test article capacitor and the charging circuit, and confirming the completion of discharging by adopting a high-voltage attenuation probe;
4. checking whether broken metal chips splash in a discharge circuit after the thyristor breakdown, whether the deformation of the sub-module shell influences adjacent modules, whether the thyristor and a water path have obvious influences and the like;
5. measuring the output equivalent resistance value of the power module;
6. if there is no significant anomaly, then the power module is assembled into a valve assembly and subjected to a 2 hour rated current through-flow test.
Therefore, by adopting the test circuit and the test method, whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor can be effectively and accurately verified, solid splashing does not occur after the thyristor is broken down, the waterway is not affected, and the normal operation of the adjacent power module is not affected.
The second stage test mainly verifies the matching relation between the breakdown voltage of the thyristor and the voltage of the power module. At this stage, the IGBT configuration in the power module is complete and sound. The test schematic diagram is shown in fig. 2, and includes a pre-charge power supply, an input end of the pre-charge power supply is connected with a power supply through a switch CB01, an output end of the pre-charge power supply is used for connecting to a tested MMC power module, and a switch QS01 is connected in series on a line of the output end; and the input end of the energy supplementing power supply is connected with the power supply through a switch CB02, and the output end of the energy supplementing power supply is used for supplementing energy and charging the operation test platform. The following preparations were made before the second stage of the test was performed:
1. and the test sample power module is assembled to the middle position of the valve section, and the valve section is arranged on the valve section operation test platform and is connected with the electric loop according to the test topology.
2. And (5) starting the water cooling system to operate, wherein the flow rate and the conductivity of cooling water meet the requirements of valve section operation test parameters.
The test steps are as follows:
1. the method comprises the steps of closing CB01 and QS01, charging an operation test platform, disconnecting QS01 and CB01 after charging is completed, closing CB02 to supplement energy for the operation test platform, starting the test platform to unlock and operate to a rated working condition, pulling out a tested power module to trigger an optical fiber to manufacture a driving fault, continuously pressurizing a capacitor of the tested power module by using a valve section operation current, and forming voltage at an output port of the power module until the power module is in a reliable short circuit state after a bypass thyristor breaks down.
2. And recording waveforms such as the voltage between the ends of the valve section, the port voltage of the test sample module, the capacitance voltage of the test sample module, the bridge arm current and the like at the moment of overvoltage and short circuit of the power module.
3. And (3) carrying out a 72-hour through-flow test on the test product module after the test is finished, wherein the test process is as follows: during the first 24 hours, the operation is carried out according to rated current; performing power cycle test between 0.1p.u. -1.0p.u. within the second 24-hour time, wherein the cycle time is not less than 5 times; and in the third 24-hour period, the operation is carried out according to the rated current.
4. And measuring the equivalent resistance value of the output port of the test sample module when the through-flow test is completed.
Therefore, through the operation test platform and the test operation steps, the matching relation between the breakdown voltage of the thyristor and other protection voltages of the power module can be effectively and accurately verified, a reliable passage is formed after the thyristor is broken down, the IGBT is not broken down, direct discharge of the capacitor is not generated, and influence on adjacent submodules is avoided. Finally, the accuracy and reliability of overvoltage protection design of a half-bridge power module and a full-bridge power module of which the output ends are connected with thyristors in parallel are verified.
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 (3)
1. The MMC power module overvoltage thyristor bypass test method is characterized in that the test method is used for carrying out overvoltage bypass test on a half-bridge power module and a full-bridge power module of an outlet end parallel thyristor and comprises the following steps:
the first stage test is used for verifying whether the structural design of the power module and the adopted protective measures are safe and effective after the direct-current capacitor is broken down through the short circuit of the thyristor, and solid splashing does not occur after the thyristor is broken down, so that the influence on a water path is avoided, and the normal operation of adjacent power modules is not influenced;
the second stage test is used for verifying the matching relation between the breakdown voltage of the thyristor and the voltage of the power module, and verifying that a reliable path is formed after the thyristor is broken down, the IGBT is not broken down, the capacitor is not subjected to through discharge, and the adjacent sub-modules are not influenced;
the first stage test is performed using a first test loop comprising:
the output end of the alternating current power supply is connected with a charger, and the output end of the charger is used for a charging test of the MMC power module;
the voltmeter V1 is connected in parallel at two ends of the output end of the charger and is used for measuring the voltage at the two ends of the output end;
the switch K1 and the resistor R1 are sequentially connected in series in a circuit at the output end of the charger;
the switch K2 and the resistor R2 are connected in series to form a branch circuit and are connected to two ends of the voltmeter V1 in parallel;
the first phase of the test comprises:
closing a switch K1 and opening a switch K2, controlling a charger to charge a capacitor of the MMC power module, enabling a bypass thyristor to be broken down, and monitoring the voltage at two ends of a voltmeter V1;
after the test is finished, the switch K1 is opened, the switch K2 is closed, and the capacitor of the MMC power module is discharged;
grounding a capacitor and a charging circuit of the MMC power module, and confirming completion of discharging by adopting a high-voltage attenuation probe;
checking whether broken metal chips splash in a discharge circuit after the thyristor is broken down, whether the deformation of the sub-module shell influences adjacent modules, and whether the thyristor and a water path have obvious influences;
measuring an output equivalent resistance value of the MMC power module;
if no obvious abnormality exists, then assembling the MMC power module into a valve assembly, and carrying out rated current through-flow test on the MMC power module for several hours;
the second stage is carried out by adopting an operation test platform, and the operation test platform comprises:
the input end of the pre-charging power supply is connected with the power supply through a switch CB01, the output end of the pre-charging power supply is used for charging the MMC power module, and a switch QS01 is connected in series on a circuit of the output end;
the input end of the energy supplementing power supply is connected with the power supply through a switch CB02, and the output end of the energy supplementing power supply is used for supplementing energy and charging the operation test platform;
the second stage test comprises:
closing switches CB01 and QS01, charging the operation test platform, disconnecting the switches QS01 and CB01 after the charging is completed, closing the switch CB02 to supplement energy for the operation test platform, starting the test platform to unlock and operate to a rated working condition, pulling out the MMC power module to trigger the optical fiber to manufacture a driving fault, continuously pressurizing the capacitor of the tested power module by the valve section operation current, forming voltage at the output port of the MMC power module, and enabling the power module to be in a reliable short circuit state until the bypass thyristor is broken down;
recording the voltage between the ends of the valve section, the port voltage, the capacitance voltage and the bridge arm current waveform at the moment of overvoltage short circuit of the MMC power module;
after the test is finished, carrying out a 72-hour through-flow test on the MMC power module;
and measuring the equivalent resistance value of the output port of the MMC power module when the through-current test is completed.
2. The MMC power module overvoltage thyristor bypass test method of claim 1, wherein a test procedure of a 72-hour through-flow test on the MMC power module after the test is completed is as follows:
during the first 24 hours, the operation is carried out according to rated current; performing power cycle test between 0.1p.u. -1.0p.u. within the second 24-hour time, wherein the cycle time is not less than 5 times; and in the third 24-hour period, the operation is carried out according to the rated current.
3. The MMC power module overvoltage thyristor bypass test method of claim 1, wherein the conditions that the test method passes are:
in the test process, the MMC power module does not have the phenomena of explosion, solid splashing and water pipe breakage destructiveness, and does not influence the normal operation of the peripheral power module;
after the test, the MMC power module presents a reliable short circuit state, and the equivalent impedance value of the output port of the MMC power module after the first-stage test is not more than 0.6m omega;
the breakdown voltage of the bypass thyristor of the MMC power module is not higher than the rated voltage of the IGBT;
in the second stage test, the IGBT is not broken down, and the capacitor is not subjected to through discharge.
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| CN113866610B (en) * | 2021-10-22 | 2022-07-01 | 广东电网有限责任公司广州供电局 | Direct connection protection detection method and related device of full-bridge power module |
| CN114167167B (en) * | 2021-11-15 | 2024-02-09 | 许继集团有限公司 | Short-circuit current test device and test method for modularized multi-level converter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522882A (en) * | 2011-11-28 | 2012-06-27 | 中国电力科学研究院 | Protection circuit of converter power component |
| CN103904913A (en) * | 2014-04-14 | 2014-07-02 | 荣信电力电子股份有限公司 | Multi-level flexible VSC-HVDC power module protection and bypass strategy |
| CN103954893A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Thyristor shunt detection circuit and method used for voltage source converter |
| CN203894367U (en) * | 2014-05-09 | 2014-10-22 | 国家电网公司 | Thyristor shunting detection circuit for voltage source transverter |
| CN203967989U (en) * | 2014-04-14 | 2014-11-26 | 荣信电力电子股份有限公司 | The protection of many level flexible high pressure direct current transportation power model and bypass topology |
| CN104991131A (en) * | 2015-06-12 | 2015-10-21 | 中国科学院电工研究所 | Flexible direct-current power-transmission converter-valve half-bridge structure power module test device |
| CN110138191A (en) * | 2018-02-02 | 2019-08-16 | 荣信汇科电气技术有限责任公司 | The error protection and shunting device of modular multi-level converter power module |
-
2019
- 2019-10-22 CN CN201911003783.8A patent/CN110850197B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522882A (en) * | 2011-11-28 | 2012-06-27 | 中国电力科学研究院 | Protection circuit of converter power component |
| CN103904913A (en) * | 2014-04-14 | 2014-07-02 | 荣信电力电子股份有限公司 | Multi-level flexible VSC-HVDC power module protection and bypass strategy |
| CN203967989U (en) * | 2014-04-14 | 2014-11-26 | 荣信电力电子股份有限公司 | The protection of many level flexible high pressure direct current transportation power model and bypass topology |
| CN103954893A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Thyristor shunt detection circuit and method used for voltage source converter |
| CN203894367U (en) * | 2014-05-09 | 2014-10-22 | 国家电网公司 | Thyristor shunting detection circuit for voltage source transverter |
| CN104991131A (en) * | 2015-06-12 | 2015-10-21 | 中国科学院电工研究所 | Flexible direct-current power-transmission converter-valve half-bridge structure power module test device |
| CN110138191A (en) * | 2018-02-02 | 2019-08-16 | 荣信汇科电气技术有限责任公司 | The error protection and shunting device of modular multi-level converter power module |
Non-Patent Citations (1)
| Title |
|---|
| 模块化多电平换流器功率模块过压保护策略及优化;李鑫等;《电测与仪表》;20190510;第56卷(第9期);第43-48、55页 * |
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