A Fault Detection and Location Method for Sub-module in Half-bridge MMC-HVDC Transmission System

被引：0
|
作者：
Ma Y. [1 ]
Tan L. [1 ]
Ma K. [1 ]
Li X. [1 ]
Li Y. [1 ]
机构：
[1] Guangdong Key Laboratory of Electric Power Equipment Reliability, Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 11期
关键词：
fault diagnosis; fault location; flexible direct current; half-bridge sub-module; modular multilevel converter; sub-module fault characteristics;
D O I：
10.13336/j.1003-6520.hve.20220226
中图分类号：
学科分类号：
摘要：
Modular multilevel converter (MMC) is a key device of voltage-source-converter based high-voltage-direct-circuit (VSC-HVDC) transmission system, the sub-module fault detection technology of which will directly influence the damage severity, even the reliability of the converter or the whole system. Aiming at fault diagnosis and isolation of sub-module, we analyzed the sub-module fault characteristics in half-bridge MMC-HVDC transmission system, based on which a fault detection and location method was proposed. By contrast of the actual value and the reference value of inserted sub-modules, the whole bridge voltage and current can be taken to construct the sub-module fault criterion for the diagnosis of faults such as open-circuit and direct short-circuit of sub-module IGBT, and then the dynamic change of sub-module voltage is further used to locate the faulty sub-module. A ±400 kV two-terminal MMC-HVDC transmission system based on PSCAD/EMTDC is built to conduct the simulated verification, and it is verified that the fault diagnosis and location method is effective. © 2022 Science Press. All rights reserved.
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页码：4600 / 4609
页数：9
相关论文
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