| 引用本文: | 王振,任孟干,国建宝,等.直流输电换流阀晶闸管过电压保护研究[J].电力系统保护与控制,2020,48(10):182-187.[点击复制] |
| WANG Zhen,REN Menggan,GUO Jianbao,et al.Research on overvoltage protection of a thyristor on DC converter valves[J].Power System Protection and Control,2020,48(10):182-187[点击复制] |
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| 摘要: |
| 晶闸管承受过电压的能力较弱，瞬时过电压可导致晶闸管的击穿。首先研究了直流输电核心设备之一晶闸管换流阀发生晶闸管过电压击穿对直流输电系统的影响，分析了直流输电换流阀晶闸管配置过电压保护的必要性。然后对BTC和BOD两种晶闸管过电压保护方式进行了理论计算与分析，并采用PSPICE软件搭建了仿真模型进行仿真分析。最后在实验室搭建实验电路对两种过电压保护电路性能进行了验证。研究表明两种保护方式均可以实现晶闸管过电压保护的要求。 |
| 关键词: 晶闸管 过电压保护 BOD BTC 仿真模型 |
| DOI：10.19783/j.cnki.pspc.190799 |
| 投稿时间：2019-07-10修订日期：2020-01-08 |
| 基金项目:南方电网公司科技项目资助(CGYKJXM20160082) |
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| Research on overvoltage protection of a thyristor on DC converter valves |
| WANG Zhen,REN Menggan,GUO Jianbao,ZHANG Yunxin,ZHOU Liang,LIU Daomin |
| (Maintenance & Test Center, CSG EHV Power Transmission Company, Guangzhou 510663, China;C-EPRI Electrical Engineering Co., Ltd., Beijing 102200, China) |
| Abstract: |
| The ability of a thyristor to withstand overvoltage is weak, and transient overvoltage can cause the breakdown of the thyristor. The thyristor is one of the core devices of DC transmission. First, this paper analyzes the influence of thyristor overvoltage breakdown on the DC transmission system and the necessity of configuring thyristor overvoltage protection on the DC converter valve. Second, BTC and BOD thyristor overvoltage protection methods are calculated and analyzed theoretically, and a simulation model is built by PSPICE software for analysis. Finally, an experimental circuit is built in the laboratory to test the performance of two overvoltage protection circuits. Studies show that both protection methods can achieve the requirements of thyristor overvoltage protection. This work is supported by Science and Technology Project of China Southern Power Grid Company (No. CGYKJXM 20160082). |
| Key words: thyristor overvoltage protection BOD BTC simulation model |
