| 直流输电中换流变压器零序过流保护的探讨 |
| |
| 引用本文： | 刘家军,罗明亮,徐玉洁.直流输电中换流变压器零序过流保护的探讨[J].电力技术,2014(6):22-25. |
| |
| 作者姓名： | 刘家军 罗明亮 徐玉洁 |
| |
| 作者单位： | 许继电气股份有限公司,河南许昌461000 |
| |
| 摘 要： | 针对银川极1换流变压器在空充时Y0/Y换流变零序过流误动导致开关跳闸这一事故展开思考,通过理论分析发现,换流变压器网侧发生接地故障时,流经Y0/Y换流变压器中性点和Y0/△换流变压器中性点零序电流的大小有很大差异.同时,建立仿真模型并以南方电网在许继集团的换流变保护装置RTDS试验中数据和波形为佐证.综合分析后得出：对于Y0/Y换流变压器而言,其零序过流保护没有投入的必要.
|
| 关 键 词： | 高压直流输电 换流变压器 零序过流保护 接地故障 零序电抗 RTDS |
Investigation on Converter Transformer＇s Zero-Sequence Over-Current in HVDC System |
| |
| Authors: | LIU Jia-jun LUO Ming-liang XU Yu-jie |
| |
| Affiliation: | ( XJ Electric Limited Corporation, Xuchang 461000, China ) |
| |
| Abstract: | An investigation is made on the accident of switch trip in Yinchuan Pole 1 converter transformer caused by zero-sequence over-current malfunction of Y0/Y converter transformer during charging period. It was found that a big difference exists between the zero-sequence current that goes through the Y0/Y converter transformer neutral point and the one that goes through the Y0/A converter transformer neutral point when the line-side earth fault occurs. A model simulation is made based on the data and wave shape of XJ GROUP＇s converter transformer protective device-RTDS used in CSG＇s project. It is concluded through synthetic analysis that the zero-sequence over-current protection is not necessary for Y0/Y converter transformer. |
| |
| Keywords: | HVDC converter transformer zero-sequence over-current protection earth fault zero-sequence resistance RTDS |
| 本文献已被 维普 等数据库收录！ |
