| 引用本文: | 舒兵成,李海锋,武霁阳,郑 伟,王 钢.采样频率对直流线路行波保护的影响[J].电力自动化设备,2016,36(5): |
| SHU Bingcheng,LI Haifeng,WU Jiyang,ZHENG Wei,WANG Gang.Influence of sampling frequency on traveling wave protection of DC line[J].Electric Power Automation Equipment,2016,36(5): |
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| 摘要: |
| 结合直流线路行波保护原理及各判据的实现方法，利用云广± 800 kV直流输电系统的PSCAD／EMTDC仿真模型，从采样数据不确定性、区内外故障区分度、暂态干扰等方面分析了不同采样频率对直流线路行波保护各种判据的影响，结果表明采样频率的变化主要会对直流线路行波保护中的电压变化率判据产生较大影响。最后从整体性能角度给出了直流线路行波保护采样频率选取的建议。 |
| 关键词: 电力系统保护 直流线路 行波保护 采样频率 采样数据不确定性 直流输电 |
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| 基金项目:国家自然科学基金资助项目（51577072，51007024）；中央高校基本科研业务费专项资金资助项目（2013ZZ028） |
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| Influence of sampling frequency on traveling wave protection of DC line |
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SHU Bingcheng1, LI Haifeng1, WU Jiyang1, ZHENG Wei2, WANG Gang1
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1.School of Electric Power，South China University of Technology，Guangzhou 510640，China;2.Maintenance & Test Center，CSG EHV Power Transmission Company，Guangzhou 510663，China
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| Abstract: |
| Combined with the principle of DC line traveling wave protection and the implementation methods of various criteria，the PSCAD／EMTDC simulation model of Yunnan-Guangdong ±800 kV DC trans-mission system is used to analyze the influence of sampling frequency on the criteria of DC line traveling wave protection from the aspects of sampling data uncertainty，discrimination between internal and external faults，transient interference，etc. The analytical results show that，the change of sampling frequency mainly affects the criterion of voltage change rate. Some suggestions about the selection of sampling frequency are given from the aspect of overall performance of DC line traveling wave protection. |
| Key words: electric power system protection DC line traveling wave protection sampling frequency sampling data uncertainty DC power transmission |
