| 引用本文: | 申洪明,宋璇坤,李轶凡,等.基于确定系数的失灵保护优化技术方案[J].电力系统保护与控制,2019,47(22):98-104.[点击复制] |
| SHEN Hongming,SONG Xuankun,LI Yifan,et al.An optimization scheme for breaker failure protection using determination coefficient[J].Power System Protection and Control,2019,47(22):98-104[点击复制] |
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| 摘要: |
| 失灵保护方案的优化对维持电网的安全稳定运行至关重要。详细地分析了电流互感器电流拖尾对失灵保护整定时间的影响，提出了利用最小二乘拟合算法识别电流互感器二次电流特征的方案，进而构建了基于确定系数的新失灵保护启动逻辑。最后分析了拟合数据的选取以及CT选型对新方案的影响。新的启动逻辑既能缩短失灵保护整定时间，又能确保失灵保护不误动。基于PSCAD算例分析验证了新方法的有效性。 |
| 关键词: 电流拖尾 失灵保护 最小二乘法 确定系数 |
| DOI：10.19783/j.cnki.pspc.181536 |
| 投稿时间：2018-12-09修订日期：2019-03-12 |
| 基金项目:2018年国网公司科技指南项目资助(B3441518K002)“面向柔性直流接入的交流侧新型保护控制设计技术研究” |
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| An optimization scheme for breaker failure protection using determination coefficient |
| SHEN Hongming,SONG Xuankun,LI Yifan,ZOU Ge,LIU Ying,JIANG Jing,DU Na,LI Hui |
| (State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China) |
| Abstract: |
| Optimization of failure protection plays a key role in maintaining the power system reliability. The effect of current transformer tailing on breaker failure protection is analyzed in detail. In addition, a novel method of current transformer second current feature identification is proposed based on recursive least square algorithm. Then, a new breaker failure protection with determination coefficient is presented. At last, the effect of fitting results and current type on the new scheme is analyzed. The novel scheme not only shortens the breaker failure protection setting time, but also ensures its malfunction. The simulation proves that the new logic is correct. This work is supported by State Grid Guide Project of Research on New Protection Control Design Technology for AC Side in VSC-HVDC Environment (No. B3441518K002). |
| Key words: current transformer tailing breaker failure protection recursive least square algorithm determination coefficient |
