【作者】 朱林； 段献忠； 范荣奇； 苏盛；

【Author】 Zhu Lin Duan Xianzhong Fan Rongqi Su Sheng Electric Power Security and High Efficiency Lab,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China

【机构】 华中科技大学电力安全与高效湖北重点实验室；

【摘要】 在未来的数字化变电站中,电子式互感器、合并单元、通信网络等任何一个环节的异常或故障,均可能导致保护设备接收到错误的采样值数据而产生误动作。利用改进的证据理论,提出了一种融合多个互感器信息对由错误数据引起的"故障"进行识别的新型继电保护容错控制方法。为降低通信网络负载,减少融合算法的计算时间,提出了一种基于母线保护范围的互感器组合方式。仿真算例表明,本文所提方法可有效的防止数据源出错而引起的保护装置误动,并可对数据采集装置进行在线监测和故障诊断,对未来数字化变电站中的继电保护防误设计具有一定的参考价值。更多还原

【Abstract】 In future digital substations,relaying protection may maloperate when receiving false sampled value due to abnormity or failure of electronic instrument transformer,merging unit,communication network or power supply.The paper presents a new method for fault-tolerant control of relaying protection,which can fuse information from multi-sensors to identify fault caused by false sampled value using improved evidence theory.Moreover a simple and available method of sensors combination is proposed in order to reduce computational complexity and communication network load.The study cases show that the proposed method can prevent relaying protection from maloperating when receiving false sampled value,and realize on-line monitoring and fault diagnosis for data collection systems.It proves a reference valve for the design of relaying protection anti-misoperation in future digital substations.更多还原