基于半周期积分波形对称原理的电子式互感器数据失效识别研究  

Study on Invalid Data Identification in Electronic Transformer Based on the Scheme of Waveform Symmetry Using Half Cycle Integrating

作　　者：苏建明 姚晖 SU Jianming;YAO Hui(State Grid Tongling Power Supply Company,Tongling,Anhui 244000,China)

机构地区：[1]国网铜陵供电公司,安徽铜陵244000

出　　处：《东北电力技术》2018年第2期59-62,共4页Northeast Electric Power Technology

摘　　要：文中利用正弦波半周期对称性特点提出了一种识别电子式互感器数据失效的识别方法,利用正弦周期函数前后半个周期积分绝对值相差数值的绝对值与前后半个周期中积分最大值的比值来衡量波形的对称度,对不对称度进行模糊区间划分,根据模糊区间进行相应的延时判别进而识别数据异常,动作实例计算结果证明了该方法能够有效可靠识别电子式互感器数据异常。The signal processing unit arranged in electronic transformer based on Rogowski coil easily affectes by the temperature and electromagnetic interference,causing invalid data and resulting in malfunction of relay protection.A recognition of electronic transformer invalid data using the scheme of half-cycle symmetry features in sine waveform was proposed.In this paper,the symmetry of the waveform calculated by the ratio of the absolute value in difference between the front,the second half for the periodic function,the maximum value of the integral in the first and second half cycles.Different range of asymmetry values judged using delay time for distinguishing invalid data.The degree of asymmetry is divided for adopting fuzzy area.The results show that the method proposed in this paper can effectively and reliably identify the electronic transformer invalid data.

关 键 词：电子式互感器 数据失效 半周期积分 不对称度 

分 类 号：TM452[电气工程—电器]