电流互感器饱和检测的混合算法及其工程实现  

A hybrid algorithm for saturation detection of current transformer and its engineering realization

作　　者：郑茂然[1] 张志良 栾俐 张啸宇 ZHENG Maoran;ZHANG Zhiliang;LUAN Li;ZHANG Xiaoyu(Power Dispatching Contact Center, CSG, Guangzhou 510623, China;State Grid Shandong Electric Power Maintance Company Jinan 253300, China;State Grid Zaozhuang Power Supply Company, Zaozhuang 277000,China;School of Electrical Engineering, Shandong University, Jinan 253300, China)

机构地区：[1]中国南方电网电力调度控制中心,广东广州510623 [2]国网山东省电力公司检修公司,山东济南250061 [3]国网山东省电力公司枣庄供电公司,山东枣庄277000 [4]山东大学电气工程学院,山东济南250061

出　　处：《电气应用》2019年第6期36-42,共7页Electrotechnical Application

摘　　要：由于铁心的非线性励磁特性,电力系统中配置的铁磁式电流互感器易受外部因素影响发生磁饱和,从而导致一次电流无法正常传变,这既可能引起保护装置对系统运行状态的错误判断,也在一定程度上反映着电流互感器(TA)设备性能的变化。为准确识别TA饱和并深入分析设备发生饱和的规律,对基于TA饱和的谐波与波形特征而提出的一种谐波比和分段积分法相结合的TA饱和检测混合算法进行了深入的探讨。并针对混合算法在实际工程应用中面临的多种技术问题,结合现场的大量录波数据,对混合算法进行改进以完善其工程实用性。算例分析表明,改进后的混合算法既能有效识别TA饱和,又利于利用录波数据快速准确收集TA饱和信息,为评价TA性能及分析饱和发生规律创造了条件。Due to the non-linear excicttion characteristics of the core, the ferroelectric current transformer arranged in the power system is susceptible to magnetic saturation due to external factors, which leads to the inability of the primary current to pass normally. This may cause the wrong judgment of the operating condition of the protection device, But also to a cerctin extent, reflects the changes in TA equipment performance. In order to accurately identify TA saturation and analyze the law of equipment saturation, based on the preliminary work, based on the TA saturation of the harmonic and waveform characteristics, a harmonic ratio and segmencttion integration method of TA saturation detection hybrid algorithm is discussed. Aiming at the various technical problems faced by the hybrid algorithm in the practical engineering application, combining with the large number of recorded dact, the hybrid algorithm is improved to improve its engineering practicability. The results show that the improved hybrid algorithm can effectively recognize TA saturation and facilictte the rapid and accurate collection of TA saturation information by using the recorded dact, which creates the conditions for evaluating TA performance and analyzing the law of saturation.

关 键 词：电流互感器 饱和 故障录波 谐波比 分段积分法 

分 类 号：TM452[电气工程—电器]