电子式互感器合并单元的快速数据处理  

Fast Data Processing for Merging Unit of Electronic Transformer

作　　者：王勇[1] 曹保定 姜涛 

机构地区：[1]东北电力大学信息工程学院,吉林省吉林市132012 [2]北京国电四维电力技术有限公司,北京市密云县101500

出　　处：《电网技术》2009年第1期87-91,共5页Power System Technology

摘　　要：结合数字化变电站对计量、保护等功能的特定技术要求,分析了电子式互感器应用中的关键问题,在此基础上阐述了数字化变电站中合并单元的数据处理功能的实现方法。文章讨论了采用Rogowski线圈的电子式电流互感器积分运算的可行方法,针对积分初值及零点漂移问题,提出预估法并采用一阶惯性环节来取代积分环节进行逐步逼近,给出了电流有效值和相位的简便计算方法。仿真分析表明,该算法与传统加数据窗口的离散傅里叶计算方法相比,可有效减少短路故障条件下电流信号的处理时间,且是可行的。此计算方法同样适用于电压信号的处理过程。Considering the special technical requirements to meterage and protection functions of digital substation, the key problems in the application of electronic transformers are analysed. On this basis, the data processing function and its implementation of merging units in digital substation are expounded. In this paper, a feasible approach to integral operation of electronic current transformer by use of Rogowski coil is proposed; and to deal with integral initial value and zero drift, a prediction method is given and the integral link is replaced by one order inertial link to implement successive approximation, for this purpose a contracted calculation approach is put forward. Simulation results show that comparing with traditional discrete Fourier transform （DFT） algorithm with data window added the proposed calculation approach is feasible and can speed up the processing of current signal under short-circuit fault, besides, the proposed algorithm is suitable to the processing of voltage signal as well.

关 键 词：数字化变电站 电子式互感器 合并单元 相位统合 积分初值 

分 类 号：TM45[电气工程—电器]