大电流氧化锌避雷器阻性电流测试仪开发  

Development of resistive current tester for high-current ZnO arrester

作　　者：刘凡[1] 曾宏[1] 胡灿[1] 许安[1] 刘敬民[1] 吴国峰 王献伟 

机构地区：[1]四川电力试验研究院,四川成都610072 [2]保定恒信达电气有限公司,河北保定071051

出　　处：《电力自动化设备》2010年第1期110-115,共6页Electric Power Automation Equipment

摘　　要：为实现维护运行中的大电流氧化锌避雷器(MOA)阻性电流的现场试验,设计了一种在不停电情况下的大电流氧化锌避雷器阻性电流测试仪。开发了0～20mA的电流变送器和电压传感器,论述了阻性电流的测量方法及测试技术(三相同时测量防干扰技术、DSP技术、FFT算法等)。所设计的电流变送器和电压传感器将现场电流、电压信号经过简单放大滤波,由A/D转换后送入微处理器,然后由软件程序进行控制并计算后送液晶显示和打印机打印。对专门定制的特殊避雷器进行的实验室试验和现场试验结果证明,所设计的仪器测试数据准确、运行可靠。For the field maintenance of high-current ZnO arresters,an on-line resistive current tester is designed for it. The 0- 20 mA current transducer and voltage transformer are developed. The methodology and technology of resistive current test are introduced,including interference prevention by triphase simultaneous measuring,DSP,FFT,etc. The field voltage and current are detected by the current transducer and voltage transformer of tester and, after magnification,filtering and A/D conversion,sent to microprocessor. Control and calculation are carried out by software program and the results are sent for display and printing. Lab test and site test of specially-made ZnO arresters prove that the test data of developed tester are accurate and reliable.

关 键 词：氧化锌避雷器 阻性电流 三相同时测量 相间干扰抑制 DSP FFT 

分 类 号：TU895[建筑科学]