基于差动原理的多功能数字式极性测试仪的关键技术研究

Key Technology of Multifunctional Digital Polarity Tester Based on Differential Principle

为了提高变电站电压互感器和电流互感器的变比以及极性测试结果的准确性,利用电磁感应原理、电流差动原理以及AD转换等原理,设计了一种便携式的极性测试仪器。通过模拟仿真与实际验证得出,多功能数字式极性表的测试精度高,测试结果准确、直观,测试方法简单,完全能够满足测试需要,大幅节省了极性测试时间,提高了工作效率,加快了工程的调试进度。

In order to improve the accuracy of voltage transformer and current transformer transformation ratio and polarity test results,a portable polarity measuring instrument is designed based on the principles of electromagnetic induction,current differential and AD conversion.Through simulation and actual verification,it is found that the multi-function digital polarity meter has high test precision,accurate and intuitive test results,simple test method,and can completely meet the test needs,the time of polarity testing is greatly saved,thus improving the work efficiency and speeding up the debugging progress of the project.