电子式电流互感器暂态特性检测系统研究

Study on Transient Characteristics Test Method of Electronic Current Transformer

在超、特高压电网中,为确保保护装置的正确动作,必须采用暂态保护用电流互感器。针对现有检测机构在电子式互感器(ECT)暂态性能检测方法、检测装备试验能力不足等问题,笔者提出了一种电子式电流互感器暂态特性"等安匝"检测方法,给出了暂态特性合成试验回路设计方案。并对其热性能进行仿真计算,计算结果表明,所设计的试验回路基本可满足TPE级电子式电流互感器暂态特性的试验要求,不会对其暂态误差产生影响。

In EHV and UHV power system,it is necessary to use current transformer for transient protection to ensure the correct operation of the relay protection device. For the lack of detection method and insufficient test ability of detection equipment in testing institutions, the authors presented an ＂equal ampere-turns＂ test method for detecting the transient characteristics of electronic current transformer. In this paper, the synthetic test circuit design of transient characteristics is given, and its thermal performance is simulated and calculated. The results show that the test circuit meets the transient characteristics testing requirements of electronic current transformer.