电力系统保护与控制2017，Vol.45Issue(19)：46-54,9.DOI:10.7667/PSPC161579
保护用电流互感器传变特性分析
Analysis of protective current transformer transient response
摘要
Abstract
The current transformer (CT) is the data source of relay protection. With the development of grid, a new topic is presented due to various class CT connected to relay protection. To solve this problem, the transfer characteristics of P and TPY class CT are analyzed firstly and the main affecting factors are pointed out in this paper. Then the reason of low remanence is explained theoretically based on equivalent circuit model of TPY class CT and the numerical simulation for which is carried out using Jiles-Atherton theory of ferromagnetic hysteresis. The characteristics and laws during a saturated condition are described. Formulas are developed for estimating the transient response of Rogowski coil CT, which show the consistency with P and TPY class CT. Finally, the transient response of three types CT is compared and its effect on relay performance is discussed.关键词
TPY级电流互感器/电子式电流互感器/罗氏线圈/磁滞回线/剩磁/差动保护Key words
TPY CT/ECT/Rogowski coil/hysteresis loop/remanent flus/differential protection引用本文复制引用
戴魏,郑玉平,白亮亮,邹志杨,潘书燕,吴崇昊..保护用电流互感器传变特性分析[J].电力系统保护与控制,2017,45(19):46-54,9.基金项目
国家电网公司科技项目资助"提升数据源差异及数据异常情况下保护设备可靠性关键技术研究"(合同号DW1600017) （合同号DW1600017）
