直流偏磁对电流互感器的作用机理研究  

Action Principle of DC Magnetic Bias to Current Transformer

作　　者：卢树峰 杨世海 蔡霁霖[2] 周赣[2] 徐敏锐 

机构地区：[1]江苏省电力公司电力科学研究院,南京211103 [2]东南大学电气工程学院,南京210096

出　　处：《电测与仪表》2014年第14期6-11,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金(51207020);国家电网公司总部科技项目(直流偏磁对电流互感器误差特性影响的研究)

摘　　要：为深入研究直流偏磁对电流互感器(CT)的作用机理,首先介绍了Preisach仿真方法的原理及实现方法。在利用CT校验仪验证仿真方法的正确性之后,通过对直流偏磁、铁心材料、二次负荷等因素综合作用下的CT传变特性进行仿真分析,揭示了直流偏磁对CT的作用机理。文章提出的仿真方法可用于揭示CT在现有偏磁水平下的误差变化规律,以保证电网的计量公平性和运行安全。The main purpose of this paper is to reveal action principle of DC Magnetic Bias to current transformers （CT）. Firstly, a simulation method based on Preisach theory is presented and its validity is verified with the corresponding CT calibration experiments. Then, through the simulation and analysis of CT transfer characteristics under the action of multiple factors, such as DC magnetic bias, core material and secondary load, the action mechanism of DC Magnetic Bias are revealed step by step. This simulation method can be used to calculate the error variation of CT with DC Magnetic Bias which can guarantee the metering accuracy and safe operation of power grid.

关 键 词：电流互感器 直流偏磁 传变特性 铁心材料 二次负荷 

分 类 号：TM452[电气工程—电器]