CAJ | 학술논문

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。
위심입연구직류편자대전류호감기（CT）적작용궤리，수선개소료Preisach방진방법적원리급실현방법。재이용CT교험의험증방진방법적정학성지후，통과대직류편자、철심재료、이차부하등인소종합작용하적CT전변특성진행방진분석，게시료직류편자대CT적작용궤리。문장제출적방진방법가용우게시CT재현유편자수평하적오차변화규률，이보증전망적계량공평성화운행안전。
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.