摘要
为提高电网运行的安全性和可靠性,对电压互感器进行暂态仿真分析、对铁磁谐振进行实时检测并探究铁磁谐振的机理都十分必要.应用Preisach理论分析PT磁化特性,得到不同类型铁磁谐振的励磁电感特性.基于PT一次侧三相电压之和与一次侧中性点电流,提出铁磁谐振检测方法.在电磁暂态仿真软件PSCAD/EMTDC平台下,对典型10kV配电系统进行了建模仿真,结果表明提出的检测方法能够及时有效地判别单相接地故障和不同类型的铁磁谐振.
In order to improve the security and reliability of the distribution network operation, it is necessary to simulate and analyze transient process of potential transformer for detecting ferroresonance in real time and exploring the mechanism of ferroresonance. In this paper, the Preisach theory was applied to analyzing magnetization characteristics of PT and obtain excitation inductance characteristics of various types of ferroresonance. A ferroresonance detection method was proposed based on the sum of the three-phase voltage and the neutral line current on the primary side of PT. A typical 10 kV distribution system was modeled in PSCAD/EMTIX2, and simulation results showed that the detection method could identify single-phase earth fault and different types of ferroresonance promptly and effectively.
出处
《安徽大学学报（自然科学版）》
CAS
北大核心
2017年第6期86-93,共8页
Journal of Anhui University(Natural Science Edition)
基金
山东省自然科学基金资助项目(ZR2012EEM021)
