摘要
提出了一种获得微观无源的PT高频模型方法,该方法首先利用矢量拟合获得Foster形式的网络函数稳定的表达式,然后利用起作用集方法求解带约束条件的二次规划获得满足无源的Foster形式的网络函数,最后综合获得微观无源的电路模型。根据无源修正前后网络函数的对比验证了本文所提方法的有效性。
Very fast transient overvoltage generated in gas insulated substation（GIS） will introduce into secondary by potential transformer（PT）,and which will affect secondary equipment,so it must be analyzed.PT circuit model according to measured frequency domain network function could be implanted into EMTP or PSPICE,but if the model has active element,then the simulation maybe unsteady.For solving the problem,a method to obtain PT high frequency microscopic passivity circuit model is proposed.First,the method uses vector fitting to obtain steady Foster formula,and then active set method is used to solve quadratic programming with constraint to obtain passive Foster formula.At last,a circuit synthesis method for rational functions is applied to build microscopic passive circuit model.The effectiveness of the method is verified by the comparison of network function before and after passive adjustment.
出处
《电工技术学报》
EI
CSCD
北大核心
2012年第4期77-82,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(50977031)
中央高校基本科研业务费专项资金资助项目
关键词
电压互感器
高频电路模型
电路综合
微观无源
起作用集方法
Potential transformer
high frequency circuit model
circuit synthesis
microscopic passivity
active set method
