10kV单相变压器高频无源宏模型的建立与特快速暂态仿真

10kV单相变压器高频无源宏模型的建立与特快速暂态仿真

赵京生;张重远

【期刊名称】《华北电力大学学报(自然科学版)》 【年(卷),期】2012(039)003

【摘要】A method is proposed to setup the high frequency macro circuit model for transformer and simulation is performed for a lOkV transformer. The x circuit model is setup based on the admittance parameters, and the modified vector fitting method is used to approximate the Y-parameters by rational functions firstly; To guarantee the simulation stability of the circuit model, rational functions of Y-parameters and component values are optimized by active-set method programming and pattern search algorithm to meet the strictly passive conditions, and finally the it circuit model is synthesized by only RLCG with positive values. The simulation results of a lOkV single-phase transformer is presented, confirming the validity of the proposed method.%提出了一种适用于变压器的高频无源宏电路模型的建立方法,并应用该方法对一个10 kV变压器进行了建模仿真.该方法首先依据洲量得到的导纳参数建立其π型等效电路,然后用改进矢量匹配法对导纳参数进行有理函数逼近；为建立能进行稳定仿真的电路模型,应用起作用集方法对导纳参数的有理函数进行无源优化,再用模式搜索法对电路元件进行优化,使电路综合得到的π型电路模型仅由参数值为正值的RLCG元件组成,最终实现了变压器电路模型的严格无源性.对10 kV单相变压器进行仿真计算验证了该方法的有效性.