电力系统保护与控制2025，Vol.53Issue(5)：93-103,11.DOI:10.19783/j.cnki.pspc.240794
基于零极点匹配技术的电力电子开关恒导纳模型
A power electronic switch constant admittance model based on pole-zero matching technique
摘要
Abstract
An L/C constant admittance switch model has the advantages of a constant admittance matrix and high real-time simulation efficiency.This is one of the main switch models in electromagnetic transient simulation.However,virtual power loss significantly affects the simulation accuracy.To eliminate the virtual power loss,a L/C constant admittance switch model based on pole-zero matching technique is proposed.First,the switch structure is selected according to the Z-transform pole distribution law on the basis of stability.Then,the switch model is discretized with a pole-zero matching technique,while the model parameters are determined based on the steady-state and transient characteristics.Finally,by analyzing the mechanism of virtual power loss,a constant initialization technique is proposed to calculate the historical current sources in different switching states.Taking a two-level voltage source converter as the experimental object,a real-time simulation hardware platform is built to verify the feasibility of the proposed model.Simulation results show that,compared with the traditional L/C constant admittance switch model,the virtual power loss of the proposed switch model is reduced by 92%,the oscillation time of the model is reduced by 20%～30%,and the constant initialization technique can completely eliminate the virtual power loss.关键词
电力电子开关/恒导纳模型/虚拟功率损耗/零极点匹配技术/恒定初始化Key words
power electronic switch/constant admittance model/virtual power loss/pole-zero matching technique/constant initialization引用本文复制引用
杜金鹏,王康,汪光森,刘著..基于零极点匹配技术的电力电子开关恒导纳模型[J].电力系统保护与控制,2025,53(5):93-103,11.基金项目
This work is supported by the General Program of National Natural Science Foundation of China(No.51477179). 国家自然科学基金面上项目资助(51477179) （No.51477179）
