南方电网技术2026，Vol.20Issue(4)：29-38,10.DOI:10.13648/j.cnki.issn1674-0629.2026.04.003
考虑解锁闭锁状态切换的VSC恒导纳建模方法
VSC Constant Admittance Modeling Method Considering the Unlocking and Locking State Switching
摘要
Abstract
To address the issue of simulation accuracy degradation caused by virtual power losses in traditional associated discrete circuit(ADC)models for voltage-source converters(VSCs)in real-time simulation,a dual-mode constant admittance method is proposed.Firstly,by analyzing the mechanism of equivalent energy storage mutation during switching state transitions,the accumula-tion law of virtual losses under high-frequency PWM modulation is revealed.Secondly,based on the characteristics of switching ac-tions during unlocking and blocking states,a constant admittance model for the converter in the unlocked state is constructed using the proposed semi-implicit decoupling method,eliminating virtual losses while maintaining a constant admittance matrix.For the blocked state,where switching transitions are fewer,the traditional ADC model is retained.Simulation results demonstrate that the proposed converter modeling exhibits minimal virtual power dissipation and high accuracy in both unlocked and blocked conditions,with no numerical oscillations during state transitions.关键词
电压源换流器/实时仿真/ADC恒导纳/虚拟功率损耗/半隐式解耦Key words
voltage source converter(VSC)/real-time simulation/ADC constant-admittance/virtual power loss/semi-implicit decoupling分类
信息技术与安全科学引用本文复制引用
张嘉豪,郭琦,李宪鹏,卢远宏,郭海平,黄立滨,郭天宇,姚蜀军,刘晋..考虑解锁闭锁状态切换的VSC恒导纳建模方法[J].南方电网技术,2026,20(4):29-38,10.基金项目
国家自然科学基金资助项目(U23B6008) （U23B6008）
中国南方电网有限责任公司科技项目(ZBKJXM20232299,ZBKJXM20232301). Supported by the National Natural Science Foundation of China(U23B6008) （ZBKJXM20232299,ZBKJXM20232301）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(ZBKJXM20232299,ZBKJXM20232301). （ZBKJXM20232299,ZBKJXM20232301）
