电力系统保护与控制2025，Vol.53Issue(2)：50-61,12.DOI:10.19783/j.cnki.pspc.240420
多端直流配电系统负载变流器相位补偿控制策略
Phase compensation control strategy for load converters in multi-terminal DC distribution system
摘要
Abstract
In multi-terminal DC distribution systems,the system damping is reduced by the constant power characteristics of the load converters with constant power control,which can easily cause DC voltage and current oscillations,leading to system instability.Therefore,a phase compensation control strategy based on DC voltage feedforward is proposed.Firstly,the DC side impedance model of the load converter is established,and is reduced to a first-order impedance model based on the continuous fraction theory.Secondly,based on the first-order impedance model,the main factors affecting the negative damping characteristics of the load converter are analyzed,and a phase compensation control strategy based on DC voltage feedforward is proposed.The strategy can correct the load converter impedance to positive damping characteristic across the entire frequency range,thereby improving the stability of the DC distribution system.Finally,taking a three-terminal DC distribution system as an example,the effectiveness of the proposed control strategy is verified through Simulink simulation and hardware-in-the-loop experiment on StarSim.关键词
多端直流配电系统/电压源型变流器/相位补偿/稳定性分析Key words
multi-terminal DC distribution system/voltage source converter/phase compensation/stability analysis引用本文复制引用
唐欣,屈贝,张睿宁,李晓萌,李珍..多端直流配电系统负载变流器相位补偿控制策略[J].电力系统保护与控制,2025,53(2):50-61,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52377167). 国家自然科学基金项目资助(52377167) （No.52377167）
