电力系统保护与控制2026，Vol.54Issue(7)：24-33,10.DOI:10.19783/j.cnki.pspc.250957
基于MMC电容能量支撑的配电网在线频率优化控制策略
Online frequency optimal control for distribution networks based on MMC capacitor energy support
摘要
Abstract
To enhance the coordination between the capacitor energy of modular multilevel converters(MMC)and system frequency regulation during primary frequency control,an online frequency optimal control strategy for distribution networks based on MMC capacitor energy support is proposed.First,based on a frequency response model,the relationship between the frequency nadir and the intervention frequency of capacitor energy is analyzed.The frequency nadir is estimated online through power-frequency characteristic fitting,and an optimal intervention frequency is determined by considering the margins for capacitor energy release and absorption as well as reliability constraints.Then,a global coordinated control strategy for converter stations is proposed.By improving the traditional droop characteristics,the capacitor energy of non-disturbed converters is coordinated to provide frequency support without requiring real-time communication.Finally,an AC/DC distribution network model is built in MATLAB/Simulink to verify the effectiveness and feasibility of the proposed control method.关键词
模块化多电平换流器/电容能量/一次调频/协调控制/频率最低点Key words
modular multilevel converter/capacitor energy/primary frequency regulation/coordinated control/frequency nadir引用本文复制引用
董磊,梁备,马文忠,王玉生,孟令彤,郑绍通..基于MMC电容能量支撑的配电网在线频率优化控制策略[J].电力系统保护与控制,2026,54(7):24-33,10.基金项目
This work is supported by the National Natural Science Foundation of China(No.52277208). 国家自然科学基金项目资助(52277208) （No.52277208）
中国石油重大科技攻关应用科技专项资助(2023ZZ31YJ01,2023ZZ31YJ03) （2023ZZ31YJ01,2023ZZ31YJ03）
