电力建设2025，Vol.46Issue(1)：86-96,11.DOI:10.12204/j.issn.1000-7229.2025.01.008
基于自适应分段双下垂的孤岛交直流混合微电网功率协调控制
Control Strategy of Islanded AC/DC Hybrid Microgrid Power System Based on Adaptive Segmented Double-Droop
摘要
Abstract
An adaptive segmented double-droop control strategy is proposed to improve the power-allocation accuracy of bidirectional AC/DC converters in islanded AC/DC hybrid microgrids.First,a normalization method is used to convert the AC frequency and DC voltage into the same interval to determine the transmission power of the converter.Second,to plan the operating mode of the bidirectional AC/DC converter reasonably,the load states of the AC and DC subnets are divided.By setting the action threshold to avoid frequent starts and stops,an adaptive function is selected to add the stage Ⅱ droop expression when the power difference exceeds the starting threshold by maintaining the conventional double-droop control in segment Ⅰ.Thus,the bidirectional AC/DC converter can attain power balance faster when the active power difference of the subnetwork is large,which improves the coordinated control ability and service life of the bidirectional AC/DC converter.The system is decoupled to verify the stability of the proposed control strategy.Finally,an islanded AC/DC hybrid microgrid is constructed in MATLAB/Simulink and RTLAB to analyze and verify the adaptive segmented double-droop control strategy proposed herein.关键词
交直流混合微电网/双下垂控制/双向AC/DC变换器/功率协调控制Key words
AC/DC hybrid microgrid/dual-droop control/bidirectional AC/DC converter/power coordinated control分类
动力与电气工程引用本文复制引用
米阳,顾符亦可,李春煦,鲍薇,燕跃豪,刘晓辉,杨亚男..基于自适应分段双下垂的孤岛交直流混合微电网功率协调控制[J].电力建设,2025,46(1):86-96,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.52477107)and the Shanghai Natural Science Foundation(No.22ZR1425500). 国家自然科学基金项目((52477107) （No.52477107）
上海市自然科学基金项目(22ZR1425500) （22ZR1425500）
