山东电力技术2026，Vol.53Issue(5)：50-59,10.DOI:10.20097/j.cnki.issn1007-9904.250416
基于模型预测控制的级联型光伏逆变器非均匀光照下并网控制策略
Grid-connected Control Strategy of Cascaded Photovoltaic Converters Under Non-uniform Illumination Based on Model Predictive Control
摘要
Abstract
In the field of grid-connected photovoltaic power generation,the cascaded grid-connected converter shows great development potential,thanks to its capability to boost power generation efficiency under uneven illumination.However,independent maximum power point tracking(MPPT)regulation in each sub-module can lead to DC bus voltage imbalances,undermining system stability.Thus,when controlling grid-connected current,DC bus voltage balance must also be considered,turning the control strategy into a multi-objective challenge.To tackle this,a multi-objective finite control set model predictive control method(FCS-MPC)is proposed for a two-stage photovoltaic cascaded grid-connected converter.This method establishes prediction models for grid-connected currents and DC bus voltages across different switch states.By incorporating PI control and a cost function design in model predictive control,it simultaneously achieves grid-connected current regulation,total DC bus voltage maintenance,and voltage balance among DC buses.A nine-level cascaded H-bridge(CHB)photovoltaic converter model was built in MATLAB/Simulink to test system performance under various conditions.Simulation results show that the proposed method ensures excellent steady-state operation and dynamic response.关键词
级联型多电平逆变器/模型预测控制/直流电压平抑/功率均衡/光伏并网Key words
multilevel converter/model predictive control(MPC)/DC-voltage stabilization/power balance/photovoltaic generation分类
信息技术与安全科学引用本文复制引用
顾文波,谢依帆,马鑫,李旭涛,李宏强..基于模型预测控制的级联型光伏逆变器非均匀光照下并网控制策略[J].山东电力技术,2026,53(5):50-59,10.基金项目
宁夏回族自治区重点研发计划项目"大型风光电基地构网型储能运行优化技术及装置研发"(2024BEE02007) （2024BEE02007）
国网宁夏电力有限公司科技项目"考虑构网型变流器的宁夏局部极高占比新能源汇集接入技术研究"(5229DK24000J).Key R&D Projects of Ningxia"Operation Optimization Technology and Device Research and Development of Grid-type Energy Storage in Large-scale Wind-photovoltaic Base"(2024BEE02007) （5229DK24000J）
Technology Projects of State Grid Ningxia Electric Power Co.,Ltd."Research on the Integration Technology of Extremely High Local Proportion New Energy Resources in Ningxia Using Grid-Forming Converters"(5229DK24000J). （5229DK24000J）
