中国电机工程学报2024，Vol.44Issue(9)：3665-3678,中插28,15.DOI:10.13334/j.0258-8013.pcsee.222472
MMC结构的分布式光伏系统功率不平衡优化方案
Power Imbalance Optimization Scheme of Distributed PV System With MMC Structure
摘要
Abstract
The modular multilevel converter(MMC)has become the research hotspot of large-scale grid-connected photovoltaic(PV)inverter because of its modular structure.However,under different light intensity and temperature,the power generation between PV modules is different,leading to the imbalance of power between bridge arm and phase in MMC.Therefore,this paper first analyzes the performance mechanism of MMC-PV system under power imbalance,and then proposes an optical energy storage routing based on MMC structure.Its control strategy not only satisfies the power requirement of AC and DC ports,but also realizes power self-balancing between bridge arms and phases,which improves PV utilization rate and system stability.At the same time,the configuration constraints of PV and ESS are analyzed in detail due to the influence of power transmission limit of submodules in the bridge arm.Finally,the correctness and effectiveness of the proposed topology and control strategy are verified by simulation and experiments.关键词
模块化多电平变换器/光伏/储能系统/功率不均衡/功率限值Key words
modular multilevel converter(MMC)/photovoltaic(PV)/energy storage system(ESS)/power imbalance/power limitation分类
信息技术与安全科学引用本文复制引用
孙孝峰,刘鑫磊,张㼆,滕甲训,刘玥良,赵巍..MMC结构的分布式光伏系统功率不平衡优化方案[J].中国电机工程学报,2024,44(9):3665-3678,中插28,15.基金项目
河北省自然科学基金重点项目(E2021203162,F2022203005)) （E2021203162,F2022203005）
河北省科级计划项目(236Z2004G). Project Supported by National Natural Science Fund Project in Hebei Province(E2021203162,F2022203005) （236Z2004G）
S&T Program of Hebei Province(236Z2004G). （236Z2004G）
