电力系统保护与控制2025，Vol.53Issue(10)：153-164,12.DOI:10.19783/j.cnki.pspc.240963
基于光储协调电压自均衡的光伏直流汇集方案研究
A photovoltaic DC collection scheme based on PV-storage coordinated voltage self-balancing
摘要
Abstract
Photovoltaic(PV)DC collection systems offer advantages such as high efficiency,low-cost,and good stability.The multi-port,modular DC collection systems have strong controllability and ease of voltage boosting.However,power mismatches among the power generation units often lead to module output voltage imbalances,thereby restricting generation efficiency and system stability.To address this issue,a two-stage boost DC collection scheme is proposed based on PV-storage coordinated voltage self-balancing technology.First,an input-independent-output-series(IIOS)PV DC collection system is constructed based on heterogeneous sub-module integration.This system achieves voltage boosting and collection of independent PV units while ensuring output voltage self-balancing among modules.Then,a second-stage boost is realized using an isolated MMC DC-DC converter,reducing the boosting requirement at each stage.Finally,a simulation model is built in the Matlab/Simulink environment.Simulation results show that the proposed PV DC collection scheme exhibits high reliability and efficiency,maintaining excellent power generation performance and system stability even under severe power mismatches among generation units.关键词
光伏直流汇集/DC-DC变换器/电压自平衡/光储协调/隔离型MMCKey words
photovoltaic DC collection/DC-DC converter/voltage self-balancing/PV-storage coordination/isolated MMC引用本文复制引用
甄新梅,贺宇阳,于大川,于飞..基于光储协调电压自均衡的光伏直流汇集方案研究[J].电力系统保护与控制,2025,53(10):153-164,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.62103218). 国家自然科学基金项目资助(62103218) （No.62103218）
