光储直流级联系统拓扑设计及控制策略研究
Research on Topology Design and Control Strategy of Photovoltaic Storage DC Cascade System
张横益 1李睿 2张宇 3王皓靖3
作者信息
- 1. 上海交通大学,智慧能源创新学院,上海 200240
- 2. 上海交通大学,智慧能源创新学院,上海 200240;电力传输与功率变换控制教育部重点实验室(上海交通大学),上海 200240
- 3. 国网上海市电力公司,上海 200122
- 折叠
摘要
光储直流级联系统中光伏与储能级联后接入直流母线,储能系统的加入显著提高了系统全局最大功率跟踪的工作范围.传统低压光伏发电系统通过功率优化器改变端口特性实现全局最大功率点跟踪(MPPT)、提高光伏组件对光能的转换效率,但在功率优化器输出电压范围一定时,系统全局MPPT工作范围较窄.面向于低压光伏发电系统,提出一种光储直流级联系统拓扑设计与控制策略,提高了系统全局最大功率工作范围,实现了储能与光伏的协调控制.实验分析证明了所提系统拓扑与控制策略的有效性.
Abstract
In the cascaded photovoltaic-storage system,the photovoltaic and the energy storage DC are concatenated and connected to the DC bus.The addition of the energy storage system significantly improves the working range of the global maximum power tracking system.The traditional low-voltage photovoltaic power generation system realizes the global maximum power point tracking(MPPT)and improves the conversion efficiency of photovoltaic modules to light energy by changing the port characteristics of the power optimizer.However,when the output voltage range of the pow-er optimizer is certain,the global MPPT working range of the system is narrow.A topology design and control strategy of optical storage DC cascade system for low voltage photovoltaic power generation system are proposed,which im-proves the global maximum power working range of the system and realizes the coordinated control of energy storage and photovoltaic.Experimental analysis proves the effectiveness of the proposed system topology and control strategy.
关键词
光伏发电/功率优化器/控制策略Key words
photovoltaic power generation/power optimizer/control strategy引用本文复制引用
出版年
2025
NETL
NSTL
万方数据