光伏储能系统恒流充电模式下光伏电池的稳定工作区

发布时间：2018-01-18 08:30

本文关键词：光伏储能系统恒流充电模式下光伏电池的稳定工作区　出处：《电网技术》2017年02期 　论文类型：期刊论文

【摘要】：基于接口变换器输出恒流控制稳定的必要条件,研究揭示了光伏储能系统恒流充电模式下光伏电池的稳定工作区。以前置电容式Buck变换器为例,建立了基于光伏电池动态电路模型的连续导电模式(continuous conduction mode,CCM)系统小信号模型;分析了恒流充电模式下光伏接口变换器采用不同控制回路构成时系统的闭环传递函数,并根据赫尔维茨判据得出输出恒流控制稳定的必要条件;在此基础上,得出了恒流充电模式下光伏电池的稳定工作区;最后通过150 W样机进行了实验验证。研究结果表明:恒流充电模式下,光伏电池的稳定工作区是唯一、确定的,且稳定工作区的具体类型取决于接口变换器的控制回路构成。
[Abstract]:Based on the necessary condition of output constant current control stability of interface converter, the stable working area of photovoltaic cell in constant current charging mode of photovoltaic energy storage system is revealed. The former capacitive Buck converter is taken as an example. Based on the dynamic circuit model of photovoltaic cells, a small signal model of continuous conduction modeCCMs system is established. The closed-loop transfer function of the photovoltaic interface converter with different control loops under constant current charging mode is analyzed, and the necessary condition of output constant current control stability is obtained according to Herwitz criterion. On this basis, the stable working area of photovoltaic cells in constant current charging mode is obtained. The experimental results show that the stable working area of photovoltaic cells is unique and definite under constant current charging mode. And the specific type of stable working area depends on the control circuit composition of the interface converter.
【作者单位】：南京航空航天大学自动化学院;南通大学电气工程学院;
【基金】：国家自然科学基金项目(51477077,51207075)~~
【分类号】：TM46;TM914.4
【正文快照】： 0引言将可再生能源与高效节能型负载相结合,可以有效缓解能源危机和减轻环境污染。为此,近年来出现了电动汽车光伏充电桩[1-3]、光伏发光二极管(light emitting diode,LED)路灯[4-5]等多种新型光伏利用形式。在这些光伏系统中,光伏电池通过DC-DC变换器与蓄电池直接连接在一

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