基于储能系统的光伏发电系统功率缓冲控制研究  

Energy storage-based power buffering control for photovoltaic power generation system

作　　者：李凡[1] 张建成[1] 

机构地区：[1]新能源电力系统国家重点实验室,华北电力大学,河北保定071003

出　　处：《储能科学与技术》2013年第6期593-597,共5页Energy Storage Science and Technology

基　　金：国家自然科学基金项目(51177047)

摘　　要：光伏发电系统输出的最大功率随外界环境变化而波动,无法满足负荷的供电需求,针对该问题,建立了基于储能系统的光伏发电系统结构,介绍了光伏发电系统运行原理,分析了系统功率与直流母线电压的关系,设计了无源式储能系统和有源式储能系统对功率进行缓冲以满足控制目标。仿真结果表明,有源式储能系统较无源式储能系统有更好的功率调节作用,通过双向DC-DC变换器的储放能量自动切换控制,使得光伏发电系统输出的功率与负荷需求功率良好匹配,直流电压稳定。The maximum power of photovoltaic power generation system varies with the changes of the external environment and is unable to meet the power requirements of loads. In order to solve this problem, this paper established the structure of photovoltaic power generation system based on energy storage, introduced the operation principle of photovoltaic power generation system, analyzed the relationship between the power and the DC bus voltage, and designed passive energy storage system and active energy storage system to buffer the power for satisfying control target. The simulation results show that the active energy storage system has better regulation of power than the passive energy storage system. Through the bi-directional DC-DC converter automatically switching control for storing energy, the power ofphotovoltaic power generation system is well matching with the power of loads, and DC voltage is also stability.

关 键 词：储能系统 光伏发电 功率缓冲 双向DC—DC变换器 

分 类 号：TM615[电气工程—电力系统及自动化]