适用于模块化级联光伏发电直流并网系统的均压策略  

Voltage Balancing Strategy for DC Grid-connected Photovoltaic Power Generation Systems with Modular Cascaded Structure

作　　者：宁光富 陈武[1,2] 曹小鹏[1,2] 陶以彬[3] 李官军[3] 

机构地区：[1]东南大学电气工程学院,江苏省南京市210096 [2]江苏省智能电网技术与装备重点实验室,东南大学,江苏省南京市210096 [3]中国电力科学研究院(南京),江苏省南京市210003

出　　处：《电力系统自动化》2016年第19期66-72,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51307024);中央高校基本科研业务费专项资金资助项目(2242016K41005);国家电网公司科技项目(DG71-15-039)~~

摘　　要：光伏发电升压汇集接入直流电网是光伏发电发展的一个重要方向,提出了一种适用于模块化级联的光伏发电直流并网系统结构及其各模块电容电压均衡控制策略,并重点分析了该策略中输入功率比重前馈机制的原理。随后,在PLECS环境中搭建了7个模块级联的仿真模型,仿真结果验证了该控制策略的有效性和可行性。最后,通过一个含有3个模块的硬件平台对其进行了实验验证,实验结果表明了所提出的控制策略具有控制简单、易于实现、可靠性高、无需额外传感器等优点。Photovoltaic power generation accessing the direct current（DC）grid is an important development orientation of the photovoltaic power.A scheme for the DC grid-connected photovoltaic power generation system with a novel capacitor voltage balancing control strategy is proposed by focusing on analysis of the input power ratio feedforward.Then,with the PLECS software,a simulation model of seven modules is built with the effectiveness and feasibility of the proposed control strategy verified by simulation results.Finally,a hardware platform containing three modules is set up to show the proposed control strategy is simple to control,easy to implement,highly reliable,and without additional sensors.

关 键 词：光伏发电 直流并网 模块化级联 均压控制 功率比重前馈机制 

分 类 号：TM615[电气工程—电力系统及自动化]