用于光伏并网的组合级联式功率转换系统复合功率控制策略研究  

Compound power control of hybrid cascaded power conversion system for grid-connected photovoltaic power station

作　　者：吴俊勇[1] 艾洪克 田明杰[1] 张巨瑞 冯宝泉[3] 

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]北京京能清洁能源电力股份有限公司,北京100028 [3]北京能源投资(集团)有限公司,北京100022

出　　处：《北京交通大学学报》2014年第5期90-96,102,共8页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：北京市科技计划资助项目(D131104002013003)

摘　　要：根据光伏电站并网要求,分析了HC-PCS拓扑结构及特点,提出HC-PCS对光伏电站有功与无功综合补偿的复合功率控制策略.该复合控制策略兼顾光伏电站的有功平滑和电压稳定需求来确定HC-PCS的输出电流参考值,对HC-PCS输出有功与无功补偿进行协调控制,同时附加变化率控制,充分利用其快速功率调节特性,并且对电池充放电进行保护.对所提出的控制策略进行了仿真验证,结果表明,基于电池储能的HC-PCS可有效改善光伏电站并网特性,有助于提高光伏电站的低电压穿越能力,并对电网提供一定的动态无功支撑.Based on the analysis of the structure and characteristics of HC-PCS topology,this paper proposed the compound power control strategy of reactive and active power compensation,meeting the requirements of PV connected to grid. The compound control strategy coordinated the PV output active power smoothing and voltage stability to determine the current reference value for HC-PCS,harmonizing the output active and reactive power compensation. Meanwhile,added rate control,making full use of its fast response,also protected the batteries. The proposed control strategy simulation is verified. HC-PCS can effectively improve the characteristics of PV connected to grid,and help to improve the low voltage ride through capability of PV.

关 键 词：光伏电站 组合级联式功率转换系统(HC-PCS) 复合功率控制策略 变化率控制 

分 类 号：TM61[电气工程—电力系统及自动化]