光伏发电系统并网运行并网点电压升高调整研究.pdf

2013 电力系统自动化专委会学术交流研讨会论文集 光伏发电系统并网运行并网点电压升高调整研究 黄欣科，王环，关雅娟，王一波，许洪华 ( 中国科学院电工研究所；北京市 100190) 摘要: 以光伏发电系统并网点电压升高为研究对象，从电力系统功率传输理论角度分析了 光伏发电系统并网点电压升高原因及电压调整原理，阐述了多种电压调整策略及优缺点， 特别对光伏发电系统有功功率和无功功率电压控制策略进行了研究，提出了基于瞬时电压 的IQ(U) 动态无功电流控制策略，最终搭建了3kW 光伏发电系统实验平台，对提出的IQ(U) 方法进行了实验验证，取得了良好的实验结果，为大规模光伏发电系统并网运行提供了技 术支持。 关键词: 光伏发电；并网逆变器；电压升高；过电压；电压调整；无功控制； Grid-Connected Photovoltaic Power Generation Systems with Point of Common Coupling Voltage Rise Regulation HUANG Xinke, WANG Huan，GUAN Yajuan, WANG Yibo，XU Honghua （Institute of Electronic Engineering Chinese Academy of Science, Beijing 100190, China ） Abstract ：This paper discusses the voltage rise of photovoltaic power generation system (PvPGS) at the point of common coupling (PCC). It analyzes the reason of voltage rise and it regulation principle within the perspective of power transmission theory in power system, and elaborates advantages and disadvantages of some voltage regulation method, two control strategies are presented, named, active power curtailment and reactive power absorption. Particularly, It propose a effective solution—IQ(U) method to dynamically control of voltage at PCC. Theoretical analysis and experiment results are presented to validate the effectiveness of the proposed control scheme for voltage rise mitigation. It is expected that the presented solution can provide a useful theoretical basis and design reference for maximize the penetration of PvPGS. This work is supported by National High Technology Research and Development Program of China (863 Program)-(No.2011AA05A106) and National Science and Technology Support Project Plan of China- Keywords ：Photovoltaic Generation; Grid-C