南方电网技术2016，Vol.10Issue(10)：18-23,30,7.DOI:10.13648/j.cnki.issn1674-0629.2016.10.003
直流微电网光伏发电系统自适应电压支撑策略
Adaptive Voltage Support Strategy for Photovoltaic Generation System in DC Microgrid
摘要
Abstract
When the capacity of photovoltaic system is relatively large in DC microgrid,the photovoltaic (PV)system should have the function of bus voltage support. Firstly,a supportive relationship between the output power of PV and the bus voltage of DC microgrid is constituted in this paper,and the real-time photovoltaic output P-V curve is fitted based on sampling values by using the Newton difference method,then the DC voltage control reference value is calculated according to the real-time fitted P-V curve and the rela-tionship between the output power of PV and the bus voltage of DC microgrid. The economy and voltage support capability of photo-voltaic generation are considered comprehensively by introducing the output coefficient,and adaptive voltage support is achived by se-lecting output coefficient through adaptive strategy. Moreover,the maximum power point tracking and constant power control are inte-grated in this strategy.The principle of this strategy is simple and easy to be realized,it improves the utilization efficiency of PV power generation without narrowing voltage support range for DC bus voltage,and also can enhance the ability for photovoltaic power genera-tion in multiple scenes. Simulation results verify the effectiveness and superiority.关键词
直流微电网/光伏发电系统/自适应电压支撑/牛顿插值法Key words
DC microgrid/photovoltaic generation system/adaptive voltage support/Newton difference method分类
信息技术与安全科学引用本文复制引用
喻磊,雷金勇,田兵,胡辉勇,魏文潇,郭晓斌,李鹏..直流微电网光伏发电系统自适应电压支撑策略[J].南方电网技术,2016,10(10):18-23,30,7.基金项目
国家高技术研究发展计划（863计划）项目（2014AA052001）；南方电网公司科技项目（K-KY2014-009）；南方电网科学研究院科技项目（SEPRI-K154001）。@@@@Supported by the National High Technology Research and Development Program of China （863 Program）（2014AA052001）；Science &Technology Projects of CSG （K-KY2014-009）；Science &Technology Projects of SEPRI （）
