微电网中的线路阻抗测量方法研究  

Line impedance measurement method for micro-grid

作　　者：胡金杭[1] 施永[2] 周晨[1] 李春来[3] 

机构地区：[1]中国电力科学研究院,南京210061 [2]合肥工业大学电气工程学院,合肥230009 [3]国网青海省电力公司电力科学研究院,西宁810008

出　　处：《电测与仪表》2016年第18期28-34,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金青年科学基金项目(51307042);青海省光伏发电并网技术重点实验室项目(2014-Z-Y34A)

摘　　要：微网是解决大规模分布式发电并网的有效方法,微网中逆变器的功率均分及微网系统的建模及稳定性分析是目前的研究热点。要实现微网逆变器功率均分控制和建立微网系统精确模型,微网中馈线阻抗是不可缺少的重要参数,现有多种线路阻抗实时测量方法基本是基于分布式发电或者大电力系统应用考虑,在微电网中应用受到限制。分析了现有的阻抗测量方法的优缺点,针对现有线路阻抗测量技术存在的不足和应用场合限制,提出一种基于MGCC协调控制的,适用于微网中应用的线路阻抗测量方法。文章针对所提的测量方法进行了理论分析和仿真验证,证明了所提方案的可行性。The micro-grid is as effective approach to solve the large-scale grid-connected distributed generation,and the power sharing between inverters and micro-grid modeling and stability analysis are hot research field in micro-grid research. To implement power sharing control of micro-grid inverter and establish accurate modeling of micro-grid system,the feeder line impendence is an important and indispensable parameter. The existing line impedance real-time measurement methods are based on distributed generation and application of large-scale power generation system,which is restricted in micro-grid. This paper summarized and analyzed each of these methods,identified their advantages and weaknesses,and then proposed a line impedance measurement method of micro-grid based on MGCC. The theoretical analysis and simulation results verify the feasibility of the proposed method.

关 键 词：微电网 线路阻抗 下垂控制 分层控制 

分 类 号：TM751[电气工程—电力系统及自动化]