一种逆变并网型分布式电源统一模型  

A Unified Model of Grid-Connected Distributed Generation through Inverters

作　　者：马亚辉[1] 李欣然[1] 徐振华[1] 王玲[2] 韦肖燕[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]广东电网公司电力科学研究院,广州510600

出　　处：《电工技术学报》2013年第9期145-154,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50977023;51277056);湖南省自然科学基金(10JJ2043);国家863计划项目(2011AA05A113);国家973计划项目(2012CB215100)的资助项目

摘　　要：为研究分布式电源(DG)对配电网综合负荷特性的影响,详细分析含燃气轮机发电、光伏电池、燃料电池、直驱式风力发电等在内的逆变型分布式电源的各自特点及其共有特性,提出了由受控电压源串联等值阻抗构成的逆变型分布式电源的统一动态模型,推导出了该模型的完整解析描述。在不同的电压跌落水平条件下,采用综合改进的遗传算法进行模型参数辨识,并对该模型的自描述能力、泛化能力和参数稳定性进行了分析验证。验证结果表明,该模型具有较好的适用性,能够较好地描述逆变型分布式电源的动态等效特性。In order to study the influence of distributed power generation（DG） on composite load characteristics of distribution network, this papel： make a study on the general and specific features of grid-connected DG through inverter in detail, such as micro-turbine generation（MTG）, photovoltaic（PV）, fuel cell（FC）, and directly driven wind turbine with permanent magnet synchronous generator （D-PMSG）. A unified dynamic model composed of a controlled voltage source and an equivalent impedance in series is proposed and its integrated analytical description is deduced here. The model parameters are identified by a synthetically improved genetic algorithm under different voltage disturbance levels, and then its self-description ability, generalization ability and parametric stability are verified. The verification indicates that the unified model has high applicability and can well describe the equivalent dynamic characteristic of grid-connected DG through inverters.

关 键 词：电力系统 分布式电源 逆变并网 统一动态模型 

分 类 号：TM715[电气工程—电力系统及自动化]