负序电流扰动孤岛检测方法在微电网中的应用  

Application of Negative-sequence Current Disturbance Based Islanding Detection Method in Micro-grid

作　　者：陈钢 刘玮[2] 陈苗[2] 杨毅[2] 李宁[2] 

机构地区：[1]南方电网综合能源有限公司,广州510075 [2]天津天大求实电力新技术股份有限公司,天津300384

出　　处：《电力系统及其自动化学报》2013年第6期154-159,共6页Proceedings of the CSU-EPSA

摘　　要：微电网技术是开发可再生能源和提高供电可靠性的有效形式,而快速有效的孤岛检测方法是微电网系统灵活控制的关键问题之一。文中以微电网逆变器接口的控制策略为主要研究对象,采用负序电流扰动法作为孤岛检测方法。针对微电网系统检测孤岛之后在模式发生切换过程可能会遇到的电流冲击问题,采用了一种基于电压模式的并网控制方法。仿真结果表明该方法能够在孤岛发生时实现系统平滑地从并网运行模式切换到孤岛运行模式。Micro-grid is an effective form to develop renewable energy and to enhance the reliability of power supply. How to detect islanding fast and effectively is the key problem for the flexibility of micro-grid system. This paper focus- es on the inverter interface control strategy and the negative-sequence current disturbance method is adopted to detect islanding.In allusion to transient current issue at the time of model switching after detecting islanding, a modified grid- connected voltage control method is adopted. Simulation results show that the proposed method can guarantee smooth transition from grid-connected mode to islanding mode when the islanding occurs.

关 键 词：微电网 孤岛检测 有源负序扰动 平滑切换 

分 类 号：TM464[电气工程—电器]