基于孤岛检测的微电网并离网切换控制技术  

Switching and Control Strategy for Off-grid and On-grid Operation Based on Islanding Detection

作　　者：任伟[1] 周艺环[1] 张竞文[1] 宋晓林[1] 

机构地区：[1]陕西电力科学研究院,陕西西安710054

出　　处：《陕西电力》2012年第1期71-74,共4页Shanxi Electric Power

摘　　要：针对分布式发电系统中并离网切换控制和孤岛检测问题,提出并实现了基于孤岛检测的微电网并离网切换控制技术。分析了当微电网系统外部电源发生故障时,系统切换至离网运行状态,在并离切换过程中,利用快速孤岛检测技术,通过并离网控制器实现微电网快速孤岛检测与整体隔离,实现微电网由并网到离网无缝快速切换,确保重要负荷不间断供电的可能性,并用实际事例验证了该技术的有效性。In order to solve the problem of switching and control of off-grid and on-grid operation and islanding detection in distributed generation system, this paper presents and implements a new switching and control strategy for the off-grid and on-grid based on islanding detection. When an external power fails, the micro-grid system switches to the off-grid. Fast islanding detection of the micro-grid and the overall isolation are achieved through the controller of off-grid and on-grid, which implements fast seamless switch from on-grid to off-grid to ensure uninterrupted power supply to important load. In 20ll Xian International Horticultural Exposition, wind-solar-storage micro-network integration project verified the validity of the proposed strategy.

关 键 词：分布式发电 微电网 孤岛检测 

分 类 号：TM71[电气工程—电力系统及自动化]