基于改进电压/频率正反馈的孤岛检测方法研究  

Islanding detection method based on improved voltage/frequency positive feedback

作　　者：王西伟[1] 陈利利 熊炜[3] 

机构地区：[1]福建省电力有限公司漳州电业局,福建漳州363000 [2]贵州大方发电有限公司,贵州大方551600 [3]贵州大学电气工程学院,贵州贵阳550025

出　　处：《电子技术应用》2013年第9期66-69,共4页Application of Electronic Technique

基　　金：贵州省2011年科学技术基金计划项目(黔科合J字[2011]2060)

摘　　要：孤岛检测是分布式发电系统并网运行时的一个重要问题。在电压相位突变检测方法、电压-有功正反馈检测方法和基于无功-频率下垂特性的正反馈无功扰动检测方法的基础上,结合三者的优势,提出了一种基于改进电压/频率正反馈的孤岛检测方法。该方法克服了采用单一电压相位突变检测方法在负载近似呈阻性和功率相匹配时失效的问题,不存在检测盲区,对系统电能质量影响较小,并通过Matlab软件仿真验证了该方法的正确性。Islanding detection is an important issue for the distributed generation system. Based on the voltage phase jump ,the vohage-active power positive feedback and the reactive power disturbance and combining with their advantages, the paper puts forward an islanding detection method based on improved voltage/frequency positive feedback. This method can overcome the shortcoming that the phase jump detection method fails to work under resistive load and the balance of the distributed generation system output and the load power, which has no detection dead zone and has little influence on power quality. The correctness of the method is verified by the Matlab simulation.

关 键 词：孤岛检测 相位突变 电压-有功正反馈 无功功率扰动 

分 类 号：TM743[电气工程—电力系统及自动化]