主动移频孤岛检测参数对并网电能品质的影响  

Influence of Active Frequency Drift Islanding Detection Parameters on Power Quality on Grid

作　　者：周素梅[1] 袁晓玲[1] 范发靖[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《机械制造与自动化》2013年第1期184-186,共3页Machine Building & Automation

摘　　要：采用Qf0×Cnorm空间描述法分析主动移频式孤岛检测方法的检测盲区,对带正反馈的主动移频式(AFDPF)孤岛检测方法的盲区大小与反馈增益间的关系进行了分析,并对初始扰动系数进行了修正,减小AFDPF孤岛检测法对并网电能品质的影响。运用Matlab软件分析比较了修正前后的孤岛检测盲区。仿真结果表明,参数修正后孤岛检测盲区明显把盲区推向更高品质因数区域,而且降低了谐波畸变率。实现了品质因数小于2.5时,AFDPF孤岛检测方法存在无孤岛检测盲区区域。Non-detection zones （NDZs） are important index to evaluate the performance of islanding detection methods. A proper NDZs mapping can reflect application area of islanding detection effectively. In this paper,Qf0×Cnorm, space mapping is adopted in NDZs detection of active frequency drift with positive feedback （AFDPF）. Relationship between NDZs size of AFDPF and feedback gain is deduced, and coefficient of initial disturbance is amended. NDZs are compared by simulation before and after coefficients are amended. Simulation results reveal that NDZs after coefficient amended are located in high factor of quality area and the harmonic distortion is reduced, if factor of quality is less than 2.5, there are no NDZs for AFDPF of islanding detection.

关 键 词：正反馈主动移频 孤岛检测 检测盲区 谐波畸变率 

分 类 号：TM77[电气工程—电力系统及自动化]