正反馈主动移频式孤岛检测法分析与改进  

Analysis and Improvement of Active Frequency Drift with Positive Feedback Islanding Detection Method

作　　者：陆斌 吴传秀 LU Bin;WU Chuan-xiu(Shanghai Institute of Technology y Shanghai 201418 ,China)

机构地区：[1]上海应用技术大学,上海201418 [2]江苏苏云医疗器材有限公司,江苏连云港222005

出　　处：《电力电子技术》2019年第3期51-53,128,共4页Power Electronics

摘　　要：针对传统带正反馈主动移频式孤岛检测方法(AFDPF)的缺点,提出了一种改进方案。该方案在电网正常频率波动范围内仅进行周期性的频率扰动;在孤岛发生时,根据负载性质确定频率扰动方向,采用一种截断系数算法加速频率偏移。实验结果表明:该方案能够加快检测速度,缩小检测盲区,减小对电力系统的谐波污染,完全满足孤岛检测相关标准的要求。Aim at a traditional active frequency drift with positive feedback(AFDPF), an improved method is proposed. It has a period current disturbance within the normal fluctuation of grid frequency under island happening and a truncated system algorithm accelerates frequency drift.Experimental results verify that the proposed method meets the requirement of anti-islanding standard well, it can detect the islanding operation effectively with faster detecting speed, smaller non-detection zone, and less current distortion from an inverter connected with power system.

关 键 词：孤岛检测 主动移频 检测盲区 

分 类 号：TS736.2[轻工技术与工程—制浆造纸工程]