摘要
相位偏移法是基于同步发电机的分布式电源进行孤岛检测常用方法之一,文中详细介绍了相位偏移法的原理及算法,针对传统相位偏移法存在的灵敏度和可靠性矛盾的问题,给出一种基于同步发电机端电压相位偏移和频率变化的复合型孤岛检测方法,并在PSCAD/EMTDC中对该方法进行了仿真验证,结果表明该方法能在保证可靠性的前提下,准确地检测出孤岛状态,并缩小孤岛检测死区。
Phase shift is one of the common methods of islanding detection for distributed generation based on synchronous generator. The principle and algorithm of phase shift method are detailed in this paper. To solve the contradiction problem of reliability and sensitivity of conventional vector shift method, this paper presents a composite islanding detection method utilizing both angle change and frequency variation derived from synchronous generator terminal voltage. Simulations are performed using generic PSCAD/EMTDC. Results show that islanding state can be accurately detected and the non-detection zone can be effectively narrowed down by the composite method on the premise of reliability.
出处
《江苏电机工程》
2013年第2期66-70,共5页
Jiangsu Electrical Engineering
关键词
分布式发电(DG)
孤岛检测
相位偏移法
频率变化
distributed generation （DG）
islanding detection
phase shift method
frequency variation
