分布式发电新型孤岛检测原理与装置开发

在电源类型为同步发电机的分布式发电孤岛检测中,相位偏移法得到应用。本文针对该方法所存在的灵敏性和可靠性问题,提出了一种基于电压相位偏移和频率变化的复合型孤岛检测新方法,并详细阐述了该方法的检测原理。依据新的检测原理和实现要求,开发出了适用于直接并网同步发电机的孤岛检测装置,并对其进行了动态模拟试验。试验结果表明,该装置运行可靠稳定,具有较小的检测死区,能满足孤岛检测的要求。

New Type of Islanding Detecting Method and Device Implementation for Distributed Generation

To cope with the sensitivity and reliability problems of the vector shift method which is suited for synchronous generator,a new composite method based on vector shift and frequency variation for islanding detection is proposed.The establishment and working principle of the proposed method are described in detail.Based on the method,an islanding detection device is developed for synchronous generator.The device is tested by dynamic physical model simulation,and simulation results show that the device operates reliably and stably with a small non-detection zone,which can meet the requirements of islanding detection.