摘要
针对传统正反馈频率偏移孤岛检测方法存在的缺陷,给出了一种改进的正反馈的频率偏移孤岛检测方法。通过对负载特性的实时判断,对扰动信号的方向进行实时修正,避免了添加固定扰动情况下当负载不同而引起的孤岛检测失败、延缓等问题。仿真分析表明可以在满足并网标准的情况下,对不同性质的负载有效、准确、及时地完成孤岛检测。
Perspective to the imperfections existing in the traditional positive-feedback frequency drive islanding detection,this paper presents an improved positive-feedback frequency drift islanding detection. Through its real-time judgment of load characteristics,it makes realtime correction of the direction of disturbance signal,thus avoiding failure / delay of the islanding detection caused by different loads in the case of adding fixed disturbance. The simulation analysis shows that when the grid connection standard is met,this method can complete effective,accurate and timely islanding detection for loads of different nature.
出处
《电气自动化》
2015年第2期47-50,共4页
Electrical Automation
关键词
光伏并网
孤岛
主动频率
正反馈
检测盲区
photovoltaic grid connection
islanding
active frequency
positive feedback
non-detection zone
