光伏空调防孤岛方法探讨

Discussion on Anti-islanding Methods of Photovoltaic Air Conditioning

自从光伏空调推出以来,凭借其环保、节能和可再生等优势,备受广大用户的关注,已成为未来空调发展的方向之一。我国于2005年11月发布关于光伏系统并网技术要求的国家标准,根据标准的研究要求,至少各一种主动和被动式防孤岛方案,过/欠电压、过/欠频率作为后备保护。光伏空调涉及并网,因此必须具有防孤岛效应自动保护功能,由于常规发电的光伏发电模式与光伏空调模式还是存在差异的,本文重点探讨并提出一个适合光伏空调防孤岛检测方法,为光伏空调实现安全并网运行提供参考。

The photovoltaic air conditioning is popular during customers and has become one of the developing trends of air conditioning in the future because of its advantages of environmental friendly material、energy-saving function and renewables. A national standards about grid connected photovoltaic system technology was released in November 2005 in domestic, according to this policy, all products must have at least one kind of active and passive solutions, over-voltage and under-voltage, or over-frequency and under-frequency protection as backup protection. Photovoltaic air conditioner involves the interconnection to the grid, thus the grid inverter must have islanding prevention protection automatically. Because the differences still exist in photovoltaic power generation mode and photovoltaic air conditioning mode, this paper mainly discusses and puts forward a suitable antiislanding detection method of photovoltaic air conditioning, provides references for photovoltaic air conditioning grid connected safe operation.