分布式发电系统孤岛检测方法研究

分布式发电系统并网运行时处于孤岛状态会对设备造成损坏,影响电力系统安全正常运行,严重时甚至可能会威胁到线路检修人员的人身安全.因此,对分布式发电系统孤岛检测方法的研究具有现实意义.文中综述分布式发电系统孤岛检测的基本方法.根据孤岛检测的基本原理和分布式电源的类型进行了分类,从3个大方面(基于通信技术、同步分布式发电机本地检测和基于逆变器的分布式发电系统本地检测) 对孤岛检测方法进行了阐述.每一方面又根据不同的检测原理分为若干具体检测方法.详细阐述了各种检测方法的理论依据和性能,比较了其优缺点,并对每种检测方法在实际应用中的可行性和效果进行了论述.对于具有很大发展前景的基于逆变器的分布式发电系统孤岛检测指明了未来发展方向.

Review of island detection methods of distributed generation

In the grid-connection,the distributed generation system in the status of the islanding is liable for damage to equipment,affecting the performance of the utility.Seriously,island may create a hazard for utility line-worker.Islanding detection methods for distributed generation system are reviewed.The detection methods are classified in terms of the islanding detection principle and the distributed resources.The communication-based detection scheme and local detection schemes for synchronous distributed generators and local detection schemes for inverter DG are expounded.Each part concludes several detecting methods according to different detection theory.Their performances respectively are analyzed in detail.The advantages and disadvantages of all methods are compared.The feasibility and effect of every method is discussed.Finally,the developing trend of the inverter DG islanding detection method is discussed.