08电力1班01508107刘珈池(翻译)08电力1班01508107刘珈池(翻译).doc

A Voltage based Protection for Micro-grids containing Power Electronic Converters. 含电力转换器的微电网继电保护 Abstract: Protecting Micro-grids containing micro-sources equipped with power electronics interfaces is a major challenge for engineers developing techniques to exploit renewable energy sources for electricity generation.Conventional techniques based on overcurrent protection have major limitations and new techniques have to be explored.The method described in this paper provides reliable and fast detection for different types of faults within the micro-grid. The micro-source output voltages are monitored and then transformed into dc quantities using the d-q reference frame. Any disturbance at the micro-source output due to a fault on the network will be reflected as disturbances in the d-q values. This disturbance is used to detect the fault and initiate the isolation the faulted section. Analysis and simulation results are presented for different types of faults within the microgrid. 摘要：保护含有配备电力电子接口的微源的微电网是一个重大的挑战，这个挑战是针对那些工程师为了发电开发技术去探索再生能源的。基于过电流保护的常规技术有很多的限制，新技术的开发时不我待！在本文中描述的方法能够可靠快捷的发现微电网中存在不同类型的错误。先是微电压的输出电压可被监测的，然后使用DQ参考帧转换成直流数量。在微电网输出过程中会因为网络中一个错误导致的任何干扰将会在DQ参考帧中被反映出来。这个干扰是用来发现错误以及开启故障隔离。分析和模拟的结果将以不同类型的微电网的错误呈现出来。 Keywords: Microgrid, micro-sources, fault detection, solidstate convertion. 关键词：微网，微源，错误发现，固态转换 INTRODUCTION Ⅰ. 导言 Restrictions on the expansion of traditional centralized generating and delivery systems are becoming so rigorous in the industrialized countries that they cannot reasonably be expected meet future electricity demand growth at acceptable cost. Meanwhile, technological advances in the exploitation of renewable energy, notably improved power electronics that permit grid interconnection of asynchronous generation sources, is tilting the economics of power generation back towards smaller scales, thereby reversing a century long trend towards the central control paradigm. Moreover, the electrical and economic relationships between customers a