计及分布式电源的配电系统可靠性研究

发布时间：2018-01-06 08:18

本文关键词：计及分布式电源的配电系统可靠性研究　出处：《太原理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着世界能源危机、环境问题的加剧,分布式电源技术的发展得到国家和供电企业越来越多的重视。与此同时,配电系统可靠性的研究也逐步成为研究的热点,其可靠性不仅与用户的生活息息相关,而且影响供电企业的经济效益。分布式电源接入配电系统后,会改变传统配电系统的结构、运行方式等,因此,准确评估计及分布式电源的配电系统的可靠性,为配电系统的规划、建设及运行提供理论支持,促进新能源的发展。本文的主要内容和研究成果如下： (1)研究了分布式电源的特点、类型及分布式电源接入对配电系统的影响,为计及分布式电源配电系统可靠性的研究奠定了理论基础。 (2)分析了配电系统的可靠性评估方法及步骤,分别对解析法和蒙特卡洛法进行程序设计,采用Matlab中的M文件进行了程序编制,并对IEEE RBTS Bus6测试系统进行可靠性评估,结果表明：对计及分布式电源的配电系统可靠性评估采用蒙特卡洛法能够更好的考虑到分布式电源出力随机性的特点。 (3)综合考虑风能与光能随机性、间歇性的特点,提出了风力发电机、光伏发电系统模型的简化方法,并建立风力发电机、光伏发电系统的多状态模型。建立了用自回归滑动平均模型获得风速的时间序列模型和风力发电机的出力模型；用HOMER软件模拟光照强度的时间序列模型和光伏发电系统的出力模型；建立了储能装置的可靠性评估模型和时变负荷模型,最终验证了所建模型的正确性与有效性。 (4)针对分布式电源接入配电系统的形式、运行方式,对含分布式电源的配电系统可靠性进行了研究。分析了系统发生故障时,孤岛的分类、划分原则及模型的求解方法,依据分布式电源的种类、接入位置、接入容量对配电系统的可靠性进行了评估,得出如下结论：配电系统中加入分布式电源,能够提升孤岛内负荷点的可靠性；系统的可靠性得到明显提升；加入储能装置后,负荷点可靠性和系统可靠性提升更高；随着DG接入容量的增大,负荷点可靠性和系统可靠性得到提升；与分布式电源接入点较近的负荷点可靠性改善最高；分布式电源分散地接入馈线的末端,能更好地改善系统的可靠性水平。
[Abstract]:With the increasing of world energy crisis and environmental problems , the development of distributed power supply technology has been paid more and more attention by the state and power supply enterprises . At the same time , the research on reliability of distribution system is becoming the hot spot of research . At the same time , the reliability of distribution system is not only related to the life of users , but also affects the economic benefits of power supply enterprises . The main contents and research results of this paper are as follows : ( 1 ) The characteristics , types of the distributed power supply and the influence of distributed power supply on the distribution system are studied , and the theoretical basis is laid for the research of the reliability of the distributed power distribution system . ( 2 ) The reliability evaluation method and the steps of the power distribution system are analyzed , the analysis method and the Monte Carlo method are designed respectively , the program is programmed by using the M file in Matlab , and the reliability evaluation of the IEEE RBTS Bus6 test system is carried out , and the result shows that the reliability evaluation of the distribution system of the meter and the distributed power supply can better take into account the characteristics of randomness of the distributed power supply . ( 3 ) Considering the randomness and intermittent characteristics of wind energy and light energy , a simplified method of wind power generator and photovoltaic power generation system is put forward , and a multi - state model of wind power generator and photovoltaic power generation system is established . The time series model and the output model of the wind power generator are established by using the self - regressive sliding average model . The reliability evaluation model and the time - varying load model of the energy storage device are established , and the correctness and effectiveness of the proposed model are finally verified . ( 4 ) According to the form and operation mode of distributed power supply , the reliability of power distribution system with distributed power supply is studied . The reliability of power distribution system is improved according to the type , access location and access capacity of distributed power supply .

【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732

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