计及分布式电源的配电网供电可靠性评估

发布时间：2018-01-17 17:13

本文关键词：计及分布式电源的配电网供电可靠性评估　出处：《上海交通大学》2008年硕士论文　论文类型：学位论文

【摘要】： 近年来,全球范围内的分布式电源技术发展迅速,在电力系统中发挥着越来越重要的作用。分布式电源不仅能够提高能源的利用率,而且对于缓解电网峰时缺电的矛盾具有积极意义。从可持续发展、国家能源战略、降低环境污染和建设和谐社会的观点来看,发展分布式电源技术是我国的必然选择。随着分布式电源接入配电网,配电网供电可靠性的评估模型发生了变化。分布式电源与传统电源相比,其输出功率更具有随机性。另外,在传统的配电网可靠性评估中,考察的馈线由单一电源点供电,是辐射式供电方式,任何一条馈线上发生故障,都可能导致馈线后面的负荷全部停电,而分布式电源接入配电网后,网络变为一个多电源与用户相连的网络,当馈线上发生故障时,配电网可能会出现含有分布式电源的孤岛运行方式,相应的可靠性评估模型和方法也将发生变化。本文提出一种计及分布式电源影响的配电网可靠性评估方法。首先根据分布式电源与传统电源不同的特点,建立适用于含分布式电源的配电网可靠性评估的电源模型;然后根据配电网中负荷的重要程度,以最大等值有效负荷为目标函数,建立含有分布式电源的配电网孤岛划分的优化模型,并采用深度优先搜索和广度优先搜索技术求解;结合配电网孤岛运行方式,本文对传统的可靠性评估中的最小路法进行改进,使之适用于含分布式电源的配电网供电可靠性分析计算。通过对IEEE-RBTS Bus6系统的仿真计算,说明了本文提出的模型及算法的有效性。计算结果也表明,分布式电源合理接入配电网后,可以提高配电网的供电可靠性。
[Abstract]:In recent years, distributed power generation technology in the world is developing rapidly, which plays a more and more important role in the power system. Distributed power generation can not only improve the efficiency of energy utilization. And it is of positive significance to alleviate the contradiction between peak and lack of electricity. From the perspective of sustainable development, national energy strategy, reducing environmental pollution and building a harmonious society. The development of distributed power generation technology is an inevitable choice in China. With the distributed power supply connected to the distribution network, the evaluation model of power supply reliability of distribution network has changed. Compared with traditional power supply, the output power of distributed generation is more random. In the traditional reliability evaluation of distribution network, the feeder is supplied by a single power supply point, which is a radiation mode of power supply. Any fault on the feeder line may lead to all power outages behind the feeder line. After the distributed power supply is connected to the distribution network, the network becomes a network with multiple power sources connected to the users. When the feeder fails, the distribution network may have an island operation mode with distributed power. The corresponding reliability evaluation models and methods will also change. In this paper, a method of reliability evaluation for distribution network considering the influence of distributed generation is proposed. Firstly, according to the different characteristics of distributed generation and traditional power supply. A power supply model suitable for reliability evaluation of distribution network with distributed generation is established. Then according to the importance of the load in the distribution network, taking the maximum equivalent payload as the objective function, the optimization model of island partition of distribution network with distributed generation is established. Depth first search and breadth first search are used to solve the problem. Combined with the islanding operation mode of distribution network, this paper improves the traditional method of minimum path in reliability evaluation, and makes it suitable for the reliability analysis and calculation of distribution network power supply with distributed generation. Through the simulation of IEEE-RBTS Bus6 system, the effectiveness of the proposed model and algorithm is illustrated. The results also show that the distributed power generation is connected to the distribution network reasonably. It can improve the power supply reliability of distribution network.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TM732

【引证文献】