考虑继电保护协调动作的分布式电源优化布置

发布时间：2018-04-10 17:01

本文选题：分布式电源 + 配电网　；参考：《西华大学》2014年硕士论文

【摘要】：随着全球能源危机和环境要求的迫切需求，分布式发电以其高效、可靠、经济与环境友好等优势成为新能源开发的典范得到了广泛关注。分布式发电技术的发展使得分布式电源的接入成为了可能。分布式电源通常接入配电网，但是多个分布式电源接入配电网将会使配电网的结构、潮流以及运行方式发生很大的变化。特别是在继电保护方面，多个分布式电源并入配电网，，使得配电网的故障短路电流的大小、方向和分布发生深刻的变化，配电网中原有三段式电流保护的协调配合关系可能被打破。本文首先介绍了配电网常用的三段式电流保护及其整定原则，在此基础上搭建典型配电网模型，并根据保护配置计算出支路各个保护的整定值，然后分析了单个及多个分布式电源的接入位置和容量对三段式电流保护运行造成的影响。针对分布式电源接入对配电网电流保护配合的影响，提出了考虑继电保护协调可靠动作的以分布式电源准入容量最大为目标的优化布置模型，并给出了基于遗传算法的优化布置模型求解方法。最后，文章以IEEE33单条馈线多分支配电网和IEEE14多条馈线多分支配电网模型作为算例求解验证分布式电源的优化布置，结果表明：该优化布置模型是可行的、合理的。本文提出的分布式电源在配电网的优化布置模型在最大限度的利用分布式电源提供了接入参考依据，具有重要的理论和实际意义。
[Abstract]:With the global energy crisis and the urgent need of environmental requirements, distributed power generation has become a model of new energy development because of its high efficiency, reliability, economic and environmental friendliness.With the development of distributed generation technology, it is possible to access distributed generation.Distributed generation is usually connected to the distribution network, but the structure, power flow and operation mode of the distribution network will be greatly changed by multiple distributed sources.In particular, in the area of relay protection, many distributed sources are incorporated into the distribution network, resulting in profound changes in the size, direction and distribution of the fault short-circuit current in the distribution network.The coordination relationship of the original three-section current protection in the distribution network may be broken.This paper first introduces the three-section current protection and its setting principle, and then builds a typical distribution network model, and calculates the setting value of each branch protection according to the protection configuration.Then, the influence of access location and capacity of single or multiple distributed power sources on the operation of three-stage current protection is analyzed.In view of the influence of distributed power access on the coordination of current protection in distribution network, an optimal layout model with maximum admission capacity of distributed power supply is proposed, which considers the coordinated and reliable operation of relay protection.The method of solving the optimal layout model based on genetic algorithm is also presented.Finally, the IEEE33 single-feeder multi-branch distribution network and the IEEE14 multi-feeder multi-branch distribution network model are used as examples to verify the optimal layout of distributed generation. The results show that the optimal layout model is feasible and reasonable.The optimal layout model of distributed generation in distribution network proposed in this paper provides a reference for the maximum use of distributed power supply, which has important theoretical and practical significance.
【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM77

【共引文献】