含分布式电源的配电网停电风险快速评估

发布时间：2019-02-18 14:43

【摘要】：大量分布式电源(distributed generation,DG)接入配电网导致系统元件数量的增加和系统状态数目的增大,为停电风险评估在含DG配电网中的实施带来困难。为此,提出一种基于设备随机故障的含DG配电网停电风险快速评估方法。为加快评估速度,在系统状态抽样环节引入拉丁超立方抽样技术(Latin hypercube sampling,LHS),通过对配电网各系统变量实施分区、抽样、排序的方式得到用于停电风险评估的系统状态;通过定义负荷点的贡献度与消耗度2个孤岛划分参量,削弱了孤岛划分算法中负荷点接线结构对算法快速性的影响,进而提出了能同时满足快速性和精确性要求的孤岛划分方法。从充裕性角度建立了配电网停电风险的指标体系,并制定了相应的风险评价标准。算例结果表明,提出的快速评估方法能反映含DG配电网的停电风险程度,可为电网规划及运行人员提供参考。
[Abstract]:A large number of distributed generation (distributed generation,DG) access to the distribution network leads to an increase in the number of system components and the number of system states, which makes it difficult to implement blackout risk assessment in distribution networks with DG. For this reason, a fast assessment method of power outage risk including DG distribution network based on random fault of equipment is proposed. In order to speed up the evaluation, the Latin hypercube sampling (Latin hypercube sampling,LHS) is introduced in the system state sampling, and the system state for the blackout risk assessment is obtained by dividing, sampling and sorting the system variables in the distribution network. By defining two islanding parameters, the contribution and consumption of load points, the influence of load point connection structure on the algorithm's rapidity is weakened. Furthermore, an island partition method is proposed, which can satisfy both the requirement of rapidity and accuracy. The index system of distribution network blackout risk is established from the point of view of adequacy, and the corresponding risk evaluation standard is established. The results show that the proposed method can reflect the blackout risk of DG distribution network and can be used as a reference for power network planning and operation.
【作者单位】：输配电装备及系统安全与新技术国家重点实验室(重庆大学);
【基金】：国家重点基础研究发展计划(973计划)(2012CB215205) 国家创新研究群体基金(51021005)~~
【分类号】：TM732

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