大规模复杂中压配电网设备可靠性参数的精确建模及应用

Accurate Modeling and Application of Equipment Reliability Parameters for Large-Scale Complex Distribution Network

为了准确刻画设备所在区域、故障责任原因、可用修复资源等因素对设备可靠性参数的影响,本文提出了一种配电网设备可靠性参数的精确建模方法。首先,根据故障停电责任原因对历史数据进行分类,制定各停电责任原因的精细化建模标准,建立配网设备的故障率精确模型;其次,根据电网运营方实际采用的故障修复工作流程建立配网设备的修复时间精确模型;最后,基于获得的设备可靠性参数采用中压配网可靠性评估分块算法进行可靠性评估。以某地区实际配电网为算例进行分析。结果表明:相较于传统的平均可靠性参数模型,所提可靠性参数精确模型可以根据设备特征获得特定的可靠性参数;配网可靠性评估结果与系统实际可靠性水平更加吻合,对配网的薄弱环节辨识具有更高的现实指导意义。

In order to accurately capture the impact factors of the equipment reliability parameters,such as geographical region,outage liability reasons,and available repair resources,an accurate model of reliability parameters is proposed for equipment of distribution network in this paper.Firstly,with the historical data categorized according to the outage liability reasons and the proposed refined modeling standards,an accurate failure rate model of equipment is established.Then,according to the actual workflow of fault repair adopted by the grid operator,an accurate repair time model of distribution network equipment is established.Finally,the reliability assessment of medium-voltage distribution network is performed with the reliability parameter model and the the block algorithm.Case studies on an actual distribution network show that compared with the traditional parameter model,the proposed parameter model can obtain specific reliability parameters according to the characteristics of the equipment.The results of reliability evaluation of distribution network are more consistent with the statistical level of system reliability,and have higher reference value for the identification of critical components.