基于用户实时用电需求的配电系统停电事故严重性判别及用户感知可靠性评估

Distribution System Power Outage Severity Judgment and User-aware Reliability Assessment Based on User Real-time Power Demand

可靠性评估对于配电网规划建设具有重要意义。传统配电网可靠性主要从系统侧供电的角度进行评估,较少从用户角度考虑停电发生时用户侧的实时用能需求,忽视了不同用户对于同一停电事件严重性的差异化感知,造成了传统指标不能完全准确反映停电事件对于不同用户在不同时段的差异化影响。为此,首先引入用户感知可靠性的概念,提出了用户对停电事故严重性感知的量化分析方法;然后从用户侧和系统侧提出了一系列基于用户感知的配电网可靠性评估指标,构建了相应指标体系,并与传统指标体系进行了对比;最后运用IEEE-RBTS标准算例对提出的方法、指标进行了计算验证,证明了其可行性、有效性,以及相较于传统评估指标的优势。

Reliability assessment is of crucial importance for power systems planning and operation.Traditional reliability assessment methods mainly concern on analyzing power outages observed from the system side,regardless of whether end users are in need of consuming electricity during such outage events.Thus,it may not truly reflect the actual impacts of outages on the reliability level suffered from the consumer side.To overcome the deficiency,a user-aware reliability assessment method is proposed in this paper.The reliability level sensed by users is effectively assessed with respect to outage time and load curve of customers.A method is proposed to assess the severity of an outage based on the interruption time while also considering customer power consumption features.New metrics for assessing user-aware reliability are proposed to better reflect the impact of outage suffered and sensed from customer side.The IEEE-RBTS distribution system is studied to illustrate the effectiveness and efficiency of the proposed model,metrics,and method.