| 引用本文: | 刘 健,韩 磊,张志华.面向用户并考虑紧迫性的配电网运行风险评估[J].电力自动化设备,2015,35(2): |
| LIU Jian,HAN Lei,ZHANG Zhihua.Customer-oriented distribution network operational risk assessment considering urgency[J].Electric Power Automation Equipment,2015,35(2): |
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| 摘要: |
| 为了对运行中配电用户的风险及其紧迫性进行评估，提出了一种面向用户的配电网运行风险评估方法。该方法将用户作为评估对象，通过对运行中的配电网模拟预想故障下的负荷转移，分析用户所受故障损失，定义了考虑负荷不确定性的用户期望停电概率风险指标、用户期望停电时间风险指标、用户期望电量损失风险指标，并且通过结合系统期望停电用户数风险指标体现预想故障对系统整体的影响。为反映过负荷的影响，定义了配电网过负荷风险指标。基于预防控制执行时间与风险来临时间的比较，建立了风险紧迫性等级，用以反映确保预防控制措施能够有效实施的时机。采用IEEE 3馈线配电系统对所提方法进行了详细说明，结果表明其是可行和有效的。 |
| 关键词: 配电 配电自动化 风险评估 紧迫性 面向用户 风险指标 不确定性分析 预防控制 |
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| Customer-oriented distribution network operational risk assessment considering urgency |
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LIU Jian1, HAN Lei2, ZHANG Zhihua1
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1.Shannxi Electric Power Research Institute，Xi’an 710054，China;2.School of Electrical and Control Engineering，Xi’an University of Science & Technology，Xi’an 710054，China
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| Abstract: |
| A customer-oriented method for assessing the operational risk of distribution network and its urgency is proposed，which takes customers as the assessment objects and analyzes the loss of customer by simulating the load transfer in operating distribution network with anticipated fault. Different risk indexes considering load uncertainty are defined，such as customer expected outage probability，customer expected outage duration and customer expected electricity loss，which are combined with the risk index of system expected outage customer number to indicate the influence of anticipated fault on whole system. A risk index of overload is defined to reflect the influence of overload. Based on the comparison between the preventive control execution time and the risk coming time，the urgency level of risk indicates the opportunity to effectively execute the preventive control. The proposed method is illustrated with IEEE 3-feeder distribution network as an example，verifying it feasible and effective. |
| Key words: electric power distribution distribution automation risk assessment urgency customer-oriented risk index uncertainty analysis preventive control |
