考虑输电网与柔性互联配电网交互影响的可靠性评估方法
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TM76

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国网江苏省电力有限公司科技项目(J2022083),配网高效紧凑柔性互联关键技术研究


Analytical evaluation method of reliability considering interaction between transmission network and flexible interconnected distribution network
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    摘要:

    对输电网与柔性互联配电网组成的输配电网络整体采用故障枚举法进行可靠性评估时,除去分析输电网与配电网内部故障对各自供电可靠性的影响之外,还须考虑故障场景下输电网与配电网间的交互影响。文中在现有输电网与配电网各自独立的可靠性评估方法基础上,提出针对输配电网络整体的可靠性评估方法。所提方法可计及故障条件下输电网与配电网运行状态间的相互关联,将输电网故障后的节点负荷减载细化为配电网优化后的负荷切除方案,提升输电网可靠性评估结果精度,并将应对输电网故障导致的配电网负荷损失纳入配电网可靠性评估。此外,在输电网可靠性评估中计及了配电网内部故障导致的输电网节点供电负荷损失及其对输电网运行可靠性造成的影响。针对输配电网络整体,基于故障枚举采用解析法计算得到输配电网络可靠性指标,算例分析结果验证了所建立可靠性评估模型的有效性。

    Abstract:

    When applying the fault enumeration method to evaluate the reliability of the whole transmission and distribution network composed of transmission network and flexible interconnected distribution network,apart from analyzing the influence of internal faults of the transmission network and distribution network on their respective power supply reliability,the interaction between the transmission network and distribution network should also be considered under the fault scenario. Based on existing independent reliability evaluation algorithms for the transmission network and distribution network,the reliability evaluation method for the whole transmission and distribution network is proposed in this paper. The proposed method in this paper can account for the interrelation between the operation states of the transmission network and the distribution network under the fault condition. The node load reduction after the failure of the transmission network is refined into the optimized load cutting scheme of the distribution network. While improving the accuracy of the reliability evaluation results of the transmission network,the load loss of the distribution network caused by the failure of the transmission network is included in the reliability evaluation of the distribution network. In addition,the load loss caused by internal faults of the distribution network and its influence on the reliability of the transmission network are included in the reliability evaluation of the transmission network. For the whole transmission and distribution network,the reliability index of the transmission and distribution network is calculated by the analytical method based on fault enumeration. The validity of the reliability evaluation model is verified by the results of the numerical analysis.

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史明明,刘瑞煌,张宸宇,朱卫平,葛雪峰.考虑输电网与柔性互联配电网交互影响的可靠性评估方法[J].电力工程技术,2024,43(4):77-87

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  • 收稿日期:2023-12-22
  • 最后修改日期:2024-03-05
  • 录用日期:2023-04-13
  • 在线发布日期: 2024-07-23
  • 出版日期: 2024-07-28
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