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基于元件分级传递的配电网可靠性评估快速算法

DOI: 10.13334/j.0258-8013.pcsee.2014.S.008, PP. 54-60

Keywords: 配电网,可靠性评估,分级传递,备用电源,可靠性指标

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Abstract:

提出一种配电网可靠性评估算法以解决故障模式影响分析法等在系统急剧增大时所具有的计算冗余问题。可靠性指标逆流传递过程考虑了下游故障对上游负荷的停电影响,而顺流传递过程考虑了上游故障对下游负荷的停电影响。在逆流传递过程中,先将支线的可靠性指标传递到馈线上,再从馈线末端开始传递至上一级馈线中。在顺流传递中,通过保护元件的逐级传递,将不同保护元件的操作时间计入可靠性指标当中。结合此2种等值过程得到系统中每一点的可靠性指标。该算法考虑保护元件的不可靠动作率,实现了可靠性指标的全网络传递。并利用区域等值技术和最小路方法以简化传递路径和有效减少计算量。所提出方法在IEEE标准可靠性测试模型RTBS上完成测试。结果表明,提出方法的可靠性计算结果与故障模式影响分析法完全相同,并能最大化地提高计算效率。

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