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电力系统紧急情况下的动态分区和自主解列策略

, PP. 224-229

Keywords: 紧急控制,慢同调,系统解列,分区策略,割集

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Abstract:

在电力系统第三道防线的紧急控制中,当系统发生严重级联事故时,为保持系统稳定运行,自主解列控制是最后的有效手段。它的目标是保持各子分区的稳定性,并使整个系统在故障后的负荷总损失最小。本文讨论了电力系统紧急控制中的动态二分区和自主解列策略,首先结合发电机的慢同调分群算法,确定了系统的最优慢同调分群数,将振荡模式相近的发电机组等效为虚拟的发电机节点,然后在Laplace分区策略的基础上,提出新的加权指标,对Laplace分区策略进行改进,并提出启发式邻域搜索分区方法。最后将启发式就近削负荷方法应用于所有这些可能的割集,并计算各分区的负荷削减量,得到系统故障后总负荷损失最小的割集,即最佳解列控制策略。在IEEE118系统上的应用验证了改进的权重指标和所提出的混合分区策略的有效性。

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