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基于主从问题的电力系统最优主动解列

DOI: 10.13334/j.0258-8013.pcsee.2014.04.009, PP. 578-586

Keywords: 电力系统,主动解列,图背包问题,主从问题,最优潮流

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Abstract:

系统主动解列的完整模型为大规模非线性混合整数规划问题,大多采取完全分解方法,因而只能求得近似解,针对此问题提出了基于主从问题交替求解电力系统最优主动解列断面的新策略,从而求得更优解。该策略基于图背包理论(connectedgraphconstrainedknapsackproblem,CGKP)将完整主动解列模型转化为主从问题;主问题为图的最优平衡分割问题,采用CGKP技术进行求解;从问题为基于直流最优潮流(optimalpowerflow,OPF)的调度问题,采用OPF技术进行求解;主从问题之间通过节点负荷的调节量实现耦合。通过主从问题之间的交替迭代获得更优的解列方案,同时也使得解列方案更接近于完整模型的最优解。算例分析表明,该算法相对于其他近似求解策略,所获得的解列方案可使系统总切机切负荷量更少,从而证明了该方法的有效性和可行性。

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