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确定考虑切机、切负荷及直流功率升降等的交直流紧急控制策略,是电力系统分析控制的难点。提出了基于动态鞍点(DSP)暂态动能灵敏度分析的紧急控制方法。以各控制措施对DSP处暂态动能改善与各机组参与因子加权指标选择搜索方向,跟踪分群模式和参与因子的变化,搜索交直流协调的紧急控制策略。基于“三华”联网和南网数据的实例分析表明,该方法实用有效。
It is difficult to analyze and control the power system to determine the AC-DC emergency control strategy considering cutting machine, cutting load and DC power. An emergency control method based on transient sensitivity analysis of dynamic saddle point (DSP) was proposed. With each control measure, we select the search direction for the improvement of transient kinetic energy of DSP and the weighted index of participation factors of each unit, track the change of grouping mode and participation factor, and search for the emergency control strategy of AC-DC coordination. The example analysis based on the data of “Sanhua” and Nanwang shows that this method is practical and effective.