一种基于贪心算法的紧急控制策略优化搜索方法

间歇式能源接入、全国电网互联、在线运行保护与控制需求等多重因素对电网紧急控制策略搜索提出了新的要求。为此提出了一种基于贪心算法的紧急控制策略优化搜索方法。该方法选择预想故障集中某一失稳算例进行时域仿真，再根据EEAC量化理论计算每个紧急控制措施性能指标，基于性能指标计算出紧急控制空间中各紧急控制措施性价比，其关键在于计算出采取紧急控制措施前后系统暂态稳定裕度的变化量。然后采用贪心算法在候选紧急控制空间搜索出紧急控制策略。最后通过简单电力系统和实际电网两个算例验证了该方法的正确性。

A fast method of searching optimal emergency control strategy based on greedy algorithm

It puts forward new requirements to strategy searching of emergency control considering multiple factors, such as intermittent energy access, the interconnection of national power grid, and requirement of operation protection and control online operation. This paper proposes an optimal searching method of the emergency control strategy based on greedy algorithm. This method does time-domain simulation by choosing a certain instability case of the expected fault set and calculates performance index of each emergency control measure based on the theory of quantitative analysis of EEAC, based on which calculates the price ratio of each emergency control measure in emergency control space. The key is to calculate variable quantity of transient stability margin before and after taking emergency control measures. Then it searches out the optimal emergency control strategy in candidate emergency control space through greedy algorithm. Finally, the correctness of the proposed method is verified by a simple power system and a real power grid.