【摘要】 提出了一种基于暂态能量裕度灵敏度的含有暂态稳定约束的优化潮流算法。它用时域仿真法对系统进行暂态稳定分析,提前滤除不失稳故障,并结合混合法计算失稳故障的能量裕度。依据最严重故障的能量裕度与发电机有功出力变化量的近似线性关系及能量裕度对发电机有功出力的灵敏度来调整发电机的有功出力。在计算程序中充分运用变步长搜索策略提高了计算效率,对考虑多个预想故障的含有暂态稳定约束的优化潮流问题具有良好的全局收敛性。最后通过IEEE30节点系统和IEEE57节点系统验证了该方法的有效性。更多还原

【Abstract】 A transient energy margin sensitivity based transient stability constrained optimal power flow (SOPF) algorithm is proposed. In this algorithm the transient stability of power system is analyzed by time domain simulation and the faults that can not make the system unstable are filtered in advance, and the transient energy margin of the faults that cause the system to be unstable are calculated by hybrid method. According to the approximate linear relation between the transient energy margin of the severest fault and the variation of generators’ active outputs and sensitivity of transient energy margin to generators’ active outputs, the active outputs of generators are adjusted. In the computation process the calculation efficiency is improved by fully utilizing variable step length search strategy, and good global convergence is ensured for SOPF problem considering multi predicted faults. Finally the effectiveness of the proposed algorithm is verified by the calculation results of IEEE 30-bus system and IEEE 57-bus system.更多还原