计及不对称故障和重合闸操作的EEAC法直接暂态稳定分析

EEAC BASED DIRECT TRANSIENT STABILITY ANALYSIS INCLUDING THE MODELS OF UNSYMMETRICAL FAULTS AND AUTOMATIC RECLOSING

本文将EEAC法推广到计及不对称故障和重合闸操作的暂稳分析中。为修正计算转子角轨迹所引起的高阶截断误差,本文提出了多步Taylor展开计算的改进算法,该算法避免了计算现有EEAC法中的修正因子,适用于任意故障过程,并可提高EEAC暂稳分析的精度及可靠性。两个实际系统的仿真计算结果表明本文改进和推广的EEAC法具有良好的精度和实用前景。

The EEAC method is extended in this paper, so as to include the models of unsymmetrical faults and automatic reclosing. An improved multi-step Taylor series expansion algorithm is proposed to decrease the truncation errors, which avoids pre-determing the two corrective factors in the original EEAC. The numerical simulation results of two power systems confirm that the proposed method is of good accuracy and fine application prospect.