基于半张量理论的电力系统稳定域边界逼近(二)应用

电力系统稳定域边界的逼近一直是应用能量函数方法分析电力系统暂态稳定的难点.采用能量函数方法所应用的电力系统数学模型,基于半张量理论所给出的电力系统稳定域边界逼近算法,文中分别对单机无穷大系统及IEEE 3机9节点标准测试系统的稳定域边界进行逼近,并依据近似的稳定域边界估计了临界切除时间.通过对近似稳定域边界的可视化及与传统的等能量函数曲线稳定域边界的对比,充分显示近似稳定域边界提高了直接法分析电力系统暂态稳定的精度.进一步指出了应用半张量方法逼近电力系统稳定域边界仍需深入研究的问题.

Approximation on the Boundary of Power System Stability Region Based on Semi-tensor Theory: Part Two Application

Approximating the boundary of attraction region is very important to the application of the energy function method. Starting from the mathematical model of power system applied in energy function methods, the stability boundaries of onemachine infinite-bus system and IEEE three-machine nine-bus test system are approximated by applying the semi-tensor based stability boundary approximation algorithm. The critical clearing time is calculated based on the approximated boundary. Compared with the traditional stability boundary in the energy function method, the approximation enhances the accuracy of the direct method on transient stability analysis. The efficiency of the semi tensor based stability boundary approximation algorithm is shown in the paper. The problems hindering the application of semi-tensor theory on large-scale power system are also pointed out in the paper.