注入空间中电压安全域最短半径的估计

基于电压稳定量化指标对节点注入的灵敏度提出了一种估计注入空间中电压安全域最短半径的启发式方法，该方法以一定的步长逐步逼近注入空间中电压安全域的最近边界，可以考虑各种系统运行参数的约束，不存在数值收敛性问题。原理上，这种方法的基本思想也可用于估计注入空间中暂态安全域的最近边界及小干扰安全域的最近边界，提供了一种可以估计各种安全域最近边界的统一数值途径。数值仿真表明，该方法是正确、有效的。

Estimation of the Shortest Radius of Power System Voltage Security Region in Node Injection Space

Based on the sensitivities of the voltage stability index to node injections, a heuristic method for estimating the shortest radius of power system voltage security region in node injection space is proposed. In the proposed method, the closest boundary of voltage security region in node injection space is approached step by step. The proposed approach can consider all kinds of operating constraints, and has no numerical convergence problems. Moreover, the basic principle of this method can also be extended to estimate the shortest radius of transient security region and small signal security region, which provides a uniform numerical approach to estimate all kinds of power system security regions. Numerical results demonstrate that the proposed method is valid and effective.