基于蒙特卡罗方法的大型电力用户电压暂降评估

为评估和解决用户节点的电压暂降问题，采用蒙特卡罗随机模拟方法对节点电压暂降进行评估，在不同的线路故障概率模型下，运用HyperSIM仿真工具计算和分析故障对用户节点电压暂降的影响程度，判断电网的薄弱环节，从而为电网改造和确定缓解装置的安装位置提供思路。通过对实际电力系统进行仿真，计算得到了负荷节点电压暂降幅值的期望值，找到了对负荷节点电压影响最大的环节，为进行电网规划调度提供了参考。

Assessment of Voltage Sags in Large Power Consumer Based on Monte Carlo Method

To assess and solve the voltage sag at user node, an approach of using Monte Carlo stochastic simulation method to evaluate the nodal voltage sag is proposed. The HyperSIM simulation tool is adopted to calculate and analyze the impacting degree of fault on voltage sag at user node under different probability models to decide the weak links of power network and thereby to offer thinking for both power network renovation and determination of installation position for the devices to remedy voltage sag. By means of the simulation of actual power system, the expected value of the magnitude of voltage sag at user node is obtained by calculation and the link that has the utmost impact on the voltage at user node is found. The proposed approach is available for reference in power network planning and scheduling.