电力系统抗差状态估计研究

摘要

State estimation can efficiently estimate the optimum operation of power systems. Several simulated tests are carried out in order to compare three state estimators-WLAV (Weighted Least Absolute Value) which solved by PDIPM (Primal-Dual Interior Point Method)、QL(Quartic linear)、WLS(Weighted Least Square, WLS) both on estimated accuracy and computational efficiency. According to the simulated results, WLS has a high computational efficiency, but with a poor estimated accuracy. However, the estimated accuracy of WLAV outperforms the other two estimators but meanwhile its low computational efficiency restricts its application in the industry.%状态估计能高效地估计出电力系统最佳的运行状态。测试并比较了基于原对偶内点法的加权最小绝对值估计与基于牛顿法求解的二次-线性准则、加权最小二乘估计的估计精度与计算效率，由测试结果可知，加权最小二乘估计虽有较高的计算效率，但估计精度偏差，而加权最小绝对值估计有着较高的估计精度，但较低的计算效率也限制了其工程应用。