基于灵敏度分析的逐次追踪状态估计

对状态量、量测量以及功率估计量之间的灵敏度关系进行了分析，进而提出了基于灵敏度分析的逐次追踪状态估计。该方法用于变化量测触发方式，通过灵敏度分析的方法，在每一触发时刻仅对变化量测进行逐次处理。算例表明，此方法极大地压缩了每次状态估计的计算量，明显缩短了单次状态估计计算的时间，而且能够保证与WLS算法非常接近的高计算精度。

Sequential Tracking State Estimation Based on Sensitivity Analysis

The relations of sensitivity among state variables, measured and estimated values of voltage and power are analyzed, and then a sequential tracking stated estimation method based on sensitivity analysis is proposed. The proposed method is applied to changed measurement triggering mode (CNTM), by means of sensitivity analysis, at each triggering moment only the changed measured values are treated sequentially. Results of calculation examples show that the proposed method can extremely reduce the calculated amount of state estimation each time and the computing time for single state estimation are evidently saved, furthermore, with the proposed method high computation accuracy, which is very close to that by WLS algorithm, can be ensured.