基于负荷电流的配电网非量测负荷估计

提出了一种基于负荷电流的抗差估计算法用于修正10kv配电网非量测负荷。该算法将配电网中的功率量测变换为电流量测，实现了雅可比矩阵常数化，负荷电流实虚部解耦求解。并采用了权值随残差变化的权函数，从而较大程度上抑制了伪量测中坏数据对估计结果的不良影响。文中还给出了IEEE33节点配电系统的计算结果。结果表明，该算法能够有效地修正伪量测数据，使其准确度达到或接近实际量测值的准确度。

A LOAD-CURRENT-BASED STATE ESTIMATION FOR DISTRIBUTION SYSTEMS NON-MEASUREMENT LOADS

A load-current-based robust estimation method is proposed for revising pseudo measurements of 10 kV distribution systems. Power measurements are all transformed to equivalent current measurement that makes the Jacobian matrix constant and calculates current real and imaginary part dividually. Weighting functions of residuals are adopted in the algorithm, so that it can restrain bad influences from bad data of pseudo measurements. The results of 33-bus IEEE test system show that the algorithm can efficiently revise pseudo-measurement data and can make the accuracy of pseudo measurements reach or approach that of real measurements.