Parallel Perturbed Gauss-Newton State Estimator Based on Fortescue Transformation for Unbalanced Power Systems  

作　　者：Izudin Džafić 

机构地区：[1]Faculty of Electrical Engineering,University of Sarajevo,Sarajevo 71000,Bosnia and Herzegovina

出　　处：《Journal of Modern Power Systems and Clean Energy》2022年第6期1778-1783,共6页现代电力系统与清洁能源学报（英文）

基　　金：supported by MONKS,Sarajevo,FBiH,Bosnia and Herzegovina(No.27-02-11-41250-34/21).

摘　　要：This letter extends the complex-variable perturbed Gauss-Newton method to estimate the state of unbalanced power systems by exploiting the Fortescue transformation.It proposes a novel and efficient graph-based way to deal with singularities due to zero-sequence network parts bounded with delta transformer windings and isolated from the ground.The estimator can handle both phasor and complex power measurements.Compared with the standard complex-variable unbalanced state estimator,it achieves better numerical stability and a speed-up of around three times using a sequential implementation and five times using parallel execution.

关 键 词：Delta-windings Fortescue transformation iterative algorithms least-squares approximation parallel algorithm perturbation methods ILL-CONDITIONING state estimation symmetrical components 

分 类 号：TM73[电气工程—电力系统及自动化]