Multi-area distributed three-phase state estimation for unbalanced active distribution networks

作者：Chen, Sheng; Wei, Zhinong^*; Sun, Guoqiang; Lu, Ning; Sun, Yonghui; Zhu, Ying

来源：Journal of Modern Power Systems and Clean Energy, 2017, 5(5): 767-776.

DOI：10.1007/s40565-016-0237-0

• Active distribution networks (ADNs)
• Distributed three-phase state estimation
• Three-phase distributed generator (DG) models
• Pseudo-measurements
• Augmented Lagrangian

This paper proposes a new multi-area framework for unbalanced active distribution network (ADN) state estimation. Firstly, an innovative three-phase distributed generator (DG) model is presented to take the asymmetric characteristics of DG three-phase outputs into consideration. Then a feasible method to set pseudo -measurements for unmonitored DGs is introduced. The states of DGs, together with the states of alternating current (AC) buses in ADNs, were estimated by using the weighted least squares (WLS) method. After that, the ADN was divided into several independent subareas. Based on the augmented Lagrangian method, this work proposes a fully distributed three-phase state estimator for the multi-area ADN. Finally, from the simulation results on the modified IEEE 123-bus system, the effectiveness and applicability of the proposed methodology have been investigated and discussed.

• 出版日期2017-9
• 单位河海大学