Robust Power System State Estimation Method Based on Generalized M-Estimation of Optimized Parameters Based on Sampling

Yu Shi, Yueting Hou, Yue Yu, Zhaoyang Jin () and Mohamed A. Mohamed
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Yu Shi: Department of Science, Shandong Jiaotong University, Jinan 250353, China
Yueting Hou: Department of Electrical Engineering, Shandong University, Jinan 250100, China
Yue Yu: Department of Electrical Engineering, Shandong University, Jinan 250100, China
Zhaoyang Jin: Department of Electrical Engineering, Shandong University, Jinan 250100, China
Mohamed A. Mohamed: Department of Electrical Engineering, Faculty of Engineering, Minia University, Minia 61519, Egypt

Sustainability, 2023, vol. 15, issue 3, 1-18

Abstract: Robustness is an important performance index of power system state estimation, which is defined as the estimator’s capability to resist the interference. However, improving the robustness of state estimation often reduces the estimation accuracy. To solve this problem, this paper proposes a power system state estimation method for generalized M-estimation of optimized parameters based on sampling. Compared with the traditional robust state estimator, the generalized M-estimator based on projection statistics improves the robustness of state estimation, and the proposed optimized parameter determination method improves the overall accuracy of state estimation by appropriately adjusting its robustness. Considering different degrees of non-Gaussian distributed measurement noises and bad data, the estimation accuracy the proposed method is demonstrated to be up to 23% higher than the traditional generalized M-estimator through MATLAB simulations in IEEE 14, 118 bus test systems, and Polish 2736 bus system.

Keywords: Gaussian distribution; M-estimator; power system state estimation; precision; robustness; weighted least square method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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