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A robust WLAV state estimation based on pseudo‐voltage measurements
Author(s) -
Rakpenthai Chawasak,
Uatrongjit Sermsak
Publication year - 2020
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23127
Subject(s) - synchronizing , robustness (evolution) , phasor , voltage , electric power system , interior point method , control theory (sociology) , units of measurement , phasor measurement unit , nonlinear system , leverage (statistics) , measurement uncertainty , computer science , algorithm , mathematical optimization , engineering , mathematics , power (physics) , electrical engineering , statistics , topology (electrical circuits) , biochemistry , chemistry , physics , control (management) , quantum mechanics , artificial intelligence , machine learning , gene
This paper presents a robust state estimation (SE) based on weighted least absolute value (WLAV) criterion for power systems having both traditional remote terminal units (RTU) and synchronizing phasor measurement units (PMU). It is known that WLAV‐based SE performs poorly when bad data occurred in leverage measurements. To improve the robustness of WLAV‐based SE, a technique for converting actual measurements to pseudo‐voltage measurements is proposed in this paper. Using these pseudo‐voltage measurements, a measurement model containing no leveraging measurement point can be formulated. The SE problem is formulated as a constrained nonlinear optimization based on WLAV criterion and solved by using a primal‐dual interior point algorithm. Several IEEE test systems with mixed measurements have been used to demonstrate the robustness of the proposed method. The results indicate that the proposed method yields superior SE accuracy even under extremely bad data conditions. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.