WLAV state estimation for power system containing multitype FACTS devices

Abstract

This paper presents the state estimation of power system in which not only the bus voltages but also the states of the flexible AC transmission system (FACTS) are considered as the state variables. By using the rectangular form of state variables and equivalent measurement techniques, a linear measurement model with constraints of FACTS device is obtained. The predictor-corrector interior point method based on the weighted least absolute value criterion is developed for solving the optimization problem. Simulation results on the modified IEEE 14-bus and 118-bus test systems are provided. The numerical results indicate the effectiveness of the proposed approach.

A robust WLAV state estimation based on pseudo‐voltage measurements

“…The weighted least absolute value (WLAV)‐based state estimation (SE) has been shown to be a robust estimation method, which can suppress bad data and give the accurate estimated states when measurements have proper redundancy. However, the WLAV method requires high‐computation resources and it performs poorly when there are bad leverage measurements . A leverage measurement is located far away from the rest of the measurements in the factor space of linear regression analysis .…”