# Enhanced Modelling Framework for Equivalent Circuit-Based Power System State Estimation

## TL;DR

This paper introduces an enhanced equivalent circuit modeling framework for power system state estimation, improving the handling of various measurement types and null injections, and compares its performance with traditional methods.

## Contribution

It develops new circuit models for different measurement combinations, enabling comprehensive and flexible power system state estimation methods.

## Key findings

- Enhanced models improve estimation accuracy.
- The framework effectively handles null injections and unmeasured buses.
- Simulation results show competitive performance against traditional WLS methods.

## Abstract

The equivalent split-circuit formulation is a novel approach that has recently been applied to a range of power system related problems. As a result, a linear and a nonlinear method for power system state estimation with simultaneous treatment of the conventional and synchrophasor measurements have been proposed. In this paper, new circuit models are introduced for different combinations of conventional measurements, thus providing a complete modelling framework for these methods. Additionally, handling cases of null injections and buses with no measurements are included. Simulations are performed on several test systems in order to evaluate the performance of both methods with the enhanced modelling framework and to compare them to a hybrid constrained estimator based on the conventional WLS approach.