A new dynamic state estimation approach including hard limits on control devices

Claudio R. Fuerte-Esquivel, Omar Romay, Ricardo Martinez-Parrales, Enrique Acha, Enrique A. Zamora-Cardenas

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This paper puts forward a comprehensive formulation for the wide area dynamic state estimation of power systems. This is a problem of great current interest in the power systems community, where significant progress has been achieved in recent years. This proposal builds on the existing work and formulates a novel approach to estimate dynamic and algebraic state variables of the entire power system in a simultaneous solution method. In contrast to existing formulations, the proposed approach simultaneously co-estimates the transient evolution of the transmission grids nodal voltages and the dynamic states associated with synchronous machines and their associated controllers. Since controllers with hard limits are always present in a power system, the proposal also estimates when and how hard limits constrain the time evolution of the power system operating state. In this case, constrained dynamic variables associated with non-windup and windup limiters are automatically handled in the estimation process by transforming the inequality constraints of hard limits into equality constraints using the complementarity theory and the Fischer-Burmeister merit function. The feasibility of the proposed method is demonstrated on the WSCC 9-bus power system and the Mexican 190-bus power system.

Original languageEnglish
JournalIEEE Transactions on Power Systems
DOIs
Publication statusE-pub ahead of print - 2022
Publication typeA1 Journal article-refereed

Keywords

  • Dynamic state estimation
  • hard limits
  • inequality constraints
  • Kalman filters
  • Mathematical models
  • Phasor measurement units
  • Power system dynamics
  • Proposals
  • State estimation
  • wide area monitoring
  • Windup

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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