Optimal Distributed Voltage Control via Primal Dual Gradient Dynamics

TL;DR

This paper introduces a primal-dual gradient dynamics method for distributed voltage control in power networks, optimizing reactive power outputs to maintain voltage stability amid load changes and faults.

Contribution

It presents a novel distributed control approach based on primal-dual gradient dynamics for voltage regulation considering inverter variability and network constraints.

Findings

Effective voltage regulation demonstrated on IEEE test systems.

The method maintains voltage profiles under load variations and faults.

Proven to optimize reactive power outputs efficiently.

Abstract

The rapidly increasing penetration of inverter-based resources into a power transmission network requires more sophisticated voltage control strategies considering their inherent output variabilities. In addition, faults and load variations affect the voltage profile over the power network. This paper proposes a Primal Dual Gradient Dynamics based optimal distributed voltage control approach that optimizes outputs of distributed reactive power sources to maintain an acceptable voltage profile while preserving operational limits. Case studies of this new approach on IEEE test systems have verified its effectiveness.