Distributed Optimal Frequency Control for Integrated Energy Systems with Electricity and Heat

TL;DR

This paper introduces a fully distributed frequency control method for integrated energy systems with electricity and heat, ensuring optimality, stability, and robustness amidst increasing distributed energy resources.

Contribution

It presents a novel distributed control approach that guarantees optimal frequency regulation and stability in coupled electricity and heat energy systems.

Findings

The control method achieves optimal frequency regulation.

The system maintains global asymptotic stability.

Robustness against coefficient inaccuracies is demonstrated.

Abstract

With more and more distributed energy resources (DERs) deployed in Integrated Energy Systems (IESs), frequency stability challenges the pursuit of reliability and efficiency. This paper proposes a fully-distributed frequency control method for load-side DERs, in which the optimality can be guaranteed in an IES where electricity and heat are coupled. Moreover, the global asymptotic stability of the closed-loop system is proved and the robustness with respect to inaccurate coefficients is shown. Case studies demonstrate the effectiveness of proposed method.