Design and Evaluation of Distributed Networked Control for a Dual-Machine Power System

TL;DR

This paper proposes a distributed networked control scheme for dual-machine power systems that accounts for communication delays, aiming to reduce swing oscillations and improve transient performance in power grids.

Contribution

It introduces a realistic modeling approach for networked control with delays and sampling, enabling precise evaluation and comparison with decentralized control methods.

Findings

Effective damping of oscillations in dual-machine systems

Enhanced accuracy in modeling networked control with delays

Improved transient stability in power systems

Abstract

Oscillations between swing modes of electric machines is an important limitation in achieving a high level of transient performance and reliability in power grids. Based on the new advances in measurement and transmission of wide-area information, this work proposes a distributed networked control scheme by considering the communication delays. The results are applied to reduce the inter-area swing oscillations in a power grid. In comparison with the previous works, we provide a more realistic modeling of the resulting networked control system with data sampling and delays. The exactness of the proposed modeling allows for precise evaluation and comparison between the distributed and decentralized schema. A symmetric a dual machine power system is highly oscillatory and we focus on this case to evaluate the ability of the proposed control design in dampening of the oscillations. The design can be done either based on optimization of a quadratic cost function or a disturbance attenuation level