Communication Reduction for Power Systems: An Observer-Based Event-Triggered Approach

TL;DR

This paper introduces an observer-based event-triggered control scheme for power systems that reduces communication load by nearly 40% while maintaining system stability and performance.

Contribution

It proposes a novel event detection mechanism using Luenberger observers and a linear quadratic regulator to minimize data transmission in power grid control.

Findings

Reduced data transmission by 39.8% in simulations.

Maintained system stability within pre-specified bounds.

Enhanced reliability of power grid control through communication reduction.

Abstract

The management of distributed and heterogeneous modern power networks necessitates the deployment of communication links, often characterized by limited bandwidth. This paper presents an event detection mechanism that significantly reduces the volume of data transmission to perform necessary control actions, using a scalable scheme that enhances the stability and reliability of power grids. The approach relies on implementing a linear quadratic regulator and the execution of a pair of Luenberger observers. The linear quadratic regulator minimizes the amount of energy required to achieve the control actions. Meanwhile, the Luenberger observers estimate the unmeasured states from the sensed states, providing the necessary information to trigger the event detection mechanism. The effectiveness of the method is tested via time-domain simulations on the IEEE 13-node test feeder interfaced with inverter-based distributed generation systems and the proposed observed-based event-triggered controller. The results demonstrate that the presented control scheme guarantees the bounding of the system states to a pre-specified limit while reducing the number of data packet transmissions by 39.8%.