# Coherency and Online Signal Selection Based Wide Area Control of Wind Integrated Power Grid

## TL;DR

This paper presents a real-time wide area control method for wind-integrated power grids that uses online coherency grouping and signal selection to improve damping of interarea oscillations.

## Contribution

It introduces a novel WAC design combining Kalman filtering and residue-based signal selection for real-time adaptation in wind power systems.

## Key findings

- Effective damping of interarea oscillations demonstrated
- Online coherency grouping improves control accuracy
- Method outperforms traditional local and offline WAC approaches

## Abstract

This paper introduces a novel method of designing wide area control (WAC) based on a discrete linear quadratic regulator and Kalman filtering based state-estimation that can be applied for real-time damping of interarea oscillations of wind integrated power grid. The main advantages of the proposed method are that the architecture provides online coherency grouping that properly characterizes real-time changes in the power grid and online wide-area signal selection based on residue method for proper selection of the WAC signals. The proposed architecture can, thus, accurately monitors changes in the power grid and select the appropriate control signal for more effectively damping the interarea oscillation when compared to the conventional local signal based power system stabilizers or offline based WAC designs. The architecture is tested on a wind integrated two-area system and the IEEE 39 bus system in order to show the capability of the proposed method.