Oscillation energy based sensitivity analysis and control for multi-mode oscillation systems

TL;DR

This paper introduces an oscillation energy-based sensitivity analysis method for multi-mode oscillation systems, enabling more effective control and damping strategies by considering all modes simultaneously.

Contribution

It proposes a novel approach that accounts for multiple oscillation modes using energy sensitivity, improving control accuracy over traditional single-mode methods.

Findings

Effective damping control in IEEE 9-bus and 39-bus systems

Enhanced actuator and location selection for oscillation damping

Validation of the method through time domain simulations

Abstract

This paper describes a novel approach to analyze and control systems with multi-mode oscillation problems. Traditional single dominant mode analysis fails to provide effective control actions when several modes have similar low damping ratios. This work addresses this problem by considering all modes in the formulation of the system kinetic oscillation energy. The integral of energy over time defines the total action as a measure of dynamic performance, and its sensitivity allows comparing the performance of different actuators/locations in the system to select the most effective one to damp the oscillation energy. Time domain simulations in the IEEE 9-bus system and IEEE 39-bus system verify the findings obtained by the oscillation energy based analysis. Applications of the proposed method in control and system planning are discussed.