Oscillation energy based sensitivity analysis and control for multi-mode oscillation systems
For power system engineers, it addresses the problem of damping multi-mode oscillations when multiple modes have similar damping ratios.
This paper proposes an oscillation energy-based sensitivity analysis to handle multi-mode oscillation systems where traditional single-mode analysis fails. The method selects the most effective actuator by comparing energy sensitivities, validated on IEEE 9-bus and 39-bus systems.
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.