Abstract
Application of Flywheel Energy Storage System (FESS) to damp multi-mode oscillations is investigated in multi-machine power systems. The feasibility of damping multi-mode oscillations with FESS is proved by application of Damping Torque Analysis (DTA). Making use of the characteristic of the independent of the active and reactive power control loops of the FESS, the method of the single FESS to damp multi-mode oscillations is proposed by superposing stabilizers on each control loop, which damp different oscillation mode respectively. The control loop and feedback signal are selected for each mode base on control theory, and the parameters of FESS-based stabilizers are tuned by Particle swarm optimization (PSO). Finally, with a four-machine power system case investigated, the eigenvalue and non-linear simulation results show that single FESS has ability of damping power system multi-mode oscillations.DOI: http://dx.doi.org/10.5755/j01.eee.19.2.1699
Highlights
In the recent years, researchers all over the world have done a lot of work on using Flywheel Energy Storage System (FESS) to improve the stability of power system consisting of doubly-fed induction motors (DFIM) [1], [2]
This paper mainly describes the theory on damping power system multi-mode oscillation using FESS
Control loops and feedback signals are chosen based on control theory, and particle swarm optimization (PSO) is used to tune the parameters of the stabilizers
Summary
Researchers all over the world have done a lot of work on using FESS to improve the stability of power system consisting of doubly-fed induction motors (DFIM) [1], [2]. There are few research papers on applying FESS to damp multi-mode oscillation in multi-machine system. The usual solution is to configure stabilizers in multi-machine system according to each oscillation mode respectively [3]. FESS has two independent loops to control active power and reactive power respectively. Because both of its loops can be configured with stabilizers, FESS device has the ability to damp multi-mode oscillation in power systems. This paper mainly describes the theory on damping power system multi-mode oscillation using FESS. Control loops and feedback signals are chosen based on control theory, and particle swarm optimization (PSO) is used to tune the parameters of the stabilizers. A four-machine power system case was investigated to testify the validity of the proposed method
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