A Novel Bidirectional DC-DC Converter with Robust Control Scheme for Flywheel Energy Storage System

2011 ◽  
Vol 383-390 ◽  
pp. 3545-3551
Author(s):  
Jin Qiao Yuan ◽  
Yong Li Li ◽  
Bo Tong Li ◽  
Jie Sun ◽  
Zhen Tan
Keyword(s):  
Energy Storage ◽  
Robust Control ◽  
High Performance ◽  
Storage System ◽  
Energy Storage System ◽  
Current Control ◽  
Flywheel Energy Storage ◽  
Flywheel Energy Storage System ◽  
Control Scheme ◽  
Bidirectional Power Flow

This study presents a novel bidirectional dc-dc buck-boost converter compatible with the flywheel energy storage system (FESS) and a robust control for bidirectional power flow, according to the single cycle average current control scheme and proportional-integral (PI) control theory. The proposed converter and its control are designed to adjust voltage to achieve current limiting start up and final speed keeping of the motor in charge mode and maintain a constant output voltage in the case that terminal voltage of the motor in the FESS drops continually in discharge mode. Simulation results demonstrate high performance of the converter in both steady-state and dynamic operations.

Dynamic performance improvement of a hybrid multimachine system using a flywheel energy storage system

2019 ◽  
Vol 44 (3) ◽  
pp. 239-252 ◽  
Author(s):  
Hailiya Ahsan ◽  
Mairaj-ud-Din Mufti
Keyword(s):  
Energy Storage ◽  
Transient Stability ◽  
Dynamic Performance ◽  
Storage System ◽  
Current Source ◽  
Energy Storage System ◽  
Wind Condition ◽  
Flywheel Energy Storage ◽  
Flywheel Energy Storage System ◽  
Control Scheme

This article presents a detailed, yet simple control scheme based on a flywheel energy storage system for dynamic performance enhancement. A permanent magnet machine-based 70 MW flywheel energy storage system is incorporated in a wind-integrated Western System Coordinating Council multimachine system. An elaborate mathematical modelling of the flywheel energy storage system as an effective current source is provided along with the wind-embedded multimachine system to investigate the transient stability profile of the said system. Generator speed and voltage are continuously monitored by the flywheel energy storage system plant controllers, and subsequent real and reactive reference power commands are generated. Two first-order lag blocks are employed to emulate the grid side and machine side converters’ dynamics. The developed non-linear model is tested against three-phase faults in a variable wind condition, and the effectiveness of the control scheme is confirmed by the enormous damping and extension in the stability margin of the system.

Nonlinear modeling and simulation of flywheel energy storage rotor system with looseness and rub-impact coupling hitch

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhu Youfeng ◽  
Liu Xinhua ◽  
Wang Qiang ◽  
Wang Zibo ◽  
Zang Hongyu
Keyword(s):  
Energy Storage ◽  
Differential Equations ◽  
Nonlinear Modeling ◽  
Storage System ◽  
Energy Storage System ◽  
Rotor System ◽  
Flywheel Energy Storage ◽  
Flywheel Energy Storage System ◽  
New Energy ◽  
Single Disk

Abstract Flywheel energy storage system as a new energy source is widely studied. This paper establishes a dynamic model of a single disk looseness and rub-impact coupling hitch flywheel energy storage rotor system firstly. Then dynamic differential equations of the system under the condition of nonlinear oil film force of the sliding bearing are given. Runge–Kutta method is used to solve the simplified dimensionless differential equations. The effect of variable parameters such as disk eccentricity, stator stiffness and bearing support mass on the system are analyzed. With the increase of eccentricity, the range of period-three motion is significantly reduced and the range of chaotic motion begins to appear in the bifurcation diagram. Meanwhile, stiffness of the stator and mass of the bearing support have a significant influence on the flywheel energy storage rotor system.

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