Modeling and control of a flywheel energy storage system for uninterruptible power supply

Zhang, Long; Qi, Zhi Ping

doi:10.1109/supergen.2009.5348077

Cited by 15 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Power quality issues have been a top concern for modern power generation and distribution systems. Seasonal loads and electrical distortions make the power system unstable and generate the power quality problems: the instantaneous interruption, voltage sag, flickers, short-term power-off [7], lack of reactive power or active power [8], and etc. In order to solve these problems, variety of energy storage systems are applied with different terminologies.…”

Section: Requirement Of Fess In Power Systemsmentioning

confidence: 99%

“…This is accomplished by locking the phase of the reference system such that the rotor flux is entirely in the d-axis (flux axis), resulting in the mathematical constraint qr 0 . [25] Therefore, (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) The torque equation shows a proportional relation between the desired torque and the torque-producing current component qs i . Therefore, a linear torque control is achieved and only proportional to torque-producing current qs i when rotor flux is fixed.…”

Section: Decoupling Control Technique Of Focmentioning

confidence: 99%

“…to eliminate dr i yields the equation relating ds i and The relation between the flux-producing current ds i and the rotor flux dr  , is a first-order linear transfer function with a time constant r  , where r r r L / R  From the derivations above, Eqn. (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) shows that the electrical torque is only proportional to i qs * when rotor flux is fixed without an interaction with i ds *. Eqn.…”

Section: Decoupling Control Technique Of Focmentioning

confidence: 99%

“…In order to overcome the sudden change of the applied flux excitation current, the excitation current is applied with a ramp control (Fig. [3][4][5][6][7][8][9][10][11]. The relationship between the setting times vs. ramp rate is investigated in Fig.…”

Section: Investigation On Settling Time Vs Ramp Rate Controlmentioning

confidence: 99%

See 3 more Smart Citations

Sensorless speed estimation for long term flywheel energy storage system in standby mode.

Liu¹

2021

Preprint

View full text Add to dashboard Cite

A novel technique for sensorless speed estimation is presented in this thesis for squirrel cage induction machine (SCIM) drived long-term flywheel energy storage system (FESS) in standby mode. The SCIM model for long-term large-capacity FESS is presented. Based on dynamic model , a hybrid rotor flux observer and speed observer are derived. The hybrid rotor flux observer takes advantages of both the current model and voltage model flux observers by seamlessly incorporating these two models together for a better flux estimation performance even at low speed range. The fundamental speed observer is derived from the dynamic model for speed estimation with a fast response time for a tradeoff of the adaptive capabilities. In order to observe the speed in standby mode, a modified field-oriented control (FOC) scheme is presented. The hybrid flux observer and speed observer are tested in association with the modified FOC. The proposed control technique adopts approaches in an effort to minimize the impact generated by the excitation and speed estimation process to the FESS. Simulation and experiments are conducted to verify the feasibility of the proposed speed estimation at the standby mode. It is also observed that a step change of excitation current has a significant impact to the existing FESS. A ramp control for excitation current is added to avoid the possible oscillation of the estimated speed and the disturbance to the FESS. The speed estimation settling time is optimized based on the experiment and simulation.

show abstract

Section: Requirement Of Fess In Power Systemsmentioning

confidence: 99%

Section: Decoupling Control Technique Of Focmentioning

confidence: 99%

Section: Decoupling Control Technique Of Focmentioning

confidence: 99%

Section: Investigation On Settling Time Vs Ramp Rate Controlmentioning

confidence: 99%

See 2 more Smart Citations

Sensorless speed estimation for long term flywheel energy storage system in standby mode.

Liu¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The advantages of flywheel systems versus chemical batteries includes higher power density, environmental friendliness, longer lifespan, operation over a wider temperature range, greater number of charge-discharge cycles and ease of identifying the state of charge (SOC) (i.e., by checking the speed). As a result, FESS is now considered a promising technology for many applications including power quality improvement, uninterruptible power system (UPS), grid frequency regulation, spacecraft attitude control and energy storage, and regenerative braking in rail transportation [1][2].…”

Section: Introductionmentioning

confidence: 99%

Research on Discharge Control Strategies for FESS Array Based on DC Parallel Connection

Liu¹,

Tang²,

Zhang³

et al. 2012

2012 Asia-Pacific Power and Energy Engineering Conference

View full text Add to dashboard Cite

Flywheel Energy Storage System (FESS) , which stores energy in a rotating mass, is now considered a promising technology for many applications due to its significant advantages versus chemical batteries. Integrating multiple modular FESS units to form a FESS array is a suitable solution to attain large capacity energy storage. This paper presents a FESS array topology for an uninterruptible power supply (UPS) system. And three discharge control strategies were adopted, i.e., equal power strategy, equal torque strategy and equal time duration strategy. The above strategies were verified by simulation in Matlab/Simulink, and the results indicate that all of the three can control the discharging process of the FESS array accurately, stabilize the dc bus voltage and make voltagesensitive load not affected by grid power interruption. However, the equal time duration strategy can make the FESS array work longer while the equal torque strategy is more simple and practical in operation.

show abstract

Design and simulation issues for secure power networks as resilient smart grid infrastructure

Mohammed

Youssef

Cintuglu

et al. 2017

Smart Energy Grid Engineering

View full text Add to dashboard Cite

Modeling and control of a flywheel energy storage system for uninterruptible power supply

Cited by 15 publications

References 5 publications

Sensorless speed estimation for long term flywheel energy storage system in standby mode.

Sensorless speed estimation for long term flywheel energy storage system in standby mode.

Research on Discharge Control Strategies for FESS Array Based on DC Parallel Connection

Design and simulation issues for secure power networks as resilient smart grid infrastructure

Contact Info

Product

Resources

About