A Utility-Scale Flywheel Energy Storage System with a Shaftless, Hubless, High-Strength Steel Rotor

Li, Xiaojun; Anvari, Bahareh; Palazzolo, Alan; Wang, Zhiyang; Toliyat, H.A.

doi:10.1109/tie.2017.2772205

Cited by 86 publications

(33 citation statements)

References 17 publications

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“…In order to reduce the friction at high speed, the rotating mass is supported on two magnetic bearings. and with an objective of reducing losses due to aerodynamic forces, the flywheel is placed in a vessel with absolute or partial vacuum or a gas having a lower density than air (like helium) . For electric interface, bidirectional power converters are the necessary requirements between FES system and external grid for power exchange, which are controlled in such a way that the electrical machine is able to behave as a motor or generator as per need …”

Section: Energy Storage Methodsmentioning

confidence: 99%

“…and with an objective of reducing losses due to aerodynamic forces, the flywheel is placed in a vessel with absolute or partial vacuum or a gas having a lower density than air (like helium). 64,65 For electric interface, bidirectional power converters are the necessary requirements between FES system and external grid for power exchange, which are controlled in such a way that the electrical machine is able to behave as a motor or generator as per need. 66 Basically, there are two schemes for the operation of the flywheel: the low-speed FES system having spinning speed of less than 10 000 rpm and the high-speed FES system having spinning speed of 10 4 to 10 5 rpm.…”

Section: Flywheel Energy Storagementioning

confidence: 99%

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An updated review of energy storage systems: Classification and applications in distributed generation power systems incorporating renewable energy resources

2018

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Summary The demand of electric energy is increasing globally, and the fact remains that the major share of this energy is still being produced from the traditional generation technologies. However, the recent trends, for obvious reasons of environmental concerns, are indicating a paradigm shift towards distributed generation (DG) incorporating renewable energy resources (RERs). But there are associated challenges with high penetration of RERs as these resources are unpredictable and stochastic in nature, and as a result, it becomes difficult to provide immediate response to demand variations. This is where energy storage systems (ESSs) come to the rescue, and they not only can compensate the stochastic nature and sudden deficiencies of RERs but can also enhance the grid stability, reliability, and efficiency by providing services in power quality, bridging power, and energy management. This paper provides an extensive review of different ESSs, which have been in use and also the ones that are currently in developing stage, describing their working principles and giving a comparative analysis of important features and technical as well as economic characteristics. The wide range of storage technologies, with each ESS being different in terms of the scale of power, response time, energy/power density, discharge duration, and cost coupled with the complex characteristics matrices, makes it difficult to select a particular ESS for a specific application. The comparative analysis presented in this paper helps in this regard and provides a clear picture of the suitability of ESSs for different power system applications, categorized appropriately. The paper also brings out the associated challenges and suggests the future research directions.

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Section: Energy Storage Methodsmentioning

confidence: 99%

Section: Flywheel Energy Storagementioning

confidence: 99%

An updated review of energy storage systems: Classification and applications in distributed generation power systems incorporating renewable energy resources

2018

View full text Add to dashboard Cite

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“…Energy storage technologies are playing a crucial role for a vast number of power electronic applications, such as renewable energy sources [1][2][3] electric vehicles [4][5], transport [6][7] and micro grids [8][9][10]. Several methods of energy storage have been recently studied and proposed in order to address these issues, including flywheel [11], supercapacitors and electrochemical storage (ESS) in large batteries [12]. Among the ESS technologies the redox flow batteries and especially the all vanadium Redox Flow Batteries (VRFBs) are emerging as a competitive option for stationary electrochemical energy storage, due to their intrinsic combination of advantages including power/energy decoupling, long cycle life, low environmental impact and operational flexibility [13][14].…”

Section: Introductionmentioning

confidence: 99%

Maximizing Vanadium Redox Flow Battery Efficiency: Strategies of Flow Rate Control

Trovò

Picano

Guarnieri

2019

2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)

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Vanadium redox flow batteries (VRFBs) are one of the most promising technologies for large-scale energy storage due to their flexible energy and power capacity configurations. The energy losses evaluation assumes a very important rule on the VRFB characterization in order increase the efficiency of the battery. Very few papers describe the relations between hydraulic, electrical and chemical contributions to the system energy losses, especially in a large size VRFB system. In the first part a fluid dynamics characterization of a 9kW / 27 kWh VRFB test facility has been conducted. In particular, we will consider the internal resistance as the sum of an ohmic and a transport resistance. Secondly, an overall loss assessment based on both numerical and experimental results has been carried out. Finally, some improvements in the battery management strategy and in stack engineering are proposed, that results from this work and can help the future designer to develop more efficient VRFB stack with a compact design.

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“…Active magnetic levitation is found nowadays in industrial systems where contact-free operation is advantageous. Typical applications include the support of compressors, turbines and flywheels in vacuum, manufacturing, and oil-and-gas industrial fields [1][2][3][4]. High efficiency, low maintenance cost and control of the hovering dynamics are some of the key benefits of this technology [1,5].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Levitation Control Based on Flux Density and Current Measurement

et al. 2018

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This paper presents an active magnetic levitation application that exploits the measurement of coil current and flux density to determine the displacement of the mover. To this end, the nonlinear behavior of the plant and the physical sensing principle are modeled with a finite element approach at different air gap lengths and coil currents. A linear dynamic model is then obtained at the operating point as well as a linear relation for the displacement estimates. The effectiveness of the modeling approach and the performance of the sensing and control techniques are validated experimentally on an active magnetic levitation system. The results demonstrate that the solution is able to estimate the displacement of the mover with a relative error below 3% with respect to the nominal air gap. Additionally, this approach can be exploited for academic purposes and may serve as a reference to implement simple but accurate active magnetic levitation control using low-cost, off-the-shelf sensors.

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A Utility-Scale Flywheel Energy Storage System with a Shaftless, Hubless, High-Strength Steel Rotor

Cited by 86 publications

References 17 publications

An updated review of energy storage systems: Classification and applications in distributed generation power systems incorporating renewable energy resources

An updated review of energy storage systems: Classification and applications in distributed generation power systems incorporating renewable energy resources

Maximizing Vanadium Redox Flow Battery Efficiency: Strategies of Flow Rate Control

Magnetic Levitation Control Based on Flux Density and Current Measurement

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