Utilization of Optimal Control Law to Size Grid-Level Flywheel Energy Storage

Hearn, C.S.; Lewis, Michael; Pratap, S.B.; Hebner, Robert E.; Uriarte, Fabian M.; Chen, Dongmei; Longoria, Raul G.

doi:10.1109/tste.2013.2238564

Cited by 46 publications

(36 citation statements)

References 13 publications

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“…(12) and (14-16) term 1/ t should be replaced with  t . The case when motor torque T m , and cable reel torque T w , operating in the same direction happen during the cable unwinding is shown in Fig.…”

Section: Fig 2 Schematic View Of the Cable Reel Drive -Winding/unwinmentioning

confidence: 99%

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The Monospiral Motorised Cable Reel in Crane Applications

et al. 2017

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Section: Fig 2 Schematic View Of the Cable Reel Drive -Winding/unwinmentioning

confidence: 99%

“…On the other hand, some experts only consider mechanical energysaving methods. For example, in [12] the use of flywheel in the operation process of the crane is proposed to perform energy recovery.…”

Section: Introductionmentioning

confidence: 99%

The Monospiral Motorised Cable Reel in Crane Applications

et al. 2017

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“…The authors of [32] investigated the mathematical model and the topology of a HESS based on superconducting magnetic energy storage (SMES) and battery, and a novel system-level control strategy for reasonable and effective power allocation between SMES and battery is proposed. In [33], the authors presented a methodology to size flywheel energy storage for grid-level applications using an optimal control law, which performs trade-offs between minimizing grid power consumption and flywheel energy storage size. The characteristics of flywheel-such as high efficiency, high power density and high self-discharge rate-are considered in the methodology, and case study in this work indicates that the flywheel reduced peak grid power by 8%.…”

Section: Introductionmentioning

confidence: 99%

Optimized Planning of Power Source Capacity in Microgrid, Considering Combinations of Energy Storage Devices

et al. 2016

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Since renewable energy resource is universally accepted as a promising method to solve the global energy problem, optimal planning and utilization of various distributed generators (DG) and energy storage (ES) devices deserve special concern. ES devices possess various characteristics in power density, energy density, response speed (switching speed) and lifetime. Besides, as different load types have various requirements on power supply reliability according to their importance, coordinated planning with consideration of reasonable matching between power source and load can efficiently improve power supply reliability and economic efficiency via a customized power supply and compensation strategy. This paper focuses on optimization of power source capacity in microgrid and a coordinated planning strategy is proposed with integrated consideration of characteristics of DG, ES and load. An index named additional compensation ratio (ACR) for balancing economic efficiency and reliability is proposed and considered in the strategy. The objective function which aims to minimize life cycle cost (LCC) is established considering economic efficiency, reliability and environmental conservation. The proposed planning strategy and optimizing model is calculated and verified through case study of an autonomy microgrid.

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“…The authors envision a scenario where flywheel modules are deployed on the distribution grid so that a smart-grid operator could direct energy to points of anticipated future loads when it is most optimal to do so, such as when local renewable generation is available or when the grid is lightly loaded, and could similarly draw energy from the storage modules in a manner that increases grid stability and efficiency. A study of a similar use-case was conducted in [8] for flywheel systems placed at various locations on the distribution grid to provide load-following and smoothing.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Equivalent Circuit Modeling of the AC Homopolar Machine for Flywheel Energy Storage

Severson

Nilssen

Undeland

et al. 2015

IEEE Trans. Energy Convers.

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This paper develops a magnetic equivalent circuit model suitable to the design and optimization of the synchronous ac homopolar machine. The ac homopolar machine is of particular interest in the application of grid-based flywheel energy storage, where it has the potential to significantly reduce self-discharge associated with magnetic losses. The ac homopolar machine features both axial and radial magnetizing flux paths, which requires finite element analysis to be conducted in 3-D. The computation time associated with 3-D finite element modeling is highly prohibitive in the design process. The magnetic equivalent circuit model developed in this paper is shown to be a viable alternative for calculating several design performance parameters and has a computation time which is orders of magnitude less than that of 3-D finite element analysis. Results obtained from the developed model are shown to be in good agreement with finite element and experimental results for varying levels of saturation.Index Terms-Energy storage, finite element analysis, flywheels, magnetic equivalent circuit (MEC), renewable generation. ;).R. Nilssen and T. Undeland are with the Department of Electric Power Engineering,

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Utilization of Optimal Control Law to Size Grid-Level Flywheel Energy Storage

Cited by 46 publications

References 13 publications

The Monospiral Motorised Cable Reel in Crane Applications

The Monospiral Motorised Cable Reel in Crane Applications

Optimized Planning of Power Source Capacity in Microgrid, Considering Combinations of Energy Storage Devices

Magnetic Equivalent Circuit Modeling of the AC Homopolar Machine for Flywheel Energy Storage

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