Power Electronics for Grid-Scale Energy Storage

Grainger, Brandon M.; Reed, Gregory F.; Sparacino, Adam R.; Lewis, Phil

doi:10.1109/jproc.2014.2319819

Cited by 54 publications

(36 citation statements)

References 34 publications

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“…The grid was modelled with a three-phase AC voltage source in series with a line impedance of 50 µH and 50 mΩ. In other hand, the battery is modelled by a DC voltage source in series with a resistance of 0.5 Ω as an approximation for the battery internal impedance [9]. For these comparative tests, was decided to control the converter to follow a reference of power at the battery pack.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The power conversion block consists in a bidirectional power conversion system (PCS) to interface the batteries with the electric power grid. Several solutions were been proposed for the PCS [9][10][11][12]. The first one is a classical solution, implemented with a three-phase voltage source converter (VSC) [13] and a buck-boost DC-DC converter to regulate the voltage and current in the batteries.…”

Section: Introductionmentioning

confidence: 99%

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Towards a new technological solution for community energy storage

Varajão

Miranda

Araújo

2014

2014 16th European Conference on Power Electronics and Applications

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Energy storage in low voltage grid is receiving increased attention due to renewables integration and consumption growth, challenges faced nowadays by grid operators. In this work, a study of main implementation issues for community energy storage (CES) is presented along with a comparison between possible solutions for the bidirectional isolated power conversion system (PCS) to interface a battery pack with the electric power grid. The aim of this research is to increase the power density of the power converter and keeping simultaneously the same reliability of traditional solutions. These goals are pursued to be achieved through the reduction of the conversion stages and utilization of new optimization methodologies to reduce the volume of the passive components. The proposed topology for the PCS is based on a matrix converter (MC) that performs a direct AC to AC conversion between the grid and a high-frequency transformer (HFT). With this solution it is possible to eliminate the traditional DC-link capacitor and obtain a single-stage power conversion with bidirectional power flow capability. This proposed solution is evaluated and compared with a conventional two-stage topology through extensive simulation. Two prototypes systems were designed for a 10kW PCS to connect the three-phase 230/400Vrms, 50Hz mains to a battery pack with voltage range of 320V to 490V. Simulation results are presented to assess the power quality provided by the front-end and the battery side converters, as well as performance evaluation and efficiency analysis.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards a new technological solution for community energy storage

Varajão

Miranda

Araújo

2014

2014 16th European Conference on Power Electronics and Applications

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“…Power electronics is making profound changes within the transportation sector [1,2] and the electric power system [3,4]. Bidirectional AC-DC converters are required for several applications, such as battery energy storage systems (BESS) [2,5], chargers for electric vehicles (EVs) [6][7][8], uninterruptible power supplies (UPS) [9], solid-state transformers (SST) [10], and DC microgrids [11]. The development of new wide bandgap power semiconductors combined with enhanced modulations and control techniques are contributing for the miniaturization and efficiency improvement of the power electronics converters [12].…”

Section: Introductionmentioning

confidence: 99%

EMI Filter Design for a Single-stage Bidirectional and Isolated AC–DC Matrix Converter

et al. 2018

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This paper describes the design of an electromagnetic interference (EMI) filter for the high-frequency link matrix converter (HFLMC). The proposed method aims to systematize the design process for pre-compliance with CISPR 11 Class B standard in the frequency range 150 kHz to 30 MHz. This approach can be extended to other current source converters which allows time-savings during the project of the filter. Conducted emissions are estimated through extended simulation and take into account the effect of the measurement apparatus. Differential-mode (DM) and common-mode (CM) filtering stages are projected separately and then integrated in a synergistic way in a single PCB to reduce volume and weight. A prototype of the filter was constructed and tested in the laboratory. Experimental results with the characterization of the insertion losses following the CISPR 17 standard are provided. The attenuation capability of the filter was demonstrated in the final part of the paper.

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“…The utility-scale photovoltaic (PV) energy systems are usually comprised of a single-stage system, where the inverter will take care of both the PV generator and grid integration duties. The requirement of coordinated constant power or power curtailment operation mode [4][5][6], as well as the power fluctuation control by means of energy storage facilities [7], may eventually change the PV system topology into a two-stage system, where a DC-DC converter takes care of the PV-generator interfacing duties, and the inverter takes care of the grid-interfacing duties, respectively. The PV-generator-interfacing DC-DC converter is typically a boost-power-stage converter [4], which is implemented by adding a capacitor at the input terminal of the conventional (i.e., voltage-fed) boost converter for satisfying the terminal constraints stipulated by the PV generator [8].…”

Section: Introductionmentioning

confidence: 99%

Grid-Forming-Mode Operation of Boost-Power-Stage Converter in PV-Generator-Interfacing Applications

2017

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Abstract:The application of constant power control and inclusion of energy storage in grid-connected photovoltaic (PV) energy systems may increase the use of two-stage system structures composed of DC-DC-converter-interfaced PV generator and grid-connected inverter connected in cascade. A typical PV-generator-interfacing DC-DC converter is a boost-power-stage converter. The renewable energy system may operate in three different operation modes-grid-forming, grid-feeding, and grid-supporting modes. In the last two operation modes, the outmost feedback loops are taken from the input terminal of the associated power electronic converters, which usually does not pose stability problems in terms of their input sources. In the grid-forming operation mode, the outmost feedback loops have to be connected to the output terminal of the associated power electronic converters, and hence the input terminal will behave as a negative incremental resistor at low frequencies. This property will limit the operation of the PV interfacing converter in either the constant voltage or constant current region of the PV generator for ensuring stable operation. The boost-power-stage converter can be applied as a voltage or current-fed converter limiting the stable operation region accordingly. The investigations of this paper show explicitly that only the voltage-fed mode would provide feasible dynamic and stability properties as a viable interfacing converter.

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Power Electronics for Grid-Scale Energy Storage

Cited by 54 publications

References 34 publications

Towards a new technological solution for community energy storage

Towards a new technological solution for community energy storage

EMI Filter Design for a Single-stage Bidirectional and Isolated AC–DC Matrix Converter

Grid-Forming-Mode Operation of Boost-Power-Stage Converter in PV-Generator-Interfacing Applications

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