Output Levelling of Renewable Energy by Electric Double-Layer Capacitor Applied for Energy Storage System

Kinjo, Tadatsugu; Senjyu, Tomonobu; Urasaki, Naomitsu; Fujita, Hideki

doi:10.1109/tec.2005.853752

Cited by 207 publications

(84 citation statements)

References 13 publications

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“…Simulation parameters of power system, PV array, power converter and PI controller are shown in TABLE III. Here, integral time T is 100 s, sampling time T s to obtain discrete value of output power command is 10 s, and sampling time of PI controller is 1 ms. Simulation time is 30 minutes and the averaging sample time of insolation is 20 s. The comparative simulation results of the proposed control and MPPT control [4] are shown in Fig. 9 by solid line and dotted line respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

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PV output power fluctuations smoothing and optimum capacity of energy storage system for PV power generator

Senjyu¹,

Datta²,

Yona³

et al. 2008

REPQJ

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Abstract. In this paper, an Energy Storage System (ESS) based control method is proposed to reduce the PV output power fluctuations, which in turn will reduce the frequency deviations of the power system introduced by large penetration of PV power. The ESS control model introduced here will maintain the energy storage ratio of the ESS near 50%. This will increase the life time of the ESS as well as will decrease the maintenance cost of the ESS. A local search algorithm is also provided with this ESS control model to search the optimal capacity of the ESS required for smoothing the PV output power fluctuations and to find the minimum capital cost. A cost comparison is shown to realize the performance of the search algorithm.

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Section: Simulation Resultsmentioning

confidence: 99%

“…There have been investigations aimed at improving the performance of PV systems equipped with batteries [4]- [9]. However, energy storage device increases capital cost, as it needs maintenance.…”

Section: Introductionmentioning

confidence: 99%

PV output power fluctuations smoothing and optimum capacity of energy storage system for PV power generator

Senjyu¹,

Datta²,

Yona³

et al. 2008

REPQJ

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“…The transformer is indispensable for some applications that require voltage matching and/or galvanic isolation between the utility grid and the energy storage device. Replacing the line-frequency transformer with a high-frequency isolated dc-dc converter would make the energy storage system more compact and flexible [2]. Various bidirectional isolated dc-dc converters have been proposed as the interface to energy storage devices with focus on automotive or fuel cell applications.…”

Section: Iintroductionmentioning

confidence: 99%

A Novel Grid Connected Dc-Dc Converter

Mahesh¹,

Reddy²

2014

IJAREEIE

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This paper proposes a three-port grid based dc-to-dc power conversion circuit for low range distributed systems. With this converter, the load can be powered from two different dc sources, which can be a combination of two from a solar-cell panel, a fuel-cell set, a battery bank, etc. and grid source,. The power conversion circuit consists of two active power switches by commonly using an inductor and an output filter capacitor and also the gate pulses of ac inverter circuit. By adjusting the duty-ratio of the active power switch and gate pulses, the voltage regulation at the output as well as the power coordination between two input sources can be made. An experimental circuit has been built and tested to verify the analyzed and simulated results. KEYWORDS: DC-DC converter, Continuous Conduction Mode, Discontinuous Conduction Mode, Grid system I.INTRODUCTIONGenerally, electric power generated by renewable energy sources is unstable in nature, thus producing a bad effect on the utility grid. This fact spurs research on energy storage systems to smooth out active-power flow on the utility grid. Simplified existing energy storage system employing a line-frequency (50-or 60-Hz) transformer, a PWM converter, a bidirectional chopper, and an energy storage device such as electric double layer capacitors (EDLCs) or lithium-ion batteries [1]. The transformer is indispensable for some applications that require voltage matching and/or galvanic isolation between the utility grid and the energy storage device. Replacing the line-frequency transformer with a high-frequency isolated dc-dc converter would make the energy storage system more compact and flexible [2]. Various bidirectional isolated dc-dc converters have been proposed as the interface to energy storage devices with focus on automotive or fuel cell applications. Most of the presented dc-dc converters have asymmetrical circuit configurations to couple the two dc links having largely different voltages, several tens volts and several hundred volts.A bidirectional isolated dc-dc converter presented in 1991. It had two symmetrical single-phase voltage-source full-bridge converters. It suffered from a low efficiency because the first-generation IGBTs were used as switching power devices at that time. However, advancement in power device technology over the last decade has enabled the dcdc converter to operate at an efficiency as high as 97% by using the latest trench-gate IGBTs. A similar dc-dc converter has also achieved an efficiency of 97%. In addition, the use of silicon-carbide power devices in the near future will raise it to 99% [3]. Therefore, the dc-dc converter has become a promising candidate as a power electronic interface for an energy storage system. A bidirectional converter has been discussed to exchange electric power between a fuel cell, a battery, and a load, based on a three-port extension of the circuit presented [4]. The energy storage system using the bidirectional isolated dc-dc converter appropriately choosing the transformer turn rat...

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“…The essential part of the renewable energy system is a storage element [1][2][3][4][5][6]. The storage element gathers the energy fluctuations and enables to improve the system dynamic properties.…”

Section: Introductionmentioning

confidence: 99%

A bidirectional DC-DC converter for renewable energy systems

Jalbrzykowski¹,

Citko²

2009

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. To improve the energy quality, most of the renewable energy systems include an energy storage element charged by the bidirectional DC-DC converter. This paper proposes the bidirectional DC-DC converter which employs the two bridge configuration resonant class-E converters on the both sides of the isolating transformer. The low side converter is controlled as step up and the high side converter is controlled as step down. The proposed system is characterized by good dynamic properties and high efficiency because the converter transistors are switched in ZVS conditions. A theoretical analysis to provide relations for system design, and the laboratory model investigations to validate the system characteristic are given in the paper.

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Output Levelling of Renewable Energy by Electric Double-Layer Capacitor Applied for Energy Storage System

Cited by 207 publications

References 13 publications

PV output power fluctuations smoothing and optimum capacity of energy storage system for PV power generator

PV output power fluctuations smoothing and optimum capacity of energy storage system for PV power generator

A Novel Grid Connected Dc-Dc Converter

A bidirectional DC-DC converter for renewable energy systems

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