A Power Smoothing System Based on Supercapacitors for Renewable Distributed Generation

Pegueroles-Queralt, Jordi; Bianchi, Fernando D.; Gomis‐Bellmunt, Oriol

doi:10.1109/tie.2014.2327554

Cited by 109 publications

(69 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A supercapacitor module functioned by supplying energy to regulate the DC-bus energy, and the fuel cell supplied energy to the supercapacitor module in order to keep it charged. The literature [21] presented a power smoothing strategy based on a supercapacitor for power conditioning of distributed renewable generation. The power smoothing controller generated the power reference for the DC/DC converter, which has a power tracking control implemented with sliding-mode techniques.…”

Section: Figurementioning

confidence: 99%

“…Thus, the ESS is charged and discharges very rapidly [21], which places severe demands on the voltage equalizer. The system needs to supply a large equalization current to equalize the voltage in a short amount of time.…”

Section: Figurementioning

confidence: 99%

“…There are many papers [20][21][22][23][24] concerned about the renewable energy storage system. Figure 1 shows the typical structure of the supercapacitor ESS in a renewable generation system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A High-Efficiency Voltage Equalization Scheme for Supercapacitor Energy Storage System in Renewable Generation Applications

Huang

et al. 2016

Sustainability

View full text Add to dashboard Cite

Due to its fast charge and discharge rate, a supercapacitor-based energy storage system is especially suitable for power smoothing in renewable energy generation applications. Voltage equalization is essential for series-connected supercapacitors in an energy storage system, because it supports the system's sustainability and maximizes the available cell energy. In this paper, we present a high-efficiency voltage equalization scheme for supercapacitor energy storage systems in renewable generation applications. We propose an improved isolated converter topology that uses a multi-winding transformer. An improved push-pull forward circuit is applied on the primary side of the transformer. A coupling inductor is added on the primary side to allow the switches to operate under the zero-voltage switching (ZVS) condition, which reduces switching losses. The diodes in the rectifier are replaced with metal-oxide-semiconductor field-effect transistors (MOSFETs) to reduce the power dissipation of the secondary side. In order to simplify the control, we designed a controllable rectifying circuit to achieve synchronous rectifying on the secondary side of the transformer. The experimental results verified the effectiveness of the proposed design.

show abstract

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

A High-Efficiency Voltage Equalization Scheme for Supercapacitor Energy Storage System in Renewable Generation Applications

Huang

et al. 2016

Sustainability

View full text Add to dashboard Cite

show abstract

“…Power-smoothing schemes of WTGs can be divided into two groups: those with or without energy storage systems (ESSs) [8][9][10][11][12]. In [8][9][10], ESSs such as flywheels, supercapacitors, or batteries were suggested to smooth the frequency fluctuation caused by WTGs.…”

Section: Introductionmentioning

confidence: 99%

“…In [8][9][10], ESSs such as flywheels, supercapacitors, or batteries were suggested to smooth the frequency fluctuation caused by WTGs. ESSs help mitigate the frequency fluctuation by using their stored energy; however, these devices require an extra cost for installation and maintenance, particularly for a large-scale WTG.…”

Section: Introductionmentioning

confidence: 99%

Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation

et al. 2017

View full text Add to dashboard Cite

Abstract:In an electric power grid that has a high penetration level of wind, the power fluctuation of a large-scale wind power plant (WPP) caused by varying wind speeds deteriorates the system frequency regulation. This paper proposes a power-smoothing scheme of a doubly-fed induction generator (DFIG) that significantly mitigates the system frequency fluctuation while preventing over-deceleration of the rotor speed. The proposed scheme employs an additional control loop relying on the system frequency deviation that operates in combination with the maximum power point tracking control loop. To improve the power-smoothing capability while preventing over-deceleration of the rotor speed, the gain of the additional loop is modified with the rotor speed and frequency deviation. The gain is set to be high if the rotor speed and/or frequency deviation is large. The simulation results based on the IEEE 14-bus system clearly demonstrate that the proposed scheme significantly lessens the output power fluctuation of a WPP under various scenarios by modifying the gain with the rotor speed and frequency deviation, and thereby it can regulate the frequency deviation within a narrow range.

show abstract

Band‐Pass Filter and Relaxation Oscillator using Electric Double‐Layer Capacitor

et al. 2018

View full text Add to dashboard Cite

Supercapacitors are electrochemical devices that can store and restore electrical energy and are mostly used for powering dc or close‐to‐dc applications. As such they have not been explored enough for non‐dc circuits. In this study, we implement a band‐pass for frequency selectivity purposes and a relaxation oscillator for timing applications using a solid‐state carbon electric double‐layer capacitor. The expected behavior was observed for both circuits in the sub‐Hertz and tens of Hertz frequency ranges. This confirms the possibility of using the frequency‐dependent capacitive behavior of such devices in non‐conventional low frequency applications not related to dc energy storage but requiring large time constants.

show abstract

A Power Smoothing System Based on Supercapacitors for Renewable Distributed Generation

Cited by 109 publications

References 27 publications

A High-Efficiency Voltage Equalization Scheme for Supercapacitor Energy Storage System in Renewable Generation Applications

A High-Efficiency Voltage Equalization Scheme for Supercapacitor Energy Storage System in Renewable Generation Applications

Power-Smoothing Scheme of a DFIG Using the Adaptive Gain Depending on the Rotor Speed and Frequency Deviation

Band‐Pass Filter and Relaxation Oscillator using Electric Double‐Layer Capacitor

Contact Info

Product

Resources

About