A new simplified model of Double-Layer Capacitors

Faranda, R.; Gallina, M.; Son, Donghee

doi:10.1109/iccep.2007.384288

Cited by 89 publications

(80 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Equivalent circuit models for supercapacitors have been proposed for decades, though these have generally been aimed at 'large' supercapacitors with capacitances of many hundreds of Farads (such as those proposed for use in electric vehicles) [12]. These models all share a representation of a supercapacitor having a number of time constants which cover many orders of magnitude (in fact, most of the different equivalent models proposed can be transformed to one-another from a generic model [13]). One of these, the 'ladder-model', is shown in Fig.…”

Section: A Methods For Obtaining Empirical Leakage Resultsmentioning

confidence: 99%

Supercapacitor leakage in energy-harvesting sensor nodes: Fact or fiction?

Merrett

Weddell

2012

2012 Ninth International Conference on Networked Sensing (INSS)

View full text Add to dashboard Cite

Abstract-As interest in energy-harvesting sensor nodes continues to grow, the use of supercapacitors as energy stores or buffers is gaining popularity. The reasons for their use are numerous, and include their high power density, simple interfacing requirements, simpler measurement of state-ofcharge, and a greater number of charging cycles than secondary batteries. However, supercapacitor energy densities are orders of magnitude lower. Furthermore, they have been reported to exhibit significant leakage, and this has been shown to increase exponentially with terminal voltage (and hence stored energy). This observation has resulted in a number of algorithms, designs and methods being proposed for effective operation of supercapacitor-based energy-harvesting sensor nodes. In this paper, it is argued that traditional 'leakage' is not as significant as has commonly been suggested. Instead, what is observed as leakage is in fact predominantly due to internal charge redistribution. As a result, it is suggested that different approaches are required in order to effectively utilize supercapacitors in energy-harvesting sensor nodes.

show abstract

Section: A Methods For Obtaining Empirical Leakage Resultsmentioning

confidence: 99%

Supercapacitor leakage in energy-harvesting sensor nodes: Fact or fiction?

Merrett

Weddell

2012

2012 Ninth International Conference on Networked Sensing (INSS)

View full text Add to dashboard Cite

show abstract

“…Simulation model of the Supercapacitor Supercapacitor are usually double layered capacitor or DLC's and typically have very high capacitance value allowing them to store large quantities of electrical energy but the voltage remains low (maximum 3V) [8]. So, it helps to drive motor, pump and other electro-mechanical devices which requires impulsive power.…”

Section: Amentioning

confidence: 99%

Storage Efficiency Optimization of a Supercapacitor Charged by a Photovoltaic Cell using Genetic Algorithm

Seth¹,

Mukherjee²,

Dutta³

et al. 2017

International Advanced Research Journal in Science, Engineering

View full text Add to dashboard Cite

Super capacitors are very power dense devices in which charge density depends on the value of the capacitance and voltage across it. Generally, high capacitance of the Supercapacitor would support higher energy storage density, voltage remaining fixed. The load driven also does not utilize properly the entire stored charge from the Super capacitor due to inconsistency in electrical characteristics between the load and source. Storage efficiency of Super capacitor has state of charge dependencies as it is variable over the duration of charge/discharge cycles. It depends directly on the capacitance and indirectly on the ESR value. The proposed optimization technique can significantly find the maximum value of storage efficiency at a near about minimum value of ESR and maximum value of capacitance. The simulation model and results show the advantage of the said technique.

show abstract

“…In this paper, it is proposed to use an SC as a storage device, because of its short-time storage capabilities, its high power and energy density, along with the attributes of being low cost, high efficiency, having a fast time response and a long life span [20,21,24,28,43]. All of these features adequately fit the LVRT requirements.…”

Section: Statcom + Esmentioning

confidence: 99%

“…The SC has a much larger capacitance per cell than conventional capacitors, but it also has a higher equivalent series resistance (ESR), which means a low efficiency at fast charging/discharging compared to normal capacitors [45]. An SC is usually represented as a capacitor with a series resistance, as described in [28,44] and shown in Figure 11.…”

Section: Statcom + Esmentioning

confidence: 99%

“…The capability of active power generation is implemented by means of an SC and a DC-DC converter in the DC link of the STATCOM [23,27]. One of the main features of SCs is their high energy density and large time constants, which makes them very suitable for short-term applications, such as voltage dips, where the disturbances always last less than a second [21,28] (see Appendix 1 for commercially available SCs).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Obando-Montaño¹,

Carrillo²,

Cidrás³

et al. 2014

Energies

View full text Add to dashboard Cite

Fixed-speed wind generator (FSWG) technology has an important presence in countries where wind energy started to be developed more than a decade ago. This type of technology cannot be directly adapted to the grid codes, for example those requirements related to the immunity level under voltage dips. That behavior is typically referred as low-voltage ride through (LVRT), and it usually implies certain reactive and active power injection requirements, both during a voltage dip and during the voltage recovery. In this context, a review is presented of the LVRT exigencies present in some of the countries with the most advanced grid codes (Denmark, Germany, Spain and the United Kingdom). In this paper, the capabilities of STATCOM-based devices for fulfilling the LVRT requirements in FSWGs are analyzed. For this purpose, two technologies are considered: a STATCOM with a supercapacitor, which improves its energy storage features; and a STATCOM with a supercapacitor and a DC-DC converter, to achieve higher discharge levels.

show abstract

A new simplified model of Double-Layer Capacitors

Cited by 89 publications

References 1 publication

Supercapacitor leakage in energy-harvesting sensor nodes: Fact or fiction?

Supercapacitor leakage in energy-harvesting sensor nodes: Fact or fiction?

Storage Efficiency Optimization of a Supercapacitor Charged by a Photovoltaic Cell using Genetic Algorithm

A STATCOM with Supercapacitors for Low-Voltage Ride-Through in Fixed-Speed Wind Turbines

Contact Info

Product

Resources

About