Ultracapacitor energy storage for microgrid micro-generation

Binduhewa, Prabath; Renfrew, A.C.; Barnes, Mike

doi:10.1049/cp:20080525

Cited by 14 publications

(6 citation statements)

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“…The application can easily incorporate such new data using the present code, by including new device specification files. Other evolutions, such as new storage possibilities, including flow batteries [18] and capacitors [19], and intelligent management of combined solar/PV microgeneration systems [20] would require minor adjustments to the main application code.…”

Section: Discussionmentioning

confidence: 99%

A computational tool for evaluating the economics of solar and wind microgeneration of electricity

Kelleher

Ringwood

2009

Energy

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a b s t r a c tThis paper presents a method, implemented as a freely available computer programme, which is used to estimate the economics of renewable microgeneration of electricity from wind and solar energy sources. A variety of commercial small wind turbines and photovoltaic (PV) panels are considered and combined with raw energy data gathered from a variety of locations. Both residential and holiday home user profiles are available and options are selectable concerning feed-in tariffs (if available), government incentive schemes and the cost of capital borrowing. The configuration of the generation setup, which can consist of wind, PV and combination of wind/PV, is fully selectable by the user, with a range of appropriate default data provided. A numerical example, based on Irish data, is presented, which suggests that payback periods for solar and wind microgeneration systems can vary greatly (2.5-500 years), depending on the location, installation and economic variables.

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Section: Discussionmentioning

confidence: 99%

A computational tool for evaluating the economics of solar and wind microgeneration of electricity

Kelleher

Ringwood

2009

Energy

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“…Due to this, a converter is needed in order to control the output power ow to the storage element or to transmit it to the electrical grid network. In this case, the dc-dc converter can be used to control the power generated from the source and at the same time enable the maximum power point tracking [16,17,18,39,40]. For wind energy source, the output voltage from the generator contains variable magnitude current, voltage and frequency.…”

Section: Dc-dc Converter As Power Conditioning In Energy Conversionmentioning

confidence: 99%

“…If the battery is used, this converter is used to control the state of charge with a state control for optimum charging, while the ultracapacitor is used to regulate the dc-link voltage [40,71,79]. Other than these strategies it can also use the inner loop current control, the other voltage loop that been proposed in [67,72,76], the nite state machine in [64], or the dynamic evolution control in which the switching angle was calculated by [69]; these are able to control the power ows from the bidirectional converter.…”

Section: Energy Storage With Bidirectional Convertermentioning

confidence: 99%

Energy recovery from landing aircraft

Zulkifli¹

2012

2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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Currently, renewable energy sources are the main driver for future electricity generation. This trend is growing faster in the developed countries in order to reduce the green house e ect and also in response to the limited supply of oil, gas and coal which are currently the major sources for electric generation. For example, the main renewable energy sources are from wind energy and solar energy but these energies are only available to those countries that are exposed to these resources. In this thesis an alternative energy source is investigated where it can be generated from the moving objects or in form of kinetic energy. The idea is to convert the kinetic energy during landing aircraft into electrical energy which it can also be stored and transferred to the existing electrical network. To convert this kinetic energy to electrical energy, the linear generator (LG) and uncontrolled recti er have been used for energy conversion. The LG have been modelled in 3-phase model or in dq model and combined with the diode recti er that is used to generate the dc signal outputs. Due to the uncontrolled recti er the electrical outputs will have decaying amplitude along the landing time. This condition also happen to the LG outputs such as the force and the power output. In order to control these outputs the cascaded buck-boost converter has been used. This converter is responsible to control the output current at the recti er and also the LG output power during landing to more controllable power output. Here, the H ∞ current control strategy has been used as it o ers a very good performance for current tracking and to increase the robustness of the controller. During landing huge power is produced at the beginning and when the landing time is increased, the generated input power from LG is reduced to zero. Due to this, the energy storage that consits of ultracapacitor, bidirectional converter and boost converter are usedin order to store and to release the energy depends on the input power source and load grid power. The voltage proportional-integral (PI) control strategy has been used for both the converters. The last part is to transfer the energy from the source and at the ultracapacitor to the load by using the inverter as the processing device. The power controller and current controller are used at the inverter in order to control the power ow between the inverter and the grid. This is when the reference power is determined from the load power in order to generate the reference current by using the voltage oriented controller (VOC), while the H ∞ current controller is used to regulate the inverter current in order to inject the suitable amount of current that refer to the load power. Finally, a complete energy recovery system for landing aircraft with the grid connection have been put together to make the whole system to be as a new renewable energy source for the future electricity generation.

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“…This capacity is not constant and depends on the voltage across its terminals. For that reason, capacity is modeled as a constant value, C 0 , in parallel with a conventional capacitor, C u , showing a linear dependence on voltage, u, as shown in expressions (7) and ( 8).…”

Section: Supercapacitormentioning

confidence: 99%

“…As an example of application, Figure 4 shows a supercapacitor integrated in an electrical microgrid [7].…”

Section: Supercapacitormentioning

confidence: 99%

Energy storage technologies for electric applications

Martín¹,

Zamora²,

Martín³

et al. 2011

REPQJ

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Integration of renewable sources in electrical networks has increased dramatically in recent years. However, the power supplied by renewable energy sources is not as secure and easy to adjust to changes in demand, as the power supplied by traditional power systems. As a result, storage devices are also integrated into the electrical network in order to ensure reliability and quality in the performance of the power system. This paper presents the current state of development of various storage technologies proposed for use in electric power systems. Thus, characteristic expressions, specific and comparative data (in technical and economic terms) are shown.

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Ultracapacitor energy storage for microgrid micro-generation

Cited by 14 publications

References 0 publications

A computational tool for evaluating the economics of solar and wind microgeneration of electricity

A computational tool for evaluating the economics of solar and wind microgeneration of electricity

Energy recovery from landing aircraft

Energy storage technologies for electric applications

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