Coordinated Control of PV-Ultracapacitor System for Enhanced Operation Under Variable Solar Irradiance and Short-Term Voltage Dips

Palla, Naresh; Kumar, Vishal

doi:10.1109/access.2020.3040058

Cited by 14 publications

(9 citation statements)

References 48 publications

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“…can be calculated straightforwardly. These three equations are the well-known formula relating i and u, the relation between the power and energy losses, and the thermal Equation (11). Therefore, the equations system to be solved is as follows:…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, SCs are increasingly used in a wide range of industrial pieces of equipment as the principal energy storage system or, more frequently, as a support to devices with a higher energy storage capacity, albeit dynamically poorer because of its slower response, as in the case of batteries and fuel cells [1][2][3][4][5]. Together with them, SCs make up hybrid energy storage units installed in electric vehicles [6][7][8][9], renewable energy systems [10][11][12][13], microgrids [14,15], and public transport vehicles [16]. This hybrid combination presents particular uses as well, such as public works machinery [17], military [18] and recreational vehicles [19], and even maritime transport [20].…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitors in Constant-Power Applications: Mathematical Analysis for the Calculation of Temperature

et al. 2021

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A set of analytical equations for the calculation of the temperature in supercapacitors operating in constant-power applications is presented in this paper. Although the main operation modes of supercapacitors are constant-current and constant-power charge and discharge, this study was focused on the latter, since both sources and loads act as constant-power systems in a wide range of power conversion facilities. The starting point of this study is the classical supercapacitor model based on electrical and thermal parameters provided by manufacturers or also obtained by experimental means. The proposed mathematical analysis is based on the so-called incomplete gamma function that presents two major advantages over previously existing methods. Firstly, it is not necessary to solve any differential equations system by means of numerical methods, which reduces the required computational effort. Secondly, no simplifications to relief the calculations are made in the computation of any variable. The new formulation renders valid solutions even for high-power demand situations. Moreover, the temperature of the supercapacitor can be expressed as a function of time or any other electrical variable in the charging and discharging processes. Therefore, the proposed formulas are especially remarkable for the electrical and thermal dimensioning of supercapacitors.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supercapacitors in Constant-Power Applications: Mathematical Analysis for the Calculation of Temperature

et al. 2021

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“…Cabrane, Z. [63] proposed SCs to compensate voltage drops during short periods time in soalr PV systems connected to the grid. A coordinated control algorithm is described to compensate the effects caused by the variable solar irradiance in PCC and results obtained from simulations are shown.…”

Section: Solar Pv Energymentioning

confidence: 99%

Advances in Supercapacitor Technology and Applications Ⅱ

2022

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“…Another limitation is the forecast horizon [11], long forecast horizon deprives solar predictability. Finally, the solar forecasting model may struggle to account for sudden operational changes or unexpected events that can affect solar energy generation [12].…”

Section: Introductionmentioning

confidence: 99%

Refining the Selection of Historical Period in Analog Ensemble Technique

del Pozo,

Kim,

Kim

2023

Energies

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A precise estimate of solar energy output is essential for its efficient integration into the power grid as solar energy becomes a more significant renewable energy source. Contrarily, the creation of solar energy involves fluctuation and uncertainty. The integration and operation of energy systems are complicated by the uncertainty in solar energy projection. As a post-processing technique to lower systematic and random errors in the operational meteorological forecast model, the analog ensemble algorithm will be introduced in this study. When determining the appropriate historical and predictive data required to use the approach, an optimization is conducted for the historical period in order to further maximize the capabilities of the analog ensemble. To determine statistical consistency and spread skill, the model is evaluated against both the raw forecast model and observations. The outcome lowers the uncertainty in the predicted data by demonstrating that statistical findings improve significantly even with 1-month historical data. Nevertheless, the optimization with a year’s worth of historical data demonstrates a notable decrease in the outcomes, limiting overestimation and lowering uncertainty. Specifically, analog ensemble algorithms calibrate analog forecasts that are equivalent to the latest target forecasts within a set of previous deterministic forecasts. Overall, we conclude that analog ensembles assuming a 1-year historical period offer a comprehensive method to minimizing uncertainty and that they should be carefully assessed given the specific forecasting aims and limits.

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Coordinated Control of PV-Ultracapacitor System for Enhanced Operation Under Variable Solar Irradiance and Short-Term Voltage Dips

Cited by 14 publications

References 48 publications

Supercapacitors in Constant-Power Applications: Mathematical Analysis for the Calculation of Temperature

Supercapacitors in Constant-Power Applications: Mathematical Analysis for the Calculation of Temperature

Advances in Supercapacitor Technology and Applications Ⅱ

Refining the Selection of Historical Period in Analog Ensemble Technique

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