Solar Pv Power Intermittency and Its Impacts on Power Systems – An Overview

Albadi, Mohammed

doi:10.24200/tjer.vol16iss2pp142-150

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…On the other hand, PV, and indeed other variable generation technologies such as wind, relies on the availability of the resource and thus is unable to produce constant and smooth power over time. Moreover, when the sun falls, electricity demand increases but PV output decreases, resulting in the famous duck curve phenomenon [14,15]. This fluctuating generation imposes significant reliability and economic challenges [16][17][18] for the electrical generation and transmission system [19] and for the distribution system [20].…”

Section: Introductionmentioning

confidence: 99%

Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios

2021

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In this study, we examine how Battery Storage (BES) and Thermal Storage (TES) combined with solar Photovoltaic (PV) and Concentrated Solar Power (CSP) technologies with an increased storage duration and rental cost together with diversification would influence the Moroccan mix and to what extent the variability (i.e., adequacy risk) can be reduced; this is done using recent (2013) cost data and under various penetration scenarios. To do this, we use MERRA-2 climate reanalysis to simulate hourly demand and capacity factors (CFs) of wind, solar PV and CSP without and with increasing storage capabilities—as defined by the CSP Solar Multiple (SM) and PV Inverter Loading Ratio (ILR). We adjust these time series to observations for the four Moroccan electrical zones over the year 2018. Our objective is to maximize the renewable (RE) penetration and minimize the imbalances between RE production and consumption considering three optimization strategies. We analyze mixes along Pareto fronts using the Mean-Variance Portfolio approach—implemented in the E4CLIM model—in which we add a maximum-cost constraint to take into account the different rental costs of wind, PV and CSP. We propose a method to calculate the rental cost of storage and production technologies taking into account the constraints on storage associated with the increase of SM and ILR in the added PV-BES and CSP-TES modules, keeping the mean solar CFs fixed. We perform some load bands-reduction diagnostics to assess the reliability benefits provided by each RE technology. We find that, at low penetrations, the maximum-cost budget is not reached because a small capacity is needed. The higher the ILR for PV, the larger the share of PV in the mix compared to wind and CSP without storage is removed completely. Between PV-BES and CSP-TES, the latter is preferred as it has larger storage capacity and thus stronger impact in reducing the adequacy risk. As additional BES are installed, more than TES, PV-BES is favored. At high penetrations, optimal mixes are impacted by cost, the more so as CSP (resp., PV) with high SM (resp., ILR) are installed. Wind is preferably installed due to its high mean CF compared to cost, followed by either PV-BES or CSP/CSP-TES. Scenarios without or with medium storage capacity favor CSP/CSP-TES, while high storage duration scenarios are dominated by low-cost PV-BES. However, scenarios ignoring the storage cost and constraints provide more weight to PV-BES whatever the penetration level. We also show that significant reduction of RE variability can only be achieved through geographical diversification. Technological complementarity may only help to reduce the variance when PV and CSP are both installed without or with a small amount of storage. However, the diversification effect is slightly smaller when the SM and ILR are increased and the covariances are reduced as well since mixes become less diversified.

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Section: Introductionmentioning

confidence: 99%

Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios

2021

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“…In terms of variability, it changes over time on hourly, daily, and seasonal scales, as well as regionally [16,17] for PV and CSP without storage. In addition to the fluctuation of solar radiation intensity (i.e., by clouds and shading of modules/collectors), the intermittency of the production from these technologies can lead to an oversupply at midday and a trough in the net load in the evening, which impact the system's ramping requirement [18] and the integration costs [19,20].…”

Section: Introductionmentioning

confidence: 99%

Adequacy of Renewable Energy Mixes with Concentrated Solar Power and Photovoltaic in Morocco: Impact of Thermal Storage and Cost

2020

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In this paper, we analyze the sensitivity of the optimal mixes to cost and variability associated with solar technologies and examine the role of Thermal Energy Storage (TES) combined to Concentrated Solar Power (CSP) together with time-space complementarity in reducing the adequacy risk—imposed by variable Renewable Energies (RE)—on the Moroccan electricity system. To do that, we model the optimal recommissioning of RE mixes including Photovoltaic (PV), wind energy and CSP without or with increasing levels of TES. Our objective is to maximize the RE production at a given cost, but also to limit the variance of the RE production stemming from meteorological fluctuations. This mean-variance analysis is a bi-objective optimization problem that is implemented in the Emathsizesmall4CLIMmathsizesmall modeling platform—which allows us to use climate data to simulate hourly Capacity Factors (CFs) and demand profiles adjusted to observations. We adapt this software to Morocco and its four electrical zones for the year 2018, add new CSP and TES simulation modules, perform some load reduction diagnostics, and account for the different rental costs of the three RE technologies by adding a maximum-cost constraint. We find that the risk decreases with the addition of TES to CSP, the more so as storage is increased keeping the mean capacity factor fixed. On the other hand, due to the higher cost of CSP compared to PV and wind, the maximum-cost constraint prevents the increase of the RE penetration without reducing the share of CSP compared to PV and wind and letting the risk increase in return. Thus, if small level of risk and higher penetrations are targeted, investment must be increased to install more CSP with TES. We also show that regional diversification is key to reduce the risk and that technological diversification is relevant when installing both PV and CSP without storage, but less so as the surplus of energy available for TES is increased and the CSP profiles flatten. Finally, we find that, thanks to TES, CSP is more suited than PV and wind to meet peak loads. This can be measured by the capacity credit, but not by the variance-based risk, suggesting that the latter is only a crude representation of the adequacy risk.

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“…Among these, hybrid solar-hydrogen systems (HSHSs) have emerged as promising candidates because they combine the sporadic nature of solar energy with the storage capabilities of hydrogen. This integration can potentially address the inherent intermittency of solar power [9][10][11][12] and facilitate the transition toward a more reliable and resilient energy infrastructure.…”

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confidence: 99%

Assessing the techno-economic feasibility of hybrid solar-hydrogen systems: A review of recent studies

Sarsah,

Sunnu,

Bawa

2024

iEnergy

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Transition toward a sustainable, low-carbon energy future requires innovative, integrated solutions. Hybrid solar-hydrogen systems (HSHSs), which combine solar energy harvesting and hydrogen production, have excellent prosepects to address challenges related to renewable energy generation, storage, and usage. This article presents an overview of the research on the technical and economic feasibility of HSHSs, aimed at comprehensively articulating their current state, notable advancements, and future research directions. It begins by elucidating solar energy principles and conversion methods and emphasizing the potential of solar energy for hydrogen production. This study then explores the definitions, components, and synergistic integration of HSHSs. Optimized energy conversion and storage methods for efficient hydrogen production and storage are also highlighted. This study reviews the techniques employed for techno-economic evaluations over the last six years, addressing challenges such as the intermittency of solar energy and the efficiency of hydrogen production technologies. This review of the ongoing research provides helpful insights into the technological and economic feasibility of HSHSs. This underscores the necessity of continuous research and development efforts to overcome existing challenges and unlock their full potential. These systems can play a vital role in achieving a cleaner and more resilient energy future by optimizing the system performance, reducing costs, and fostering supportive policy frameworks.

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Solar Pv Power Intermittency and Its Impacts on Power Systems – An Overview

Cited by 8 publications

References 29 publications

Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios

Utility-Scale PV-Battery versus CSP-Thermal Storage in Morocco: Storage and Cost Effect under Penetration Scenarios

Adequacy of Renewable Energy Mixes with Concentrated Solar Power and Photovoltaic in Morocco: Impact of Thermal Storage and Cost

Assessing the techno-economic feasibility of hybrid solar-hydrogen systems: A review of recent studies

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