Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Simão, Mariana; Ramos, Helena M.

doi:10.3390/w12092457

Cited by 44 publications

(23 citation statements)

References 38 publications

(44 reference statements)

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“…Moreover, head losses due to pipes and fittings are also shown in Figure 5B that accounts for 3.9% of the served energy (see Figure 3A). The PHS models used in literature studies for feasibility and techno-economic optimization often overlooked them that may undermine the optimal sizing of RES (Makhdoomi and Askarzadeh, 2020;Simã o and Ramos, 2020;Al-Ghussain et al, 2020;Bhayo et al, 2020).…”

Section: Energy and Cost Balance For Off-grid Renewable Energy Systemmentioning

confidence: 99%

Quantifying techno-economic indicators' impact on isolated renewable energy systems

Javed

Ma²,

Mousavi

et al. 2021

iScience

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Addressing climate change with the rising global energy usage necessitates electricity sector decarbonization by rapidly moving toward flexible and efficient off-grid renewable energy systems (RESs). This paper analyzes the wind and solar micro-grids, with batteries and pumped hydro storage for a robust off-grid RES techno-economic operation, while considering diverse multi-objective optimization cases. This research has considered the RES variable operational losses in the developed methodology and relations between different indicators are evaluated, revealing a basic understanding between them. The results reveal that the reliability index is inversely related to the oversupply index, while directly related to the system self-sufficiency index. The cost of energy is more sensitive to technical indicators rather than the storage cost and so can be used as a primary monetary index. Energy and cost balance analysis showed that 16%-20% of the used energy was drained in RES operational losses, which were usually ignored in previous studies.

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Section: Energy and Cost Balance For Off-grid Renewable Energy Systemmentioning

confidence: 99%

Quantifying techno-economic indicators' impact on isolated renewable energy systems

Javed

Ma²,

Mousavi

et al. 2021

iScience

View full text Add to dashboard Cite

show abstract

“…The solar PV electricity output's estimation was based on a model established by the National Renewable Energy Laboratory (NREL) [36] using the formula in Equation (4).…”

Section: Objective Functionmentioning

confidence: 99%

“…Some studies proposed PHS-PV-wind systems as a way to increase solar energy penetration [19,21] particularly for small and isolated power systems in remote areas leading to an increase in capacity of 40% of the maximum wind penetration level during peak hours [21]. Simão and Ramos [36] investigated the combined generation of hydro, solar, and wind for the best challenge of energy storage flexibility, reliability, and sustainability. They found that the combined production showcased that technically the pumped hydro storage with wind and PV was the best solution to realize energy autonomy and improve its flexibility and dependability.…”

Section: Introductionmentioning

confidence: 99%

Complementary Optimization of Hydropower with Pumped Hydro Storage–Photovoltaic Plant for All-Day Peak Electricity Demand in Malawi

Chaima

Lian

et al. 2021

Energies

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Solar energy is currently dispatched ahead of other renewable energy sources. For the first time, this study presents a concept of exploiting temporary–periodical runoff discharge in the Shire River. Pumped hydro storage–photovoltaic plant (PHS–PV) was optimized to satisfy the all-day peak electricity demand in Malawi. The effect of varying the net head on the PHS system in both the generation and pumping operation modes was investigated. The bi-objective optimization evaluated the system reliability for day-time and night-time operation together with implied costs of investment for the whole system. The optimized system generated above 53% of added power as contrasted to single-source power generation from the existing hydropower plants. The estimated optimal capacities were 182 MWp (solar PV) and 86 MW (PHS plant). These additional optimal capacities achieved a 99.8% maximum system reliability (Loss of Power Supply Probability—LPSP—of 0.2%) and Levelized Cost of Energy—LCOE—of 0.13 USD/kWh. The overall investment cost of the PHS–PV system was estimated at 671.23 USD for an LPSP of 0.20%. The net head varies from 15.5 to 17.8 m with an impact on electricity generation of the PHS–PV system. More notably, the PHS–PV production matches with daily day-time and night-time peak loads and functions as a peaking plant.

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“…The result of a publication on electricity costs in India shows that MPS systems can be economically viable [17]. In contrast, other publications concerned with modelling small hydropower plants [18][19][20][21][22][23] in combination with photovoltaic (PV) systems [24], wind turbines [25], or both [26], leave open the question of how such a system can be operated economically.…”

Section: Introductionmentioning

confidence: 99%

Roadmap to Profitability for a Speed-Controlled Micro-Hydro Storage System Using Pumps as Turbines

et al. 2022

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Storage technologies are an emerging element in the further expansion of renewable energy generation. A decentralized micro-pumped storage power plant can reduce the load on the grid and contribute to the expansion of renewable energies. This paper establishes favorable boundary conditions for the economic operation of a micro-pump storage (MPS) system. The evaluation is performed by means of a custom-built simulation model based on pump and turbine maps which are either given by the manufacturer, calculated according to rules established in studies, or extended using similarity laws. Among other criteria, the technical and economic characteristics regarding micro-pump storage using 11 pumps as turbines controlled by a frequency converter for various generation and load scenarios are evaluated. The economical concept is based on a small company (e.g., a dairy farmer) reducing its electricity consumption from the grid by storing the electricity generated by a photovoltaic system in an MPS using a pump as a turbine. The results show that due to the high specific costs incurred, systems with a nominal output in excess of around 22 kW and with heads beyond approximately 70 m are the most profitable. In the most economical case, a levelized cost of electricity (LCOE) of 29.2 €cents/kWh and total storage efficiency of 42.0% is achieved by optimizing the system for the highest profitability.

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Hybrid Pumped Hydro Storage Energy Solutions towards Wind and PV Integration: Improvement on Flexibility, Reliability and Energy Costs

Cited by 44 publications

References 38 publications

Quantifying techno-economic indicators' impact on isolated renewable energy systems

Quantifying techno-economic indicators' impact on isolated renewable energy systems

Complementary Optimization of Hydropower with Pumped Hydro Storage–Photovoltaic Plant for All-Day Peak Electricity Demand in Malawi

Roadmap to Profitability for a Speed-Controlled Micro-Hydro Storage System Using Pumps as Turbines

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