Complementing hydroelectric power with floating solar PV for daytime peak electricity demand

Rauf, Huzaifa; Gull, Muhammad Shuzub; Arshad, Naveed

doi:10.1016/j.renene.2020.08.017

Cited by 71 publications

(26 citation statements)

References 25 publications

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“…Thus, typically within a day, the hydropower output from the cascade plants was decreased and, subsequently, conserved energy in the form of water storage in day-time hours when solar PV was in abundance. This conserved energy (water stored in the upper reservoir during daytime) could be utilized based on the request from the grid operator for night-time electricity dispatch when there is peak demand as in [47]. The combined complementary operation of cascade hydroelectric power with a PHS-PV system also minimized the stress on turbine generators of hydropower plants for electricity generation.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…Li et al [41] define uncertainty as an unanticipated change in demand and generation balance from what was forecasted, while variability is an anticipated change in the demand-generation balance. The increase in the penetration of VRES has necessitated the need to understand grid code constraints and electrical network parameters to maintain the integrity, efficiency, and reliability of the power system [42,43]. Large-scale penetration of VRES is one of the main challenges faced in modern electric power systems, owing to the complexities in the interactions between active and reactive power flows in the network, based on system design and connection characteristics, thus impacting dispatch operating costs, network losses and the voltage profile [43].…”

Section: Role Of Renewable-energy Hybrid Systems In Energy Transition (Climate Mitigation and Dispatch)mentioning

confidence: 99%

Hydro–Connected Floating PV Renewable Energy System and Onshore Wind Potential in Zambia

et al. 2021

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The adoption of a diversification strategy of the energy mix to include low-water consumption technologies, such as floating photovoltaics (FPV) and onshore wind turbines, would improve the resilience of the Zambian hydro-dependent power system, thereby addressing the consequences of climate change and variability. Four major droughts that were experienced in the past fifteen years in the country exacerbated the problems in load management strategies in the recent past. Against this background, a site appraisal methodology was devised for the potential of linking future and existing hydropower sites with wind and FPV. This appraisal was then applied in Zambia to all the thirteen existing hydropower sites, of which three were screened off, and the remaining ten were scored and ranked according to attribute suitability. A design-scoping methodology was then created that aimed to assess the technical parameters of the national electricity grid, hourly generation profiles of existing scenarios, and the potential of variable renewable energy generation. The results at the case study site revealed that the wind and FPV integration reduced the network’s real power losses by 5% and improved the magnitude profile of the voltage at nearby network buses. The onshore wind, along with FPV, also added 341 GWh/year to the national energy generation capacity to meet the 4.93 TWh annual energy demand, in the presence of 4.59 TWh of hydro with a virtual battery storage potential of approximately 7.4% of annual hydropower generation. This was achieved at a competitive levelized cost of electricity of GBP 0.055/kWh. Moreover, floating PV is not being presented as a competitor to ground-mounted systems, but rather as a complementary technology in specific applications (i.e., retrofitting on hydro reservoirs). This study should be extended to all viable water bodies, and grid technical studies should be conducted to provide guidelines for large-scale variable renewable energy source (VRES) integration, ultimately contributing to shaping a resilient and sustainable energy transition.

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“…The block diagram of overall system has been depicted in Figure 1. Modeling of different components of this system is explained next [15].…”

Section: Modeling Of the Systemmentioning

confidence: 99%

Voltage profile improvement of weak grid with solar PV integration

2021

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The objective of this paper is to improve the voltage profile of the grid in pertinence to grid due to power injection from distributed solar photovoltaic (PV) arrays. Weak grids are modeled as worldwide adaptation of net metering, transactive energy systems, and the possibility of further deterioration of power quality with higher grid penetration. In this paper, a solar PV integrated weak distribution grid modelled as the PV arrays being frequently connected in rural areas, due to various reasons like cheap real estate and lack of accessibility. In this paper, three case studies of PV generation are simulated, i.e., scheduled solar PV generation less than load requirement, PV generation equal to load requirement, and PV generation more than load requirement, by considering the daily solar irradiation and load demand profiles of a residential area under study.

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Complementing hydroelectric power with floating solar PV for daytime peak electricity demand

Cited by 71 publications

References 25 publications

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

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

Hydro–Connected Floating PV Renewable Energy System and Onshore Wind Potential in Zambia

Voltage profile improvement of weak grid with solar PV integration

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