Optimal power dispatch of a grid-interactive micro-hydrokinetic-pumped hydro storage system

Koko, Sandile Phillip; Kusakana, K.; Vermaak, H.J.

doi:10.1016/j.est.2018.02.013

Cited by 42 publications

(16 citation statements)

References 28 publications

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“…Observing the different Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) linked to the overall optimisation model that is developed, the problem may be qualified as constrained non-linear optimisation or non-linear programming. Several solvers and their areas of application may be found in reference.…”

Section: Solver Selectionmentioning

confidence: 99%

Optimal peer‐to‐peer energy sharing between grid‐connected prosumers with different demand profiles and renewable energy sources

Kusakana

2021

IET Smart Grid

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A model is developed to optimise power sharing between two grid-connected prosumers that incorporates photovoltaic and wind energy conversion systems operating in a peerto-peer (P2P) energy-sharing arrangement. The city of Durban, South Africa, where wind and solar resources are abundant, is selected as a case study to analyse power flows between selected prosumers. The model optimally manages power flows among micro renewables-based energy generators while minimising the total cost of energy purchased from the power utility under a time-variable pricing structure. To evaluate the economic feasibility of the suggested peer-to-peer energy-sharing arrangement, a lifecycle cost analysis is conducted to determine when the proposed system will break even, in terms of money spent less achievable salvage value, using the suggested prosumers instead of providing power exclusively from the grid to satisfy load demands. The analysis predicts that the breakeven point will occur after 4.3 years at $13,500, with a projected saving at the end of the 20-year lifecycle of approximately $60,536.82, or 47.42%. Furthermore, the 'true' payback period method is used to assess the economic behaviour of the proposed system with P2P energy-sharing capabilities and indicates that the total investment cost would be recovered in 8.76 years. These results show that the optimally controlled peerto-peer energy-sharing scheme is economically feasible in the South African context and may be applied in any global location with similar operating conditions. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Solver Selectionmentioning

confidence: 99%

Optimal peer‐to‐peer energy sharing between grid‐connected prosumers with different demand profiles and renewable energy sources

Kusakana

2021

IET Smart Grid

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“…Another type of mechanical energy storage is the pumped hydro energy storage having features such as flexibility, long-life cycle, and low maintenance cost. It is composed of a pumping system, upper reservoir, and hydro turbine [56]. The excess energy containing water is pumped to the upper reservoir and used when needed.…”

Section: Pumped Hydro Energy Storage (Phess)mentioning

confidence: 99%

Güneş Enerjisi Depolama Malzemelerinin Bugünü, Yarını ve Geleceği

2021

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Increasing global energy demand and environmental concerns due to the emissions of greenhouse gases as by-products of fossil fuel consumption have led to the exploration of the potential of renewable energy sources such as solar, biofuel, hydrothermal energy etc. Among these, solar thermal energy is becoming a highly desirable source of renewable energy because of the widespread availability of solar radiations and the progress achieved in its efficiency and effectiveness.Different forms of thermal storage especially thermochemical storage (TCS), latent heat storage (LHS), and sensible heat storage (SHS) have been reported so far. Likewise, there are studies in the literature which also focus on the main mechanical energy storage systems. In addition, electrochemical energy storage devices like batteries are increasingly gaining popularity due to their highly efficient energy conversion values. Recently investigated materials for various solar storage forms show great potential as the future storage materials since theoretical limits are not reached yet; however, they are still in the experimental stage and this paper presents glimpse of those potential studies.

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“…Some research on the functioning, optimization, and economic practicability of hybrid electricity production systems with or without battery loading has been conducted 1,3,10‐33 . Rahman et al 1 identified the application of a hybrid power system for the rural community of Sandy Lake in Canada and proposed the hybrid energy arrangement for different penetration levels of renewable energy.…”

Section: Introductionmentioning

confidence: 99%

Optimal sizing of off‐grid hydrokinetic‐based hybrid renewable power systems for a house load demand

Gökçek

Kale

2021

Int J Energy Res

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Summary The usage of stand‐alone power systems represents an excellent choice for remote communities that are impossible to couple to the electricity distribution network practicably. The current research aims to design a no grid tied hybrid system on the basis of a PV‐wind turbine‐hydrokinetic turbine and diesel generator, for the purpose of meeting the electricity needs of a house near the Seyhan River, Turkey. A software that performs hybrid optimization of systems that can generate energy using different energy sources was utilized for modeling the operation of systems and identifying the appropriate architecture. In the current research, simulations were carried out for eight different (off‐grid) power systems. The best optimized off‐grid hybrid power system comprises a photovoltaic array of 7.87 kW, two wind turbines, one hydrokinetic turbine, a diesel generator of 7 kW, lead‐acid batteries of 49 kWh, and a converter of 4.95 kW. The results of the present research demonstrated that the total net present cost was $161 327.08, while the levelized cost of electricity was $0.609/kWh for the optimized system. Furthermore, the renewable usage fraction and carbon dioxide emissions are 26.4% and 838.63 kg/year, respectively. In accordance with the simulation findings, the wind‐hydrokinetic power system has higher levelized cost of electricity and total net present cost in comparison with other power generation systems.

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Optimal power dispatch of a grid-interactive micro-hydrokinetic-pumped hydro storage system

Cited by 42 publications

References 28 publications

Optimal peer‐to‐peer energy sharing between grid‐connected prosumers with different demand profiles and renewable energy sources

Optimal peer‐to‐peer energy sharing between grid‐connected prosumers with different demand profiles and renewable energy sources

Güneş Enerjisi Depolama Malzemelerinin Bugünü, Yarını ve Geleceği

Optimal sizing of off‐grid hydrokinetic‐based hybrid renewable power systems for a house load demand

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