scholarly journals Study of Hybrid PV-Wind Energy System to Isolated Micro-grid

2015 ◽  
Vol 16 (2) ◽  
pp. 221
Author(s):  
Samir M. Dawoud ◽  
Xiangning Lin
Keyword(s):  
Renewable Energy Sources ◽  
Optimization Technique ◽  
Optimal Solution ◽  
Energy System ◽  
Hybrid Microgrid ◽  
Load Demand ◽  
Cost Of Energy ◽  
Wind Energy System ◽  
One Year ◽  
The Cost

The optimal sizing of the isolated hybrid microgrid using an optimization technique was proposed. The hybrid system features WT, PV and conversion systems were used to feed the electrical load demand. A HOMER software was used to model system performance during a time of one year, considering Sensitivity variations in both the availability of renewable energy sources and variations in the load demand. The optimal solution was obtained with respect to decrease the cost of energy (COE) and the loss of power supply probability (LPSP) over a project lifetime of 25 years to improve the isolated operation of the microgrid. The aim of this study is to investigate an optimum combination of different energy systems which can supply electricity to a rural area in Egypt. The results show the COE for the optimal model was found 0.139 $/kWh which is less than half of the PV or WT system.

scholarly journals Research Results for the Tornado Wind Energy System: Analysis and Conclusions

1985 ◽  
Vol 107 (1) ◽  
pp. 78-87
Author(s):  
E. W. Jacobs
Keyword(s):  
Wind Energy ◽  
System Analysis ◽  
Energy System ◽  
Power Coefficient ◽  
Research Results ◽  
Air Supply ◽  
Cost Of Energy ◽  
Energy System Analysis ◽  
Wind Energy System ◽  
The Cost

The Tornado Wind Energy System (TWES) concept utilizes a wind-driven vortex confined by a hollow tower to create a low-pressure core intended to serve as a turbine exhaust reservoir. The turbine inlet flow is provided by a separate ram air supply. Numerous experimental and analytical research efforts have investigated the potential of the TWES as a wind energy conversion system (WECS). The present paper summarizes and analyzes much of the research to date on the TWES. A simplified cost analysis incorporating these research results is also included. Based on these analyses, the TWES does not show any significant promise of improving on either the performance or the cost of energy attainable by conventional WECS. The prospects for achieving either a system power coefficient above 0.20 or a cost of energy less than $0.50/kWh (1979 dollars) appear to be poor.

scholarly journals Techno-Economic Feasibility Study of Investigation of Renewable Energy System for Rural Electrification in South Algeria

2018 ◽  
Vol 8 (5) ◽  
pp. 3421-3426 ◽  
Author(s):  
F. Chermat ◽  
M. Khemliche ◽  
A. E. Badoud ◽  
S. Latreche
Keyword(s):  
Greenhouse Gas Emission ◽  
Electrical Energy ◽  
Energy System ◽  
Economic Feasibility ◽  
Maintenance Cost ◽  
Management Algorithm ◽  
Cost Of Energy ◽  
The Cost ◽  
Operation And Maintenance Cost ◽  
Different Sources

This work aims to consider the combination of different technologies regarding energy production and management with four possible configurations. We present an energy management algorithm to detect the best design and the best configuration from the combination of different sources. This combination allows us to produce the necessary electrical energy for supplying habitation without interruption. A comparative study is conducted among the different combinations on the basis of the cost of energy, diesel consumption, diesel price, capital cost, replacement cost, operation, and maintenance cost and greenhouse gas emission. Sensitivity analysis is also performed.

Methodology for optimal design and control of wind energy system based on simplifying assumptions

2021 ◽  
pp. 0309524X2110667
Author(s):  
Souhir Tounsi
Keyword(s):  
Wind Energy ◽  
Energy System ◽  
Chain Structure ◽  
Control Algorithms ◽  
Simulation Environment ◽  
Wind Energy Generation ◽  
Wind Energy System ◽  
Simplifying Assumptions ◽  
The Cost ◽  
And Control

The study presented in this paper concerns the development of a new methodology for design and controlling a wind energy generation chain. This methodology is based on combined Analytical-Finite Element-Experimental method. This type of converter chosen is an AC-DC inverter with IGBTs to improve the robustness of the power chain structure. It offers a reduction of the cost of the power chain and the improvement of the performances of the global studied system, as the control at power factor equal to unity and providing an electromagnetic torque which is added to the useful torque in order to extract the maximal energy. The control algorithms permit to regulate Le charging voltage and current in their rated values considered as optimal battery charging voltage and current. The global model of the power chain is implemented under the Matlab-Sumilink simulation environment for performance and efficiency analysis.

scholarly journals Analysis of Techno-Economic-Environmental Suitability of an Isolated Microgrid System Located in a Remote Island of Bangladesh

2020 ◽  
Vol 12 (7) ◽  
pp. 2880 ◽  
Author(s):  
Hasan Masrur ◽  
Harun Or Rashid Howlader ◽  
Mohammed Elsayed Lotfy ◽  
Kaisar R. Khan ◽  
Josep M. Guerrero ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Economic Feasibility ◽  
Added Value ◽  
Renewable Energy Resources ◽  
Hybrid Microgrid ◽  
Load Demand ◽  
Cost Of Energy ◽  
Remote Island ◽  
Heavy Burden ◽  
Energy Options

Following a rise in population, load demand is increasing even in the remote areas and islands of Bangladesh. Being an island that is also far from the mainland of Bangladesh, St. Martin’s is in need of electricity. As it has ample renewable energy resources, a renewable energy-based microgrid system seems to be the ultimate solution, considering the ever-increasing price of diesel fuel. This study proposes a microgrid system and tests its technical and economic feasibility in that area. All possible configurations have been simulated to try and find the optimal system for the island, which would be eco-friendly and economical with and without considering renewable energy options. The existing power supply configuration has also been compared to the best system after analyzing and investigating all technical and economic feasibility. Sensitivity and risk analysis between different cases provide added value to this study. The results show that the current diesel-based system is not viable for the island’s people, but rather a heavy burden to them due to the high cost of per unit electricity and the net present cost. In contrast, a PV /Wind/Diesel/Battery hybrid microgrid appeared to be the most feasible system. The proposed system is found to be around 1.5 times and 28% inexpensive considering the net present cost and cost of energy, respectively, with a high (56%) share of renewable energy which reduces 23% carbon dioxide.

Hybrid Distributed Power Generation for an Isolated Rural Settlement in Masirah Island, Oman

2011 ◽  
Author(s):  
Saleh Al Saadi ◽  
Moncef Krarti
Keyword(s):  
Power Systems ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Small Community ◽  
Solar Pv ◽  
Cost Of Energy ◽  
Storage Batteries ◽  
Electrical Generation ◽  
The Cost

This paper summarizes the findings from a feasibility study of using renewable energy sources in combination with conventional power systems to meet the electrical requirements for an isolated island of Masirah in Oman. The study has been conducted to determine the best hybrid system to generate electrical energy needed for a small community of 500 residential buildings. A series of a simulation analyses have been carried out to evaluate and optimize different distribution technologies including photovolatics, wind and diesel for electrical generation in combination with storage batteries. It was found that the cost of energy could be reduced by as much as 48% compared to the cost for the baseline generation system currently used in the Masirah Island (i.e. diesel-driven generators). In particular, it was found that wind turbines in combination with storage batteries have a great impact in reducing the cost of generating electrical energy for the residential community. Moreover, solar PV panels were found unattractive under the current diesel price rates but could potentially become viable if the diesel prices increase. The paper outlines an optimal design for generating electricity for the community at lowest cost while minimizing carbon emissions.

Optimal Setpoints for HVAC Systems via Iterative Cooperative Neighbor Communication

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Matthew Elliott ◽  
Bryan P. Rasmussen
Keyword(s):  
Energy Savings ◽  
Optimization Technique ◽  
Optimal Solution ◽  
Hvac Systems ◽  
Global Optimum ◽  
Cost Information ◽  
Steady State Condition ◽  
Air Conditioning Systems ◽  
The Cost ◽  
Dynamic Subsystem

Heating, ventilation, and air conditioning systems in large buildings frequently feature a network topology wherein the outputs of each dynamic subsystem act as disturbances to other subsystems. The distributed optimization technique presented in this paper leverages this topology without requiring a centralized controller or widespread knowledge of the interaction dynamics between subsystems. Each subsystem's controller calculates an optimal steady state condition. The output corresponding to this condition is then communicated to downstream neighbors only. Similarly, each subsystem communicates to its upstream neighbors the predicted costs imposed by the neighbors' own calculated outputs. By judicious construction of the cost functions, all of the cost information is propagated through the network, allowing a Pareto optimal solution to be reached. The novelty of this approach is that communication between all plants is not necessary to achieve a global optimum. Since each optimizer does not require knowledge of its neighbors' dynamics, changes in one controller do not require changes to all controllers in the network. Proofs of convergence to Pareto optimality under certain conditions are presented, and convergence under the approach is demonstrated with a simulation example. The approach is also applied to a laboratory-based water chiller system; several experiments demonstrate the features of the approach and potential for energy savings.

scholarly journals Fuel Cell Electric Vehicle as a Power Plant: Techno-Economic Scenario Analysis of a Renewable Integrated Transportation and Energy System for Smart Cities in Two Climates

2019 ◽  
Vol 10 (1) ◽  
pp. 143 ◽  
Author(s):  
Vincent Oldenbroek ◽  
Gilbert Smink ◽  
Tijmen Salet ◽  
Ad J.M. van Wijk
Keyword(s):  
Fuel Cell ◽  
Urban Areas ◽  
Distribution Systems ◽  
Technology Development ◽  
Smart Cities ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Transportation Systems ◽  
Development Scenarios ◽  
Cost Of Energy

Renewable, reliable, and affordable future power, heat, and transportation systems require efficient and versatile energy storage and distribution systems. If solar and wind electricity are the only renewable energy sources, what role can hydrogen and fuel cell electric vehicles (FCEVs) have in providing year-round 100% renewable, reliable, and affordable energy for power, heat, and transportation for smart urban areas in European climates? The designed system for smart urban areas uses hydrogen production and FCEVs through vehicle-to-grid (FCEV2G) for balancing electricity demand and supply. A techno-economic analysis was done for two technology development scenarios and two different European climates. Electricity and hydrogen supply is fully renewable and guaranteed at all times. Combining the output of thousands of grid-connected FCEVs results in large overcapacities being able to balance large deficits. Self-driving, connecting, and free-floating car-sharing fleets could facilitate vehicle scheduling. Extreme peaks in balancing never exceed more than 50% of the available FCEV2G capacity. A simple comparison shows that the cost of energy for an average household in the Mid Century scenario is affordable: 520–770 €/year (without taxes and levies), which is 65% less compared to the present fossil situation. The system levelized costs in the Mid Century scenario are 71–104 €/MWh for electricity and 2.6–3.0 €/kg for hydrogen—and we expect that further cost reductions are possible.

scholarly journals Design and Simulation of Hybrid System using Cuckoo MPPT Technique

2019 ◽  
Vol 8 (6) ◽  
pp. 3078-3086
Keyword(s):  
Renewable Energy Sources ◽  
Energy System ◽  
Control Technique ◽  
Main Theme ◽  
Flexible System ◽  
Extra Energy ◽  
Early Afternoon ◽  
Wind Energy System ◽  
Distribution Generation ◽  
Power Management Unit

In contrast to present scenario, the renewable energy sources are accessible at no expense and produce power environmental friendly. Around early afternoon the WPS fulfills its heap and gives extra energy to the capacity or to the grid. On location energy generation is without a doubt went with minimization of ecological contamination, decrease of misfortunes in power system transmission and distribution. The main theme of this paper is to propose a demonstrating and planning of grid interfaced hybrid solar-wind energy system. This is an issue particularly in little powerful system because of the limitation on the inverter markets. Inverters which are used in these sorts of energy systems work on grid or off grid. In this investigation, a novel power the board methodology has been created by structuring a wind-PV mixture system to work both as a self-ruling system and as a grid-associated system. The structured Power Management Unit performs estimation from different focuses in the system and as per this estimation; it gives a compelling energy exchange to burdens and grid. The steadiness of the smaller scale grid, power quality and voltage direction is checked by Matlab and test results. This paper also presents a concept for effective utilization of Distribution Generation systems as a part of smart grid environment, to improve the system reliability by providing effective generation under islanding mode, and also to provide controlling services in the grid-tied mode. To meet this limitations, this proposed flexible system is implemented a control technique with power-voltagecurrent parameters.

scholarly journals Optimal Sizing of PV/Wind/Battery Hybrid Microgrids Considering Lifetime of Battery Banks

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6655
Author(s):  
Ning Zhang ◽  
Nien-Che Yang ◽  
Jian-Hong Liu
Keyword(s):  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Energy Sources ◽  
Optimal Sizing ◽  
Multi Objective ◽  
Hybrid Microgrid ◽  
Scheduling Model ◽  
Ess Model ◽  
The Cost

Power system scheduling of renewable energy sources has been studied extensively due to the severe increase in pollution caused by conventional energy sources. In this study, a multi-objective scheduling model of a hybrid microgrid is proposed to minimize the cost of hybrid microgrids and maximize the power supply reliability. The main power generation units such as the wind turbines, photovoltaic (PV) cells, and battery banks are used in this hybrid microgrid. In this study, the optimal sizing of PV panels and battery banks are obtained using multi-objective particle swarm optimization (MOPSO) for the proposed multi-objective scheduling model. The lifetime of battery banks is considered in the energy storage system (ESS) model. Finally, the practicality of the scheduling model proposed in this study is verified by four examples.

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