scholarly journals Optimal operation management of grid-connected microgrids under uncertainty

2019 ◽  
Vol 16 (3) ◽  
pp. 1163 ◽  
Author(s):  
Surender Reddy Salkuti
Keyword(s):  
Hybrid System ◽  
Distribution System ◽  
Operating Cost ◽  
Energy Systems ◽  
Optimal Operation ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Power Exchange ◽  
Battery Energy ◽  
The Cost

<span>This paper proposes a new optimal operation of Microgrids (MGs) in a distribution system with wind energy generators (WEGs), solar photovoltaic (PV) energy systems, battery energy storage (BES) systems, electric vehicles (EVs) and demand response (DR). To reduce the fluctuations of wind, solar PV powers and load demands, the BES systems and DR are utilized in the proposed hybrid system. The detailed modeling of WEGs, solar PV units, load demands, BES systems and EVs has been presented in this paper. The objective considered here is the minimization of total operating cost of microgrid, and it is formulated by considering the cost of power exchange between the main power grid and microgrid, cost of wind and solar PV energy systems, cost of BES systems, EVs and the cost due to the DR in the system. Simulations are performed on a test microgrid, and they are implemented using GAMS software. Various case studies are performed with and without considering the proposed hybrid system.</span>

scholarly journals Optimal Operation of Microgrid considering Renewable Energy Sources, Electric Vehicles and Demand Response

2019 ◽  
Vol 87 ◽  
pp. 01007 ◽  
Author(s):  
Surender Reddy Salkuti
Keyword(s):  
Electric Vehicles ◽  
Hybrid System ◽  
Demand Response ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Operating Cost ◽  
Energy Systems ◽  
Optimal Operation ◽  
Solar Pv ◽  
The Cost

This paper proposes a new optimal operation of Microgrids (MGs) in a distribution system with wind energy generators (WEGs), solar photovoltaic (PV) energy systems, battery energy storage (BES) systems, electric vehicles (EVs) and demand response (DR). To reduce the fluctuations of wind, solar PV powers and load demands, the BES systems and DR are utilized in the proposed hybrid system. The detailed modeling of WEGs, solar PV units, load demands, BES systems and EVs has been presented in this paper. The objective considered here is the minimization of total operating cost of microgrid, and it is formulated by considering the cost of power exchange between the main power grid and microgrid, cost of wind and solar PV energy systems, cost of BES systems, EVs and the cost due to the DR in the system. Simulations are performed on a test microgrid, and they are implemented using GAMS software. Various case studies are performed with and without considering the proposed hybrid system.

Comparative Analysis of Off-grid Small Hydro-Solar PV-Diesel Hybrid System in South-west, Nigeria

2021 ◽  
Vol 6 (6) ◽  
pp. 74-81
Author(s):  
W. Ajeba ◽  
B. Adebanji ◽  
T. Fasina
Keyword(s):  
Comparative Analysis ◽  
Hybrid System ◽  
Power Supply ◽  
Rapid Development ◽  
Operating Cost ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Diesel Generator ◽  
Small Hydropower ◽  
South West

Reliable, efficient, and affordable power supply system is a necessary tool for rapid socio-economic development of any country. Power supply in Nigeria is grossly inadequate and inefficient. This work presented a comparison analysis of Off-Grid Small hydro-Solar Photovoltaic-Diesel Generator hybrid system in three selected locations in South-west, Nigeria. The selected locations are Molete (Oyo state), Abeokuta (Ogun state) and Ede (Osun state). The hydro data for the three locations were collected from their respective River Basin Development Authorities, while the solar data were obtained from National Aeronautics and Space Administration’s global satellite database. The hybrid components consisting of Small hydropower (SHP), Solar Photovoltaic (PV), Battery (BB) and Diesel Generator (DG) were modelled and run using Hybrid Optimization Model for Electric Renewable software with the stream flow, the solar radiation, load and the system components costs as inputs. The work also carried out a comparative analysis based on economic parameters-return on investment and simple payback period different from the conventional use of net present cost, cost of energy(COE) and operating cost. The optimal hybrid combinations for these areas were compared with the usage of autonomous DG. The most optimal hybrid combination for Molete and Ede is PV-BB-SHP System with COEs of $0.347/kWh and $0.161/kWh respectively. The most optimal configuration for Abeokuta is PV-DG-BB-SHP with COE of $0.290/kWh. The results obtained (based on economic and technical considerations) showed that the hybrid system is viable for these areas. The outcome of the research will serve as guide for the government and prospective investors in formulating effective policies towards rapid development of renewable energy technologies in these areas.

Modeling and Simulation Assessment of Solar Photovoltaic/Thermal Hybrid Liquid System Using TRNSYS

2015 ◽  
Vol 813-814 ◽  
pp. 700-706 ◽  
Author(s):  
R. Geetha ◽  
M.M. Vijayalakshmi ◽  
E. Natarajan
Keyword(s):  
Modeling And Simulation ◽  
Hybrid System ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Water Flow Rate ◽  
Exergy Efficiency ◽  
Hot Water ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Electrical Efficiency

The PV/T hybrid system is a combined system consisting of PV panel behind which heat exchanger with fins are embedded. The PV/T system consists of PV panels with a battery bank, inverter etc., and the thermal system consists of a hot water storage tank, pump and differential thermostats. In the present work, the modeling and simulation of a Solar Photovoltaic/Thermal (PV/T) hybrid system is carried out for 5 kWp using TRNSYS for electrical energy and thermal energy for domestic hot water applications. The prominent parameters used for determining the electrical efficiency, thermal efficiency, overall thermal efficiency, electrical thermal efficiency and exergy efficiency are the solar radiation, voltage, current, ambient temperature, mass flow rate of water, area of the PV module etc. The simulated results of the Solar PV/T hybrid system are analyzed for the optimum water flow rate of 25 kg/hr. The electrical efficiency, thermal efficiency, overall thermal efficiency, equivalent thermal efficiency, exergy efficiency are found to be 10%, 34%, 60%, 35% and 13% respectively. The average tank temperature is found to be 50°C.

scholarly journals Rural Electrification of Somalia Using WT-PV-DG-Battery Hybrid System

2021 ◽  
Author(s):  
Swathi Kumar ◽  
Richard Blanchard
Keyword(s):  
Hybrid System ◽  
Operating Cost ◽  
Cost Effective ◽  
Sub Saharan Africa ◽  
Diesel Generator ◽  
African Countries ◽  
Diesel Generators ◽  
Sub Saharan ◽  
The Cost ◽  
Wind Resource

Around 14% of the global population does not have access to electricity. About 95% of those are living in rural Sub-Saharan Africa. Often in these regions, diesel generators are the only source of electricity. The operating cost of these diesel generators is high. However, solar and wind energy are available in most of African countries. This study presents the analysis of designing an off-grid hybrid system with a wind turbine, PV, diesel generator, and battery to power a hospital, school, and 200 household village in four locations across Somalia. The research investigated the availability of wind-solar resources in selected locations. Designing of the system and economic-technical calculations were performed using HOMER. The selection of the optimum design was based on the Cost of Electricity and Net Present Cost. The results show that for Kabaal and Ceel Buur, a WT-PV-DG-Battery is the optimal system as the wind resource in these regions is high. For Saakov and Baki, a PV-DG-Battery system proves to be optimum as the wind resource is limited here. The study also evaluated the control strategy and proved that combined dispatch was the most cost-effective for these locations. The study concluded that hybrid systems are more economical than diesel systems.

scholarly journals Feasibility Study of Grid-Connected Solar Photovoltaic (PV) System for Primary School in Johor

2018 ◽  
Vol 11 (1) ◽  
pp. 233
Author(s):  
Siti Amely Jumaat ◽  
Adhwa Amsyar Syazwan Ab Majid ◽  
Chin Kim Gan ◽  
Mohd Noor Abdullah ◽  
Nur Hanis Radzi ◽  
...  
Keyword(s):  
Educational Institution ◽  
Project Planning ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
System Implementation ◽  
Huge Amount ◽  
Pv System ◽  
Pv Module ◽  
Solar Pv System ◽  
The Cost

This project aims to determine the potential of grid connected solar Photovoltaic (PV) implementation and project planning of solar PV System in school.  Generally, the educational institution used huge amount of electricity to operate so their monthly bills is expensive. Therefore, the project planning is necessary to determine the potential of solar PV system implementation. The project planning consists of the current electricity consumed by the school and the amount of 120W Monocrystalline PV module needed by them. The cost of project are determines to identify the initial cost of this project implementation. Lastly, analysis on the profit collected by SK Pintas Raya after 20 years of solar PV system implementation proved the importance of this project.

scholarly journals Neutral Current Compensation in grid tied Solar PV-BES Utility System using Four Leg VSC based DSTATCOM with SRF Control Strategy

2020 ◽  
Vol 9 (1) ◽  
pp. 2689-2697
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Neutral Current ◽  
Solar Pv ◽  
Static Synchronous Compensator ◽  
Synchronous Reference Frame ◽  
Power Injection ◽  
Utility System ◽  
Unbalanced Load ◽  
Battery Energy

In this proposed work, Synchronous Reference Frame (SRF) based control algorithm is used in Photovoltaic (PV) grid integration through Distribution Static Synchronous Compensator (DSTATCOM) with Battery Energy Storage (BES) system for simultaneous mitigation of power quality issues and for real power injection. In order to makeover the issues in the quality of power in the system by compensating neutral current, asymmetrical loads in the four wire three phase nonlinear and unbalanced load distribution system. The highest power of PV is tracked using Incremental Conductance (Inc) method and the voltage of DC bus is preserved by Bidirectional DC-DC Converter (BDDC). The proposed system works as PV-DSTATCOM mode which performs DSTATCOM operation by improving power quality with the capability of transferring the generated PV power to the consumers and Grid, and in BES-DSTATCOM mode it supplies power to the utility load. The proposed system is implemented and modeled for 11kV/440V utility system. The results have been obtained using sim power system tools in MATLAB/SIMULINK environment.

scholarly journals Design of Clean Steel Production with Hydrogen: Impact of Electricity System Composition

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8349
Author(s):  
Alla Toktarova ◽  
Lisa Göransson ◽  
Filip Johnsson
Keyword(s):  
Cost Minimization ◽  
Direct Reduction ◽  
Steel Production ◽  
Optimal Operation ◽  
Electricity Price ◽  
Solar Pv ◽  
Electricity System ◽  
Cost Efficient ◽  
The Cost ◽  
Hot Briquetted Iron

In Europe, electrification is considered a key option to obtain a cleaner production of steel at the same time as the electricity system production portfolio is expected to consist of an increasing share of varying renewable electricity (VRE) generation, mainly in the form of solar PV and wind power. We investigate cost-efficient designs of hydrogen-based steelmaking in electricity systems dominated by VRE. We develop and apply a linear cost-minimization model with an hourly time resolution, which determines cost-optimal operation and sizing of the units in hydrogen-based steelmaking including an electrolyser, direct reduction shaft, electric arc furnace, as well as storage for hydrogen and hot-briquetted iron pellets. We show that the electricity price following steelmaking leads to savings in running costs but to increased capital cost due to investments in the overcapacity of steel production units and storage units for hydrogen and hot-briquetted iron pellets. For two VRE-dominated regions, we show that the electricity price following steel production reduces the total steel production cost by 23% and 17%, respectively, as compared to continuous steel production at a constant level. We also show that the cost-optimal design of the steelmaking process is dependent upon the electricity system mix.

Sign in / Sign up

Export Citation Format

Share Document