scholarly journals An Improved Dispatch Strategy of a Grid-Connected Hybrid Energy System with High Penetration Level of Renewable Energy

2014 ◽  
Vol 2014 ◽  
pp. 1-18
Author(s):  
Yan Zhang ◽  
Jie Meng ◽  
Bo Guo ◽  
Tao Zhang
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Fast Response ◽  
Time Shift ◽  
Frequency Regulation ◽  
Hybrid Energy ◽  
High Penetration ◽  
Battery Energy

As more and more renewable energy sources (RES) integrated into the conventional distribution system, how to make the current electric grid more reliable and efficient is becoming an important topic the world must face. In order to achieve these goals, grid-connected hybrid energy systems (HES) which contain battery energy storage systems (BESS) and many other advanced technologies have been developed and applied. Many benefits of BESS, such as high density of energy and power, have fast response in energy time-shift, frequency regulation, and so on. This paper focuses on the fluctuation alleviation and power quality improvement of grid-connected HES with high penetration level of RES. A multistage dispatch strategy of BESS for HES is proposed in this paper to mitigate the randomness and intermittence of the power flowed in HES because of high penetration level of RES integration. Four other conventional strategies are also discussed for evaluating the performance of the method proposed in this paper. Detailed cases and corresponding discussions are implemented, and the results show that the method proposed in this paper is more effective and robust than the other conventional strategies.

scholarly journals Power Balance Management of an Autonomous Hybrid Energy System Based on the Dual-Energy Storage

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4690
Author(s):  
Sergey Obukhov ◽  
Ahmed Ibrahim ◽  
Mohamed A. Tolba ◽  
Ali M. El-Rifaie
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Power Supply ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy System ◽  
Power Balance ◽  
Hybrid Energy ◽  
Hybrid Power ◽  
High Penetration

The urgent task of modern energy is to ensure reliable and efficient power supply to consumers, even those located in remote, far end places. A hybrid energy system with renewable energy sources is a promising way to ensure such a process. A characteristic feature of the modes of such systems, especially with high penetration levels of renewable energy sources, is the presence of ripples in the charge–discharge currents of the batteries used as energy storage devices. Batteries operation with such current fluctuations leads to rapid degradation of its characteristics as well as a reduction in its lifetime. Furthermore, it leads to a decrease in the reliability of the power supply system and an increase in the cost of generated electricity. A significant drawback of hybrid systems built according to well-known standard schemes is the inefficient use of the primary renewable energy, which is especially critical for energy systems located geographically in areas with severe climatic conditions. This article proposes a new construction method and an algorithm for controlling the modes of hybrid energy systems based on a dual-circuit energy storage device, which increases their reliability and energy efficiency. The prominent outcomes of operating modes of a hybrid power plant with a high penetration of renewable sources are presented, which proves that the proposed method of construction and the proposed control algorithm provide reliable and efficient control of the power balance of the hybrid power system in all possible operating conditions. In addition, the overall efficiency of the proposed renewable energy system is increased from 28% to 60% compared to standard hybrid power plants.

scholarly journals ENHANCING WIND/FUEL CELL HYBRID ENERGY SYSTEM

2013 ◽  
pp. 176-180
Author(s):  
PAVAN R. PADGHAN ◽  
P.K. KATTI
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Wind Turbine ◽  
Cell Hybrid ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Sustained Load ◽  
Hybrid Energy System ◽  
Hybrid Energy ◽  
Fuel Cell Hybrid

This paper describe of a renewable energy based hybrid energy system with MATLAB implementation results. In order to meet sustained load demand during varying natural conditions, different renewable energy sources need to be integrated with each other. This paper focuses on the combination of wind/fuel cell hybrid energy system. As wind turbine output power varies with wind speed & FC systems can be integrated to ensure that the system performs under all conditions. The result show that the proposed hybrid energy system can be tolerate the rapid change in natural condition and suppress the effect of the fluctuation on the voltage wind turbine the acceptable range.

Optimization of Hybrid Renewable Energy System (HRES) Using Modified Evolutionary Strategy for Cost Minimization

2015 ◽  
Vol 785 ◽  
pp. 546-550
Author(s):  
Ahmad Syazwan Aznan ◽  
Ismail Musirin ◽  
Siti Aliyah Mohd Saleh ◽  
Nur Azzammudin Rahmat
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Cost Minimization ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Evolutionary Strategy ◽  
Hybrid Renewable Energy System ◽  
Renewable Energy System ◽  
The Cost ◽  
Hybrid Renewable Energy

Recently, renewable energy has been in place to cater the depreciation of main energy. The presence of renewable energy sources can be made in hybrid to satisfy the demand in the distribution system. Nevertheless, the growth in number for renewable energy could lead to cost increment. This paper presents the optimization process of Hybrid Renewable Energy System (HRES) using Modified Evolutionary Strategy (ES) technique for cost minimization. The study involves the development of optimization engine for modified ES in order to solve the cost minimization of HRES. The improved version of ES is expected to address the computation burden experienced by the traditional ES technique. Results obtained from the implementation of the modified ES managed to reveal that its implementation is worth in terms of minimizing the cost

scholarly journals Energy Management Optimization Techniques for Hybrid Renewable Energy Systems

2020 ◽  
Vol 8 (6S) ◽  
pp. 89-94
Keyword(s):  
Renewable Energy ◽  
Smart Grid ◽  
Energy Management ◽  
Renewable Energy Sources ◽  
Supply And Demand ◽  
Energy System ◽  
Optimization Techniques ◽  
Energy Sources ◽  
Hybrid Energy ◽  
Management Optimization

A Smart Grid is a reviving structure of traditional centralized power sector which incorporates smart software and hardware technologies. It provides communication among the prosumers and consumers to achieve sustainability and reliability in an economical way. A microgrid (MG) is a unit of smart grid which consists of distributed energy sources with renewable energy sources, energy storage units and variable loads. Because of stochastic nature of renewable energy sources to maintain balance between supply and demand a novel hybrid energy management controller need to be devised. This paper presents various operational objectives and constraints associated with energy management system of hybrid energy system. Also it compares and discusses various optimization algorithms in the literature.

scholarly journals Review of Optimization Techniques for Sizing Renewable Energy Systems

2019 ◽  
Vol 8 (1) ◽  
pp. 13-30 ◽  
Author(s):  
C. Mekontso ◽  
Abdulkarim Abubakar ◽  
S. Madugu ◽  
O. Ibrahim ◽  
Y. A. Adediran
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Optimization Techniques ◽  
Weather Data ◽  
Energy Sources ◽  
Hybrid Energy ◽  
Load Demand ◽  
Global Warning

The growing evidence of the global warning phenomena and the rapid depletion of fossil fuels have drawn the world attention to the exploitation of renewable energy sources (RES). However standalone RES have been proven to be very expensive and unreliable in nature owing to the stochastic nature of the energy sources. Hybrid energy system is an excellent solution for electrification of areas where the grid extension is difficult and not economical. One of the main attribute of hybridising is to be able to optimally size each RES including storages with the aim of minimizing operation costs while efficiently and reliably responding to load demand. Hybrid RES emerges as a trend born out of the need to fully utilize and solve problems associated with the reliability of RES. This paper present a review of techniques used in recent optimal sizing of hybrid RES. It discusses several methodologies and criteria for optimization of hybrid RES. The recent trend in optimization in the field of hybrid RES shows that bio-inspired techniques may provide good optimization of system without extensive long weather data.

Optimum Design of Standalone Hybrid Energy Systems Minimizing Waste of Renewable Energy

2016 ◽  
Author(s):  
A. T. D. Perera
Keyword(s):  
Renewable Energy ◽  
Fuel Consumption ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy System ◽  
Energy Sources ◽  
Solar Pv ◽  
Energy Potential ◽  
Hybrid Energy ◽  
Hybrid Energy Systems

The importance of integrating renewable energy sources into standalone energy systems is highlighted in recent literature. Maintaining energy efficiency is challenging in designing such hybrid energy systems (HES) due to seasonal variation of renewable energy potential. This study evaluates the limitations in minimizing the losses in renewable energy generated mainly due to energy storage limitations and minimizing fuel consumption of the internal combustion generator (ICG). A standalone hybrid energy system with Solar PV (SPV), wind, battery bank and an ICG is modeled and optimized in this work. Levelized Energy Cost (LEC), Waste of Renewable Energy (WRE) and Fuel Consumption (FC) are taken as objective functions. Results highlight the importance of considering WRE as an objective function which increase the mix of energy sources that can help to increase the reliability of the system.

scholarly journals Full-Scale Implementation of RES and Storage in an Island Energy System

Inventions ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 52
Author(s):  
Konstantinos Fiorentzis ◽  
Yiannis Katsigiannis ◽  
Emmanuel Karapidakis
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Cost Savings ◽  
Energy System ◽  
Energy Storage System ◽  
Fast Response ◽  
Full Scale ◽  
Battery Energy

The field of energy, specifically renewable energy sources (RES), is considered vital for a sustainable society, a fact that is clearly defined by the European Green Deal. It will convert the old, conventional economy into a new, sustainable economy that is environmentally sound, economically viable, and socially responsible. Therefore, there is a need for quick actions by everyone who wants to move toward energy-efficient development and new environmentally friendly behavior. This can be achieved by setting specific guidelines of how to proceed, where to start, and what knowledge is needed to implement such plans and initiatives. This paper seeks to contribute to this very important issue by appraising the ability of full-scale implementation of RES combined with energy storage in an island power system. The Greek island power system of Astypalaia is used as a case study where a battery energy storage system (BESS), along with wind turbines (WTs), is examined to be installed as part of a hybrid power plant (HPP). The simulation’s results showed that the utilization of HPP can significantly increase RES penetration in parallel with remarkable fuel cost savings. Finally, the fast response of BESS can enhance the stability of the system in the case of disturbances.

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