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Off grid hybrid renewable energy based power systems for rural electrification has become an attractive solution for areas where grid electricity is not feasible. Hybrid systems use several generation technologies, therefore the selection of proper technologies and optimum sizing of the components has become of great importance in reducing the overall cost and increasing the reliability of the service...
As a reaction to environmental footprint, high cost and long payback period of building renewable energy power plants, governments started to scale down renewable energy to the commercial and residential building entities. In this article, the feasibility of residential solar, wind, and hybrid solar-wind power generators to meet electricity demand to a typical villa in Abu Dhabi is analyzed. The evaluation...
The objective of this paper is to control the frequency of hybrid renewable energy system (HRES) with the help of proportional-integral (PI) controller according to sudden change in wind speed, load demand and solar radiation. A comparison study is presented in this paper between conventional PI controllers and PSO tuned optimal PI controllers. The HRES is combination of multiple generation and storage...
Optimal power flow (OPF) is an important tool used in the planning and operation stages of a power system, wherein a certain objective is optimized subject to specific system constraints. Security constrained optimal power flow (SCOPF) is an advanced OPF formulation wherein security constraints should be satisfied in case of contingencies, in addition to the normal system constraints. Possible contingencies...
Energy challenges of today include increasing energy dependency, growing energy consumption, ensuring security of energy supply, reaching for sustainable development and tackling environmental concerns, most importantly climate change. Bangladesh is one of the low energy consuming countries of the world. Still the national grid can so far cover 49% of the total population. Renewable energy sources...
Hybrid Energy Storage Systems (HESS) can supply power more flexibility and balancing to the grid, providing a backup to intermittent renewable energy. Locally, it can improve the management of distribution networks, reducing costs and improving efficiency. In this way, it can ease the market introduction of renewables, accelerate the decarbonization of the electricity grid, improve the security and...
This paper presents a review of different schemes of hybrid energy systems (HES) in islanding mode for remote areas with a focus on solutions for remote electrification which are basically composed by one or a mixed of different energy sources and storage systems. The paper analysis the widely used mathematical approaches for optimization, sizing and modeling of HES for isolated electrification areas...
Wind - Photovoltaic Hybrid System utilization is becoming popular day by day given to its reliable energy resources, decreasing prices of turbines and PV panels and increase in overall energy cost and reduced emission. Design and scheduling of such a hybrid system can be done using various techniques like genetic algorithm, particle swarm optimization, etc. One of the major difficulties in these methods...
In this paper we propose two high performance multiplication-accumulation (MAC) designs. Targeting to operate at higher frequency, we investigate two different techniques based on the carry-save representation in order to reduce the delay impact of the accumulation process on the MAC operation. We conducted detailed experimental measurements to verify the advantages of the proposed MAC designs compared...
A hybrid system utilizes several energy sources to generate electricity. This paper proposes combination of two renewable energies i.e. micro-hydro and photovoltaic for energy independent village application in Dusun Mergosari, Pesawaran Indah Village, Pesawaran Regency, Lampung Province. Previously, the village was only supplied by one micro-hydro generator through a long feeder line with high voltage...
While access to electricity in El Salvador is high, about 92% according to the World Bank, there are still many communities without access to power. Typically these communities are made up of poor, small villages in remote areas. Because they're difficult to access and because the populations are not sizeable, power providers and the government are slow or unwilling to bring power to them. This paper...
The supply of electricity to the rural villages in the south of Algeria where the dispersion of population is very important and the increase in the rate of consumption of electrical energy constitute two major problems encountered by the company of electricity in Algeria. Electricity generation in large southern Algeria is based primarily on diesel power production with enormous technical, economic...
This paper presents a new hybrid algorithm based on the particle swarm optimization (PSO) and the gravitational search algorithm (GSA) for solving the optimal power flow (OPF) in power systems. Performance of this approach for the OPF problem is studied and evaluated on the standard IEEE 30-bus test system with different objective functions. Simulation results on the OPF problem show that the hybrid...
Hybrid energy systems are becoming attractive for providing electricity in remote areas due to excessive expenditure of grid extension, increase in oil price and advances in renewable energy technology. Optimal sizing of components can reduce the cost of hybrid systems. This article illustrates the size optimization of solar-wind-diesel generator-battery hybrid system designed for a remote location...
Control of diesel fuel consumption as an aspect of resource saving in hybrid uninterruptible power systems was considered. Basic block scheme of a hybrid uninterruptible power system was proposed. Features of operation of diesel generator and storage battery were considered. An expression for calculation of acceleration and deceleration mode of diesel generator at the minimum consumption of diesel...
This paper deals with the hybridization of a diesel-electric locomotive to a series hybrid locomotive by adding batteries to the diesel-electric locomotive. The number of battery depends on the energy used by this kind of vehicle during typical trips. Different hybridization rates are considered from a generator system from 50 kW to 650 kW. The Energetic Macroscopic Representation (EMR) is used to...
Bangladesh is experiencing electric power capacity crisis. Access to electricity in Bangladesh is one of the lowest in the world; coverage including Solar Home Systems today stands around 62% of the total population. However the rural areas of Bangladesh where 76% of the population live, is seriously deprived of the electricity facility. [1] Larger energy supplies and greater efficiency of energy...
Load shedding is a very common phenomenon is Bangladesh. During summer, Gazipur experiences more than 15 hours of load shedding every day. This causes disruption in the academic works in IUT campus. The purpose of this paper is to analyse the cost optimisation of a PV-diesel hybrid energy generation system for IUT academic building, which can be used during load shedding. There are two models, one...
Supplying power to traditional communication infrastructure becomes more complex and diversified as multiple energy supplying sources are introduced to the infrastructure such as: 1. Diesel Generators 2. Solar & Wind 3. VRLA (Valve Regulated Lead Acid) Batteries 4. Gel & Lithium Iron Phosphate Batteries 5. Variable demand of site electricity requirements e.g. 48V DC, 24V DC, 220V AC This paper...
This paper purposes an optimal configuration of the distributed hybrid renewable generations based the stand-alone micro-grid system, considering the diesel as the main control source. Due to the natural sources and load of user changes randomly and the nonlinearity of the power output by renewable generations, an intelligent optimization method based improved genetic algorithm and the control strategy...
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