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Energy futures for modern economies depend critically on the electric power system. Estimating the long-run benefits and costs of proposed energy or environmental policies requires tools that optimize investment in generation, account for physical constraints on the delivery network while maintaining desired reliability, and characterize the adverse impacts of pollutants. An integrated engineering,...
The success of privatization of airline and telecommunication industries has inspired the electricity industry to undergo deregulation and restructuring toward becoming a more transparent and competitive electricity market environment. The pool market model is one of the most preferred electricity market model implemented in many developing countries. Despite being the reasonable and safe option for...
This paper proposes an optimization based approach in allocating transmission line losses and also load flow in integrated power system network. The idea of this approach is taken from the way of real honey bees to search food or foraging activity by flying in their surrounding comb for getting the optimum value of food. The objective function in this optimization process for transmission line losses...
With an increasing number of small-scale renewable generator installations, distribution network planners are faced with new technical challenges (intermittent load flows, network imbalances…). Then again, these decentralized generators (DGs) present opportunities regarding savings on network infrastructure if installed at strategic locations. How can we consider both of these aspects when building...
This paper presents a novel Unit Commitment (UC) formulation with wind power considering production cost of every generator. In the proposed formulation, the subsidies will be provided for those generators whose production cost per MWh rises due to wind power integrated into power system. In order to avoid exorbitant subsidies for inefficient generators, the objective function of the proposed UC formulation...
This paper presents an algorithm for optimal design of hybrid renewable energy system consisting of wind turbines, photovoltaic modules, micro-hydro and biomass units. In this approach, unit cost of energy ($/kWh) is used to compare different renewable projects. For each renewable generating unit, energy cost is computed using the unit's levelized cost and annual energy production. An objective function...
One of the two hydro turbine-generator sets in small hydropower plant has become inoperable due to generator stator winding failure. Considering the age of the plant, together with generator repairs, more comprehensive plant refurbishment options have been analysed. The optimal solution is chosen, one that provides improved reliability, increased electricity production with best financial and economic...
The present paper introduces a power service discovery system. The power service discovery system realizes new power services on a smart grid. The new power services are based on the selection of generations, which enables us to provide/receive electricity under specific conditions. We describe the design and implementation of the power service discovery system. Our implementation constructs a demonstration...
Results of theoretical and experimental research on operation of microelectromechanical generator with charge doubling are considered. It is shown that diodes' reverse currents should be taken into account. The design method is presented.
The purpose of integrating a battery energy storage system (BESS) with large scale wind farms is to compensate the intermittency of the wind power and also to make wind farms more dispatchable and competitive against the conventional power plants. This paper presents a novel wind power dispatch control scheme with a BESS based on model predictive control to manage the amount of energy generated and...
Increased environmental and economic concerns have set the stage for an increase in the fraction of electricity supplied using renewable sources. Recent advances in wind prediction offer hope that reduction in the uncertainty of wind availability will lead to an increase in its value. Model based methods that predict future wind availability and then optimize local generation have been seen to be...
In this paper, a multi-step simulation tool for the evaluation of operation strategies with predictive concepts for controllable distributed generators is proposed and applied exemplarily to perform an annual simulation of a sewage gas CHP trading at a power exchange. The analysis quantifies the disturbing effect of prediction errors as compared to a simulation without predictive elements. The simulation...
Due to limited predictability of variable renewable energy sources such as wind energy, the balance between demand and supply in electricity systems is challenged. Market players integrating these technologies in their portfolio face increasing imbalances and are, consequently, charged with cost-reflective imbalance tariffs. In this paper, an optimization model is developed which aims to minimize...
Around the world there are many rural areas need access to electricity, extend the transmission line is one option. However, the long distance between the nearest main grid and the rural system as well as the costs of transmission line expansion rapidly increasing makes grid extension difficult, costly and economically unviable. Therefore, using microgrid technology with renewable energy options to...
In competitive electricity markets with deep concerns at the efficiency level, demand response programs gain considerable significance. In the same way, distributed generation has gained increasing importance in the operation and planning of power systems. Grid operators and utilities are taking new initiatives, recognizing the value of demand response and of distributed generation for grid reliability...
Throughout the world there are plans to enhance the operation of electricity power networks to deal with the introduction of distributed and renewable power systems. The basic approach is to provide a new communications system to monitor and control future power networks (Smart Grid). Unfortunately electromagnetic disturbances such as those associated with typical electromagnetic interference (EMI)...
The objective of this paper is to present an evaluation related to the possible application of the Feed-in and Net metering tariffs into microgrid systems. Microgrid systems are currently among the options considered to support the network especially during periods of blackout. Critical loads in various areas (e.g. military bases, health centers, nuclear installations, etc) operate already under a...
The aim of a new site solution concept (i-Site) has been to optimize energy costs, speed of deployment, and site equipment such as number of PV modules. The present study provides the first example of a Life Cycle Assessment (LCA) quantifying the future environmental benefit of i-Site for support of a radio base station in South African Vodafone network. This study will moreover show the business...
Human factors can play a significant role in the behavior of a system of systems. This is particularly true in collaborative system of systems, an example of which is the Smart Grid Demand Response. The Smart Grid Demand Response example is used in this paper to develop and prototype an approach to examine the impact of human factors (e.g., news stories and human interactions) on system of systems...
In recent decades, smart grid have become increasingly attractive to both energy producers and consumers. Amongst the main challenges for the successful realization of smart grid includes the integration of renewable energy resources, real time demand response and management of intermittent energy resources. Apart from smart grid, the development of micro-grids should take into consideration of issues...
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