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۱Energy Management in a Fuel Cell’s Dispersed Generation System By a Hierarchical Genetic Controller
نویسنده(ها): ، ،
اطلاعات انتشار: بیست و دومین کنفرانس بین المللی برق، سال
تعداد صفحات: ۱۳
This paper deals a new strategy developed for optimizing the energy flow by using Genetic Algorithm (GA) method implemented on a small Dispersed Generation (DG) system with two energy sources, a pack of batteries (accumulator) and the stack of Fuel Cell (FC) to use of new energy resources. This method establishes an energy management between these sources to reach the best performance and acceptable operation of this hybrid structure with respect to fuel economy and overall efficiency indexes. One of the other goals of this paper is to
investigate the applicability of the GA systembased algorithm in hybrid system. With respect to dynamic behaviour of this optimization problem, this system is simulated to demonstrate the validity and the convenience of GA approach. Hence, an Object Oriented Programming (OOP) Tool has been developed at Electrical department of Shahid Bahonar University of Kerman to simulate this hybrid structure. It is based on C++ code implemented in Borland C++ Builder V6. The proposed method involves an advance hierarchical supervisory controller. The advantage of this implementation is reusability, reconfigurable code (different optimizer, different working space & different load profiles) and extensibility. It repares a good environment for supervisory control of stack as a major part of fuel cell’s DG system. The simulation results confirm the feasibility and
encourage more research towards an actual application.

۲A Novel Hysteresis Band Width Modulator forVSC Used in FACTS Based on Fuzzy Algorithm
نویسنده(ها): ،
اطلاعات انتشار: بیست و سومین کنفرانس بین المللی برق، سال
تعداد صفحات: ۷
Flexible AC Transmission Systems arevery useful utilities in electric power management. One of qualification factors of these instruments is the amplitude of highfrequency harmonics produced in their output. Most of recent types of FACTS use a main building block called VSC (Voltage Source Converter) which convert DC to AC bymodulating AC wave forms on DC by using pulse modulation. Hysteresis modulation is a simple and useful technique for this kind of purpose. Changing the hysteresis band dynamically can help to attenuate output harmonics. In this article a TSK fuzzy controller has been designed in order to vary the proposed band according to system signals to reach suitable results. In addition an integrator has been added to modulator's loop for employing integral control advantages.<\div>

۳Active Power Generation Pattern via Considering Voltage Stability Margin Improvement
اطلاعات انتشار: بیستمین کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۶
A novel approach to find optimal real power generation pattern will be introduced in this study. This has been achieved by maximizing the power system voltage stabilitymargin and minimizing generation cost. The loadability limit index is used to assess static voltage stability security margin.Based on proposed algorithm, a Toolbox has been developed to recognize the loadability limit by using Lagrangian method. The mentioned problem has been modeled as a non–linear and multiobjective optimization problem along with Hybrid Genetic Algorithm Particle Swarm Optimization (HGAPSO) method toreach the optimal generation pattern. The method has been performed as a hierarchical optimization problem. In the firststage, HGAPSO method has been used to reach the securest pattern of real power. Also, mentioned voltage stability toolbox has been executed to evaluate the voltage stability marginrespectively each real power generation pattern during HGAPSO search. These simulations are performed on IEEE 30 bus test system. To validation of proposed method, obtained results have been compared with Particle Swarm Optimization (PSO) results<\div>

۴Cost Optimized Of Fuel Cell Power Plant Connected to Grid
اطلاعات انتشار: دومین کنفرانس بین المللی سالانه انرژی پاک، سال
تعداد صفحات: ۴
Management in supplying residential load with fuel cell power plant (FCPP) connected to grid is the aim of this paper. Economical fuel cell model include is proposedhere. Operational cost, startup cost and different tariffs on electricity during the day hour is discussed. In this paper reformer is used for product hydrogen for FCPP.The tariff for purchasing natural gas is assumed constant. Genetic algorithm (GA) is used to determine optimal operation of FCPP with six–minute change in load pattern. The results are discussed in conclusion<\div>

۵The Combination of Fuel Cell and Wind Turbine to Reduce Total System Cost
اطلاعات انتشار: دومین همایش ملی انرژی باد و خورشید، سال
تعداد صفحات: ۱۵
In this paper a combination of wind turbine and fuel cell power plant (FCPP) connected to grid is used to supply a residential load. GA algorithm is applied to find optimum output power of FCPP connected to grid.The oscillating nature of wind energy (WE) has different effects on the system operational cost. Since FCPP can produce both thermal and electrical energy at the same time, it is tried to supply thermal load besides electrical load. Integration of FCPP and WE with local grid results in lower operational cost than that of individual units. A cost model consist of electrical power from WE, cost of energy, power trade with the local grid, thermal recovery from ‎the FCPP, start–up cost of FCPP and maintenance cost; is used to analyze the operational cost.Load profiles have changed in every six minutes and the tariff for electricity is variable.A XCO2\6kw wind energy unit is used to commuteKhavaf, in Mashhad province, wind data to electric.According to electrical and thermal load demand, available wind power and different tariffs for purchasing and selling electricity of local grid the operation of the FCPP system is scheduled to optimize operational cost. Encouraging results indicate feasibility of the proposed technique.<\div>

۶Studying the Performance of a Photovoltaic Power Plant of 100 kw Capacity in Bushehr, Iran
اطلاعات انتشار: اولین کنفرانس بین المللی دستاوردهای نوین پژوهشی در مهندسی برق و کامپیوتر، سال
تعداد صفحات: ۵
Nowadays, the use of renewable energies, PV systems in particular, have had tremendous growth in the world for reasons such as lack of environmental pollution and no need for repair maintenance. One of the most essential bases for the construction of a PV power plant is feasibility studies and checking the power plant performance that must be done before construction. Therefore, in this paper the construction of a PV power plant of 100 kW in Bushehr, Iran will be examined in detail by using PVsyst software package. The numerical results verify the high Performance Ratio of the desired plant in the aforementioned region.<\div>

۷An Approach for Increasing Wind Power Penetration in Deregulated Power System
اطلاعات انتشار: Scientia Iranica، بيست و سوم،شماره۳، ۲۰۱۶، سال
تعداد صفحات: ۱۲
Wind power generations as a renewable source of energy have become under the spotlight of policy markets and energy providers recently. However, the technical constraints, production variability and uncertainty of wind power have limited its extensive integration into power system. Having these limitations in mind, the present paper sets for a new methodology for increasing wind power integration in deregulated electricity market. The proposed method is presented with the consideration of voltage stability assessment and wind power uncertainties. Our plan aims at maximizing social welfare and minimizing investment and annual operation cost. At the same time, we seek to overcome line constraint by taking into account wind uncertainties. In order to fulfill the aims, FACTS devices and price sensitive loads are utilized. On the other hand, a multi–objective optimization problem was used to evaluate the annual costs and outcomes of wind power investment, the optimal setting of FACTS devices, and optimal load shedding. Expected Security Cost Optimal Power Flow (ESCOPF) is used to minimize the expected total cost of system operation. To solve the proposed planning problem, Non Dominated Sorting Genetic Algorithm (NSGA–II) is exploited. Our proposed method has been applied to an IEEE30 bus test system by considering two wind scenarios. The simulation results demonstrate the efficiency of the proposed planning.
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