نتایج جستجو برای: power model

تعداد نتایج: 2493468  

Journal: :Keldysh Institute Preprints 2018

Journal: :سنجش از دور و gis ایران 0
عبدالمطلب رستگار دانشگاه گلستان علی منصوریان دانشگاه خواجه نصیرالدین طوسی محمد طالعی دانشگاه خواجه نصیرالدین طوسی دیاکو یاری دانشگاه خواجه نصیرالدین طوسی سارا بهشتی فر دانشگاه تبریز

using new approaches to optimize the process of power transmission line routing can solve many complex problems which power transmission line routing decision-makers are faced. due to the expansion of involved parameters we can consider multi-objective evolutionary algorithms as appropriate method in this area. in this thesis with using multi-objective evolutionary algorithms nsga-ii and offere...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی برق و کامپیوتر 1391

power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...

Journal: :Journal of computational dynamics 2021

<p style='text-indent:20px;'>We examine the complexity of constructing reduced order models for subsets variables needed to represent state power grid. In particular, we apply model reduction techniques DeMarco-Zheng grid model. We show that due oscillating nature solutions and absence timescale separation between resolved unresolved variables, construction accurate becomes highly non-tri...

In this paper, a dynamic optimization approach for optimal choice of energy carriers in thermal power plants is proposed that analyzes the substitution of energy carriers in short-term planning of a power plant.The model is based on the linear programming method with the objective of minimizing costs under constraints of resource availability, energy balances, environmental regulations and elec...

Following the rise of the fuels that power plants consume in the deregulated market, an increase in the electricity prices would be expected. This article tries to study the effects of power plants’ fuel prices adjustment on the amount of increase in electricity prices in the market. The components of the deregulated power market were modeled in the systems dynamics method with the aim of findi...

Journal: :shiraz journal of system management 0

abstract. a practical common weight scalarizing function methodology with an improved discriminating power for technology selection is introduced. the proposed scalarizing function methodology enables the evaluation of the relative efficiency of decision-making units (dmus) with respect to multiple outputs and a single exact input with common weights. its robustness and discriminating power are...

Journal: :international journal of health policy and management 0
stephen gill department of political science, york university, toronto, on, canada solomon r. benatar university of cape town, cape town, south africa

ilona kickbusch’s thought provoking editorial is criticized in this commentary, partly because she fails to refer to previous critical work on the global conditions and policies that sustain inequality, poverty, poor health and damage to the biosphere and, as a result, she misreads global power and elides consideration of the fundamental historical structures of political and material power tha...

Journal: :روش های عددی در مهندسی (استقلال) 0
رحمت اله هوشمند r. hooshmand حسین سیفی و ولی اله طحانی h. seifi and v. tahani

in this article, an effective method to control a power system during emergency conditions is presented. based on fuzzy linear programming (flp), a new technique is developed to solve the load shedding and generation reallocation (lsgr) optimization problem. the objective function consists of terms of load curtailments and deviations in generation schedules. the constraints are power system var...

In order to study the stability and fast dynamic of the power grid, modeling and identification of hydropower plant systems such as turbine, governor and excitation is required. Turbine is a mechanical device and usually identified through field tests. In this paper, the identification of the unit 8 of Abbaspour power plant is conducted. The linear and nonlinear model of the Francis turbine are...

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