نتایج جستجو برای: electric power system protection
تعداد نتایج: 2812363 فیلتر نتایج به سال:
many mobile and off-grid devices include electronics and other electrical consumers like servo drives, which need a quite low supply power. since the price for photovoltaic modules drops continuously, photovoltaic power supply is interesting in more and more applications. in solar powered systems, a battery is needed to store energy for the night and cloudy periods. the power electronics of suc...
Supply development is a major challenge in electric power industry. In order to fulfill this need, and regarding complexities in the energy sector, a comprehensive model such as system dynamics is zimperative. The purpose of this study is to reach this model. The performance of the model was based on the selection of a technology which could give way to the lowest total cost of genera...
In the present scenario the information technology plays a very important role in all engineering applications. In electrical engineering, information technology support secure operation, customer participation, market advantages and growth for the power industry. Smart grid refers to electric power system that enhances grid reliability and efficiency by automatically responding to system distu...
چکیده ندارد.
Restructuring of electric industry has seriously affected the operation and planning process of electric power systems. Due to the unbundling process and new market requirements, a set of new challenges and goals have been introduced in the field of transmission planning. Moreover, the uncertainty level of input data to planning process has been increased significantly. In this paper first, the...
the design and application of a fuzzy logic based controller to a leakage current relay waspresented in this paper. a novel approach based on fuzzy logic to form the tripping action of leakagecurrent relay was investigated. in addition to the theoretical aspect of fuzzy logic, detection of a leakagecurrent, measurement of the leakage current, determination of its duration, trip opening of fault...
with the development of restructured power systems and increase of prices in some hours of day and increase fuel price, demand response programs were noticed more by customers. demand response consists of a series of activities that governments or utilities design to change the amount or time of electric energy consumption, to achieve better social welfare or some times for maximizing the benef...
1 Abstract-This paper was written by a Working Group of the IEEE Power System Relay Committee to provide guidance to the industry to better coordinate generator protection with generator control. The paper discusses specific calculation methods that can be used to insure generator protection and excitation system control are fully coordinated. It also specifically addresses the coordination o...
-This paper proposes a new concept, dynamic decision-event tree, for rapid response to impending system cascading. The paper gives a classification and probability order of high-order contingencies that threaten the security of power systems. A detailed account of the concept of DDET, its elements, and how a system operator may use it are also included. An illustration of how to generate a DDET...
در این پروژه، با تعیین میزان تولید منابع پراکنده در کنار کنترل ولتاژ/توان راکتیو و تجدید آرایش سیستم برای سطوح بار مختلف، بهره برداری از سیستم توزیع برای تحقق اهدافی چون کاهش تلفات انرژی سیستم، بهبود شاخص پایداری ولتاژ و تقسیم مناسب جریان توان بین فیدرها انجام می شود. به این منظور یک مسیله بهینه سازی تعریف و با توجه به تعداد فراوان متغیرهای کنترلی و حالت گسسته آن ها، الگوریتم حلی بر مبنای روش ج...
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