نتایج جستجو برای: power system identification

تعداد نتایج: 2913555  

After occurrence of some disturbances in power system that causes the sever imbalance between generation power and electrical load, the power system frequency begins to decrease. To prevent power system frequency instability and stop the frequency decay below the power system allowable frequency limitation, load shedding schemes should be utilized by applying under frequency load shedding relay...

2011
Nemanja Milošević Branko Kolundžija

Paper presents a method for analysis of UHF RFID tags. After a brief overview of RFID system and UHF tags an electromagnetic (EM) simulation of tags in WIPL-D software was conducted. Electrical matching was performed after which tags were excited by a uniform EM wave, induced powers were measured and tag characteristics were compared.

Journal: :international journal of smart electrical engineering 2013
rahmat aazami nosratallah mohammadbeigi hadi mirzaei ali mansouri ehsan mohamadian

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...

2007
Reiner Jedermann Jean-Pierre Emond Walter Lang

Information about current quality state enables large improvements in the dynamic planning for the logistics of fresh products. The main reason for quality losses are temperature deviations. This article investigates how a prediction system that delivers a shelf life prediction at each transhipment point could be integrated into a semi-passive RFID label. Limiting factors for the possible predi...

Journal: :وقایع علوم کاربردی ورزش 0
ali reza amani department of exercise physiology, faculty of sport sciences, shomal university, amol, iran homa esmaeili department of exercise physiology, faculty of sport sciences, shomal university, amol, iran zahra aeinparast department of exercise physiology, faculty of sport sciences, shomal university, amol, iran farideh tari department of exercise physiology, faculty of sport sciences, shomal university, amol, iran

improving anaerobic performance and anaerobic power is the critical aspect on successfully in competitions for many athletes. the purpose of current research was to investigating the effect of various pre-competitions warm-up on anaerobic performance. it has been shown that, differences pre-competitions activity may effect on anaerobic and explosive performance. effect of general warm-up, witho...

Journal: :Frontiers in Energy Research 2021

The automatic identification of the topology power networks is important for data-driven and situation-aware operation grids. Traditional methods lack a data-tolerant mechanism, accuracy their performance in terms thus affected by quality data. Topology related to link prediction problem. graph neural network can be used predict state unlabeled nodes (lines) through training on features labeled...

Journal: :مهندسی قدرت ایران 0
javad gholinezhad university of birjand, iran mahmood ebadian university of birjand, iran mohammad reza aghaebrahimi university of birjand, iran

when power systems are expanded and connected together with weak tie lines, the low-frequency oscillations are increased and the stability margin of the power system decreases. therefore, when designing the transmission system to be used, it is necessary to maintain the dynamic stability of the power system, and to make sure to have the most possible stability margin. sssc is a facts device con...

Journal: :journal of operation and automation in power engineering 2007
h. shayeghi a. ghasemi

flexible ac transmission systems (facts) controllers with its ability to directly control the power flow can offer great opportunities in modern power system, allowing better and safer operation of transmission network. in this paper, in order to find type, size and location of facts devices in a power system a dedicated improved particle swarm optimization (dipso) algorithm is developed for de...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید