نتایج جستجو برای: digsilent

تعداد نتایج: 267  

با توجه به یکپارچگی و نفوذ منابع تولید پراکنده در سیستم‌های توزیع، جایابی بهینه آن‌ها در ریزشبکه‌ها و شبکه‌های توزیع ایزوله بر اساس توابع هدفی مانند کاهش تلفات، بهبود ولتاژ شین‌ها و... صورت می‌گیرد. منابع تولید پراکنده با استفاده از مبدل‌های الکترونیک قدرت به شبکه‌های فشار ضعیف متصل می‌گردند، به‌طوری که این مبدل‌ها در دو مد کنترل ولتاژ و توان کار می‌کنند. جایابی منابع تولید پراکنده با در نظر گر...

Journal: :Gazi Üniversitesi Fen Bilimleri dergisi 2023

Güç sistemlerindeki generatörler, enerji kaynaklarını verimli kullanmak için maksimum kapasitede çalıştırılır. Bu nedenle, güç dalgalanmalar rotor açısı, gerilim ve frekans açısından kararlılık sorunlarına neden olmaktadır. Özellikle yeni endüstriyel veya yerleşim alanlarının kurulması planlanırken sistemlerine yükler eklenir. çalışmada, sistemdeki yük değerleri değiştirilerek IEEE 14 bara sist...

Journal: :International Transactions on Electrical Energy Systems 2023

The willingness to improve the security and reliability of power supply end-users, often pushed by prescriptions national regulatory authorities, is bringing considerable challenges for distribution system operators. Islanding a portion public network after fault considered measure mitigate effects service interruptions. This procedure usually carried out counterfeeding grid through generator s...

Journal: :Iet Generation Transmission & Distribution 2022

Abstract Conventional phase‐shifting transformers (PST) have been utilized for power flow control in transmission networks many years. Compared to the slow reacting PSTs, recently trending unified controllers (UPFC) enable much faster control. This paper introduces a decentralized scheme (PFCs) without need communication between PFCs. For each PFC, an influence area is defined. The line loading...

2012
A. Blavette D. L. O'Sullivan M. G. Egan A. W. Lewis

Power fluctuations generated by most oscillating wave energy converters without significant amounts of energy storage may have a negative impact on the power quality of the local grid to which they are connected. Assessing this impact on the local network of a potential test site is hence an important step in the selection process of a suitable deployment location. However, site-specific grid i...

2015
Marko Vukobratović Srete Nikolovski Predrag Marić

Distribution feeder is the final stage in the delivery of electricity to consumers. The feeder can be radial or networked. Radial feeders leave the power station towards the consumers without any connection to other power supply. Networked feeders have multiple connections to other supply points. It is common for long radial feeders for voltage to drop along the way and for losses to increase w...

2014
Bin Zhao Hui Li Mingyu Wang Yaojun Chen Shengquan Liu Dong Yang Chao Yang Yaogang Hu Zhe Chen

This study presents the auxiliary damping control with the reactive power loop on the rotor-side converter of doubly-fed induction generator (DFIG)-based wind farms to depress the sub-synchronous resonance oscillations in nearby turbogenerators. These generators are connected to a series capacitive compensation transmission system. First, the damping effect of the reactive power control of the ...

2013
Atthapol Ngaopitakkul Chaichan Pothisarn Sulee Bunjongjit Boonlert Suechoey Auttarat Nawikavatan

The main purpose of this paper is to study the reliability due to the employment of distributed generations (DG) integrated to distribution system. The system under this study is from Provincial Electricity Authority (PEA) that is a part of Thailand’s distribution system. Data of geographic information systems (GIS) including the distance of distribution line and location of load that are param...

2013
Salman Kahrobaee Marcelo C. Algrain Sohrab Asgarpoor

The energizing of large power transformers has long been considered a critical event in the operation of an electric power system. When a transformer is energized by the utility, a typical inrush current could be as high as ten times its rated current. This could cause many problems from mechanical stress on transformer windings to harmonics injection, and system protection malfunction. There h...

2012
Majid Davoodi Mohsen Davoudi

In this study we present a new technique for analysis of capacitor placement in the power distribution systems considering the most of the parameters affected in this problem. Detection of capacitance and optimal placement of capacitors in power distribution system can lead to decrement in losses, enhancement in voltage profile, increment of power factor and freeing up generation capacityand en...

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