نتایج جستجو برای: islanded oper

تعداد نتایج: 1549  

Journal: :Appl. Soft Comput. 2016
Shariq Bashir Wasif Afzal Abdul Rauf Baig

As social media and e-commerce on the Internet continue to grow, opinions have become one of the most important sources of information for users to base their future decisions on. Unfortunately, the large quantities of opinions make it difficult for an individual to comprehend and evaluate them all in a reasonable amount of time. The users have to read a large number of opinions of different en...

2017
Usman Bashir Tayab Muhammad Kashif

Conventional droop control is a basic control strategy for power sharing in islanded microgrid applications. This strategy has several limitations, such as low transient response, frequency and voltage deviations. This paper presents a modified droop control method for the proper operation of parallel-connected inverters in islanded microgrid. The proposed method is able to improve transient re...

2013
Mir N. Ambia Ahmed Al-Durra Cedric Caruana

This paper represents mitigation scheme of wind farm output power fluctuation in micro-grid system during grid and islanded mode. The impact of mitigation technique using sodium sulphur battery energy storage system is investigated during grid and islanded mode of micro-grid system. A micro-grid system with wind farm and photovoltaic system is used for the investigation of the mitigation of win...

2017
Ghullam Mustafa Bhutto Claus Leth Bak Ehsan Ali

In islanding, a portion of the power network, comprised of the loads and distributed generation (DG) units, is isolated from the rest of the power grid and forms a micro grid (MG). In this condition, it becomes essential for the islanded MG to operate in a stable and controlled manner by providing ancillary services. When the MG is cut off from the main grid, the islanding must be detected by t...

Journal: :RAIRO - Operations Research 2010

2014
Mohamed Esreraig Joydeep Mitra

Microgrids work in two modes, grid connected and islanded. Short circuit levels in islanded mode tend to be small compared to those in grid-connected mode. Moreover, power flows in microgrids are not always unidirectional. For these reasons, it is difficult to protect microgrids using relaying strategies traditionally used in distribution systems. In this paper, a new technique is presented whi...

2014
Tine L. Vandoorn Jeroen D. M. De Kooning Bart Meersman Brecht Zwaenepoel

Because of their small scale and large share of intermittent power sources, islanded microgrids require additional means of flexibility, such as dedicated storage. For controlling the loads and distributed generation (DG) units in an islanded microgrid, the voltage-based droop (VBD) control has been developed. This controller determines the switching actions of these units’ power electronic int...

Journal: :نظریه تقریب و کاربرد های آن 0
شایسته رضایی دانشگاه آزاد واحد علوم و تحقیقات ح. ماهیار دانشکده ریاضی دانشگاه خوارزمی تهران(تربیت معلم سابق)

in this paper boundedness and compactness of generalized composition oper-ators from logarithmic bloch type spaces to q_k type spaces are investigated.

ح. ماهیار شایسته رضایی,

In this paper boundedness and compactness of generalized composition oper-ators from logarithmic Bloch type spaces to Q_K type spaces are investigated.

2017
Mahdieh S. Sadabadi Qobad Shafiee Alireza Karimi

The purpose of this paper is to explore the applicability of linear time-invariant (LTI) dynamical systems with polytopic uncertainty for modeling and control of islanded DC microgrids under plug-and-play (PnP) functionality of distributed generations (DGs). We develop a robust decentralized voltage control framework to ensure robust stability and reliable operation for islanded DC microgrids. ...

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