نتایج جستجو برای: distribution transformer

تعداد نتایج: 618771  

2013
Il-Keun Song Won-Wook Jung Chul-Min Chu Seong-Soo Cho Joon-Ho Choi

A distribution system was designed and operated by considering unidirectional power flow from a utility source to end-use loads. The large penetrations of distributed generation (DG) into the existing distribution system causes a variety of technical problems, such as frequent tap changing problems of the on-load tap changer (OLTC) transformer, local voltage rise, protection coordination, excee...

2016

In order to conduct safe and efficient flow management of motor or transformer oil, it is necessary to implement specific waste oil analysis and treatment in order to protect the environment and people’s health and safety. The study presents analysis and treatment of waste oil in the electric power distribution companies, showing some data of the MH ''ERS” ZEDP “Elektro-Bijeljina” joint-stock c...

Journal: :Integrated Computer-Aided Engineering 2002
Nikolaos D. Doulamis Anastasios D. Doulamis Pavlos S. Georgilakis Stefanos D. Kollias Nikos D. Hatziargyriou

In this paper, a combined neural network and an evolutionary programming scheme is proposed to improve the quality of wound core distribution transformers in an industrial environment by exploiting information derived from both the construction and transformer design phase. In particular, the neural network architecture is responsible for predicting transformer iron losses prior to their assemb...

صفار, فاطمه , عباس زاده, کریم ,

Distribution transformers with OVAL windings introduces as optimal Optimums transformers in the lowest power. Because consumption of Iron and copper decrease in these transformers, it decreases Loss of power transformers than cylindertransformers. Pay attention to the level of deformation transformers in OVAL, its electromagnetic forces will be reduced. All Articles have given different methods...

2017
Zhuo Yang Junjie Ba Jing Pan Guanghui Zhou Ge Liu Li Min

Power transformers are one of the most critical devices in power systems. It is responsible for voltage conversion, power distribution and transmission, and provides power services. Therefore, the normal operation of the transformer is an important guarantee for the safe, reliable, high quality and economical operation of the power system. It is necessary to minimize and reduce the occurrence o...

2010
I. Hernández F. de León J. M. Cañedo J. C. Olivares-Galván

Simple equivalent permeability and reluctance models are obtained for the transformer core joints from the analysis of the magnetic flux. It is shown that the flux variations in the joint zone can be fitted with simple Gaussian expressions suitable for transformer design purposes. These models are derived from 2D and 3D finite element simulations. The magnetic flux distribution in the transform...

2018
Lefeng Cheng Tao Yu Guoping Wang Bo Yang Lv Zhou

This paper develops a novel dynamic correction method for the reliability assessment of large oil-immersed power transformers. First, with the transformer oil-paper insulation system (TOPIS) as the target of evaluation and the winding hot spot temperature (HST) as the core point, an HST-based static ageing failure model is built according to the Weibull distribution and Arrhenius reaction law, ...

2005
Hideki Honda Akira Asakawa Shigeru Yokoyama

When steep lightning surge enters a pole-mounted distribution transformer, the voltage distribution of the internal windings is unbalanced. It is known that a layer-to-layer short or a turn-to-turn short occurs where the voltage distribution of windings is high. In this paper, the voltage distribution of the windings was measured at the primary and secondary sides of the transformer using a tes...

2012
Yash Pal A. Swarup Bhim Singh

Abstract: In this paper, a new topology is developed for a three-phase four-wire (3P4W) distribution system utilizing a zig-zag transformer along with three-phase threewire (3P3W) Unified Power Quality Conditioner (UPQC).In this proposed topology the neutral point of the star connected transformer, used for the connection of series active power filter (APF) of 3P3W UPQC, is utilized as a fourth...

Journal: :International Journal of Power Electronics and Drive Systems (IJPEDS) 2016

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