Results 11 to 20 of about 140 (122)

Electric and magnetic comparison of two 10-phase autotransformers

Ain Shams Engineering Journal, 2022
To optimally select multi-pulse rectifiers (MPRs) used in industrial applications, the electrical and magnetic analysis must be performed simultaneously.
Rohollah Abdollahi, Mahdi Golchob
doaj   +1 more source

Coupled autotransformer and magnetic-control soft-start method for super-large-capacity high-voltage motors

High Voltage, 2019
The large current generated by a direct start of the super-large-capacity high-voltage induction motor would have a huge impact on the power grid as well as the motor itself.
Jiaxin Yuan, Chuansheng Wang, Shan Yin, Liangliang Wei, Kazuhiro Muramatsu, Baichao Chen   +5 more
doaj   +1 more source

UUDAT based on the modular multilevel converter and diode bridges for high-voltage DC application

The Journal of Engineering, 2019
Conventional unidirectional DC/DC converters for high-voltage direct current application employ DC/AC/DC technology and suffer from high converter cost and power loss.
Meng Zhou, Wang Xiang, Wenping Zuo, Weixing Lin, Jinyu Wen, Zhujun Xie   +5 more
doaj   +1 more source

Interconnection of VSC-HVDC and LCC-HVDC using DC–DC autotransformer

The Journal of Engineering, 2019
This article investigates the feasibility of interconnecting LCC-HVDC and VSC-HVDC through an un-interrupted DC autotransformer (DC AUTO). The interconnected system aims at taking advantage of two HVDC technologies.
Zhihan Yang, Mengbo Li, Xiaojun Lu, Wang Xiang, Wenping Zuo, Liangzhong Yao, Weixing Lin, Jinyu Wen   +7 more
doaj   +1 more source

Autotransformer Monitoring System

Renewable Energy and Power Quality Journal, 2010
This paper describes the monitoring system of autotransformer installed in the Poreba and Bierun substation. Apart from the monitoring system carried out on microprocessor controllers ADAM 5000, a process of adapting the transformer for the system of data acquisition was also described.
Ryszard Kowalik, Pawel Kopanski, Krzysztof Glik   +2 more
openaire   +1 more source

Prediction of oil flow and temperature distribution of transformer winding based on multi-field coupled approach

The Journal of Engineering, 2019
For large oil-filled transformers, the oil flow and temperature distribution in transformer windings are an essential issue to be addressed. However, the computation of the oil flow and temperature distribution is a complicated engineering problem ...
Longnv Li, Wei Liu, Hai Chen, Xiaoming Liu   +3 more
doaj   +1 more source

A New Method of Ground Fault Location in 2 × 25 kV Railway Power Supply Systems

Energies, 2017
Owing to the installation of autotransformers at regular intervals along the line, distance protection relays cannot be used with the aim of locating ground faults in 2 × 25 kV railway power supply systems.
Jesús Serrano, Carlos A. Platero, Máximo López-Toledo, Ricardo Granizo   +3 more
doaj   +1 more source

Analysis of distribution laws of transformer oil indicators in 110-330 kV transformers

Electrical engineering & Electromechanics, 2021
Introduction. Ensuring the operational reliability of power transformers is an urgent task for the power industry in Ukraine and for most foreign countries.
O. Shutenko, S. Ponomarenko
doaj   +1 more source

Integral Approach-Based Sensitive Protection of Autotransformers for Turn-to-Turn Faults

Energies
Current differential protection, using either phase currents or negative-sequence components, is commonly applied for the sensitive protection of power transformers.
Krzysztof Solak, Waldemar Rebizant, Frank Mieske   +2 more
doaj   +1 more source

A DC/DC autotransformer with integrated fault blocking capability

Zhejiang dianli, 2023
As crucial equipment for multi-voltage DC interconnection， high-capacity high-voltage DC/DC converters can be used for voltage conversion and DC fault isolation.
LU Yi, WANG Feng, DENG Weicheng, CHEN Qian, XU Jianzhong, QIU Peng   +5 more
doaj   +1 more source