A study on rain flashover protection measures for bushings of high voltage class step-up transformer with synchronous condenser at high altitudes

Autor: HOU Jiyong, XU Zhijun, CHENG Zheng, LI Honglu, SHI Feng, ZHU Xiaoli, WEI Yuan

Publikováno v: Zhejiang dianli, Vol 42, Iss 4, Pp 88-94 (2023)

Northwest China is characterized by its high altitude and thin air. The small clearing between the bushings， the charged parts， the grounding bodies of the regulator step-up transformer， and the small safety margin may result in rain flashover.

Externí odkaz: https://doaj.org/article/ed93af4acdb547c8bfc75f5df0d729cf

Precise position control of ultrasonic motors using three parameters high speed switching method

Autor: Masato OKA, Kanya TANAKA

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 904, Pp 21-00224-21-00224 (2021)

The rotation speed of the ultrasonic motor depends on three parameters such as frequency, voltage and phase difference. In current mainstream drive circuits using a step-up transformer, ultrasonic motors are controlled frequency (rotation speed) by v

Externí odkaz: https://doaj.org/article/d3eb0681b7f2428183c35c3ef67286a7

Analysis of step-up transformer tap change on the quantities at the point of connection to transmission grid

Autor: Đorđević Dragan, Radovanović Ana, Dragosavac Jasna, Janda Žarko

Publikováno v: Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", Vol 27, Iss 27, Pp 91-103 (2017)

The analysis of a step-up transformer tap change on the quantities at the point of connection to the transmission grid is presented in this paper. The point of connection of generator TENT A6 has been analyzed, and a detailed model of this generator

Externí odkaz: https://doaj.org/article/b041d5fbe1bd44a795f3f1ecebb5a163

УСТАНОВКА ДЛЯ ВИПРОБУВАННЯ ТРАНСФОРМАТОРНОЇ ОЛИВИ УИМ – 90 З ЕЛЕКТРОННИМ БЛОКОМ ПІДЙОМУ НАПРУГИ

Autor: Alexander Istomin, Serhii Rudenko, Igor Bogatirov, Denis Koliushko, Helena Ponuzhdayeva

Publikováno v: Вісник Національного технічного університету «ХПІ». Серія: Нові рішення у сучасних технологіях; № 1(7) (2021): Вісник НТУ «ХПІ»: Серія "Нові рішення у сучасних технологіях"; 103-108
Вестник Национального Технического Университета "ХПИ" Серия Новые решения в современных технологиях; № 1(7) (2021): Вестник НТУ "ХПИ": Серия "Новые решения в современных технологиях"; 103-108
Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies; No. 1(7) (2021): Bulletin of the NTU"KhPI". Series: New Solutions in Modern Technology; 103-108

For test operations according to the liquid dielectric breakdown voltage measurement method we use high voltage machines that consist of high-voltage step-up transformer, voltage rise block, test cell with electrodes and so on. Described dielectric o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a99581a448ace6f9c9e442e89563f33
https://doi.org/10.20998/2413-4295.2021.01.15

Minimizing Transformer No-Load Losses at Hydropower Plants : A Study of Effects from Transformer Switch-Off During Stand-by Operation

Autor: Luedtke, Elin

Hydropower is the most important power balancing resource in the Swedish electrical power system, regulating the power supply to match the load. Consequently, several hydropower plants have periods of stand-by operation where the power production is

Externí odkaz: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447635