title: Ð ÐµÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° ÑÐ¾Ð±ÑÑÐ²ÐµÐ½Ð½ÑÑ Ð½ÑÐ¶Ð´ 0,4 ÐºÐ ÑÐ»ÐµÐºÑÑÐ¾ÑÑÐ°Ð½ÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Reconstruction of the auxiliary needs switchgear 0.4 kV for the power plant
Creators: name: ÐÑÑÑÑ, ÐÐ»Ð¸Ð·Ð°Ð²ÐµÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½Ð°Ð±Ð¶ÐµÐ½Ð¸Ðµ
ÑÐµÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ
ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ðµ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð¾
ÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ ÑÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾Ñ
ÐºÐ¾ÑÐ¾ÑÐºÐ¾Ðµ Ð·Ð°Ð¼ÑÐºÐ°Ð½Ð¸Ðµ
power supply
reconstruction
switchgear
power transformer
short circuit

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description: The theme of the graduate work: "Reconstruction of the auxiliary needs switchgear 0.4 kV for the power plant ". The purpose of this work is to develop a reconstruction project of the electrical part of the RUSN-0.4 kV auxiliary needs switchgear for the power plant due to the physical and moral deterioration of the existing electrical equipment. The electrical characteristics of the existing reconstruction object were analyzed, the electrical loads of the outgoing lines were calculated using the demand coefficient method, based on which the definition of transformers, cables, busbars, protection devices was made. A new power supply scheme was developed taking into account the reliability categories of consumers power supply and an emergency reserve scheme was developed based on programmable relays. Thermal resistance of the cables and busburs was verified. The protection devices were tested for breaking capacity. Voltage harmonics levels were assessed for each of the three sections of the RUSN - 0.4 kV. The practical significance and relevance of the work is determined by the current presence of a large number of switchgears with outdated equipment and significant physical wearout at existing power plants in the Russian Federation, which negatively affects the quality and uninterrupted supply of electricity to consumers.