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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: Design and application of means of determining the damaged feeder by single phase-to-ground fault in power supply system of Container Terminal
Creators: name: Ð ÑÐ±Ð¸Ð½Ð¸Ð½Ð°, ÐÐ°ÑÐ¸Ñ
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: 2020
Subjects: Ð¾Ð´Ð½Ð¾ÑÐ°Ð·Ð½Ð¾Ðµ Ð·Ð°Ð¼ÑÐºÐ°Ð½Ð¸Ðµ Ð½Ð° Ð·ÐµÐ¼Ð»Ñ
ÑÐ¸ÑÑÐµÐ¼Ð° Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð²ÑÐµÐ¶Ð´ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¸Ð´ÐµÑÐ°
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Ð¼Ð¾ÑÐ½Ð¾ÑÑÑ Ð°Ð²Ð°ÑÐ¸Ð¹Ð½Ð¾Ð³Ð¾ Ð¿ÑÐ¸ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ
single phase ground fault
system of determining the damaged feeder
zero sequence current transformer
power of emergency feeder

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description: 83 pages, including 16 figures, 7 tables
The subject of this work is power supply system of real object Â«Container Terminal Saint-PetersburgÂ». The given work is devoted to making reliable system of determining the damaged feeder. The research set the following goals:
1. Calculation single-phase earth fault currents and set the settings of protective relays.
2. Design of method allowing for an error of correction measured currents for raising the accuracy Ð¾f safeguards initiation signal.
3. Definition of technical requirements to system of determining the damaged feeder.
4. Design of algorithm of determining the damaged feeder.
In this work an analysis of the developed algorithms to the present day for the operation of protection against single-phase earth faults was made and the use of microprocessor-based terminals for determining a damaged feeder with several algorithms are implemented, is justified. Calculations were performed showing the reliability of the operation of the zero sequence protection in the conditions of the system under study.
After analyzing the influence of errors of zero-sequence current transformers on previously calculated values, a correction of the measured currents was proposed based on calibration curves. As a result of all calculations, the technical requirements for the system for determining the damaged feeder and the features of the implementation of working algorithms were determined.