Guaranteeing the trouble-free operation of capacitor banks in power-supply systems of industrial enterprises

• Veröffentlicht in: Електротехніка і електромеханіка
• Datum: 2016
• Hauptverfasser: Gapon, D.A., Bederak, Ya.S.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Інститут технічних проблем магнетизму НАН України 2016
• Schlagworte: Електричні станції, мережі і системи
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/147039
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Guaranteeing the trouble-free operation of capacitor banks in power-supply systems of industrial enterprises / D.A. Gapon, Ya.S. Bederak // Електротехніка і електромеханіка. — 2016. — № 1. — С. 56-58. — Бібліогр.: 9 назв. — англ.

Purpose. The problem of resonance phenomena in power systems of industrial enterprises using capacitor banks for reactive
 power compensation was detected. Circuit of the capacitor banks tier to downshift main substation tires is present. But there is no
 common algorithm to calculate and avoid such trouble. The main goal of this article is to introduce some basics for power supply
 systems with possible resonant circuits engineering. Methodology. At the first step the data on the change of the current in the
 chemical company network when changing capacitor banks value are received. For these purposes the oscilloscope function of
 digital protection relay was used. Current data samples were analyzed by spectrum detection software. Most significant levels of
 the 3rd and 5th harmonics were achieved. Comparison of harmonic distortion levels with and without capacitor bank is given.
 Results. Achieved data allow making conclusion about overloading reasons of capacitor banks while higher harmonics currents
 presence. A voltage and current harmonious composition measuring in the absence of power quality analyzers using digital
 protection relay terminals or emergencies registers are proposed. The necessity of power quality monitoring near capacitor banks
 connections to avoid resonance phenomena (current and voltage resonance) in industrial power supply systems is proven. The
 control algorithm of capacitor banks to provide electromagnetic compatibility, while various modes of nonlinear load operation is
 given. Originality. Using of digital protection relay oscilloscoping for current resonant detection can allow to significally reduce
 time and cost of solution. Replacement parallel circuit comprising a branch and one active-inductive load to another branch
 network in the presence of higher harmonics source are proposed. Practical value. A sequence for measuring the levels of
 harmonic components at the connections of capacitor banks in the absence of specialized instruments is proposed. The algorithm
 to avoid possible resonance currents in the presence of condensing units is proposed. В статье рассматривается проблема резонансных явлений в системах электроснабжения промышленных
 предприятий, использующих конденсаторные установки для компенсации реактивной мощности. Приведены данные
 по изменению токов 3-й и 5-й гармонических составляющих в сети химического предприятия при изменении
 мощности присоединенных конденсаторных установок. Предложен способ измерения качества электроэнергии при
 отсутствии анализаторов. Разработан алгоритм обеспечения электромагнитной совместимости на
 присоединениях конденсаторных установок