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Vol 152
Pages:
185-189
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RUS
Research article
Mining electromechanics

Ferroresonance phenomena in transformer-capacitor compensators of combined action

Authors:
O. B. Shonin1
E. A. Boitsova2
About authors
  • 1 — Associate Professor G.V. Plekhanov Saint Petersburg State Mining Institute
  • 2 — Research assistant G.V. Plekhanov Saint Petersburg State Mining Institute
Date submitted:
2001-09-22
Date accepted:
2001-10-06
Date published:
2002-08-26

Abstract

Features of ferroresonance oscillations and methods of their elimination are considered on the example of transformer-capacitor system of longitudinal and transverse compensation used in power circuits of powerful electric motors, in power supply systems of ore-thermal and arc steelmaking furnaces. Based on the solution of Duffing's equation, the influence of current amplitude and system attenuation coefficient on the operating mode of transformer-capacitor has been determined. The stability area of the basic type of oscillations has been evaluated. It was found the existence of subharmonic oscillations and the influence of not only the amplitude but also the source phase on the appearance of anomalous modes caused by the relay effect and the phenomenon of self-modulation was revealed. It is shown that the elimination of ferroresonant oscillations is connected with maintenance of a magnetic circuit mode close to linear and with a choice of a damping coefficient from the condition of the maximum permissible value of the active resistance introduced into a line.

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References

  1. Данилов Л.В. Теория нелинейных электрических цепей / Л.В. Данилов, П.Н.Матханов, Е.С.Филиппов. Л.: Энергоиздат, 1990.
  2. Дацис Я.Б. Емкостная компенсация реактивных нагрузок мощных токоприемников промышленных предприятий / Я.Б.Дацис, Г.М.Жилов. Л.: Энергия, 1980.
  3. Медведев В.С. Control System Toolbox / В.С.Медведев, В.Г.Потемкин; МИФИ. М., 1999.
  4. Филиппов Е. Нелинейная электротехника. М.: Энергия, 1968.
  5. Хьюз В. Нелинейные электрические цепи. М.: Энергия, 1967.

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