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Vol 178
Pages:
120-122
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RUS

Long-range redundancy of protection failures in 0,4 kV networks at gas transportation enterprises

Authors:
A. V. Belenko1
S. P. Petrov2
About authors
  • 1 — G.V. Plekhanov Saint Petersburg Mining Institute
  • 2 — LLC Gazpromtransgaz Saint Petersburg
Date submitted:
2007-11-07
Date accepted:
2008-01-18
Date published:
2008-11-18

Abstract

The electrical networks of voltage 0,4 kilovolt are the most widespread ones, they are used at all industrial and agricultural enterprises, power stations and substations. Fail-safe operation of enterprises depends to a large extent on these networks. A problem of remote reservation of failures of guards and cutout switches has always been very acute in the networks of 0,4 kilovolt. Due to a very substantial reduction of values of short-circuit currents as the distance between a point of fault and power supplies increases, it was not possible to carry out this reservation by the same traditional methods as in high-voltage power networks. This problem has been found possible to be solved only in recent years when digital technology began to be used for protection of electrical networks.

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References

  1. Беляев А.В. Дальнее резервирование отказов защит и выключателей в сетях 0,4 кВ / А.В.Беляев, М.А.Эдлин // Электрические станции. 2002. № 12.
  2. Беляев А.В. Выбор аппаратуры, защит и кабелей в сетях 0,4 кВ. М.: Энергоатомиздат, 1988.

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