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Electrical system and method for the operation thereof

An electrical equipment and electrical technology, applied in the field of energy distribution equipment, can solve the problems of shortening the life of the transformer, damaging the transformer, etc., and achieving the effect of avoiding the overheating of the transformer

Active Publication Date: 2014-01-22
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A slight overload can already severely shorten transformer life, or even cause damage to the transformer involved

Method used

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  • Electrical system and method for the operation thereof
  • Electrical system and method for the operation thereof
  • Electrical system and method for the operation thereof

Examples

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Embodiment Construction

[0024] exist figure 1 A high-voltage grid 10 can be seen in the middle, which is connected to a medium-voltage grid 30 via a power transformer 20 . The ring cable 40 is connected to the medium voltage network 30 , which interconnects the substations 50 to 58 forming an open loop 45 . according to figure 1 As shown, the separation point T of the open loop 45 is formed by the substation 54 .

[0025] for according to figure 1 The layout of the wind power installation 70, which in the example includes three windmills 71, 72 and 73, is connected to the connection 52a of the low voltage side of the substation 52 via the transformer 60. The wind power installation 70 generates electrical energy, which is fed into the ring cable 40 and thus into the medium-voltage network 30 via the low-voltage connection 52 a of the distribution substation 52 .

[0026] exist figure 1 In , substations 50 and 51 are also described in detail as representative of other substations. It can be seen...

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Abstract

The invention relates, among other things, to a method for controlling an electrical system (90), in particular an energy distribution system, comprising at least one transformer (92). According to the invention, the temperature in the interior of the transformer (92) is measured so as to form a inner temperature reading (Ti), a current reading (I) is measured, which indicates the current flowing through the transformer (92) on the primary side or the secondary side of the transformer (92) or is proportional to said current, in the case of an overload current situation the inner temperature reading (Ti) and the current reading (I) are used to determine how long the overload current situation can last before the temperature in the interior of the transformer has reached or exceeds a predetermined maximum temperature, and the further control of the electrical system (90); takes place in consideration of the determined time period (tmax).

Description

technical field [0001] The invention relates to a method for controlling an electrical installation, in particular an energy distribution installation, having at least one transformer. Background technique [0002] This method can be used, for example, in substations at the sub-distribution level. Substations at the secondary distribution level mainly consist of medium voltage switchgear, transformers and low voltage distribution units. In secondary distribution networks, substations are usually operated in open loop. Hereinafter, the term "medium voltage" should be understood as a voltage ranging from 1 kV to 50 kV, and the term "low voltage" should be understood as a voltage ranging from 200 V to 1 kV. [0003] In distribution substations, liquid-filled (for example oil-filled) transformers are mainly used as distribution transformers, which technically are very sensitive to thermal overload reactions. Even slight overloads can severely shorten transformer life, or even...

Claims

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Application Information

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IPC IPC(8): H02H6/00H02H5/04H02H7/04H01F27/42
CPCH02H6/005H01F27/42H02H7/04
Inventor G.布克格拉伯J.雷曼施耐德R.施米德B.许普福林H.施柏克
Owner SIEMENS AG
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