Winding thermometer copper oil temperature difference simulation test device

Abstract

The invention discloses a winding thermometer copper oil temperature difference simulation test device. The device comprises a leakage protection module, an overload protection module, a current rising module, a 24V direct-current power supply output module, a winding thermometer detection module and a temperature detection module, wherein the power input end of the electric leakage protection module is connected with a 220V alternating-current input power supply; the input end of the overload protection module is connected with the output end of the electric leakage protection module; the input end of the current rising module is connected with the output end of the overload protection module; the input end of the 24V direct-current power supply output module is connected with the outputend of the overload protection module; the winding thermometer detection module is connected to a secondary current output loop of the current rising module. The device has the advantages that the thermal simulation characteristic of a winding thermometer can be tested in advance, the operation risk of the operation and maintenance process is effectively reduced, the power supply reliability is improved, the operation time is greatly shortened, and the cost for re-purchasing new equipment is reduced.

Description

technical field [0001] The invention relates to a copper oil temperature difference simulation test device for a winding thermometer. Background technique [0002] The temperature gauge of the main transformer winding in the substation is the oil temperature on the top layer of the transformer, which causes the corresponding angular displacement of the elastic bellows in the instrument, and superimposes the angular displacement produced by the heating element in the instrument, thus indicating the temperature of the transformer winding. The heating element compensates for the different copper oil temperature differences through the change of the secondary side load of the matching device and the transformer CT. As an important device for monitoring the coil winding temperature during transformer operation, the winding thermometer must ensure its good thermal simulation characteristics, which requires accurate measurement of the thermal simulation characteristics of the windi...

AI Technical Summary

Problems solved by technology

According to the field maintenance experience of the existing winding temperature gauge, when testing the temperature rise characteristics of the winding thermometer by providing a thermal simulation test current on site, it is necessary to short-circuit the secondary side of the transformer winding CT. There is a significant risk that the secondary side may be open, which affects the reliability of power supply

In addition, carrying out thermal simulation tests on site requires organizational processes such as work ticket organization, work ticket activation, and work permits, which takes a long time.

Furthermore, the cost of repurchasing an advanced transformer winding thermostat tester is relatively high

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