Fixing and voltage sharing device for vehicle-mounted standard voltage transformer used for verifying transformer of 500 kV

Abstract

The invention discloses a fixing and voltage sharing device for a vehicle-mounted standard voltage transformer used for verifying a transformer of 500 kV. The fixing and voltage sharing device is used for performing fixing and voltage sharing on a primary coil of the vehicle-mounted standard voltage transformer, and the vehicle-mounted standard voltage transformer comprises a disc insulator, an iron core, the primary coil wound around the iron core and a transformer shell with a cavity. The iron core and the primary coil are arranged inside the cavity, and the device comprises an annular voltage sharing mechanism and a fixing mechanism, wherein the external surface of the primary coil is sleeved with the annular voltage sharing mechanism in a matched mode, the annular voltage sharing mechanism is used for fixing the primary coil to the iron core, and the fixing mechanism is used for fixing the annular voltage sharing mechanism inside the cavity. The primary coil is locked through the annular voltage sharing mechanism so as not to loosen and fall off in the vehicle-mounted environment. Fixing rods are arranged between annular voltage sharing mechanism and the transformer shell so that the primary coil will not shift in a vehicle vibration environment, and the stability and reliability of working of the vehicle-mounted standard voltage transformer are achieved.

Description

technical field [0001] The invention relates to a fixing and voltage equalizing device of a vehicle-mounted standard voltage transformer for 500kV transformer calibration. Background technique [0002] For on-site calibration of power voltage transformers with a voltage level of 500 kV, the standard voltage transformer and step-up standard voltage transformer and other equipment are usually dragged to the substation, and the full voltage difference method is used to trace the source to the national standard. It is necessary to use the power frequency standard voltage transformer to increase the tested voltage transformer and the standard voltage transformer to the highest rated power frequency voltage according to the expanded voltage multiple, so as to measure the secondary terminal voltage to achieve the purpose of error verification. [0003] Due to the high test voltage of the 500 kV voltage level power voltage transformer, the output voltage and capacity of the sta...

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Problems solved by technology

[0003]Due to the high test voltage of the 500 kV voltage level power voltage transformer, the output voltage and capacity of the standard voltage transformer are relatively large, so the output winding of the standard voltage transformer The number of winding turns of the standard voltage transformer is large, the insulation layer is thick, and the layout is relatively difficult, which eventually leads to the standard voltage transformer's wire package size is large and heavy, and it is easy to be loose and deformed when used in a vehicle vibration environment, causing damage

[0004]The existing vehicle-mounted standard voltage transformers used for on-site verification of 500 kV power transformers, because the vehicle-mounted standard voltage transformers are often installed on-board In a vibrating environment, and the iron core and wire wrap are not completely rigidly fixed, the vehicle-mounted standard voltage transformer cannot be reliably applied to the on-site verification of a voltage class of 500 kV power transformer

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