Novel three-phase-integrated autotransformer switch lead arranging method

Abstract

The invention relates to a novel three-phase-integrated autotransformer switch lead arranging method and belongs to the technical field of transformer manufacturing. The method includes arranging an A-phase single-phase voltage adjusting switch and a B-phase single-phase voltage adjusting switch on the left side of a transformer long shaft facing a high voltage side, and arranging a C-phase single-phase voltage adjusting switch on the right side of the transformer long shaft; connecting A, B and C to tap contacts of respective single-phase voltage adjusting switches; arranging leads, connected with a medium-voltage sleeve, of the respectively single-phase voltage adjusting switches on a medium voltage side to be clamped together with a tap wire. By the method, insulation distance between an out-of-phase switch and the tap wire is guaranteed, and width of an oil tank is correspondingly reduced to meet requirements of transport limit; insulating partitions are arranged between the leads and the oil tank as well as an out-of-phase coil to separate electric fields of the leads, so that unde the premise that insulation reliability of the leads is guaranteed, width dimension of the oil tank is further reduced to adapt to more harsh and strict transport conditions.

Description

Technical field [0001] The invention relates to a novel three-phase integrated autotransformer switch lead arrangement method, which is suitable for equipping three single-phase voltage regulating switches. The voltage level of the switches is 220kV and above, and due to the limitation of transportation width, the three single-phase A three-phase integrated autotransformer with voltage regulating switches arranged on one side of the long axis of the transformer belongs to the technical field of transformer manufacturing. Background technique [0002] At present, most of the 500kV substations in our country are equipped with single-phase autotransformers, and each transformer is equipped with a 220kV voltage regulating switch for voltage regulation. With the continuous development of power grid construction, the scale of transmission and transformation lines such as West-to-East Power Transmission and Xinjiang Power Transmission continues to expand. More substations are located in...

AI Technical Summary

Problems solved by technology

With the continuous development of power grid construction, the scale of power transmission and transformation lines such as west-to-east power transmission and Xinjiang power transmission continues to expand. More substations are located in mountainous or hilly areas in the west, and site selection is very difficult; in addition, approval The procedures for substation land use are becoming more and more difficult and time-consuming, and the cost of land acquisition is also becoming more and more expensive as land prices continue to rise in recent years

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