35kv side structure of compact 500kv main transformer

Abstract

The invention relates to a compact 35kv side structure of a 500kv main transformer, which comprises an A, B, C three-phase transformer which is connected with a main circuit by a triangular bus, the main circuit is connected with a 35kv bus which is connected with all branch circuits, and each branch circuit comprises a capacitance branch circuit and a reactance branch circuit; the capacitance branch circuit comprises a parallel capacitor set and a serial rector connected with the parallel capacitor set; the reactance branch circuit comprises a three-phase reactor; the triangular bus adopts a dry insulated bus for accomplishing a triangular winding; A, B, C three phases are overlaid in each parallel capacitor set in the capacitance branch circuit; and in the reactance branch circuits, the reactors are piled dry parallel air-core reactors or magnetic-shielding parallel reactors.

Description

technical field [0001] The invention relates to a compact 500kv main transformer 35kv side structure. Background technique [0002] my country's 500kv substation adopts 550kv / 220kv / 35kv three-level voltage, and the low-voltage side is connected to reactive power compensation device and station power, which is an important part of the substation. [0003] At present, in the design of substations, the design optimization of high voltage levels is generally emphasized. By optimizing the wiring type, adopting compact equipment, and reducing the size of power distribution devices, the reliability of the substation is improved, the floor area is reduced, and the project cost is reduced. However, the original ideas and models are still continued for the low-voltage side of the main transformer, and conventional equipment and conventional power distribution devices are used. There has been no obvious development and change over the years, and it occupies a large area. In the substa...

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Problems solved by technology

[0013] The shortcomings of conventional dry resistance are also obvious. Its size is relatively large, and it must meet the magnetic shielding distance between them. It is generally arranged in a "shaped" or "shaped" and occupies a large area, such as image 3 , Figure 4 , Figure 5 and Image 6 As shown in the figure, the dotted line box of the reactor indicates the magnetic shielding distance

[0014] Conventional capacitor complete sets are arranged in separate phases in substations, resulting in a large footprint, such as Figure 7 , Figure 8 shown

In the figure, each phase reactor is installed on a tower, and each phase reactor is divided into two sections. This arrangement occupies a large amount of land area

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