Novel valve tower of thyristor converter valve

Abstract

The invention provides a novel valve tower of a thyristor converter valve. The novel valve tower comprises a valve hall, a valve tower body, a valve support (6) and a lightning arrester (9). The valve tower body and the lightning arrester (9) are hung on the lower edge of a steel beam on the top of the valve hall through a suspended insulator chain. The valve tower body is composed of a top shielding case (4), a bottom shielding case (1) and valve layers between the top shielding case (4) and the bottom shielding case (1). The valve tower body is composed of a left half tower body and a right half tower body. Each valve layer is composed of two converter valve modules (2). The valve layers and the bottom shielding case (1) are suspended below the top shielding case (4) through interlayer insulators (3) arranged between the adjacent valve layers and arranged between the valve layers and the bottom shielding case (1). By the adoption of the structure, the valve tower body and the steel beam on the top of the valve hall can swing relatively, the valve layers can also swing relatively, and therefore the valve tower is high in overall flexibly and good in anti-seismic effect.

Description

technical field [0001] The invention relates to a high-voltage direct current transmission equipment, in particular to a novel valve tower of a thyristor converter valve. Background technique [0002] As a large-capacity and long-distance transmission technology, HVDC transmission is increasingly widely used in our provincial and inter-regional networking projects. In HVDC transmission, the converter valve is responsible for the AC-DC conversion function and is the core equipment of the converter station. It is composed of a large number of various components and has a complex structure. Therefore, a complete and reliable protection system is necessary. [0003] In the application of high-voltage direct current transmission projects, low-voltage thyristors are usually used as commutation units and connected to each other in a certain way to obtain higher voltage levels and higher power outputs. When the voltage level reaches tens of kilovolts or even hundreds of kilovolts, ...

AI Technical Summary

Problems solved by technology

For example, there is a valve tower structure that adopts double-row multi-layer and each layer is arranged in staggered layers. Its layers are rigid connection structures, and only the flexible connection design is used at the connection between the valve tower and the steel beam of the valve hall. When the external force swings as a whole, the flexibility of the valve tower is poor, and the seismic performance is poor; there is also a flexible connection for the whole tower, but the valve tower is hoisted in a single row, and its structural span is large and its stability is poor.

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