A compact intelligent converter valve

Abstract

Provided is a converter valve, comprising: a plurality of converter valve module layers arranged along the vertical direction, each converter valve module layer comprising: main modules, the main modules comprising a first main module and a second main module which are connected to one another, the first main module being internally provided with a first lightning arrester, two ends the first lightning arrester being respectively a first electric potential and a second electric potential, the second main module being internally provided with a second lightning arrester, two ends of the second lightning arrester being respectively the second electric potential and a third electric potential; a shield cover assembly, connected at the outside of the main modules, the shield cover assembly comprising: first shield covers, wherein the electric potential is fixed as the first electric potential, third shield covers, wherein the electric potential is fixed as the third electric potential, and second shield covers, wherein the electric potential is fixed as the second electric potential; a first lightning arrester equivalent circuit and a second lightning arrester equivalent circuit, the first lightning arrester equivalent circuit being arranged between the first electric potential and the second electric potential, the second lightning arrester equivalent circuit being arranged between the second electric potential and the third electric potential.

Description

technical field [0001] The invention relates to the technical field of direct current transmission, in particular to a compact intelligent converter valve. Background technique [0002] The converter valve is the core equipment of the DC transmission project. By sequentially connecting the three-phase AC voltage to the DC terminal, the desired DC voltage is obtained and power control is realized. [0003] In the prior art, the potential of the converter valve shield is fixed on the main circuit, and the stray capacitance generated on the shield will affect the voltage division of the components on the main circuit in the converter valve module, resulting in uneven voltage division of the devices , this unevenness will distort and destroy the thyristor voltage on the main circuit under the impact of steep waves. Contents of the invention [0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the arre...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the arrester in the valve tower is arranged outside the converter valve module, and the potential of the shielding cover is connected to the main circuit, resulting in damage to the thyristor in the main circuit.

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