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Modular multilevel voltage source converter valve hall

A modular multi-level, voltage source converter technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of increased space occupation, cost of supporting devices, complicated connections, etc., to save space. The effect of ground space, convenient connection and simplified connection difficulty

Active Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +2
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  • Abstract
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AI Technical Summary

Problems solved by technology

When multiple valve towers need to be connected in series due to the high voltage level of the system, the connection between the two valve towers will be cumbersome, that is, the connecting bus needs to cross a valve tower, which requires consideration of the insulation between the bus and valve towers The problem is that it will increase the space occupied
[0006] (2) At the same time, since the busbar needs to cross the valve tower, it is necessary to consider the support of the busbar, which brings the cost of additional support devices

Method used

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  • Modular multilevel voltage source converter valve hall
  • Modular multilevel voltage source converter valve hall
  • Modular multilevel voltage source converter valve hall

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] In order to solve the cumbersome layout of the main circuit of the valve hall and the problem of space occupation, the present invention proposes the following scheme:

[0025] The fittings installed at the bottom of the valve tower are connected to the busbar of the valve module, and are within the surrounding area of ​​the shielding cover of the valve tower, and there is no need to design the shielding cover to equalize the pressure of the fittings. The primary current flows through the pressure equalizing ring at the top of the valve tower. The specific method is: the outlet busbar of the last valve module on the top of the valve tower is directly connected to the pressure equalizing ring on the top of the valve tower; As the outlet end at the top of the valve tower. In this way, the inlet and outlet lines of ...

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Abstract

The invention relates to a modular multilevel voltage source converter, and particularly relates to the main loop design of a modular multilevel voltage source converter valve hall. The valve hall comprises a main loop which consists of a voltage equalizing ring which is taken as a through-flow loop and installed on the top of a valve tower and a fitting which is installed on the bottom of the valve tower. The fitting is connected with a bus-bar of a valve module in the valve tower and is in a range surrounded by a valve tower shielding cover. The voltage equalizing ring on the top of the valve tower is taken as the through-flow loop, which achieves a role of voltage equalization, and more importantly, greatly simplifies the bus-bar connection difficulty and saves the valuable floor space.

Description

technical field [0001] The invention relates to a modular multi-level voltage source converter, in particular to a design of a main circuit of a valve hall of a modular multi-level voltage source converter. Background technique [0002] The high-voltage DC transmission technology based on voltage source converters is characterized by the use of voltage source converters composed of fully controlled power electronic devices, and the voltage source converters based on half-controlled thyristor devices in conventional DC transmission. Modular multilevel technology is widely used at present. [0003] Modular multi-level technology is to cascade multiple basic functional units, namely sub-modules, to meet the actual voltage level. As the voltage level increases, the number of sub-modules that need to be connected in series will increase significantly. At present, the tower structure is adopted, that is, several valve modules are connected in series to form a valve tower, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00
CPCH02M1/00
Inventor 屈海涛欧阳文敏张升董巍安靖
Owner STATE GRID CORP OF CHINA
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