MMC-based auxiliary replacement device and replacement method for sub-modules of flexible DC converter stations
A flexible DC and sub-module technology, applied in the direction of switchgear, electrical components, etc., can solve the problems of low replacement efficiency, time and manpower, and heavy weight of sub-modules, and meet the requirements of reducing the physical fitness of personnel and reducing power outage time , the effect of improving economic efficiency
Active Publication Date: 2018-08-21
GUANGDONG POWER GRID CO LTD SHANTOU POWER SUPPLY BUREAU
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Problems solved by technology
In the process of replacing the sub-module, due to the certain distance between the working platform of the lift truck and the installation position of the sub-module, and the heavy weight of the sub-module itself, it is common to move the sub-module to the installation position by manual handling. The risk of submodules toppling, falling, or colliding with adjacent submodules, and the positioning of the installation position also requires a lot of time and manpower, which requires high physical fitness of the operators and low replacement efficiency
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[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0025] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as...
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The invention relates to a flexible direct current converter station submodule auxiliary replacing apparatus based on a MMC and a replacing method thereof. The auxiliary replacing apparatus comprises a slide seat, limiting components and a rolling component. The limiting components are arranged at two side edges of the slide seat. The limiting components and the slide seat cooperatively form a slideway, wherein a submodule slides on the slideway. The rolling component is movably arranged on the slide seat and a part of the rolling component is exposed in the slideway. The rolling component can roll relative to the slide seat. Through using the flexible direct current converter station submodule auxiliary replacing apparatus based on the MMC, during a replacing process of a converter valve submodule, a new submodule can be rapidly and accurately installed at a valve tower submodule installation position from a work platform so that a requirement of submodule replacing work to personnel body quality is reduced; converter valve submodule replacing efficiency is icnreased; and power failure time is reduced and economic benefits are increased.
Description
technical field [0001] The invention relates to the field of electric power equipment, in particular to an MMC-based auxiliary replacement device and replacement method for sub-modules of a flexible DC converter station. Background technique [0002] Modular multilevel converters (MMC) converter valves are the core components of flexible HVDC converter stations. According to different voltage levels and power device parameters, a converter valve generally consists of hundreds to thousands of sub-modules. The weight of each sub-module is more than 250Kg, and it is installed on the valve tower of the converter valve 1.8 meters to 14 meters above the ground. Due to the unavoidable occurrence of bypass or trip events due to the damage of the sub-module during operation, replacing the damaged sub-module is an important maintenance work of the flexible DC converter station. The operation experience of flexible HVDC projects based on MMC converter valves in comprehensive operatio...
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IPC IPC(8): H02B3/00
Inventor 樊道庆张松光郭曙光王东鹏陈涛林钟楷李盛鸿何晓燕邱栋陈楠林峰张板黄凯漩曾建兴董华梁
Owner GUANGDONG POWER GRID CO LTD SHANTOU POWER SUPPLY BUREAU