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Control device of bypass switch of power module in converter valve

A bypass switch and power module technology, which is applied in the field of bypass switch control devices, can solve problems such as failure to reliably trigger the power module bypass switch in a converter valve, and achieve the effect of improving drive reliability.

Active Publication Date: 2021-09-17
XUJI GRP +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a control device for the bypass switch of the power module in the converter valve, which is used to solve the problem that the prior art cannot reliably trigger the bypass switch of the power module in the converter valve

Method used

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  • Control device of bypass switch of power module in converter valve
  • Control device of bypass switch of power module in converter valve
  • Control device of bypass switch of power module in converter valve

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] like image 3 The control device for the bypass switch of the power module in the converter valve shown in the present invention includes a software overvoltage drive circuit, a segment I hardware protection drive circuit, a segment II hardware protection drive circuit, a dynamic switching circuit, and a redundant control circuit And electro-optical signal conversion drive module.

[0028] Wherein, the software overvoltage driving circuit, the I-section hardware protection driving circuit and the II-section hardware protection driving circuit respectively collect and connect to the sampling circuit. The software overvoltage driving circuit includes an A / D conversion module and a programmable logic device (such as FPGA) connected in sequence, and the input terminal of the A / D conversion module is connected to the sampling circuit, whi...

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Abstract

The invention relates to a control device for a bypass switch of a power module in a converter valve, which belongs to the technical field of direct-current power transmission. The device comprises a software overvoltage driving circuit which comprises a first processor, wherein the first processor is used for comparing an obtained digital voltage signal borne by the power module with a set digital overvoltage protection value according to the obtained digital voltage signal, and outputting a first path of overvoltage driving signal; a hardware protection driving circuit which is used for comparing an acquired analog voltage signal borne by the power module with a set analog overvoltage protection value and outputting a second path of overvoltage driving signal; and a redundancy control circuit which is used for outputting a driving signal of the bypass switch according to the first path of overvoltage driving signal or the second path of overvoltage driving signal. Through combination of software driving and hardware driving, driving of the bypass switch is realized, and driving reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission, and in particular relates to a control device for a bypass switch of a power module in a converter valve. Background technique [0002] Since there are many fault points in the flexible HVDC converter valve system, the fault develops rapidly, so it is particularly important to ensure the reliable operation of the system. Among them, MMC (Multi-level Modular Converter) is an important topology of flexible HVDC converter valves. According to the voltage level requirements of each converter station, each bridge arm is composed of hundreds of sub-modules (ie power modules) in series, and the half-bridge and full-bridge structures of the sub-modules are shown in Figure 1(a) and Figure 1(b) respectively. However, since the voltage value of a single sub-module is thousands of volts, each sub-module is equipped with a bypass switch. In order to ensure the safe operation of the conver...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02J3/36H03K17/94
CPCH02M1/32H02J3/36H03K17/941Y02E60/60
Inventor 胡四全张锐董朝阳陈同浩韩坤黄小有雍进玲王艳双朱承治宣佳卓任改玲肖彬王朝亮丁超张文锦赵培丽
Owner XUJI GRP
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