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Gear adjusting method of tap switch of converter transformer valve group, medium and system

A technology for converter transformers and tap changers, which is applied in the gear adjustment of tap switches, media and systems, and can solve problems such as inability to effectively protect equipment and fail to fully reflect the real fault status of equipment, so as to achieve perfect voltage stress protection logic , Increase the gear jump monitoring function to avoid the effect of protection refusal

Pending Publication Date: 2021-07-16
国网宁夏电力有限公司超高压公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a gear position adjustment method, medium and system of a tap changer of a valve group of a converter transformer, to solve the problem that the existing technology cannot fully reflect the real fault state of the equipment and cannot effectively protect the equipment

Method used

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  • Gear adjusting method of tap switch of converter transformer valve group, medium and system
  • Gear adjusting method of tap switch of converter transformer valve group, medium and system
  • Gear adjusting method of tap switch of converter transformer valve group, medium and system

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] The embodiment of the invention discloses a gear adjustment method of a tap changer of a valve group of a converter transformer. The converter transformer valve group includes six converter transformers. Each converter transformer has a tap changer. Such as figure 1 As shown, the gear adjustment method in a preferred embodiment of the present invention includes the following steps:

[0020] Step S101: Calculate the valve side voltage of the v...

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PUM

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Abstract

The invention discloses a gear adjusting method of a tap switch of a converter transformer valve group, a medium and a system. The method comprises the following steps that a valve side voltage of a converter transformer valve group is calculated; if the valve side voltage is greater than the first preset voltage, an upshift prohibition instruction is sent to a tap switch of a converter transformer of the converter transformer valve group; the converter transformer valve group comprises six converter transformers, each converter transformer is provided with a tap switch, and the calculation formula of the valve side voltage is as follows, Udi0 represents the valve side voltage, Uac represents the network side access voltage of the converter transformer valve group, TCPmax represents the highest gear of the tap switch, TCPNOR represents the rated gear of the tap switch, and n represents the adjusting step length of the tap switch. According to the method, voltage stress protection can effectively cover all equipment, protection failure is avoided, and the voltage stress protection logic of the converter transformer is perfected.

Description

technical field [0001] The invention relates to the technical field of voltage stress protection for a valve group of a converter transformer, in particular to a gear adjustment method, medium and system for a tap changer of a valve group of a converter transformer. Background technique [0002] For a DC converter station, the converter transformer tap changer plays a vital role. When the DC power rises or falls or the system voltage is disturbed, the conversion ratio of the grid side and valve side of the converter transformer can be changed by adjusting the tap changer. Converter transformer valve side voltage Udi0, so as to further achieve the purpose of regulating the DC voltage, making the trigger angle operate within a reasonable range, and ensuring the stable operation of the DC transmission system. [0003] In order to prevent the equipment from being damaged due to excessive voltage on the valve side of the converter transformer, the DC control and protection system...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 刘若鹏孙璐毛春翔柴斌宋海龙徐辉史磊刘钊温泉李昊刘廷堃刘舒杨
Owner 国网宁夏电力有限公司超高压公司
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