Study on Setting Method of Valve Inlet Temperature Protection of HVDC Converter Valve Cooling System

YAN Xilin; ZHANG Yining; CUI Pengfei; GUO Jianbao; YANG Guangyuan

doi:10.14044/j.1674-1757.pcrpc.2019.06.025

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Study on Setting Method of Valve Inlet Temperature Protection of HVDC Converter Valve Cooling System

更新时间：2024-09-14

- Study on Setting Method of Valve Inlet Temperature Protection of HVDC Converter Valve Cooling System
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 40, Issue 6, Pages: 140-145(2019)
- 作者机构：
  
  中国南方电网有限责任公司超高压输电公司检修试验中心
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2019.06.025
  CLC： TM721.1
- Published：2019，
- 稿件说明：
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[1]严喜林,张怿宁,崔鹏飞,国建宝,杨光源.高压直流换流阀冷却系统进阀温度保护定值整定方法研究[J].电力电容器与无功补偿,2019,40(06):140-145.

YAN XILIN, ZHANG YINING, CUI PENGFEI, et al. Study on Setting Method of Valve Inlet Temperature Protection of HVDC Converter Valve Cooling System. [J]. Power capacitor & reactive power compensation, 2019, 40(6): 140-145.
[1]严喜林,张怿宁,崔鹏飞,国建宝,杨光源.高压直流换流阀冷却系统进阀温度保护定值整定方法研究[J].电力电容器与无功补偿,2019,40(06):140-145. DOI： 10.14044/j.1674-1757.pcrpc.2019.06.025.

YAN XILIN, ZHANG YINING, CUI PENGFEI, et al. Study on Setting Method of Valve Inlet Temperature Protection of HVDC Converter Valve Cooling System. [J]. Power capacitor & reactive power compensation, 2019, 40(6): 140-145. DOI： 10.14044/j.1674-1757.pcrpc.2019.06.025.

摘要

换流阀冷却系统是高压直流输电系统的重要设备

为避免晶闸管PN结温度过高导致换流阀损坏

配置有进阀温度保护。结合晶闸管换流阀损耗计算原理

推导出晶闸管换流阀结温计算公式

并提出了一种考虑晶闸管损耗计算误差的结温计算修正公式。在此基础上

系统地提出了阀冷却系统进阀温度保护定值整定方法。该方法通过结温计算修正公式计算晶闸管最高允许结温

反向推导出最大允许进阀温度

从而确定阀冷系统进阀温度保护定值。通过对南方电网鲁西换流站进阀温度保护定值整定进行算例分析

验证了该方法的有效性。该方法已在南方电网鲁西站、金官站现场应用

效果良好

可为后续新建直流工程阀冷系统保护设计及定值整定提供参考。

Abstract

Converter valve cooling system is an important equipment of HVDC transmission system. For avoiding damage of the converter valve due to high PN junction temperature of the thyristor

it is equipped with inlet valve temperature protection. The formula for calculating the junction temperature of thyristor valve is derived in combination of the loss calculation principle of thyristor valve and a kind of calculation and correction formula of junction temperature considering loss calculation error of thyristor. On this basis

the protection setting method of the inlet valve of the valve cooling system is systematically proposed. This method calculates the permissible maximum junction temperature of the thyristor and reversely deduces the maximum allowable inlet valve temperature through junction temperature calculation and correction formula

so to determine the temperature protection setting of the inlet valve of the valve cooling system. The effectiveness of the method is verified by an example analysis of the setting of the temperature protection of the incoming valve of Luxi converter station of southern power grid. This method has been applied in the field of Luxi station and Jinguan station of southern power grid with good result

which can provide referenceforprotectiondesignandsettingofvalvecoolingsystemfornewproject.

关键词

高压直流输电换流阀冷却系统结温计算进阀温度保护定值整定

Keywords

HVDCconverter valve cooling systemjunction temperature calculationvalve inlet temperature protectionprotection setting

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