Study on Heat Transfer Characteristics of Air-Cooled Platform of High-Voltage DC Converter Valve under Windy Conditions

HOU Zhongcheng; NAN Xiaohong; LI Zaoyang; LIU Lijun; AN Yanjie; LU Hongjian; CUI Peng

doi:10.7652/xjtuxb202301012

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Study on Heat Transfer Characteristics of Air-Cooled Platform of High-Voltage DC Converter Valve under Windy Conditions

更新时间：2025-07-09

- Study on Heat Transfer Characteristics of Air-Cooled Platform of High-Voltage DC Converter Valve under Windy Conditions
- Vol. 57, Issue 1, Pages: 122-130(2023)
- 作者机构：
  
  1. 西安建筑科技大学建筑设备科学与工程学院,西安,710055
  2. 西安交通大学能源与动力工程学院,西安,710049
  3. 国网宁夏电力有限公司超高压公司,银川,750000
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202301012
  CLC： TK124
- Online First：10 January 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
HOU Zhongcheng, NAN Xiaohong, LI Zaoyang, et al. Study on Heat Transfer Characteristics of Air-Cooled Platform of High-Voltage DC Converter Valve under Windy Conditions[J]. 2023, 57(1): 122-130.
DOI：

HOU Zhongcheng, NAN Xiaohong, LI Zaoyang, et al. Study on Heat Transfer Characteristics of Air-Cooled Platform of High-Voltage DC Converter Valve under Windy Conditions[J]. 2023, 57(1): 122-130. DOI： 10.7652/xjtuxb202301012.

摘要

针对北方某换流站换流阀空冷平台

建立了包含换热器、风机、周围建筑及环境风等多种因素在内的三维传热流动数值分析模型

模拟研究了夏季主导风向下环境风对换热器入口空气温度、风机风量和换热量的影响规律

阐明了影响换流阀空冷平台换热性能的主导因素。结果表明:当环境风速由0 m·s

-1

增加至12 m·s

-1

空冷平台入口空气平均温度先升高后降低

在风速3 m·s

-1

时极1、极2空冷平台风机入口平均温度最高

较环境温度分别升高了5.4 ℃与4.0 ℃; 空冷平台下部负压随着风速的增加不断降低

导致风机入口风量持续减少

在风速12 m·s

-1

时极1、极2空冷平台风机入口平均风量较无风环境分别降低了12%与8%; 空冷平台的换热量随环境风速的增加呈现先降低后升高的趋势

环境风速3 m·s

-1

时极1、极2空冷平台的换热性能衰减最为严重

两者换热量较无风环境分别减少了39%与29%; 通过对影响换热量的主导因素分析

发现热风回流带来空冷平台入口温度的上升是导致换热量减小的关键因素。研究结果可为换流阀空冷平台的设计优化提供理论依据。

Abstract

This paper

taking the air-cooled platform of converter valves in a northern converter station as an example

establishes a 3D heat transfer and flow numerical model considering various factors such as heat exchanger

fan

surrounding buildings and ambient wind

investigates the influences of ambient wind on the heat exchanger inlet air temperature

fan airflow and heat exchange capacity under the prevailing wind direction in summer through th

e simulation study

and illustrates the dominant factor affecting the heat exchange performance of the air-cooled platform of the converter valves. The results show that when the ambient wind speed increases from 0 m·s

-1

to 12 m·s

-1

the average air temperature at the inlet of the air-cooled platform increases first and then decreases

and the average inlet temperature of pole 1 and pole 2 air-cooled platform fans is the highest at the wind speed of 3 m·s

-1

which increases by 5.4 ℃ and 4.0 ℃ respectively compared with the ambient temperature; the negative pressure at the lower part of the air-cooled platform decreases continuously with the increase in wind speed

leading to the continuous reduction of the fan inlet air volume

and the average air temperature of pole 1 and pole 2 air-cooled platforms at the wind speed of 12 m·s

-1

decreases by 12% and 8% respectively compared with that under the windless environment; the heat transfer of the air-cooled platform presents a trend of first decreasing and then increasing with the increase in the ambient wind speed

and the heat transfer performance of pole 1 and pole 2 air-cooled platforms declines most seriously at the ambient wind speed of 3 m·s

-1

and decreases by 39% and 29% respectively compared with that under the windless environment. The analysis of the dominant factors affecting the heat transfer shows that the increase in the inlet temperature of the air-cooled platform caused by the return flow of hot air is the key factor causing the reduction in heat transfer. The study results can serve as a theoretical basis for the design optimization of the air-cooled platform of the converter valve.

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