摘要
针对北方某换流站换流阀空冷平台,研究了其在不同环境风条件下的换热能力,并在最不利环境风条件下对不同挡风墙安装策略下空冷平台的换热特性进行了分析。结果表明,当空冷平台位于建筑下游且距离建筑较近时,环境风对其换热性能的影响最大。在最不利环境风条件下,换流阀极1、极2空冷平台的换热量较无风环境分别减少了39.3%与28.6%。不同的挡风墙安装策略对空冷平台换热能力的影响存在明显差异,下挡风墙能够有效阻隔上游空冷平台排出的热气流进入下游空冷平台,而上挡风墙则可以有效削弱空冷平台自身的热风回流现象。在最不利环境风条件下,采用上挡风墙4.0 m的布置策略对空冷平台的换热更为有利,为换流阀空冷平台的设计与改造提供了有益指导。
The heat transfer capacity of the air-cooled platform of a converter valve at a northern converter station was studied under various windy conditions.Additionally,the heat transfer characteristics of the air-cooled platform were analyzed under the most unfavorable windy conditions with different windscreen installation strategies.Results show that the influence of ambient wind on the air-cooled platform is most pronounced when the platform is situated downstream of the building and in close proximity to it.Under the harshest windy conditions,the heat transfer rates for the air-cooled platforms of the converter valve pole 1 and pole 2 decrease by 39.3%and 28.6%respectively,compared to the wind-free conditions.Different windscreen installation strategies have varying impacts on the heat transfer capacity of the air-cooled platform.The lower windscreen effectively blocks the hot air flow from the upstream air-cooled platform from entering the downstream air-cooled platform,while the upper windscreen effectively reduces the hot air recirculation of the platform.On balance,the upper windscreen 4.0m arrangement strategy is more favorable to the heat transfer of the air-cooled platform for the toughest wind conditions.This research provides useful guidance for the initial design and subsequent further optimization of the air-cooling platform of the converter valve.
作者
刘志远
潘亮亮
杨晨
李早阳
刘立军
LIU Zhiyuan;PAN Liangliang;YANG Chen;LI Zaoyang;LIULijun(Ultra-high Voltage Company,State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750000,China;State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750001,China;School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2023年第5期438-445,共8页
Journal of Thermal Science and Technology
基金
宁夏自然科学基金资助项目(2021AAC03506)。
关键词
空冷平台
数值模拟
环境风
挡风墙
换流阀
air-cooled platform
numerical simulation
windy conditions
windscreen
converter valve
