长垂直母线热压耦合厂房通风研究  

Research of Ventilation in Powerhouse Coupling Plant with Thermal-compression of Long Vertical Busbars

作　　者：谢方祥 梁波 陈鹏云 Xie Fangxiang;Liang Bo;Chen Pengyun(Changjiang,Survey,Planning,Design and Research Co.,Ltd,Wuhan,430010)

机构地区：[1]长江勘测规划设计研究有限责任公司,武汉430010

出　　处：《制冷与空调（四川）》2024年第1期77-81,96,共6页Refrigeration and Air Conditioning

摘　　要：大型地下电站发电机引出大多采用长垂直离相封闭母线(IPB),但在长垂直条件下因高度差产生的“烟囱效应”会导致母线上下温差过大,甚至超过母线最大运行工况下的温升限值,带来一定的安全隐患,并限制了地下电站封闭母线引出方式的运用。结合三峡地下电站等长垂直、大电流封闭母线竖井的特点,对长垂直封闭母线在不同影响因素下的热平衡特性进行了理论分析与数值计算。通过工程实践,探索出长垂直母线热平衡和地下厂房母线竖井通风的耦合模型及规律,并在此基础上提出了基于“热压耦合”的长垂直离相封闭母线的应用与通风设计的新思路。Most of the generators in large underground power plants are led out using long vertically separated phase enclosed busbars(IPB).However,under long vertical conditions,the chimney effect caused by height differences can lead to excessive temperature differences between the upper and lower parts of the busbars,even exceeding the temperature rise limit under the maximum operating condition of the busbars,posing certain safety hazards and limiting the use of enclosed busbar lead out types in underground power plants.This article combines the characteristics of the equal length vertical and high current enclosed busbar shaft of the Three Gorges Underground Power Station,conducts theoretical analysis and numerical calculation on the thermal balance characteristics of the long vertical enclosed busbar under different influencing factors.Through engineering practice,a coupling model and regularity between the thermal balance of long vertical busbars and the ventilation of underground factory busbar shafts are explored.Based on this,a new idea for the application based on"thermal pressure coupling"and ventilation design is proposed.

关 键 词：长垂直离相封闭母线 地下厂房 热压耦合通风 热平衡 烟囱效应 

分 类 号：TM41[电气工程—电器]