第39卷第7期2018年7月自 动 化 仪 表PROCESS AUTOMATION INSTRUMENTATION Vol．39No．7Jul.2018
收稿日期:2017-10-11作者简介:罗永金(1985 ),男,硕士,工程师,主要从事特高压直流输电换流阀水冷系统的设计与研究,E-mail:582948528@https://www.doczj.com/doc/f813455825.html, 复合式换流阀冷却系统的设计与试验
罗永金1,杨 垒2,马根坡1,刘俊杰1,张琳琳1,陈本乾1
(1.许昌许继晶锐科技有限公司,河南许昌461000;2.国家电网公司运行分公司哈密管理处,新疆哈密839000)摘 要:换流阀冷却系统是高压直流输电工程中换流阀安全运行的重要保证三换流阀冷却系统主要采用水-水冷却和水-风冷却两种方式三水-水冷却方式存在高水耗二排水污染以及使用范围受地区限制等问题;水-风冷却方式存在换热效率低二高能耗二高维护成本以及难以满足极端高温环境下的换流阀换热要求等问题三针对上述缺陷和实际应用需求,设计了一种不受地域二水源和环境条件限制的复合式换流阀冷却系统三该系统采用水-风冷却方式,并以制冷机组为辅助冷却系统,具有零水耗二无排水污染及低能耗等特点三仿真试验表明,该系统为我国直流输电工程的发展提供了技术支撑三
关键词:零水耗;制冷机组;换流阀;冷却系统;高压直流输电
中图分类号:TH39;TP206.1 文献标志码:A DOI:10.16086/https://www.doczj.com/doc/f813455825.html,ki.issn1000-0380.2017100019 Design and Test of Compound Cooling System of Converter Valve
LUO Yongjin 1,YANG Lei 2,MA Genpo 1,LIU Junjie 1,ZHANG Linlin 1,CHEN Benqian 1
(1.Xuchang XJ Jingrui Science &Technology Co.,Ltd.,Xuchang 461000,China;
2.Hami Management Office,Grid Operation Branch of State Grid Corporation of China,Hami 839000,China)Abstract :The cooling system of converter valve is an important guarantee for the safe operation of converter valve in high-voltage direct current (HVDC)project.Water-water cooling and water-air cooling are two of the mainly used methods in cooling system of converter valve.The water-water cooling method has the problems of high water consumption,drainage pollution and limited application range;while the water-air cooling method has the problems of low heat exchange efficiency,high energy consumption,high maintenance cost and the difficulty to meet the heat exchange requirement in extreme high temperature environment.Considering the defects mentioned above and actual application requirements,a compound converter valve cooling system has been designed,which is not restricted by geographical,water source and environmental conditions.The system utilizes water-air cooling method,and uses the refrigeration unit as the auxiliary cooling system,which features zero water consumption,no water pollution and low energy consumption.Simulation experiments show that the system can provide technical support for the development of direct current transmission project in our country.
Keywords :Zero water consumption;Refrigeration unit;Converter valve;Cooling system;High-voltage direct current(HVDC)power transmission 0 引言
目前,高压直流(high-voltage direct current,HVDC)[1-3]
输电技术在我国得到了飞速发展,尤其是特高压直流
输电工程的不断推广,使其成为我国电网发展战略的
首选[4]三在特高压直流输电系统中,换流阀冷却系统是保证其核心设备换流阀安全二稳定运行的重要辅助
设备三因此,如何满足特高压直流输电工程的发展对
冷却系统的苛刻要求[5],以及提高冷却系统的可靠性是目前研究的热点之一三
当前的换流阀冷却系统中,水-水冷却方式存在使用范围受地域限制,以及排污水污染等问题,不能满足国家相关环境保护的法律与政策要求三而水-风冷却方式存在换热效率低二耗能大二设备维护成本高等问题三上述缺陷直接制约着我国直流输电技术的发展三因此,亟需开发设计一种具有洁净环保二超低水耗和能耗不受使用地区限制等特点的换流阀冷却系统三1 常规换流阀冷却系统一般而言,换流阀冷却系统根据冷却水循环回路万方数据