某柔性直流换流站阀外余热回收分析
Analysis of Waste Heat Recovery Outside Valve of a Flexible DC Converter Station
丁杰峰 1成川 1向权 1罗小勇2
作者信息
- 1. 国网湖北省电力有限公司 直流公司,湖北 宜昌 443000
- 2. 河南绿控科技有限公司,河南 许昌 461000
- 折叠
摘要
直流输电系统的送/受端(换流站)均设有大型换流阀.换流阀工作过程中会产生大量热量,对其热量的冷却目前主要采用闭式冷却塔或风冷两种形式.在冬季利用闭式冷却塔将换流阀热量散出时,排风口处湿热空气会凝结成白雾,影响周围环境.为了充分利用其余热资源,以某实际柔性直流换流站阀外冷却系统为例,监测其循环水全年运行温度变化情况并分析余热质量,提出一种利用水源热泵的余热回收利用方案,并分析其节能减排潜力.通过研究发现鄂渝两侧换流阀余热温度相对稳定,可为11.9 万m2 用户提供热源,节约标准煤5304 t,减少CO2 排放量1.3 万t,具有巨大节能减排效益.
Abstract
The DC transmission system's transmission/receiving end(converter station)is equipped with large converter valves.The converter valve generates a large amount of heat in operation,and its heat cool currently adopts two forms:closed cool tower or air cool.When the heat of the converter valve is dissipated by a closed cool tower in winter,the hot and humid air at the exhaust port will condense into white mist,affecting the surrounding environment.This paper takes the external cooling system of an actual flexible DC converter station as an example to monitor the annual operating temperature change of its circulating water and analyze the waste heat quality,propose a waste heat recovery scheme using a water source heat pump,and analyze its energy saving and emission reduction potential.It is found that the waste heat temperature of the converter valve on both sides of Hubei and Chongqing is relatively stable,which can provide the heat source for users of 119,000 square meters,save 5,304 tons of standard coal,and reduce carbon dioxide emissions by 13,000 tons,which has huge energy saving and emission reduction benefits.
关键词
换流站/节能/蒸发冷却/余热利用Key words
converter station/energy saving/evaporative cooling/waste heat utilization引用本文复制引用
出版年
2023
NETL
NSTL
维普
万方数据