空冷机组汽轮机主轴直接驱动给水泵的变工况运行仿真试验

Simulation Test on Air Cooling Unit Under Off-design Conditions with Feed Water Pump Directly Driven by Steam Turbine Main Shaft

汽轮机主轴直接驱动给水泵技术是一种全新的给水泵驱动方式,目前国内尚无成熟的运行经验。针对采用该技术的某350 MW直接空冷机组进行了系列变工况运行仿真试验。结果表明:对于配置1台100%容量主机泵和1台50%容量备用泵的机组,该技术完全能够满足在机组背压快速变化、负荷变化及给水泵故障等工况下给水流量的需求。

The technology of feed water pump directly driven by steam turbine main shaft is a new drive technology for feed water pump,and at present there is no mature operating experience about it in China.A series of simulation tests of a 350 MW direct air cooling unit adopting this technology under off-design conditions had been conducted.Results show that,for unit equipped with one 100% capacity main pump and one 50% capacity stand by pump,the technology can fully meet the needs of the feed water flow under the working conditions of rapid change of unit back pressure,load change and feed water pump fault.