摘要
目前,我国在建或已成的供水工程中12MW及以上同步电动机还没有采用异步全压启动的先例。以三河口水利枢纽12MW水泵水轮机组为例,通过对启动电压降,启动时间,以及启动过程机组热稳定进行计算,得出三河口水泵水轮机组理论上能够克服水泵静阻力矩异步全压启动,并提出启动过程产生问题的解决措施。建议在同类工程中采用异步全压启动方式,还需要考虑电机制造过程中要满足启动要求增加的电机制造成本及技术难度所带来的问题以及机组变化对厂房结构及尺寸的要求。
At present,the synchronous motors of 12 MW and above in the water supply projects under construction or in China have not adopted the precedent of asynchronous full-voltage starting.Taking the 12 MW pump turbine unit of Sanhekou Water Conservancy Project as an example,through the calculation of the starting voltage drop,starting time and thermal stability of the starting process,it is concluded that the Sanhekou pump turbine group can theoretically overcome the asynchronous full-pressure starting of the pump static resistance torque.And propose a solution to the problem in the startup process.It is recommended to use the asynchronous full-pressure start-up method in the same kind of project.It is also necessary to consider the problems caused by the motor manufacturing cost and technical difficulty to meet the increase of the start-up requirements in the motor manufacturing process,and the requirements of the unit change on the structure and size of the plant.
作者
张蕾
毛敏
周宇飞
Zhang Lei;Mao Min;Zhou Yufei(Shaanxi provincialwater resources and electric power survey and design institute,Xi'an 710001,Shaanxi)
出处
《陕西水利》
2019年第9期11-13,共3页
Shaanxi Water Resources
关键词
异步全压启动
电压降
同步电动机
水泵水轮机组
Asynchronous full-voltage start
the voltage drop
the synchronous motor and the pump turbine
