摘要
以南水北调东线工程源头泵站江都四站为例,通过单机组优化运行（叶片全调节、变频变速）数学模型的求解、分析可知,在南水北调东线源头泵站扬程变幅（日均扬程7.8~3.8 m,潮差1.2 m）范围内,不管是否实行峰谷电价,泵站叶片全调节优化运行是较为合适的运行模式;变频变速运行仅在扬程低于5.0 m、非满负荷运行时优于叶片全调节;在满负荷工作时,泵站变频变速与定角恒速运行相比,变频变速优化运行带来的效益不足以抵消变频装置的耗损.同时,从泵装置运行的机理出发,证明了大型提水泵站只有在一次调水过程中的扬程变幅足够大时,变频变速优化运行才能产生效益的论点.该成果可为南水北调东线大型泵站的改造、优化运行提供理论依据.
Taking the No.4 Jiangdu Pumping Station in China′s Eastern Route Project of S-to-N Water Diversion Project as a study case,mathematics models and solution methods were systematically proposed for optimal operation of single pump unit within a pumping station through blade-adjusting regulation and variable speed regulation with variable frequency drives.Following results were achieved：（a） Better benefits can be obtained by optimization of blade-adjusting operation compared with optimal variable speed operation by means of variable frequency drive under the conditions of the daily-average pumping heads yearly varies from 3.8 m to 7.8 m and daily mean tidal range 1.2 m affected by Yangtze River tide no matter whether the peak-valley electricity price is considered.（b）The optimal variable speed operation by means of variable frequency drive is better than optimization of blade-adjusting operation only while the daily-average pumping head is below 5.0 m and the pump is not with the total water amount.（c）While comparing with that of fixed blade angle and constant speed,the benefits brought about by optimization of variable speed operation cannot compensate the energy consumption of variable frequency drive with the total water amount.Meanwhile,according to the mechanism of pump system, the argument is proved that better benefits of large-scale pumping station can be obtained by optimization of variable speed operation by means of variable frequency drive only while the pumping heads in a water transfer process has a large variation,which could provide theoretical basis for the renovation and optimal operation of large-scale pumping station in Eastern Route Project of S-to-N Water Diversion Project.
出处
《排灌机械工程学报》
EI
2010年第5期434-438,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
'十一五'国家科技支撑计划重大项目(2006BAB04A03)
国家自然科学基金资助项目(60974099)
江苏省属高校自然科学重大项目(09KJA570001)
教育部博士点基金资助项目(20093250110002)
关键词
泵站
试验选优
动态规划
运行模式
适应性
pumping station
experimental optimization
dynamic programming
operation mode
adaptability
