变-定速抽水蓄能机组混合式布置对甩负荷过渡过程的影响  

Influence of Mixed Arrangement of Variable-constant Speed Reversible Units on Load Rejection Transition Process

作　　者：胡超[1] 陈胜[1] 柏家串 宫亚茹 张健[1] HU Chao;CHEN Sheng;BAI Jia-chuan;GONG Ya-ru;ZHANG Jian(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Kunshan Water Engineering Quality and Safety Supervision Station,Suzhou 215300,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]昆山市水务工程质量与安全监督站,江苏苏州215300

出　　处：《水电能源科学》2023年第12期190-194,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51879087,51839008)。

摘　　要：目前尚缺少较复杂的多洞多机输水系统下变-定速机组混合式布置对甩负荷过渡过程影响的研究。基于一维管道瞬变流理论,采用特征线法建立了“引水两洞四机、尾水四机一洞”的变-定速抽水蓄能机组水力过渡过程数学模型,并结合实际工程算例探讨了甩负荷工况下变-定速机组混合式布置对调节保证参数的影响。结果表明,相比于变速机组分布于不同引水主洞的布置方案,两台变速机组布置于同一引水主洞方案下甩负荷过渡过程中的调节保证参数在发电效率较高区内更为安全。At present,the issue on the influence of mixed arrangement of variable and constant speed units on the load rejection transition process under the complex water delivery system with multi-units sharing multi-tunnels is scarce.Based on the transient flow theory of one-dimensional pipeline,this paper established the mathematic model of hydraulic transition process of variable-constant speed pumped storage units that four units share two tunnels in the diversion system and one tunnel in the tailrace system by using the characteristic method,and discussed the influence of the mixed arrangement of variable and constant speed units on regulation guarantee parameters under the load rejection condition by combining with practical engineering examples.The results show that regulation guarantee parameters during the load rejection transition process under the layout of two variable speed units sharing one diversion hole are safer than those under the layout of variable speed units sharing different diversion holes in the region with higher power generation efficiency.

关 键 词：可变速抽水蓄能机组 混合式布置 甩负荷过渡过程 发电效率 调节保证参数 

分 类 号：TV743[水利工程—水利水电工程]