|
|
|
| Improved Suter-transformation for complete characteristic curves of pump-turbine |
| Zheng Xiaobo, Tong Huanzhen |
| Institute of Water Resources and Hydro-Electric Engineering, Xi′an University of Technology, Xi′an, Shaanxi 710048, China |
|
|
|
|
Abstract The complete characteristic curves of pump turbines appear "S" type at both pump and anti-pump working conditions. The multi-value characteristic of unit discharge and unit moment of the curves due to crossover and overlap phenomena can cause inconvenience for transition process analysis. Applying the method of improved Suter-transformation, the complete characteristic curves of the pump turbine can be transformed into two groups of periodic variation curves in the four quadrants, namely the WH(x,y)and WM(x,y)curves. The complete characteristic curves of the pump turbine were carried out for transformation based on the same curve characteristic of existing data, then the transformed fitting WH curve and WM curve were obtained by adopting the mathematical model of least square surface. Therefore, a three-dimensional surface was achieved containing the two curves. The WH curve and WM curve after transformation using improved Suter-transformation are smoothing and approximately parallel to each other, and therefore the multi-numerical values and nonuniform distribution defects of Suter-transformation curves can be avoided. So, it is possible to eliminate the crossover and overlap characteristics under the pump and the reverse-pump conditions, and improve the nonuniform distribution phenomenon at the two ends of the pump-turbine complete characteristic curve, thus it is conveni-ent for the transition process analysis of pump-turbines.
|
|
Received: 01 October 2012
|
|
|
|
| [1]陆佑楣,潘家铮.抽水蓄能电站[M].北京:水利电力出版社,1992:534-587.[2]Suter P. Representation of pump characteristics for calculation of water hammer[J]. Sulzer Technical Review, 1966(11): 45-48.[3]王林锁. 抽水蓄能电站水力过渡过程调节控制研究[D].南京:河海大学水利水电学院,2005:49-56.[4]邵卫云,张雄.水泵水轮机全特性曲线的拟合-移动最小二乘近似[J].水力发电学报,2004, 23(5):102-106. Shao Weiyun, Zhang Xiong. A new simulation method of complete characteristic curves of reversible pump turbine-moving least square approximation[J]. Journal of Hydroelectric Engineering, 2004, 23(5):102-106.(in Chinese)[5]蔡铁力.可逆式水泵水轮机全特性曲线处理及可视化研究[D].扬州:扬州大学水利科学与工程学院,2009:20-28.[6]刘光临,蒋劲,符向前. BP神经网络法预测水泵全性能曲线的研究[J].武汉水利电力大学学报,2000,33(2):37-39. Liu Guanglin, Jiang Jing, Fu Xiangqian. Predicting complete characteristics of pumps by using BP neural network[J]. Journal of Wuhan University of Hydraulic and Electric Engineering, 2000, 33(2):37-39.(in Chinese)[7]杨琳,陈乃祥.水泵水轮机转轮全特性与蓄能电站过渡过程的相关性分析[J].清华大学学报:自然科学版,2003,43(10):34-37. Yang Lin,Chen Naixiang. Analysis of relation between characteristics of pump-turbine runner and transition of pumped-storage power station[J]. Journal of Tsinghua University:Science and Technology, 2003, 43(10): 34-37.(in Chinese)[8]朱艳萍. 基于特性曲线的水轮机内特性参数研究[D].北京:中国农业大学水利与土木工程学院,2006.[9]王伦其. 可逆式水泵水轮机过渡过程计算的研究[J]. 东方电气评论,2000,14(4):191-226. Wang Lunqi. Study on transient calculating of pump-turbine installations[J]. Dongfang Electric Review, 2000,14(4): 191-226.(in Chinese)[10]梅彦祖. 抽水蓄能发电技术[M]. 北京:机械工业出版社,2000:200-216.[11]常近时. 水力机械过渡过程[M]. 北京:机械工业出版社,1991:215-232. |
|
|
|
