基于LabWindows CVI的水轮机流量效率测试系统  

Development of flow rate-hydro turbine efficiency testers based on LabWindows CVI

作　　者：刘冬[1] 肖志怀[1] 陈光大[1] 王邦旭 

机构地区：[1]武汉大学水力机械过渡过程教育部重点实验室,武汉430072

出　　处：《水力发电学报》2017年第11期13-22,共10页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51379160)

摘　　要：水轮机效率是机组运行的重要参数,但效率无法直接测得。对水轮发电机组来说,只能通过流量和其他参数计算得出。因此,流量的精确测量对水轮机效率的计算结果准确性至关重要。本文基于流速仪法的测流原理和LabWindows CVI平台,根据相关试验规程和实际需要,设计开发了一套适用于水轮机多工况的流量效率测量仪。实际电厂测试验证了仪器的可行性和测量的精确性,测试结果表明,该仪器测得的水轮机流量与效率与实际值相符,并且大大减少了计算量,具有较好的应用和推广价值。Operation efficiency is a key design parameter of hydro turbine units, but it cannot be directly measured and has to be calculated through the measurement of flow rate and other related parameters. Therefore, precise measurement of flow rate is crucial to improvement on its calculation accuracy. In this work, we have developed an efficiency tester of hydro turbine units working in various loading conditions, using the current meter method and a Lab Windows CVI platform. The testing is consistent with the related test procedure and can meet the practical needs of turbine unit tests. Application of the tester in power plants validated its feasibility and accuracy. The results indicate that the measurements of flow rate agree well with its real values, and that this new tester can save a large amount of calculation and thus is worth wide application.

关 键 词：自动化 LABWINDOWS CVI编程 流速仪法 流量测量 效率计算 

分 类 号：TV734[水利工程—水利水电工程]