基于量热法的水电机组发电机效率试验研究

在水电工程现场,发电机效率试验受到现场安装条件的限制和测试时间的要求,很难有效和及时的开展,针对这种现状,本文简要介绍了基于量热法的发电机效率测试原理,再结合发电机效率试验中关键技术难点,如冷却管路的改造如何满足流量测量的要求、分项损耗的计算与总体损耗的校核与验证,以及试验过程和时间的组织计划等问题,提出了优化和解决方案,最后通过在西非科特迪瓦苏布雷电站的测试实施,证明优化设计方法具有良好的操作性和有效性,可为其他海外水电工程的发电机效率测试提供实施参考和技术依据。

Research of generator efficiency test in hydropower project based on calorimetric method

In recent years, a large number of overseas hydropower projects have been designed and constructed by domestic hydro enterprises, some of which have been in commissioning and acceptance period, and the test and verification of generator efficiency has become a key part during the period. However,the generator test has been limited by field installation condition and test time arrangement, and it is difficult to carry out. The paper introduces the generator efficiency test principle based on calorimetric method,then discusses and gives optimized solutions for some key technologies and difficulties, including modification of cooling pipes, segregated losses calculation, and test procedure arrangement. With a test example carried out in Soubre hydropower plant of Coast Ivory,it proves that the solution and test scheme can meet the requirement of IEC regulation strictly, and have good consistency and validity, which can provide technical support for other similar tests or needs of hydropower projects.