Abstract: Invention and development of a laser tracker system in this work realizes precise survey in the installation of hydraulic turbine generator units, and triggers a new achievement of installing quality and productivity higher than ever. The laser tracking technique has been widely employed for the installation project of the Wudongde hydraulic turbine generator units. For this project, we made secondary software development and a special design of measuring tools, and promoted its laser tracker system to meet the technological requirement by its construction process. This technique has achieved a higher accuracy, better reliability and higher productivity at its construction site, compared with the traditional surveying method and based on the survey data of its generator units installation. We demonstrate the potential of technological innovation through application of this new laser tracking technique, and emphasize the importance and difficulty in formulating a series of new flow schemes and organization modes of the installation and construction of hydraulic turbine generator units.

Key words: precise survey, laser tracker, hydraulic turbine generator units, installation, accuracy and reliability, productivity