Analysis of the loss in the hydroelectric power plant of the Pelton Turbine Hydro-Power plant: A Case Study of Huay Lamphan Yai Dam, Sekong Province, Lao PDR

Abstract

This article was to study the power loss in the power plant system at Huay Lamphan Yai Dam. the dam was a medium-sized hydroelectric dam with the height level of 611.86 meters using the Pelton turbine and the electric generator with the maximum capacity of 88 megawatts. the dam has a total of two generators sets. For the experiment, the electric generator was started running one by one, there was found that the water flow rate at 9.00 cubic meters per second affected the maximum power loss in various parts. In addition, the experiments for the first and the second electric generator were the same results. There were shown that the power loss at the water pipe system was equal to 16.34%, the power loss at the nozzles  was equal to 2.69%, the power loss at the turbine blades  was equal to 16.91%, and the power other losses namely include dispersion losses in turbine tanks, Generator loss and shaft loss between generator and turbine were equal to 64.11%, Moreover, for the experiment, both electric generators were started running together. There was found that the water flow rate at 18.00 cubic meters per second affected the maximum power loss in various parts of both generators. There were shown that the power loss at the water pipe system was 19.69%, the power loss at the nozzles was 2.60%, the power loss at the turbine blades was 16.34%, and the power other losses namely include dispersion losses in turbine tanks. Generator loss and shaft loss between generator and turbine were equal to 61.40%.