Problem: There was serious cavitation problem at the blade outlet and it needed to be stopped and polished every year, affecting seriously the power station operation.
New runner model: HLGT153A-LJ-150
Meanwhile, the new runner efficiency improved compared to the old one at load range of 40%-110%, and the efficiency at rated point increased 5% and weighted efficiency increased 7%. The maximum output increased from 15.13 MW to 16.17MW at 0.56 m head, and also the unit stability is improved and noise level is reduced.
