Due to the development and expansion of cascade power plants in the upper and lower reaches of the basin, the flow rate increased during the dry season, and the low-head operating conditions of the power plant increased significantly. The operating conditions of the unit changed and it was difficult to reach the rated output. In order to ensure the safe operation and economic benefits of the power plant, the runner of the bulb tubular turbine unit was technically modified and various stability tests and analyzes were conducted on the modified unit; the test results showed that all operating indicators met the requirements. The unit operated stably under the modified design conditions and achieved the expected purpose of the turbine technical transformation. Suggestions were made for the safe and stable operation of the unit based on the operation conditions.
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Junhong Hou (2024) studied this question.
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