A speed control method and system for a large-scale impulse hydroelectric generator
By introducing a flow control mode into the giant impulse hydropower unit, the problems of low-frequency oscillation and mechanical component fatigue in the traditional governor control mode have been solved, realizing the dynamic stability of the system and extending the life of mechanical components, thereby improving the grid frequency support capability and computing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NARI TECH CO LTD
- Filing Date
- 2026-04-03
- Publication Date
- 2026-07-17
AI Technical Summary
The governor control mode of giant impulse hydropower stations exhibits limitations under traditional modes, which leads to the frequency control logic being deeply coupled with the water hammer effect of the water diversion system, inducing low-frequency oscillations, increasing the difficulty of power grid dispatching, and accelerating the fatigue wear of mechanical components.
By adopting a flow control mode, a simulation model of the dynamic characteristics of nonlinear turbines, elastic water hammer, and generators is established. Flow rate is used as a control parameter to reduce the negative effects of nonlinearity between nozzle opening and overflow, and the control logic of the flow regulation mode is established.
It significantly enhances the dynamic stability of the system, has better damping characteristics than the traditional frequency regulation mode, reduces fatigue wear of mechanical components, improves computing efficiency, and ensures the stability of unit operation and the frequency support capability of the power grid.
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Figure CN122407446A_ABST