Flow coordinated operation control method for series cascade hydropower stations

By using the coordinated flow operation control method of series-connected cascade hydropower stations, combined with load distribution and regulation modules, the problem of mismatch between the development and utilization of ultra-high head hydropower resources and flow was solved, and the stable operation and flow coordination of the cascade hydropower stations were achieved.

CN119593931BActive Publication Date: 2025-09-30TIANJIN UNIV
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Patent Information

Application Number
CN202411616965.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-13
Publication Date
2025-09-30
Estimated Expiration
2044-11-13

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively develop and utilize ultra-high head water resources, and when the flow rates of series-connected cascade hydropower stations are mismatched, it is easy to cause water level fluctuations in the regulating pond, affecting the normal operation of the system.

Method used

A flow coordinated operation control method for series-connected cascade hydropower stations is adopted. Through a load distribution method for each unit based on the flow coordination principle of cascade power stations, combined with a PID speed regulator and proportional control module, the guide vane opening of the unit is adjusted in real time to achieve flow coordination.

Benefits of technology

Under planned and unplanned load adjustments, flow coordination and stable operation among cascade power stations are ensured, which improves the response speed and safety of the system.

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Abstract

The present invention discloses a flow coordinated operation control method for a series of cascade hydropower stations, including responding to a planned load adjustment instruction from the power grid, distributing the load of each unit based on the principle of flow coordination of the cascade power station, obtaining the unit guide vane opening in a stable state as the target guide vane opening, and then linearly opening / closing the current unit guide vane opening to the target guide vane opening; or responding to an unplanned load disturbance from the user end, adding a proportional adjustment module to the PID speed regulator, and performing real-time regulation of the unit guide vane opening according to the flow deviation of the upper and lower hydropower stations, thereby achieving regulation of the unit output. The present invention is used to maintain the flow coordination between cascade power stations after a planned load adjustment or an unplanned small load disturbance occurs in the cascade power station, ensuring that the power station can meet the flow coordination requirements during normal operation.
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