The automatic operation flow of the monitoring system for the transition of the hydroelectric generating unit from cold standby to repair and drainage to the spiral case and tail horizontal pressure

By designing an automated operation process, the complexity and safety hazards of switching hydropower station units from cold standby to maintenance and draining water to the level of the spiral casing and tail section were solved, achieving efficient and safe equipment operation and improving the power plant's production management level.

CN116608083BActive Publication Date: 2026-01-16CHINA YANGTZE POWER
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Patent Information

Application Number
CN202310537238.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-14
Publication Date
2026-01-16
Estimated Expiration
2043-05-14

AI Technical Summary

Technical Problem

During the process of switching a hydropower station unit from cold standby to maintenance and draining water to the horizontal pressure of the spiral casing and tail section, the existing technology has many operation steps, is time-consuming and labor-intensive, and the failure of equipment operation interlock may lead to system grounding or equipment damage, affecting the safe and stable operation of the power grid.

Method used

Design an automated operation procedure for a monitoring system. Through program conditional execution judgment, automatically execute equipment operations such as switching the generator set from cold standby to maintenance and draining water to the horizontal pressure of the volute and tail section. This includes the automatic control of equipment such as outlet switches, isolating switches, and grounding switches, ensuring that the operation sequence is accurate and error-free.

Benefits of technology

It shortened the operation time, reduced the burden on operators, ensured the accuracy of the operation process and the safety and stability of the power grid, and improved the safety production management level of the power plant.

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Abstract

The application discloses a water power station unit automatic operation process from cold standby to maintenance and drainage to a volute and tail horizontal pressure monitoring system, which comprises receiving a start order; sending a quick closing instruction to a unit water inlet quick door; sending a full opening technical water supply positive and negative water supply valve instruction to a unit technical water supply control cabinet; sending a full opening pressure reducing valve inlet and outlet valve instruction to the technical water supply control cabinet; sending a full opening technical water supply filter inlet and outlet valve instruction to the technical water supply control cabinet; sending a generator outlet switch from cold standby to maintenance instruction to the unit; sending a generator and transformer group outlet switch from cold standby to maintenance instruction to the unit; and ending the operation process after detecting that the unit technical water supply total flow is less than 50m³ / s. The application improves manual step-by-step operation into an automatic operation process, avoids system live grounding or equipment damage caused by equipment lockout failure, ensures the accuracy of the whole operation process, ensures the safety and stability of the power grid, improves work efficiency and saves human resources.
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