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Self-correcting and self-adapting control method of water head and no-load opening degree combination curve of speed governor

A technology of adaptive control and no-load opening, which is applied in the direction of hydropower, machine/engine, engine components, etc., can solve the problem of unreasonable setting of the association curve between the water head of the governor and the no-load opening, and achieve real-time Self-correction and self-adaptive function, the method is simple, efficient and feasible, and the effect of improving the level of intelligent automation

Active Publication Date: 2018-10-26
CHINA YANGTZE POWER
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Problems solved by technology

The present invention is applicable to the hydropower generating set that uses the water head and the no-load opening to carry out the electrical control of the governor. A series of unit operation problems

Method used

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  • Self-correcting and self-adapting control method of water head and no-load opening degree combination curve of speed governor
  • Self-correcting and self-adapting control method of water head and no-load opening degree combination curve of speed governor

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Embodiment Construction

[0041] If the set water head and no-load opening association curve is distorted, it will affect the start-up performance and mode switching performance of the unit, resulting in long start-up time or excessive frequency overshoot, excessive opening disturbance when switching from manual to automatic mode, or even resulting in failure to boot. The invention relates to a self-correcting adaptive control method for the associated curve of the water head of the governor and the no-load opening degree, which is a real-time self-correcting control method for the associated curve of the water head of the governor and the no-load opening degree when the unit is connected to the grid. Revised adaptive governor electrical control method. The present invention is applicable to the hydropower generating set that uses the water head and the no-load opening to carry out the electrical control of the governor. A series of unit operation problems.

[0042] A method for self-correcting and a...

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Abstract

A self-correcting and self-adapting control method of a water head and no-load opening degree combination curve of a speed governor comprises the steps of initializing a system, and reading original data, supplied by a main machine factory, of the water head and no-load opening degree combination curve; detecting whether the unit speed governor is started for the first time; if the unit speed governor cannot enter a no-load state, automatically accumulating the no-load opening degree corresponding to a current water heat through an electric control system of the speed governor based on a certain period T and a certain step length Y until the unit speed governor can normally enter the no-load state; if the unit speed governor enters the no-load state and the unit frequency is stably close to 50Hz, recording the current water head h and the no-load opening value y; correcting a water head and no-load opening degree combination curve table for the first, and releasing the shielding to theuptime time out fault; and correcting the water head and no-load opening degree combination curve table in real time. The method aims at solving a series of unit running problems caused by unreasonable setting of the water head and no-load opening degree combination curve of the speed governor in the unit parallel operation process.

Description

technical field [0001] The invention belongs to the field of automatic control of hydropower stations, and relates to a self-correcting and adaptive control method for the association curve of the water head and the no-load opening degree of a governor. Background technique [0002] At present, during the operation of the hydro-generator set, the associated curve of the water head of the governor and the no-load opening degree is set according to the data provided by the main engine manufacturer. However, the data provided by the main engine manufacturer is the theoretical data obtained through comprehensive calculation after model tests, which often do not match the actual operation of the real machine. Real-time self-correction and self-adaptation of operating conditions. If the associated curve of water head and no-load opening of the set governor is distorted, it will affect the start-up performance and mode switching performance of the unit, resulting in too long start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B15/00
CPCF03B15/00Y02E10/20
Inventor 涂勇杨刚
Owner CHINA YANGTZE POWER
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