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Control method and system combining guide vane opening analog quantity closed-loop and segmented open-loop control

A guide vane opening, open-loop control technology, applied in the control algorithm type, integral algorithm, machine/engine and other directions, can solve the problem of slow active power adjustment, static deviation in opening control, easy to be affected by water hammer reaction and unit failure. Inertia, etc.

Active Publication Date: 2021-04-06
CHINA YANGTZE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a control method and system that combines the closed-loop control of the guide vane opening analog quantity and the segmented open-loop control in the opening mode of the hydropower station monitoring system, aiming at solving the problem of adopting the power closed-loop conventional pulse adjustment method in the opening mode. When the active power adjustment speed is slow, the adjustment process is easily affected by the water hammer reaction and the inertia of the unit, and in the pure open-loop control mode, there is a deviation in the data table corresponding to the water head, active power and guide vane opening, resulting in a static deviation in the opening control And other issues

Method used

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  • Control method and system combining guide vane opening analog quantity closed-loop and segmented open-loop control
  • Control method and system combining guide vane opening analog quantity closed-loop and segmented open-loop control
  • Control method and system combining guide vane opening analog quantity closed-loop and segmented open-loop control

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Embodiment 1

[0130] A control method and structure combining closed-loop and open-loop control of the opening mode guide vane opening analog value of a hydropower station monitoring system. This method is based on the corresponding data table of water head, active power and guide vane opening. The new method of leaf opening analog control signal is aimed at solving the problem of adopting power closed-loop conventional pulse adjustment mode in opening mode, the active power adjustment speed is slow, the adjustment process is easily affected by water hammer reaction and unit inertia, and the pure open-loop In the control mode, deviations in the corresponding data tables of water head, active power and guide vane opening lead to problems such as static deviation in opening control, so as to realize fast, accurate and stable control of the guide vane opening and active power of the unit, and improve the regulation quality.

[0131] The open-loop control of the guide vane opening is especially...

Embodiment 2

[0163] In order to further improve the quickness of the adjustment process and avoid the problem of excessive overshoot caused by too fast adjustment speed, a control method combining closed-loop and open-loop control of the guide vane opening analog quantity in the opening mode of the hydropower station monitoring system Optimize and improve on the basis of structure and structure, realize segmental open-loop control, and form a control method and structure that combines closed-loop control of the opening mode guide vane opening analog value of hydropower station monitoring system and segmental open-loop control. This method is based on the data table corresponding to water head, active power and guide vane opening. The brand-new method of analog control signal of guide vane opening is aimed at solving the problem of adopting power closed-loop conventional pulse adjustment mode in opening mode, the adjustment speed of active power is slow, the adjustment process is easily affe...

Embodiment 3

[0204] In order to further improve the performance and quality of the small or terminal adjustment of the guide vane opening and active power of the unit, a control method and structural basis for the combination of closed-loop control and segmented open-loop control of the guide vane opening analog quantity in the opening mode of the hydropower station monitoring system Optimization and improvement are carried out on the above to realize segmental open-loop control, forming a control method and structure that combines variable integral closed-loop control with segmental open-loop control in the opening mode of the hydropower station monitoring system.

[0205] This method is based on the corresponding data table of water head, active power and guide vane opening. In the opening mode, the corresponding data table is checked, and the method of combining segmented open-loop control and variable integral closed-loop control is used to quickly and accurately adjust the active power ...

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Abstract

The invention discloses a control method and system combining guide vane opening analog quantity closed-loop and segmented open-loop control. The method is a brand-new method of rapidly and accurately adjusting active power of a unit and outputting a guide vane opening degree analog quantity control signal in an opening degree mode based on data tables corresponding to a water head, the active power and guide vane opening degree by adopting a mode of combining corresponding data table checking, open-loop control and closed-loop control, and aims to solve the problems that a conventional power closed-loop pulse regulation mode is adopted in an opening degree mode, the active power regulation speed is low, the regulation process is easily influenced by water hammer reaction and unit inertia, and static deviation of opening control is caused by deviation of the data tables corresponding to the water head, the active power and the guide vane opening degree in a pure open-loop control mode and the like, rapid, accurate and stable control over the guide vane opening and the active power of the unit is achieved, and the regulation quality is improved.

Description

technical field [0001] The invention belongs to the technical field of computer monitoring of hydropower stations, and in particular relates to a control method and a system combining closed-loop control and segmented open-loop control of opening mode guide vane opening of a monitoring system of a hydropower station. Background technique [0002] At present, during the operation of the hydro-generator set, the monitoring system in the opening mode usually adopts the power closed-loop conventional pulse adjustment method, and through the intermediate relay, the output opening increase and decrease pulses are sent to the electronic control system of the governor to realize the control of the hydro-generator set Opening control. For the control method, please refer to the Chinese invention patent "A Active Power Pulse Regulation System for LCU of Hydropower Station Units", (patent number: ZL201610327273.6). This method uses interpolation algorithm and corrected proportional al...

Claims

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Application Information

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IPC IPC(8): F03B15/06F03B15/16H02J3/48
CPCF03B15/06F03B15/16H02J3/48F05B2270/703Y02E10/20
Inventor 涂勇
Owner CHINA YANGTZE POWER
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