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Hydroelectric generating set power control method adopting PI control to adjust given opening degree

A technology for hydropower unit and power control, which is applied to control generators, control algorithm types, control systems, etc. It can solve the problems of frequent relay actions, insufficient active power regulation, large overshoot, etc., and improve the active power regulation rate of the unit. and adjustment accuracy, improve stability and anti-interference ability, and avoid the effect of overshoot

Pending Publication Date: 2021-12-31
CHINA YANGTZE POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large inertia of active power adjustment, when an adjustment pulse is sent out, it is necessary to wait for the power adjustment to be in place before sending out the next adjustment pulse. Therefore, it takes a long time for the power adjustment to be in place. overshoot
There are two relays on the monitoring system side and the speed regulating system side using pulse regulation. During the active power regulation process, the relays operate frequently. If the relay is damaged, the monitoring system cannot judge and cannot switch to the active power open-loop mode in time, resulting in active power regulation Not in place or misadjusted

Method used

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  • Hydroelectric generating set power control method adopting PI control to adjust given opening degree
  • Hydroelectric generating set power control method adopting PI control to adjust given opening degree
  • Hydroelectric generating set power control method adopting PI control to adjust given opening degree

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Embodiment Construction

[0028] Such as figure 2 As shown, the hydroelectric unit power control method of the embodiment adopts the closed-loop control mode, and the opening degree is given by calculation, which is input to the governor to adjust the active power of the hydroelectric unit; the control unit of the hydroelectric unit power control method of the embodiment includes Sampling filter module, PI adjustment module, opening gain conversion module, opening given calculation module, opening given output module, fault judgment and processing module, conversion system query module.

[0029] The sampling filter module obtains the unit active power signal output by the unit power transmitter, filters the collected power signal, and inputs the filtered active power P to the PI adjustment module.

[0030] PI adjustment module, using active power to set P set Perform proportional integral operation with the filtered active power P to obtain the power given gain δ Pset , input to the opening gain con...

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Abstract

The invention relates to a hydroelectric generating set power control method adopting PI control to adjust the given opening degree. According to the method, a closed-loop control mode is adopted, a given opening degree value is calculated and obtained to be input into a speed regulator, and the active power of a hydroelectric generating set is adjusted. A control unit of the control method comprises a sampling filter module, a PI adjusting module, an opening gain conversion module, an opening given calculation module and an opening given output module. According to the set power control method, the set power given gain is calculated through proportional-integral control and converted into the given opening degree value of the speed regulator, and compared with an existing method for controlling the opening degree of guide vanes of the set through proportional regulation pulses, the set active power regulation rate and regulation precision in the guide vane opening degree control mode are improved. Large overshoot is avoided. When a speed regulation system breaks down, the open-loop control mode can be switched to, and set power regulation failure or wrong regulation when a monitoring system and the speed regulation system break down is avoided.

Description

technical field [0001] The invention belongs to the field of hydroelectric power generation control, and in particular relates to a power control method of a hydroelectric unit that adopts PI control to adjust a given opening degree. Background technique [0002] During the active power adjustment process of the hydropower unit, when the governor is in the opening mode and the monitoring system is in the active closed-loop mode, the monitoring system uses simple proportional adjustment to calculate the pulse duration and pulse interval time of increasing / decreasing the opening degree. The opening degree of the output adjustment governor is given, as attached figure 1 shown. Due to the large inertia of active power adjustment, when an adjustment pulse is sent out, it is necessary to wait for the power adjustment to be in place before sending out the next adjustment pulse. Therefore, it takes a long time for the power adjustment to be in place. of overshoot. There are two r...

Claims

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Application Information

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IPC IPC(8): F03B15/10F03B15/16H02P9/04H02J3/48
CPCF03B15/10F03B15/16H02P9/04H02J3/48F05B2270/705Y02E10/20
Inventor 张鹏艾远高向强铭夏国强黄家志余志强
Owner CHINA YANGTZE POWER
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