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Control method of pid governor of differential priority turbine with anti-speed saturation

A control method and the technology of the governor, which are applied in the directions of engine control, control algorithm type, proportional-integral-derivative algorithm, etc., can solve the problems of divergence in the adjustment process, the decline of the system adjustment quality, and the lack of system stability, so as to improve the adjustment quality, The effect of improving system stability

Active Publication Date: 2019-02-01
XIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a differential-priority hydraulic turbine PID governor control method with anti-speed saturation, which solves the problem of system regulation quality degradation, insufficient system stability, and even divergence in the regulation process caused by speed saturation in the prior art. The problem

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  • Control method of pid governor of differential priority turbine with anti-speed saturation
  • Control method of pid governor of differential priority turbine with anti-speed saturation
  • Control method of pid governor of differential priority turbine with anti-speed saturation

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] In order not to lose generality, a simulation model of the hydraulic turbine regulation system is established considering nonlinear factors such as the speed limit of the servomotor, the position limit, and the saturation suppression of the governor position. The simulation principle block diagram is shown in figure 1 As shown, the water diversion system adopts rigid water hammer, and the turbine is an ideal turbine. The stroke limit of the pressure distribution valve (speed limit of the servomotor) and the stroke limit of the servomotor are considered in the follow-up system, and the suppression of the position saturation of the servomotor is considered in the regulator. .

[0031] In the regulator, it is necessary to discretize the control algorithm of the governor for calculation. The output value of the PID module is the sum of th...

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Abstract

The invention discloses a control method for a velocity-saturation-resisting PID speed controller of a differential priority water turbine. An output value of a PID module is the sum of output values of a proportional, an integration and a differential, and aiming at the velocity saturation of the proportional, the change rate of the output value of the proportional is limited between a starting speed and a shutdown speed of a servomotor; aiming at the velocity saturation of the integration, accumulation of the integration is stopped when the proportional speed is limited or an output amplitude value of an adjuster is limited; and because the saturation region RD formed by the differential is relatively small, the speed of the output value of the differential is not limited in order to ensure the lead correction effect of the speed controller. The control method for the velocity-saturation-resisting PID speed controller of the differential priority water turbine can improve the adjusting quality of a water turbine adjusting system, and improve the stability of the system.

Description

technical field [0001] The invention belongs to the technical field of hydraulic turbine regulating systems, and in particular relates to a control method for a differential priority hydraulic turbine PID governor capable of resisting speed saturation. Background technique [0002] Under the large-load disturbance of the isolated grid, the adjustment instability of the hydro-generator set occurs frequently. This problem has occurred in many hydropower stations such as Weituo Hydropower Station, Manla Hydropower Station, Majitang Hydropower Station, and Ruili River First-class Hydropower Station. After analysis, the main reason for this problem is that the speed of the servomotor of the governor is limited due to the requirement of regulation guarantee, so that the speed of the PID regulator is saturated, but this problem does not significantly affect the regulation quality when it is integrated into the large power grid. Therefore, the current turbine governor control method...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B15/00
CPCF03B15/00F05B2270/101F05B2270/328F05B2270/706Y02E10/20
Inventor 南海鹏门闯社
Owner XIAN UNIV OF TECH