Guide vane opening analog quantity segmented open-loop control and speed regulator variable parameter PID closed-loop control combined control method and system

Abstract

The invention discloses a hydropower station monitoring system guide vane opening analog quantity segmented open-loop control and speed regulator PID closed-loop control combined control method and system. The method is based on a water head, active power and guide vane opening corresponding data table, in an opening mode, a monitoring system adopts a mode of looking up the corresponding data table and segmented open-loop control, the guide vane opening analog quantity control signal is output, a PID closed-loop control manner is adopted in a speed adjusting system, a hydraulic servo system control signal is output, the brand-new method for quickly and accurately adjusting the active power of a unit by combining the two aims to solve the problems that a power closed-loop conventional pulseadjusting manner is adopted in an opening manner, the active power adjusting speed is low, the adjusting process is easily influenced by the water hammer reaction and the unit inertia effect, the problems that in a pure open-loop control manner, the water head, active power and guide vane opening corresponding data table has deviation, and consequently static deviation exists in opening control are solved, and meanwhile the serious overshoot phenomenon caused by the excessively-high adjusting speed is restrained.

Description

technical field [0001] The invention belongs to the field of computer monitoring systems of hydropower stations, and in particular relates to a control method and system combining segmented open-loop control of guide vane opening analog values ​​of a hydropower station monitoring system and PID closed-loop control with variable parameters of governors. 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 alg...

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 segmental open-loop control of the guide vane opening analog value of the hydropower station monitoring system and PID closed-loop control with variable parameters of the governor. Conventional pulse adjustment mode, 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 under the pure open-loop control mode, the water head, active power and the guide vane opening corresponding data table have deviations, resulting in opening Control problems such as static deviation; at the same time, suppress the serious overshoot phenomenon caused by too fast adjustment speed, improve the performance and quality of the small or terminal adjustment of the guide vane opening and active power of the unit, and realize the rapid adjustment of the guide vane opening and active power of the unit Precise and stable real-time control to improve adjustment quality

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