Guide vane opening analog quantity segmented open-loop control and speed regulator 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 hydropower station monitoring system guide vane opening analog quantity segmented open-loop control and speed regulator PID closed-loop control combined control 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, a guide vane opening degree analog quantity control signal is output, a speed adjusting system adopts a PID closed-loop control mode, a hydraulic servo system control signal is output, the guide vane opening degree analog quantity control signal and the hydraulic servo system control signal are combined to quickly and accurately adjusting the active power of a unit, the problems that a power closed-loop conventional pulse adjusting mode is adopted in an opening degree mode, the active power adjusting speed is low, the adjusting process is easily influenced by the water hammer reaction and the unitinertia effect, in a pure open-loop control mode, consequently static deviation exists in opening degree control due to the fact that the water head, active power and guide vane opening degree corresponding data table have deviation 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 of a governor. 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 pro...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a control method combining segmental open-loop control of the guide vane opening analog value of the hydropower station monitoring system and PID closed-loop control of the governor and the system, aiming to solve the problem of the closed-loop conventional pulse regulation of power in the opening mode, the slow speed of active power regulation, the regulation process is easily affected by the water hammer reaction and the inertia of the unit, and the pure open-loop control method, the water head, active power Deviations in the data table corresponding to the opening of the guide vane lead to problems such as static deviation in the opening control; at the same time, it suppresses the phenomenon of serious overshoot caused by too fast adjustment speed, and improves the performance and performance of the small or terminal adjustment of the guide vane opening and active power of the unit. Quality, to realize the rapid, accurate, stable and real-time control of the guide vane opening and active power of the unit, and improve the regulation quality

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