Large hydraulic turbines stationary guide blade synchronous regulation and control method

Abstract

The invention discloses an adjustment and control method for the synchronism of guide vanes of a large-scale water turbine, comprising the following steps: the resistance value of a drive coil of a servomotor is measured and then accurately defined in a single guide vane controller; the zero position and the full scale of a single guide vane instruction of the single guide vane controller are adjusted; a guide vane in the single guide vane controller synchronously controls adjustment of the zero position and the full scale of the instruction; the zero position and the full scale of a guide vane opening displacement sensor are adjusted; the vane mechanical bias voltage is measured and adjusted; the control parameter of the single guide vane is set; the synchronous control parameter of the guide vane is set; the starting time and the closing time of the guide vane are measured and adjusted; a single guide vane displacement transmitter gives a failure alarm; a single guide vane control loop gives an alarm; and an overall guide vane control loop gives an alarm. The adjustment and control method improves the control precision of guide vanes of a hydropower generating unit; the deviation of the opening instruction and the feedback is small; the action synchronism of the guide vane is good; both the starting time and the closing time of the guide vane meet the design requirements; the maximum deviation of the switching time is better than that of the standard requirement.

Description

Technical field: [0001] The invention relates to a method for adjusting and controlling the guide vane of a water turbine of a hydroelectric unit, in particular to a method for adjusting and controlling the synchronization of guide vanes of multiple actuators in a large-scale pumped storage power station. Background technique: [0002] With the rapid development of the economy, the demand for electricity is also increasing day by day. In particular, thermal power is relatively small in investment and has a short construction period. Therefore, it has developed rapidly, and nuclear power units have also set off a construction boom in coastal areas. But such an energy structure also brings some consequences. First, the peak-to-valley difference of the power grid is getting bigger and bigger, and the pressure on peak regulation is increasing sharply. Slow and the efficiency of the unit decreases when the load changes, which requires a large increase in the adjustment capacity f...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a method for adjusting and controlling the synchronization of the guide vanes of large water turbines to solve the problem of the synchronization of the guide vanes in view of the deficiencies of the prior art

[0005] The present invention aims at the single guide vane control logic commonly designed at present, and provides the steps and methods of guide vane adjustment in the debugging process

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