Intelligent control system of impulse water turbines

Abstract

The invention discloses an intelligent control system of impulse water turbines. The intelligent control system comprises a speed controller PLC and a stacked hydraulic servo device. The stacked hydraulic servo device comprises needle control units connected with needles correspondingly and deflector control units connected with deflectors correspondingly. The needle control units and the deflector control units are connected with the speed controller PLC. The output end of the speed controller PLC is connected with an opening side electromagnetic valve and a closing side electromagnetic valve of each needle switching valve through a power amplifier. Each needle switching valve controls an opening cavity and a closing cavity of a needle servomotor through a needle electrohydraulic converter. The invention provides the control system characterized by simple structure and high reliability and suitable for multi-needle and multi-deflector impulse units; with the unit type structural design, the digital water turbine speed adjusting system is characterized in that the hydraulic control systems of the needles and the deflectors are designed as completely identical and independently-controlled digital hydraulic units, so that intelligent hydropower station establishment is realized.

Description

technical field [0001] The invention belongs to the control field of water turbines in hydropower stations, and in particular relates to an intelligent control system for impact water turbines. Background technique [0002] Pelton turbines are mainly suitable for hydropower stations with high water head and low flow rate. Such units have long diversion pipes and large inertial time constants of water flow, which can easily cause the speed and water pressure to be too high when the unit rejects load, resulting in poor regulation quality. In order to avoid these unfavorable factors, in addition to the nozzle needle that normally adjusts the flow, the impact turbine is also equipped with a deflector mechanism that quickly cuts off the water flow, so as to reduce the turbine torque and speed increase accordingly. The nozzle needle that normally adjusts the flow rate can also slowly adjust the nozzle opening to prevent the water pressure in the pipeline from rising too high. [...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problem that the existing hydraulic turbine control technology is likely to cause the nozzle control failure, and the nozzle control device is bulky, which is not convenient for production, installation and maintenance, and provides an impact type hydraulic turbine intelligent control system. The system is simple in structure and reliable. High, high integration, easy to adjust, easy to operate, convenient maintenance

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