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| Realization of variable frequency speed control function of four mine ventilator |
| Yang Jin |
| Jinneng holding coal group Sitai mine, Datong 037000, China |
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Abstract In order to solve the problem of poor control effect and serious waste of electric energy of four mine ventilators, the advantages and disadvantages of various speed regulation modes are comprehensively compared, and the general idea of using frequency conversion speed regulation mode for the transformation of four mine ventilator control system is finally determined. Based on Simulink software, it is verified that the response time of variable frequency speed regulation vector control is only 0.2 s, and the fluctuation range is only 0.1 %. According to the demand of field ventilation, the specific models of frequency converter and PLC controller are determined. The practice shows that after the frequency conversion speed regulation transformation of the fan system in Sitai Mine, the soft start and wide range speed regulation of the fan are realized, the control effect of the fan is improved, and the annual energy saving is about 1.3086 million yuan, and the energy saving effect is remarkable.
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