| Changchun three hot original induced draft fan with constant speed operation, use the fan inlet vane control of flue gas in order to stabilize the furnace negative pressure. Access tothe actual operation of the actual air close to design air fan, but the actual operation is far less than the design pressure head pressure head is not high, induced draft fan in the fan efficiency is low. Because the wind turbines operating in a frequency fixed speed, at both ends of the pressure caused by large throttling loss. At the same time, fan motor when starting, starting current of the motor rated current of 8-10 times, on the one hand, the impact of the electricity, service life and strong impact torque of the motor and fan has adverse effects.By using variable frequency energy saving reconstruction of fan, can achieve the purpose of energy saving, eliminate the damaging impact torque motor starting current of fan,motor, improve the fan efficiency, prolong the service life of the motor, fan, reduce the workamount of repair personnel, reduce repair costs, and enhance the stability of automatic device system, provide reliable guarantee for the economic operation optimization system.In 1, No.2 unit of wind power supply loop are respectively provided with two adaptation of 3700KW high voltage inverter, inverter adopts "unit series multi-level structure of directhigh-voltage output, the converter has a minimum of harmonic pollution, high input power factor, output waveform has the advantages of good quality, there is no harmonics caused by electric motor additional heating, torque ripple, noise and other issues. According to theChangchun third thermal power plant 2* 350MW unit over the years, the power generation capacity and operating hours statistics, after the completion of the transformation can save electricity 4780900 kwh. |
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