| 摘要 |
The invention relates to electric engineering. A power supply system for complex comprises a current source, a current meter, a voltage meter, a controlled high frequency harmonic current filter, a control system for the high frequency harmonic current filter, a furnace transformer aggregate comprising in series connected autotransformer having a supplementary winding, and a furnace transformer, to whose terminals an arc electric furnace is connected. According to the invention, the buses of furnace sub-station, a frequency converter, a mode set unit, capacitor batteries, a metal ladle treatment aggregate and a frequency converter control system are introduced. To the power source the buses of furnace sub-station are connected through the current meter, to which the controlled high frequency harmonic current filter is connected, which is connected to the control system, whose inputs are connected to the current meter and voltage meter, which is connected to the furnace substation buses. To the furnace substation buses the furnace transformer aggregate is connected, to whose supplementary winding the frequency converter is connected, whose middle terminal is connected to the electrode contacting to liquid metal placed into a metal ladle treatment apparatus. Another two terminals of the frequency converter are connected to the electrodes of metal ladle treatment apparatus, between the middle terminal and another two outputs of the frequency converter capacitor batteries are connected. The frequency converter is connected to the output of frequency converter control system, whose inputs are connected to the outputs of current meter, voltage meter and a mode set unit. Smooth adjustment of reactive power in the power supply system provides increase in stability and uniformity of system operation. |
