| 摘要 |
FIELD: electrical engineering. SUBSTANCE: DC arc furnace 8 causes in operation unwanted variations of reactive power corrected by means of condenser 31. AC set-point element 28 of condenser 31 is controlled depending on firing angle stabilizing signal (α) controlled by functional sensor 26 responding to desired reactive power signal (Q), actual reactive power signal (Q), and signal (Q) of filter reactive power corresponding to reactive power of filter circuits 4, , 4'. Desired reactive power signal (Q) depends on total current (i) which, apart from actual current (i) of arc furnace 8, incorporates current through filter circuits 4, 4' and current through auxiliary devices that may be used. EFFECT: improved reactive-power correction. 1 dwg |
