METHOD OF AUTOMATIC CONTROL OVER VOLTAGE OF ELECTRIC FILTER Russian patent published in 2000 - IPC

FIELD: systems of automatic control over high-voltage rectifying plants supplying gas cleaning electric filters with rectified high-voltage current. SUBSTANCE: after spark or arc puncture of precipitation space of electric filter it is necessary to restore voltage across electric filter to level somewhat lower than that of puncture to keep average value of voltage across electric filter at maximum possible level. To solve this problem maximum values of voltage U_max.punc before puncture and U_max.rest in first half-period after reconstruction are measured in sequence and compared. If AU_max.punc-U_max.rest>0 then value of initial angle is increased, if AU_max.punc-U_max.rest<0 then value of initial angle is decreased and if AU_max.punc-U_max.rest= 0 value of initial regulation angle is not changed. EFFECT: increased degree of cleaning of gas with use of this electric filter. 2 cl, 1 dwg