PROCESS AND DEVICE FOR REDUCING ASYMMETRIC VOLTAGES IN A THREE-PHASE SYSTEM BY MEANS OF A STATIC COMPENSATOR

摘要

PCT No. PCT/DE93/00478 Sec. 371 Date Dec. 4, 1995 Sec. 102(e) Date Dec. 4, 1995 PCT Filed Jun. 3, 1993 PCT Pub. No. WO94/29939 PCT Pub. Date Dec. 22, 1994The invention relates to a method and a device for reducing imbalances ( DELTA V12, DELTA V23, DELTA V31) in a three-phase network (42) by means of a static compensator. According to the invention, a correction signal ( DELTA B12, DELTA B23, DELTA B31) is in each case superimposed on a mean susceptance value (BSVC), which is produced, of the static compensator, which correction signals ( DELTA B12, DELTA B23, DELTA B31) are in each case proportional to an imbalance ( DELTA V12, DELTA V23, DELTA V31), which imbalances are determined from measured line to earth voltages (V01, V02, V03) by comparisons, in pairs, of the determined line to line voltages (V12, V23, V31). Imbalances ( DELTA V12, DELTA V23, DELTA V31) in the three-phase network (42) can thus be reduced in a simple manner.