| 摘要 |
The invention relates to a method and to a device for balanced (symmetrical) control of a controlled series compensation installation (2) in electrical mains power supplies (6). According to the invention, the impedance controlled variables, which are determined from current regulation, for the series compensators (14) of the installation (2), are limited, an upper limit value (Zoo) and a lower limit value (Zou) being determined by means of addition or subtraction respectively from an impedance reference controlled variable (Zo) and from a positive or negative deviation ( DELTA Z+, DELTA Z-), the impedance reference controlled variable (Zo) being selected from the impedance controlled variables (Zy1, Zy2, Zy3). Small imbalances can thus be regulated out and unnecessary regulation excursions in the event of mains power supply defects, on one side, of short duration are avoided. … <IMAGE> … |
