| Abstract |
Due to the strict requirements of the power supply companies regarding the permissible harmonic and voltage disturbances, the use of converter-fed drives in rolling mills demands the installation of static compensators to an increasing extent. A control concept is presented, which in combination with the components used, satisfies stringent demands on high dynamical compensation of reactive load as well as guaranteeing high accuracy of phase balancing. All control functions such as evaluation of measured values, computation of power (active and reactive components), filter- and control algorithms are implemented on a powerful Programmable High Speed Control System (PHSC). The theoretically derived aspects concerning the required control performance are verified by experimental result gained from a laboratory setup as well as from the operation of the compensator in a rolling steel milI. |
