Patent ID: 8314596

Claim:
A poly-phase reactive power compensator for providing susceptance to an electric power network, said poly-phase reactive power compensator comprising for each delta phase a reactive power means for providing varying susceptance, characterized by means for transferring susceptance between said reactive power means and thereby between said phases, wherein said means for transferring susceptance comprises a thyristor valve arrangement, in turn comprising a first thyristor switch connected at one end to a first phase and at the other end between a thyristor switch and reactor, of a third phase, a second thyristor switch connected at one end to a second phase and at the other end between the thyristor switch and reactor of said first phase, and a third thyristor switch connected at one end to said third phase and at the other end between the thyristor switch and reactor of said second phase and, wherein said reactive power means comprises thyristor-switched capacitors, each thyristor-switched capacitor in turn comprising a capacitor bank and inductor in series connection with a thyristor switch.