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Concept of a combined short circuit limiter and series compensator [power lines]

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1 Author(s)
Karady, G.G. ; Arizona State Univ., Tempe, AZ, USA

A novel concept for a combined short circuit limiter and dynamic series compensator is presented. The device consists of a fixed capacitor, thyristor switched capacitors, and a thyristor switch inductance. The circuit is designed to regulate the impedance in steps. The series compensation is controlled by the capacitors switching on and off, while the current limitation is achieved by the insertion of a resonant LC circuit in the transmission line. The thyristor switches are operated at zero current crossing, which eliminates the harmonics generation. The system operation has been analyzed and realistic components have been selected. The results have demonstrated that the device can regulate the short circuit current. It can be built with commercially available components; the significant operation improvement is expected to justify the cost of the new device

Published in:

Power Delivery, IEEE Transactions on  (Volume:6 ,  Issue: 3 )