A New High Pass Coupling Network for Power Line Carrier Operation - Field Test Report

Field tests of a new high pass coupling network for power line carrier operation are discussed. The tests pointed out several weaknesses in the coupling system as originally designed and installed. Redesign of coupling units and installation of auxiliary capacitors on the substation bus improved the attenuation characteristics and low-frequency cut-off point of the networks, resulting in satisfactory operation. Results of field test measurements are shown for the original and for the modified systems.