New High-Pass Coupling Network for Power Line Carrier Operation: Design Considerations

The parameters involved in providing carrier frequency coupling to a high-voltage power transmission line are examined. From these, conventional network theory is applied to obtain a high-pass coupling network which provides wideband 32 to 300 kHz, low-loss (less than 1/2 dB) operation over 1-phase wire-to-ground of a 3-phase line. Test data taken from appropriate models show the operating characteristics of the resulting design. Ten figures and three tables are provided to aid in designing specific systems. The physical aspects of this new high-pass coupling network and the results of field trial tests now in progress, which substantiate the design, are described in separate papers.