BPA´S New Generation of 500 kv Lines

After obtaining approximately seven years of operating experience, BPA initiated a major study in 1974 to review and re-evaluate the existing 500 kV line design parameters and criteria. Based on the results of this study, BPA designed a new generation of 500 kV lines. This report discusses the electrical and structural design parameters and criteria for BPA´s new generation of 500 kV single and double circuit lines. Also discussed are cost savings of 10% for the new single circuit lines and 17% for the new double circuit lines.