High phase order transmission demonstration. Final report
- New York State Electric and Gas Corp., Binghamton, NY (United States)
- Power Technologies, Inc. (United States)
High-phase-order (HPO), or six-phase, transmission is an extension of line compaction that further increases the power transfer capability of a limited transmission line right-of-way. On July 1, 1992, the first commercially operated six-phase transmission line was energized as a tie line integrated into the New York State Electric and Gas (NYSEG) existing three-phase power system. Previous Empire State Electric Energy Research Corporation (ESEERCO) Project EP 88-23 reports detail the analytical framework and conceptual studies (Phase 1) and the detailed engineering and design/construction (Phase 2) that preceded the 1992 energization. After the six-phase line was constructed, a testing program verified the theoretical predictions of electrical effects due to six-phase construction. This Final Project Report details the results of the Phase 3 testing program and examines steady-state power frequency parameters, partial switching, corona effects, and field effects. In addition, this report details the results of two unplanned unstaged faults, and low-level staged faults. After one year of operation, results led to the identification of aspects that warranted additional study and evaluation. This report summarizes these additional investigations and evaluations of midspan spacers, off-the-shelf microprocessor-based relays for six-phase line protection, live line maintenance, possible standard six-phase station designs, and an economic evaluation of break-even distances for which six-phase is more economical than conventional double-circuit three-phase applications for line upgrades and new construction.
- Research Organization:
- New York State Electric and Gas Corp., Binghamton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Electric Power Research Inst., Palo Alto, CA (United States); Empire State Electric Energy Research Corp., New York, NY (United States); New York State Energy Research and Development Authority, Albany, NY (United States)
- DOE Contract Number:
- FG05-91CE35045
- OSTI ID:
- 656888
- Report Number(s):
- DOE/CE/35045-T1; BR: AK0600000; TRN: AHC29817%%448
- Resource Relation:
- Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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