EPRI programs on AC to DC Line Conversion

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Total Losses – 230 Kv example Total Losses - % 10% 9% 8% 7% 6% 5% 4% 3% 2% 1% 0% Voltage 230 kV Impedance .08 +j.7 ohms/mile Conductor 1,272 kcmil Max I (90 o C) 1,000 amperes Op. Rating 220 MVA 200 Miles AC Bipole Tripole 0 50 100 150 200 250 300 350 400 450 500 550 600 Real Power Transfer - MW
Redundancy Redundancy = Important because: Max. MW with one pole out Total maximum MW • Need for earth return, ground electrodes can be eliminated • Redundancy prevents the converted line from becoming a limiting outage case where a large boost in MW capacity is realized.
Page 1 and 2: Conversion of AC Lines to HVDC <str
Page 3 and 4: EPRI AC to DC conv
Page 5 and 6: Conversion means buying converter c
Page 7 and 8: Conversion of AC Lines to HVDC Bipo
Page 9 and 10: Economic feasibility sensitive to M
Page 11 and 12: Pole 3 alternately relieves some po
Page 13 and 14: Tripole Power Capability At any giv
Page 15 and 16: Tripole Terminal Requirements: •
Page 17 and 18: Economic feasibility sensitive to M
Page 19: Comparison of line losses If dc is
Page 23 and 24: Emergency/Normal Capability P ac =
Page 25 and 26: Conversion of AC Lines to HVDC 1. C
Page 27 and 28: Example Gradient Precedents: Exampl
Page 29 and 30: Conversion of AC Lines to HVDC 2. I
Page 31 and 32: AC Operation D e = Electrical compo
Page 33 and 34: Conversion of AC Lines to HVDC Exam
Page 35 and 36: Conclusions: 1. V dc may be as high
Page 37 and 38: Example costs for transmitting elec
Page 39 and 40: Cost to gain transfer by ac to dc c
Page 41 and 42: Conversion of AC Lines to HVDC Curr

EPRI programs on AC to DC Line Conversion

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