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Hvdc stations
- 2. HVDC inter-island. Ballia – Bhiwadi Transmission Lin Topics :
- 3. Location Country New Zealand General direction South-North From Benmore Hydroelectric Power Station, near Otematata, Canterbury To Haywards transmission substation, Lower Hutt the HVDC link starts at the Benmore Hydroelectric Power Station, on the Waitaki River in Canterbury, on the South Island, and then it travels 534 kilometres (332 mi) on an overhead transmission line through inland Canterbury and Marlborough to Fighting Bay in the Marlborough Sounds. From Fighting Bay, the link travels 40 km via submarine cables underneath Cook Strait to Oteranga Bay, near Wellington, before travelling the final 37 km on overhead lines to Haywards transmission substation in Lower Hutt. HVDC inter-island.
- 4. CONSTRUCTION • Manufacturer of substations : ABB group and Seimens • HVDC inter-island 1 :1965 • HVDC inter-island 2 :1992 • HVDC inter-island 3 :2013
- 5. Name HVDC inter-island 1 Type Bipole HVDC powerline with overhead transmission line and submarine power cables underneath the Cook Strait Type of current HVDC Total length 610 km (380 mi) Power rating 600 MW voltage 270 kV remarks Built as 250 kV 600 MW link Paralleled to operate at 270 kV as positive pole with HVDC Inter- Island 2 in 1992. Partially decommissioned in 2007, fully decommissioned in August 2012. Technical information
- 6. Name HVDC inter-island 2 Type Bipole HVDC powerline with overhead transmission line and submarine power cables underneath the Cook Strait Type of current HVDC Total length 610 km (380 mi) Power rating 700MW voltage 350KV Remarks Negative pole, operates in bipole configuration with HVDC Inter- Island 3 (previously HVDC Inter- Island 1) Restricted to 500 MW due to cable
- 7. Name HVDC inter-island 3 Type Bipole HVDC powerline with overhead transmission line and submarine power cables underneath the Cook Strait Type of current HVDC Total length 610 km (380 mi) Power rating 735MW Voltage 350KV Remarks Positive pole, operates in bipole configuration with HVDC Inter- Island 2
- 9. Submarine cables HVDC 350 kV submarine cable cross section. Overall diameter 13 cm/5 in.The three submarine power cables installed in 1991 are each rated to carry 1430 A continuously at 350 kV operating voltage. They are constructed with a compacted multi-strand copper conductor as a central core, with mass-impregnated paper insulation surrounded by a lead sheath. Two layers of galvanised steel wire armour provides strength and mechanical protection. The outer layer of the cable is a serving made from polypropylene rope and the outer diameter is approximately 130 mm. The cables have a 30-minute overload capacity of 1600 A Sample cross-section of HVDC line conductor HVDC 350 kV submarine cable cross section. Overall diameter 13 cm/5 in.
- 10. +500 kV, 2500 MW HVDC Ballia – Bhiwadi Transmission Link. Pole 1 Commissioned on 31-03 10 Main Data: Power rating : 2500 MW No. of Poles : 2 AC Voltage : 400 kV DC Voltage : + 500 kV Length of over head DC line : 780 Km. Converter Transformer Ballia : 8 x 498 MVA Bhiwadi :8 x 498 MVA
- 11. System Salient Features: (i) Bi-Pole + 500 kV, 2500 MW HVDC 780 km Transmission lines from Ballia (Eastern part of India) to Bhiwadi (Northern part of India) of Indian Grid. (ii) (ii) Each pole power carrying capacity is 1250 MW. (iii) (iii) During unfavorable weather condition, operation at 70% to 80% DC voltage is possible. (iv) (iv) Reverse power flow capability is available.
- 12. Switchable Configuration of Spare Converter Transformer Arrangement of Spare Converter Transformer for quick restoration of Pole in case of failure of Converter Transformer. Each Pole is having a dedicated Spare Converter Transformer with switching arrangement. Transformer Configuration being used for the first time.