Markus Pettersson, ABB AB Power Transformers, · PDF fileMarMarkus Pettersson, ABB AB Power Transformers, October 24 2016, Bangkok rsson, ABB AB Power Transformers, October 24 2016,
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§ The Gotland HVDC transmission link, first commercial project
§ 20 MW 100 kV
Major achievements § 2016: World’s first commissioned 1,200kV UHVAC transformer
§ 2015: Worlds first UHVDC transformer connected to UHVAC passed the test
§ 2015: World’s largest HVDC transformer, Celilo
§ 2014: UHVDC/UHVAC prototype passed the test
§ 2012: 1100 kV UHVDC prototype passed the test
§ 2010: 800 kV UHVDC into commercial operation in China
§ 2008: 800 kV UHVDC unit passed the test
§ 2007: HVDC unit short circuit tested
§ 2000: HVDC light transmission
§ 1982: 600 kV HVDC for Itaipu, Brazil
§ 1954: HVDC line Gotland to mainland Sweden
§ The Changji - Guquan, world’s first 1100 kV UHVDC transmission link
§ 12 000 MW 1,100 kV
ABB HVDC converter transformers An integral and key part of HVDC systems
The role of the converter transformer
§ To separate DC and AC network
§ To adopt voltage to converter valve
§ Tapping range for part of the DC voltage and reactive power control
§ Provide inherent reactance necessary for HVDC current commutation/limitation
§ Transmission line or cable § Transformers
& Thyristor valves
§ Smoothing reactor
§ DC Filter
§ Control System § AC filters § Shunt
capacitors
§ AC bus
Typical features of HVDC transformer
§ Large transformer units
§ Exposed to AC and DC Voltages – strong insulation requirements
§ Subjected to Voltage/Current Harmonics
§ Reactive loading and close interaction with HVDC system
From 800 kV to 1,100 kV UHVDC Why a new rated UHVDC?
§ Meeting increasing energy demands
§ Lowering environmental impact
§ Renewable energy sources are often located far from load centers
§ UHVDC 1,100 kV increases capacity up to 25%, a prodigious upgrade from 800 kV UHVDC
§ Even lower transmission losses over long distances
World’s first 800 kV UHVDC transformers § Xiangjiaba-Shanghai 800kV UHVDC 6400 MW successfully in operation since 2010
§ First technology step since Itaupi including development of completely new transformer technology
§ Lingzhou-Shaoxing (LingShao) 800kV UHVDC 8000 MW. World’s first 800 kV HVDC transformer connected to 750 kV AC. UHVDC connect to UHVAC for first time, in operation 2016
ABB HVDC converter transformers 800 kV UHVDC – Groundbreaking development
World’s first 800 kV 10GW UHVDC transformers
§ Ximeng - Taizhou, 507 MVA, 800 kVdc, 500 kVac
§ 10 000 MW (10 GW) power transmission
§ World’s first 800 kV 10 GW UHVDC transformer
§ Same transport profile as earlier project with less power transmission
§ Enables up to 25% higher power transmissions over long distance, compared with the 800kV UHVDC links in current operation
World’s first 1,100kV transformer § Successfully designed, developed and tested world’s first 1100 kV UHVDC transformer prototype with accompanying bushing, in June 2012
§ Highest power level ever 12000 MW (12 GW) electricity over 3000 kilometers
§ 50% increase in transmission capacity, compared with the 800 kV UHVDC links currently in operation
ABB HVDC converter transformers 1,100 kV UHVDC – Groundbreaking development
World’s first 1,200 kV UHVAC transformers § World’s most powerful UHVAC transformers, alternating current electrical power rated for 1,200kV
§ Successfully developed, manufactured and energized 1,200 kV UHVAC transformers
ABB HVDC converter transformers 1,200 kV UHVAC – Groundbreaking development
World’s first 800kV 10000 MW bushing § World’s most powerful transformer bushing, capable of handling 10,000 MW (10 GW) of direct current electrical power rated for 800 kV
§ Successfully designed, developed and tested world’s first 800kV 10 GW UHVDC transformer wall bushing
§ Enables up to 25% higher power transmissions over long distance, compared with the 800kV UHVDC links in current operation
ABB HVDC transformer bushings Example of ABB UHVDC bushings
Rated power (MW) Rated voltage (kV)
ABB HVDC converter transformers HVDC power and voltage development over time
Transport restriction for remote sites in HVDC projects ABB has proven ability to design compact transformers
Transportation console
约
Transport profile for on railroad for the transfomers in China
§ Maximum transportation mass of transformer 350 ton
§ Itaipu, Brazil 600kV DC (Bushings GOE HVDC). At the Itaipu project the GOE HVDC bushing was first used
ABB HVDC transformer bushings Examples of ABB HVDC bushings
§ 3 Gorges, China 500kV DC (Bushings GOF and GGF). The name was on later projects shorten to GOF
§ Sylmar, USA 500kV DC (Bushings GGF). For 1999 a new design on the air side was introduced to replace free oil in the valve hall with SF6. The name of the bushing was changed to GGF