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Hybrid Electric Vehicles meet the Electricity Grid: Plug-in Hybrids (PHEVs) & Vehicle to Grid (V2G) Dr Geoff Walker Sustainable Energy Research Lab School.

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Presentation on theme: "Hybrid Electric Vehicles meet the Electricity Grid: Plug-in Hybrids (PHEVs) & Vehicle to Grid (V2G) Dr Geoff Walker Sustainable Energy Research Lab School."— Presentation transcript:

1 Hybrid Electric Vehicles meet the Electricity Grid: Plug-in Hybrids (PHEVs) & Vehicle to Grid (V2G) Dr Geoff Walker Sustainable Energy Research Lab School of Information Technology and Electrical Engineering University of Queensland

2 Talk Outline 1.A Crisis in Passenger Vehicle Transport 2.Hybrid Electric Vehicles (HEVs) 3.Plug-in Hybrids (PHEVs) – why bother? 4.Vehicle to Grid (V2G) – the next step 5.Vehicle Sales and HEV sales growth 6.The Electricity Grid in Australia 7.The National Electricity Market (NEM)

3 Drivers for change in the Australian Automobile Industry Reduce oil consumption – a finite resource Reduce oil imports to achieve increased energy security and improved balance of trade Reduce greenhouse gas emissions Reduce urban pollutant emissions Many more sensible reasons could be given: these four are perhaps the most topical and pressing.

4 The End of Cheap Oil by Colin J. Campbell and Jean H. Laherrère Scientific American March 1998 Global production of conventional oil will begin to decline sooner than most people think, probably within 10 years

5 World oil production in decline by 2010

6 Has Demand exceeded Supply?

7 Oil prices are now more than 45 per cent higher than a year ago, having gained 36 per cent in the past three months. But even the psychological $US70 a barrel mark would still be $US20 below the all-time inflation-adjusted peak price for crude oil set in 1980. Analysts said yesterday that the major reason for yesterday’s price spike was not concern about terrorist attacks in Saudi Arabia or worry about Iran’s nuclear program. Rather, traders were punting on a belief that US oil refiners would strain to meet domestic petrol demand in coming weeks while also storing enough heating fuel for the northern hemisphere winter. Added to those supply problems was a report this week from the International Energy Agency revealing that non-OPEC nations were failing to deliver as much oil as expected this year, leaving a stretched OPEC to fill the void.

8 We’ve now passed US$70 barrel $100 per barrel in 12 months time ??? (if we project this trend despite the warning not to!)

9 Inflation corrected oil price Current high still not as bad as 1980

10 Aside – A DVD worth viewing THE END OF SUBURBIA: Oil Depletion and the Collapse of The American Dream Also worth a good read:

11 Moving from Oil to sustainable energy generation In the near future, Oil production will fall, but energy consumption will continue to rise. We need to find fossil alternatives, preferably green and sustainable Ramping sustainable alternatives up will take time, money and land In the interim, we will swap to coal and gas, and (perhaps) curtail our consumption.

12 Reduction in Oil Imports and Increased Energy Security Percentage of Australia's oil and petroleum products consumption sourced from imports (Australian Energy News, 2002).

13 Greenhouse gases (GHGs) in Australia from Transport In 2000, 15% of Australia’s GHG emissions are from transport sector [AGO, 2003] Road transport represents 90% of this total Cars contributed 45 Mt of CO 2 equivalent emissions, or 8% of net national emissions in 2003.

14 Pollutant Emissions in Australia from Transport Fossil fuel combustion, particularly by motor vehicles, has been identified as the largest single contributor to urban air pollution. Percentage Contribution of Motor Vehicles to Air Emissions in Major Australian Cities (Motor Vehicle Environment Committee, 1998) Carbon Monoxide (CO) Hydrocarbons (HC) Oxides of Nitrogen (NOx) Particulates (PM) 70-95%40-50%70-80%10-50%

15 Solutions to this Crisis? Walk the kids to school and work from home Catch public transport, or Carpool Dust off the bicycle and ride Drive smaller, lighter cars Trust car companies to give us more of the same, only more efficient …

16 ICE efficiency Internal combustion engines, both petrol and diesel, can achieve only ave. efficiency when small and not optimised GEFG25-1 25kVA gas genset Ford 4 cyl, 4 stroke, 2.5 litre 492 kg ICE * gen efficiency = 22% * 89% = 20%

17 Toyota Prius vs Corolla 06 Prius, $37,000 RRP 4.4 L/100km 10.9 sec 0-100kph 1295 kg NHW20R Liftback 5dr CVT 1sp 1.5i 06 Corolla, $21,700 RRP 8.1 L/100km ??? sec 0-100kph 1148 kg ZZE122R 5Y Ascent Hatchback 5dr Auto 4sp 1.8i

18 Prius Drivetrain 1.5 litre petrol ICE, 56kW –Atkinson cycle (vs. Otto) –34% efficient at 13.5 hp Two 3ph permanent magnet motors: –MG1, 18kW –MG2, 30kW A planetary gear which allows a continuously variable drive ratio Sources:

19 Prius Inverter and Battery Power electronic 3ph inverters matched to motors –50kW total at 500V –liquid cooled under bonnet NimH battery pack: –nominal 274V, 6.5 Ah (1.8 kWh) –20kW rating at 50% SOC –Operated between 40-80% SOC for lifetime (0.7 kWh) –Complete pack 54 kg including all management, packaging –Toyota data demonstrates 290,000km without degredation Sources:

20 Example Electric Vehicle – GM EV1

21 Hybrids vs. EVs Electric Vehicles (EVs) Large battery pack: –Expensive –Limited range –Uncertain life Pure electric drivetrain +Excellent energy efficiency +Independence from oil Hybrids (HEVs) Minimised battery pack +Cheaper +Long range +Manageable lifetime ICE based drivetrain –Incremental efficiency gain –100% dependant on oil Can’t we have the best of both worlds?

22 Plug-in Hybrids (PHEVs) Typical vehicle usage is for Urban commuting –80% of trips are less than 10km and over 90% are less than 20km [1992 SEQ Household Travel Survey] So augment the Hybrid battery pack to allow electric only operation for limited range sufficient for daily commute (say 20km – PHEV20) Charge the battery from the electricity grid overnight – so this energy does not come from oil

23 Plug-in Prius EnergyCS Original Prius NimH pack replaced with 127kg Lithium-ion Batt pack 35-40Ah, 9kWhr 80-100km range at half the fuel consumption (but add some grid electricity) Uses off-the-shelf Valence Technology Saphion U Li-ion batteries. Sources:

24 Vehicle to Grid (V2G) PHEVs will mean we choose to plug in our hybrid or electric vehicle to the grid Rather than just another load, can these vehicles be harnessed as a resource? We need to make the grid connection to the battery through a powerful, bidirectional inverter, not just a battery charger. Why not use the traction motor inverter!

25 AC propulsion AC150 grid connection Using the 3 phase traction inverter gives: –Large power rating (20kW) –Instantly controllable real and reactive power flow –3ph or 1ph –Built in, only Incremental cost

26 Components of the V2G system

27 Services V2G can offer Frequency regulation: Contingency –6 sec –60 sec –5 min Voltage Regulation Recloser ride-thru ACP_V2G_EVS18.pdf from GUIDE TO ANCILLARY SERVICES IN THE NEM pdf

28 Services V2G can offer Note that the V2G services are usually about the provision of instantaneous real and reactive power as a service NOT about the supply of energy Battery pack capacity usually limits the peak shaving / load levelling capability Some hybrids can start Internal combustion engine and generate – but of limited value

29 Infrastructure Issues, especially in CBD? 32A 415V 3ph service per park Allows 23kW peak One floor = 160 cars = 3.7 MW! Dedicated 1MVA padmount txfmrs? Dedicated cabling?

30 Toyota is committed to Hybrids Prius is a speciality hybrid – available as nothing but a hybrid. However … Sixth generation Camry MY2007 will have three main powertrain options: 2.4 L Four 3.5 L V6 2.4 L four hybrid with 34kW electric motor Celica & MR2 being withdrawn mid 2006, a hybrid replacement will appear 2008. Hybrid Lexus SUV and luxury vehicles will be launched in 2006 and 2007 Sources: Automotive Engineering International, Feb 2006, p20,, Personal communication with Mike Breen, PR, Toyota Aust.

31 Toyota is committed to Hybrids Toyota Sees All-Hybrid Future 13 September 2005 BloombergBloomberg. At the Frankfurt IAA, Toyota Executive Vice President Kazuo Okamoto said all of the company’s vehicles will eventually be based on hybrid powertrains. Toyota also indicated that it aims to increase hybrid production by 60% in 2006 and will cut costs and prices to make them more affordable. In the future, the cars you see from Toyota will be 100 percent hybrid. We believe that in 10 years the world will be filled with hybrids. Okamoto declined to provide a timeline. Toyota has stated that it plans to sell 1 million hybrids a year by 2010. Earlier, President Katsuaki Watanabe said he aims to halve the premium in price of hybrids over conventional vehicles as soon as possible. Source:

32 Hybrid sales growth in Aust Fleet Hybrid numbers are currently tiny: –1094 Priuses is only approx 0.2% of car sales Hybrid numbers are growing rapidly: –Prius sales 2003, 2004, 2005 292, 1094, 1423+500 orders –Prius 2006 allocation to Aust is approx 2000 and demand will again out strip supply Soon mainstream vehicles such as the Camry will have Hybrids options too.

33 Registered passenger vehicles in Australia … Over 10.3 million in 2003, up from around 8.3 million in 1993. (GRW – 24% in 10 years) 522 cars for every 1,000 people in 2003, was 469 cars per 1,000 people in 1993.[1] (GRW – 11% faster than pop in 10 years) A shift towards four wheel drive cars, which made up 17% of new vehicle sales in 2002, up from 8% in 1992.

34 Aust Vehicle Fleet Turnover Total vehicle sales in 2005 – 988,269 –Up by 3.5% on 2004 – 955,224 Passenger vehicle sales ‘05 – 608,804 –Consists of small, light, medium, large, sports, prestige, luxury, people mover Sports Utility Vehicles ’05 – 180,292 Light trucks ’05 – 167,878 Heavy trucks ’05 – 31,295 Source: VFACTS Industry Summary - December 2005, 05/01/06

35 Vehicle fleet generation potential Total installed capacity of Aust Grid approx 50 GW 10.3 Million vehicles, at a modest 20kW = 200 GW power generation capability 600000 new sales = 12 GW generation But how to harness? Source: ESAA 2001

36 Vehicle make up of Aust Fleet Top Vehicle makes (2005): –Toyota202,81720.5% –Holden174,46417.7% –Ford129,14013.1% Some individual vehicles (2004): –Ford Falcon 65,384 –Holden Commodore 79,170 –Toyota Camry 40,356 –Toyota Prius 1,0940.18% of cars sold Source: VFACTS Industry Summary - December 2005, 05/01/06 Source: VFACTs December 2004, extract published at

37 Growth of Hybrids will be Exponential: YearTotal Vehicles Percentage of Toyota sales Explanation 20033000.2%Priuses only 200410000.5%Priuses only 200630001.5%Priuses only 2008100005.0%Priuses, some Camrys 20103000015.0%all 4cyl Camrys 201212000060.0%All Toyota "cars" 2014200000100.0%All Toyotas One possible scenario:

38 The previous slide is somewhat conservative: All numbers based on 2004 figures – so no inclusion of year to year growth All numbers are Toyota sales only – so no inclusion of hybrids from other manufacturers. Their trends will be similar, but lagging by two – three years. Vehicle energy storage and power capability are based on today’s numbers

39 A possible growth Scenario Year Toyota Hybrids kWh / car kW / car Total MWh Total MW 20033001100.33 200410001101.313 20063000110659 2008100001.51029209 201030000210114679 20121200002104742479 201420000021012746479 2016200000210207410479

40 After 10 years (2016): Approx 10.5 GW of instantaneous real or reactive power generation capability Approx 2000 MWh energy storage –NB: large power, but small energy reserve Distributed across population centres at point of consumption This using a fairly conservative model (Toyota hybrids are only hybrids)

41 Probably don’t need this slide, but included for completeness Each passenger vehicle travelled an average 14,200 kms in the year to 31 October 2002, up from 13,400 kms in 1998.[4] ( GRW – 6% in 4 years) Average passenger vehicle fuel consumption has remained around 11 to 12 litres per 100kms over the 1998 to 2002 period more cars x more km x same fuel consumption = much more fuel Measures of Australia's Progress – The measures – Transport, at [1] Australian Bureau of Statistics 2003, Motor Vehicle Census, cat. no. 9309.0, ABS, Canberra [4] Australian Bureau of Statistics 1991-2000, Survey of Motor Vehicle Use, cat. no. 9208.0, ABS, Canberra

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