Staff from Australian energy distributor SP AusNet are road trialling plug-in hybrid-electric vehicles (PHEVs) in and out of office hours as part of a three-month scientific trial.
Engineers from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) have modified the PHEVs to carry a 30Ah NiMH battery - which is capable of holding a 6kW charge - and a battery charger, to allow the cars to plug into and charge with electricity from the grid or from on-site renewable energy sources.
CSIRO Energy Transformed Flagship scientist Phillip Paevere said the road trial is collecting extensive information on how an existing PHEV can be used as a large mobile battery that can be integrated and used in the home.
‘The PHEVs have been fitted with instruments that will monitor the travel patterns of different users and the residual battery power left in the car at the end of the day, which could be available for other uses,’ Paevere said.
‘When not needed, the parked car in the driveway could potentially become a large battery store and energy source for the house, running appliances or storing off-peak or surplus electricity generated from on-site renewable generators, such as solar panels.’
Sean Sampson, a spokesman for SP AusNet, said the trial will also allow thorough analysis of what the electricity demands are likely to be when PHEVs are connected to the network for charging.
‘The introduction of electric vehicles into the mainstream market could have a significant impact on the electricity network,’ he said. ‘They may also dramatically affect the output at residential and retail outlets and the forecasted growth of peak and base demands.’
The transport sector accounts for 14 per cent of Australia’s total greenhouse-gas emissions.
PHEVs have the potential to reduce emissions and may also provide a way to manage peak demand on the electricity grid.
By controlling when PHEVs are recharging from the electricity network, the burden of demand can be shifted.
The car battery can also be drawn upon to provide power during peak periods of demand, prevent blackouts when there is a network supply interruption and assist in maintaining the overall stability of the network.
The road trial is the first phase in understanding the potential for using PHEVs in Australian homes.
The PHEV technology will also be used in the home-energy system of CSIRO’s Zero Emission House (AusZEH) project.
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