ELECTRIC CARS 2011 -Unmanaged charging of electric cars could be costly
ELECTRIC CARS 2011 -Unmanaged charging of electric cars could be costly
A new joint study by PJM Interconnection andBetter Placehas found that unmanaged charging of one million electric cars could add $750million in annual wholesale energy costs unless smart charging is adopted.
It found that consumers choosing to leverage time of use pricing can see some price relief – less than 10 per cent annually – but the wholesale energy business would still be rocked by ad hoc charging. By contrast, smart charging one million electric cars would cut in half the increase in wholesale energy costs.
As part of the study, an analysis was made of the impact of one million electric cars on the MidAtlantic States’ grid in three scenarios: unmanaged charging; consumer price incentivised charging; and managed charging via a Central Network Operator. The latter charges batteries based on criteria such as energy needed for the next planned trip; time until energy is known or predicted to be needed; current state of charge; time of date; locational marginal prices; and real-time prices.
It found that Central Network Operator managed charging would save $350million annually on cost increases due to the added load of electric vehicles. With the time of use pricing with a fixed priced schedule, there was no significant benefit and compared to the unmanaged charging scenario there was an additional cost of $32million annually.
According to Hugh McDermott, the vice president of utility and smart grid alliances forBetter Place, with smart charging a central network operator could leverage dynamic wholesale energy prices and optimise the entire fleet’s charging at the lowest possible cost and impact to both the grid and the consumer.
A new joint study by PJM Interconnection andBetter Placehas found that unmanaged charging of one million electric cars could add $750million in annual wholesale energy costs unless smart charging is adopted.
It found that consumers choosing to leverage time of use pricing can see some price relief – less than 10 per cent annually – but the wholesale energy business would still be rocked by ad hoc charging. By contrast, smart charging one million electric cars would cut in half the increase in wholesale energy costs.
As part of the study, an analysis was made of the impact of one million electric cars on the MidAtlantic States’ grid in three scenarios: unmanaged charging; consumer price incentivised charging; and managed charging via a Central Network Operator. The latter charges batteries based on criteria such as energy needed for the next planned trip; time until energy is known or predicted to be needed; current state of charge; time of date; locational marginal prices; and real-time prices.
It found that Central Network Operator managed charging would save $350million annually on cost increases due to the added load of electric vehicles. With the time of use pricing with a fixed priced schedule, there was no significant benefit and compared to the unmanaged charging scenario there was an additional cost of $32million annually.
According to Hugh McDermott, the vice president of utility and smart grid alliances forBetter Place, with smart charging a central network operator could leverage dynamic wholesale energy prices and optimise the entire fleet’s charging at the lowest possible cost and impact to both the grid and the consumer.
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