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7/28/2019 Electric Drive VehiclElectric Drive Vehicles Can Be Thought of as Mobile
1/5
Electric drive vehiclElectric drive vehicles can be thought of as mobile, self-contained, and-inthe aggregate-highly reliable power resources. "Electric-drive vehicles" (EDVs) include three
types: battery electric vehicles, the increasingly popular hybrids, and fuel-cell vehicles running
on gasoline, natural gas, or hydrogen. All these vehicles have within them power electronics
which generate clean, 60 Hz AC power, at power levels from 10kW (for the Honda Insight) to
100kW (for GM's EV1). When vehicle power is fed into the electric grid, we refer to it as"Vehicle-to-Grid" power, or V2G.
With the popularization of electric vehicles and the construction of charging stations, the
understanding of people to the electric vehicle and the changing station is not only confined tothe transportation and the "gas station". It is desired to exploit more extensive application. The
concept of V2G was firstly brought out by Willet Kempton of the Delaware University. The
initial goal of V2G was to provide peak power, that is, the electric vehicle owners charging the
vehicles in low load with lower price and discharging the vehicles in peak load with higher price.Then, the vehicle owners can get the profits from the V2G project. The functions of the vehicle
in power grid were expanded, and the conclusion was get that benefit of providing peak power is
significantly less than providing auxiliary services to the power grid . The V2G research also wascarried out in some other countries such as Denmark, Britain and Germany, etc .
es can be thought of as mobile, self-contained, and-in the aggregate-highly
Introduction of Vehicle-to-Grid V2G
The first V2G requirement is the power connection. Battery vehicles must already be connected
to the grid inorder to recharge their batteries; to add V2G capability requires little or no
modification to the charging station and no modification to the cables or connectors, but on
board power electronics must be designed for this purpose had "zero incremental cost."
The second requirement for V2G is control, for the utility or system operator to request vehiclepower exactly when needed. This is essential because vehicle power has value greater than the
cost to produce it only if the buyer (the system operator) can determine the precise timing of
dispatch. The automobile industry is moving towards making real-time communications a
standard part of vehicles. This field, called "telematics" has already begun with luxury vehicles;over a period of time it will be available for most new car models. Whether using built-in vehicle
telematics, or in the interim using add-on communications, the vehicle could receive a radiosignal from the grid operator indicating when power is needed.
The third element of precision, certified, tamper-resistant metering, measures exactly how much
power or ancillary services a vehicle did provide, and at which times. The telematics could again
be used to transmit meter readings back to the buyer for credit to the vehicle owner's account
Thinking about the metering of V2G expands the usual concept of a "utility meter." Electronicmetering and telemetric appear to have efficiency advantages in eliminating the meter reader,
transfer of billing data to the central computer, and the monthly meter-read cycle. More
unnerving, electronic metering and telemetric also eliminates the service address! An onboardmeter would transmit its own serial number or account number with its readings, via telemetric,
and presumably this would be billed in conjunction with a traditional metered account with a
7/28/2019 Electric Drive VehiclElectric Drive Vehicles Can Be Thought of as Mobile
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service address. A large-scale V2G system would automate accounting and reconciliation of
potentially millions of small transactions, similar to the recording and billing of calls from
millions of cellular phone customers.Thus the mobile metered KWhs or ancillary services woldbe added or subtracted to the amount registered on the fixed meter to reconcile both billing
amounts.
The first V2G requirement is the power connection. Battery vehicles must already be
connected to the grid inorder to recharge their batteries; to add V2G capability
requires little or no modification to the charging station and no modification to the
cables or connectors, but on board power electronics must be designed for this
purpose had "zero incremental cost."
The second requirement for V2G is control, for the utility or system operator to
request vehicle power exactly when needed. This is essential because vehicle powerhas value greater than the cost to produce it only if the buyer (the system operator) can
determine the precise timing of dispatch. The automobile industry is moving towards
making real-time communications a standard part of vehicles. This field, called
"telematics" has already begun with luxury vehicles; over a period of time it will be
available for most new car models. Whether using built-in vehicle telematics, or in the
interim using add-on communications, the vehicle could receive a radio signal from
the grid operator indicating when power is needed.
The third element of precision, certified, tamper-resistant metering, measures exactly
how much power or ancillary services a vehicle did provide, and at which times. Thetelematics could again be used to transmit meter readings back to the buyer for credit
to the vehicle owner's account
Thinking about the metering of V2G expands the usual concept of a "utility meter."
Electronic metering and telemetric appear to have efficiency advantages in
eliminating the meter reader, transfer of billing data to the central computer, and the
monthly meter-read cycle. More unnerving, electronic metering and telemetric also
eliminates the service address! An onboard meter would transmit its own serial
number or account number with its readings, via telemetric, and presumably this
would be billed in conjunction with a traditional metered account with a serviceaddress. A large-scale V2G system would automate accounting and reconciliation of
potentially millions of small transactions, similar to the recording and billing of calls
from millions of cellular phone customers.Thus the mobile metered KWhs or ancillary
services wold be added or subtracted to the amount registered on the fixed meter to
reconcile both billing amount
7/28/2019 Electric Drive VehiclElectric Drive Vehicles Can Be Thought of as Mobile
3/5
reliable power resources. "Electric-drive vehicles" (EDVs) include three types:
battery electric vehicles, the increasingly popular hybrids, and fuel-cell vehicles
running on gasoline, natural gas, or hydrogen. All these vehicles have within them
power electronics which generate clean, 60 Hz AC power, at power levels from 10kW
(for the Honda Insight) to 100kW (for GM's EV1). When vehicle power is fed into the
electric grid, we refer to it as "Vehicle-to-Grid" power, or V2G.
With the popularization of electric vehicles and the construction of charging stations,
the understanding of people to the electric vehicle and the changing station is not only
confined to the transportation and the "gas station". It is desired to exploit more
extensive application. The concept of V2G was firstly brought out by Willet Kempton
of the Delaware University. The initial goal of V2G was to provide peak power, that
is, the electric vehicle owners charging the vehicles in low load with lower price and
discharging the vehicles in peak load with higher price. Then, the vehicle owners can
get the profits from the V2G project. The functions of the vehicle in power grid were
expanded, and the conclusion was get that benefit of providing peak power is
significantly less than providing auxiliary services to the power grid . The V2G
research also was carried out in some other countries such as Denmark, Britain and
Germany, etc .
Introduction of Vehicle-to-Grid V2G
The first V2G requirement is the power connection. Battery vehicles must already be
connected to the grid inorder to recharge their batteries; to add V2G capability
requires little or no modification to the charging station and no modification to the
cables or connectors, but on board power electronics must be designed for this
purpose had "zero incremental cost."
The second requirement for V2G is control, for the utility or system operator to
request vehicle power exactly when needed. This is essential because vehicle power
has value greater than the cost to produce it only if the buyer (the system operator) can
determine the precise timing of dispatch. The automobile industry is moving towards
making real-time communications a standard part of vehicles. This field, called
"telematics" has already begun with luxury vehicles; over a period of time it will be
available for most new car models. Whether using built-in vehicle telematics, or in the
interim using add-on communications, the vehicle could receive a radio signal from
the grid operator indicating when power is needed.
The third element of precision, certified, tamper-resistant metering, measures exactly
how much power or ancillary services a vehicle did provide, and at which times. The
telematics could again be used to transmit meter readings back to the buyer for credit
to the vehicle owner's account
7/28/2019 Electric Drive VehiclElectric Drive Vehicles Can Be Thought of as Mobile
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Thinking about the metering of V2G expands the usual concept of a "utility meter."
Electronic metering and telemetric appear to have efficiency advantages in
eliminating the meter reader, transfer of billing data to the central computer, and the
monthly meter-read cycle. More unnerving, electronic metering and telemetric also
eliminates the service address! An onboard meter would transmit its own serial
number or account number with its readings, via telemetric, and presumably thiswould be billed in conjunction with a traditional metered account with a service
address. A large-scale V2G system would automate accounting and reconciliation of
potentially millions of small transactions, similar to the recording and billing of calls
from millions of cellular phone customers.Thus the mobile metered KWhs or ancillary
services wold be added or subtracted to the amount registered on the fixed meter to
reconcile both billing amounts.
Concept Of V2G :
Figure schematically illustrates connections between vehicles and the electric power
grid. Electricity flows one-way from generators through the grid to electricity users.
Electricity flows back to the grid from EDVs, or with battery EDVs, the flow is two
ways (shown in Fig. as lines with two arrow ). The control signal from the gridoperator (labelled ISO, for Independent System Operator) could be a broadcast radio
signal, or through a cell phone network, direct Internet connection, or power line
carrier. In any case, the grid operator sends requests for power to a large number of
vehicles.
7/28/2019 Electric Drive VehiclElectric Drive Vehicles Can Be Thought of as Mobile
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The signal may go directly to each individual vehicle, schematically in the upper right
of Fig. , or to the office of a fleet operator, which in turn controls vehicles in a single
parking lot, schematically shown in the lower right of Fig. , or through a third-party
aggregator of dispersed individual vehicles' power (not shown). (The grid operator
also dispatches power from traditional central-station generators using a voice
telephone call or a T1 line