IEEE Electrification - September 2020 - 76

RUs operate trains. Trains can use electric traction. To
be able to invoice based on the real energy consumption,
energy meters are needed onboard trains. As trains move
from country to country, the EMS should include location
data (for example, from a GPS).
EMS units are installed on vehicles. A notified
body checks the conformity assessment and delivers
the report to the vehicle keeper. This report also
states the needed measures to be included in the
vehicle's maintenance plan to keep the EMS accurate
over its lifetime.

All new EMSs will use the protocol defined in EN
50463-4:2017 to send the energy metering data to
ground. Older EMSs can still use legacy protocols.
Each member state shall offer the service to collect the
data according to the new protocol. This is done with a
DCS. The EMS installed on trains running through different countries send all their data to one DCS.
The first part of settlement system focuses on validating the received data coming from the EMS (for example,
interpolating missing locations), allocating consumption
to country where consumption took place, and distributing data to the correct settlement
system. After this exchange-function, the settlement system will
ReadingBlockType
only have to deal with consumption inside the settlement area
EMSType
where the consumption took place.
CPID
The settlement system also
needs to validate the energy meterTimePeriod
ing data, estimate missing data or
EMS
data of poor quality, and allocate
XMLVersion
the consumption data to the correct parties. This part of settlement
any ##other
is also called energy use settlement
0...∞
as it defines and allocates the energy consumptions. To do this, the
MeasurementInterval
energy use settlement should
receive data of sufficient quality on
ReadingType
the input side.
ReadingID
The EMS uses the European vehicle number (EVN) as a part of its ID.
TimeStamp
The RU should declare the real comTimeStampQuality
position of train runs via the telematics applications for freight and
Channel
passenger services. These messages
0...∞
can include the EVNs of all traction
ReadingBlock
Location
units. With these data, the IM has
useful data to estimate the conReading
AssociatedCEBD
sumption (based on, for example,
0...∞
Speed
mass, distance, gradients of the trajectory, and speed) and can also
IndoorTemperature
make the link between energy
OutdoorTemperature
metering data of some EMS with a
train run and thus with an RU. Other
InternalLoad
methods for validation and alloca0...∞
tion are possible.
any ##other
Energy use settlement allocates
0...∞
consumption to a consumer (the
RU operating the train having the
any ##other
EMS). Energy use settlement may
0...∞
also need to allocate the consumption to grid areas inside the elecSignature
tricity market of the specific
country. Depending on national legislation, the consumer can appoint
Figure 6. The ReadingBlock structure, created with XMLSpy from CEBDBlock.xsd as defined in
EN 50463-4:2017.
the parties in the energy market,

I E E E E l e c t r i f i cati o n M agaz ine / SEPTEMBER 2020

IEEE Electrification - September 2020

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