MaxTrainCurrent (de: Oberstrombegrenzung)

Description

The electrification of a railway line is currently not completely modelled. In particular, there is missing an attribute or an element to describe the maximum allowed current and power of a train. For closing this gap, it is suggested to extend the existing element .

Background

According to EN 50388 the maximum allowed current and power of a train on some railway line sections is limited by the electrification. This may have an influence on train acceleration, running times and energy consumptions.

Links

• Forum discussion
• Dr. Thorsten Frenzke, January 2018: [https://www.railml.org/forum/index.php?t=msg&th=549&start=0&]
• Wiki documentation
• IS:electrification: [http://wiki.railml.org/index.php?title=IS:electrification]
• IS:electrificationChange: [http://wiki.railml.org/index.php?title=IS:electrificationChange]

Proposed solution for railML 2.4

The element shall be extended with a new optional child element .

This new child element contains an attribute @maxPantoCurrentStandstill to describe the maximum current per pantograph in Ampere for standing vehicles.

Further, shall contain an optional, repeatable child element . This element has the parameter @maxCurrent to describe the maximum allowed train current in Ampere. further contains an "any attribute extension point" in order to allow for definition of further parameters that influence the maximum train current. One example for such a parameter: the train type.

Example based on proposed solution:

<electrificationChange id="ec01" pos="0">
  <maxTrainCurrent maxCurrent="800" type="standstill" validFor="pantograph"/>
  <maxTrainCurrent maxCurrent="3000" type="driving" validFor="train" extension:trainType="passenger"/>
  <maxTrainCurrent maxCurrent="1200" type="driving" validFor="train" extension:trainType="freight"/>
</electrificationChange>

The child element shall be also added to the element. Resulting example:

<infraAttrGroups>
  <infraAttributes id="ifa01">
    <electrification frequency="16.7" voltage="15000" type="overhead">
      <maxTrainCurrent maxCurrent="800" type="standstill" validFor="pantograph"/>
      <maxTrainCurrent maxCurrent="3000" type="driving" validFor="train" extension:trainType="passenger"/>
      <maxTrainCurrent maxCurrent="1200" type="driving" validFor="train" extension:trainType="freight"/>
    </electrification>
  </infraAttributes>
</infraAttrGroups>

A first version of the solution has been implemented for railML 2.4. Still missing: documentation in Wiki.

Proposed solution for railML 3.x

The maximum train current need to be described for railML 3.1 related use case "Network Statement". It is intended to have a similar implementation of under