1 Scope
This part of IEC 62888 specifies the specific requirements for EMS to be used for benchmarking, daily energy
consumption monitoring, technical research and development.
This document provides the requirements for monitoring consumed energy on board in
daily services in an easy way and the measured data are applicable for general purposes
in industry such as energy management, energy saving, etc. However, this document
is not applicable for billing purposes.
The practical purposes in industrial fields are, e.g.:
-
a) monitoring daily energy consumption of vehicles;
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b) obtaining data on influential factors, such as operational commands and surrounding conditions, in order to analyse relations between operations and energy;
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c) energy management of power flow between vehicles and fixed installations;
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d) implementing investigation tests of research and development for vehicle systems;
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e) energy cost forecasting for analysing overall efficiency and consumption.
The requirements specified in this document supplement and/or amend the requirements
specified in IEC 62888‑1 to IEC 62888‑5.
The energy measurement system (EMS) is categorized in 3 Levels as described in IEC 62888‑1:2018, Table 1. This document applies to Level 2 and Level 3.
In this document unless levels are specially mentioned, both Level 2 and Level 3 apply.
If a requirement applies only to one level between Level 2 and Level 3, this condition
is clearly specified.
In the following clauses and subclauses square brackets, e.g. [IEC 62888‑3:2018, 4.6.1] in the title indicate relevant clauses and subclauses of other parts.
When lower subclauses of other parts are not listed, provisions of higher subclauses
apply to the lower subclauses.
Table 1
—
Levels of performance [IEC 62888‑1:2018, Table 1]
|
Levels
|
Description
|
Notes
|
|---|---|---|
| Level 1 | Level for measuring energy consumption on board for applications like energy management, energy saving, billing and others. | This is the only level applicable for billing |
| Level 2 | Level for measuring energy consumption on board for applications like energy management, energy saving, benchmarking by suppliers or train operators and others. This level is not applicable for billing. | Level 2 is applied when accuracy requirements need to be raised to ones equivalent to Level 1 by agreement by the Parties for international comparison or benchmarking purposes. |
| Level 3 | Level for daily energy measurement, for instance: technical research and development. This level is not applicable for billing. |
Power and energy are calculated based on voltage and current data acquired from existing
sensors installed in converter systems, etc.
|