L.1351 Energy efficiency measurement methodology for base station sites

Scope

L.1351 describes requirements for Site Energy Efficiency (SEE) parameter measurements, focusing on real-site conformity assessment for L.1350. The concept of general energy efficiency is covered in L.1315.

Summary

Measurement points 

  • ECT: Input of the telecommunication equipment, e.g. for DC powering the interface A (defined in [b-ETSI EN 300 132-2]).
  • EGE: Base station site grid input or, if no other AC load or generators, at the input of the power feeding equipment.
  • EFE: Generator output or, if no generators, at the input of the power feeding equipment.
  • ERE: Renewable energy source output (e.g. photovoltaic array system) or, if no other renewable energy source, at the input of the power feeding equipment.
  • ETS: Is the sum of EGE, EFE & ERE.

 

Measurement conditions

  • Conditions include climatic, load and power grid variations.
  • Measurement recording periods for all necessary data (the same period for all data, e.g. ECT, EFE, etc.) should be 1 day, 1 week, 1 month, or 1 year.
  • The parameters in the period should be recorded at least every 15 min (for the day, week, month, or year).

 

Instrumentation requirements: calibrated AC and DC energy meters, in line with Class 1 requirements by IEC 62052-21, shall be used (see L.1315).

 

Reporting requirements

  • Reports should be in line with ISO/IEC 17025
  • Reports contain site identification, equipment present on the site, and a description of the test set-up, including a list of sensors/instrumentation used, topology, choice of load structures, and test actions.

 

Continuous monitoring of site energy efficiency and the necessary parameters for the calculation is recommended. This can be used for transparency and preventive maintenance based on the anomaly variation of site energy efficiency (e.g., by defining a threshold value as a key performance indicator).

Index