1 Scope
2 Normative references
3 Definitions and symbols
    3.1 Definitions
    3.2 Letter symbols
4 General
    4.1 Introduction
    4.2 Ambient conditions
          4.2.1 Outdoor standard reference temperature
          4.2.2 Coolant standard reference temperature
          4.2.3 Standard reference air pressure
    4.3 Operating parameters
5 Determination of equipment losses
    5.1 Thyristor valve losses
          5.1.1 Thyristor conduction loss per valve
          5.1.2 Thyristor spreading loss per valve
          5.1.3 Other conduction losses per valve
          5.1.4 DC voltage-dependent loss per valve
          5.1.5 Damping loss per valve (resistor-dependent
                  term)
          5.1.6 Damping loss per valve (change of capacitor
                  energy term)
          5.1.7 Turn-off losses per valve
          5.1.8 Reactor loss per valve
          5.1.9 Total valve losses
          5.1.10 Temperature effects
          5.1.11 No-load operation loss per valve
    5.2 Converter transformer losses
          5.2.1 General
          5.2.2 No-load operation losses
          5.2.3 Operating losses
          5.2.4 Auxiliary power losses
    5.3 AC filter losses
          5.3.1 General
          5.3.2 AC filter capacitor losses
          5.3.3 AC filter reactor losses
          5.3.4 AC filter resistor losses
          5.3.5 Total a.c. filter losses
    5.4 Shunt capacitor bank losses
    5.5 Shunt reactor losses
    5.6 DC smoothing reactor losses
    5.7 DC filter losses
          5.7.1 General
          5.7.2 DC filter capacitor losses
          5.7.3 DC filter reactor losses
          5.7.4 DC filter resistor losses
          5.7.5 Total d.c. filter losses
    5.8 Auxiliaries and station service losses
    5.9 Radio interference/PLC filter losses
    5.10 Other equipment losses
Annex A (normative) Calculation of harmonic currents and
voltages
      A.1 Harmonic currents in converter transformers
      A.2 Harmonic currents in a.c. filters
      A.3 Harmonic voltages on the d.c. side
      A.4 DC side harmonic currents in the smoothing reactor
Annex B (informative) Typical station losses
Annex C (informative) Bibliography
Annex ZA (normative) Normative references to international
publications with their corresponding European publications