AS 61400.21-2006

1 Scope2 Normative references3 Definitions4 Symbols and units5 Abbreviations6 Wind turbine power quality characteristic parameters 6.1 General 6.2 Rated data 6.3 Maximum permitted power 6.4 Maximum measured power 6.5 Reactive power 6.6 Voltage fluctuations 6.6.1 Continuous operation 6.6.2 Switching operations 6.7 Harmonics7 Measurement procedures 7.1 General 7.1.1 Test conditions 7.1.2 Test equipment 7.2 Rated data 7.3 Maximum permitted power 7.4 Maximum measured power 7.5 Reactive power 7.6 Voltage fluctuations 7.6.1 Fictitious grid 7.6.2 Continuous operation 7.6.3 Switching operations 7.7 Harmonics8 Assessment of power quality 8.1 General 8.2 Steady-state voltage 8.3 Voltage fluctuations 8.3.1 Continuous operation 8.3.2 Switching operations 8.4 HarmonicsAnnex A (informative) Sample report format A.1 General data A.2 Rated data A.3 Maximum permitted power A.4 Maximum measured power A.5 Reactive power A.6 Voltage fluctuations A.7 HarmonicsAnnex B (informative) Voltage fluctuations and flicker B.1 Continuous operation B.2 Switching operations B.3 Weighting of flicker coefficients B.4 Deduction of definitionsAnnex ZA (informative) Wind turbine properties and their effects on power quality ZA.1 General ZA.2 Effects on the network ZA.3 Effects from the networkBibliography