1、 TECHNICAL REPORT IECTR 61000-2-14 First edition2006-12 Electromagnetic compatibility(EMC)Part 2-14:Environment Overvoltages on public electricity distribution networks Reference number IEC/TR 61000-2-14:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIE
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8、19 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL REPORT IECTR 61000-2-14 First edition2006-12 Electromagnetic compatibility(EMC)Part 2-14:Environment Overvoltages on public electricity distributio
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11、OREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 61000-2-14 IEC:2006(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 Description of overvoltages.10 4.1 General.10 4.2 External overvoltages.11 4.3 Internal overvoltages.1
12、1 4.4 Overvoltage waveshape.11 5 Long duration overvoltages.12 5.1 Sustained earth faults.12 5.2 Broken neutral on LV network.12 5.3 Maloperation of voltage regulating equipment.13 5.4 Overvoltages due to voltage unbalances.13 5.5 Dispersed generation.14 6 Short duration overvoltages.15 6.1 Earth fa
13、ults.15 6.2 Load rejection(sudden load loss).16 6.3 Self-excitation.16 6.4 Resonance and ferroresonance.16 7 Very short duration overvoltages(transients).18 7.1 General description.18 7.2 Lightning.19 7.3 Switching.20 7.4 Summary of surge duration and cause.26 8 Effects of overvoltages on equipment.
14、27 8.1 General considerations.27 8.2 Reduction in life of filament lamps.28 8.3 Effect of overvoltages on IT equipment.28 9 Case studies.29 9.1 General.29 9.2 Switching of LV power factor correction capacitor.29 9.3 Metal fusion furnace.30 9.4 Switching of MV power factor correction capacitor.31 9.5
15、 DC traction system.32 9.6 Load switching.34 10 Protection against the effects of overvoltages.36 10.1 General considerations.36 10.2 Point on wave switching.36 10.3 Arcing horns and spark gaps.37 10.4 Overvoltage protection relays.38 10.5 Snubbers(high frequency RC filter).38 10.6 Uninterruptible p
16、ower supply(UPS)systems.39 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TR 61000-2-14 IEC:2006(E)3 10.7 Surge protection device(SPD).39 11 Conclusions.41 12 Recommendations.42 Bibliography.43 Figure 1 Lightning impulse test voltage characteristic.11 Figure 2 Broken neutral on LV network.13 Figure 3 The effect of distributed generation on network voltage.14 Figure 4 Line Neutral temporary overvoltage on healthy phase for single p