1、 IEC TR 61869-100 Edition 1.0 2017-01 TECHNICAL REPORT Instrument transformers Part 100:Guidance for application of current transformers in power system protection IEC TR 61869-100:2017-01(en)colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECLicens
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12、hout license from IHS-,-,-IEC TR 61869-100 Edition 1.0 2017-01 TECHNICAL REPORT Instrument transformers Part 100:Guidance for application of current transformers in power system protection INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 17.220.20 ISBN 978-2-8322-3808-0 Registered trademark of the Inte
13、rnational Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Hong Kong Polytechnic University/9976803100,User=yin,sanNot for Res
14、ale,01/25/2017 06:54:05 MSTNo reproduction or networking permitted without license from IHS-,-,-2 IEC TR 61869-100:2017 IEC 2017 CONTENTS FOREWORD.7 INTRODUCTION.9 1 Scope.10 2 Normative references.10 3 Terms and definitions and abbreviations.10 3.1 Terms and definitions.10 3.2 Index of abbreviation
15、s.12 4 Responsibilities in the current transformer design process.14 4.1 History.14 4.2 Subdivision of the current transformer design process.14 5 Basic theoretical equations for transient designing.15 5.1 Electrical circuit.15 5.1.1 General.15 5.1.2 Current transformer.18 5.2 Transient behaviour.20
16、 5.2.1 General.20 5.2.2 Fault inception angle.22 5.2.3 Differential equation.23 6 Duty cycles.25 6.1 Duty cycle C O.25 6.1.1 General.25 6.1.2 Fault inception angle.27 6.1.3 Transient factor Ktf and transient dimensioning factor Ktd.28 6.1.4 Reduction of asymmetry by definition of the minimum current inception angle.50 6.2 Duty cycle C O C O.53 6.2.1 General.53 6.2.2 Case A:No saturation occurs until t.54 6.2.3 Case B:Saturation occurs between tal and t.56 6.3 Summary.58 7 Determination of the tr
