1、 IEC/TS 62758 Edition 1.0 2012-09 TECHNICAL SPECIFICATION Calibration of space charge measuring equipment based on the pulsed electro-acoustic(PEA)measurement principle IEC/TS 62758:2012(E)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2
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10、n 1.0 2012-09 TECHNICAL SPECIFICATION Calibration of space charge measuring equipment based on the pulsed electro-acoustic(PEA)measurement principle INTERNATIONAL ELECTROTECHNICAL COMMISSION V ICS 17.220.99;29.035.01;29.080.30 PRICE CODE ISBN 978-2-83220-336-1 Registered trademark of the Internation
11、al Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.
12、Uncontrolled when printed.2 TS 62758 IEC:2012(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 Basic theory for measurement.8 4.1 Permittivity and induced charge density.8 4.2 Charge in dielectrics and Poissons law.8 4.3 Coulombic force of charge in
13、 electric field.9 4.4 Reflection and transmission of pressure wave.9 4.5 Maxwell stress.9 4.6 Response of linear system.10 5 Procedure to calibrate the space charge measurement.10 5.1 Principle of calibration.10 5.1.1 General.10 5.1.2 Typical result of calibration measurement.11 5.2 Sample preparati
14、on.12 5.2.1 Sample for calibration measurement.12 5.2.2 Sample placement.13 5.3 Data acquisition.13 5.3.1 Pulse voltage test.13 5.3.2 Averaging.13 5.3.3 Data acquisition for calibration.14 5.3.4 Signal obtained under short circuit condition.15 5.4 Data processing and calibration.15 5.4.1 Deconvoluti
15、on.15 5.4.2 Calibration for horizontal axis and calculation of waveform for electric field distribution.16 5.4.3 Calibration for electric field and charge density distributions.16 5.4.4 Confirmation of linearity of measurement.17 5.4.5 Typical test results by expert members of project team.17 Annex
16、A(informative)Theory of PEA method.21 Bibliography.35 Figure 1 Theoretical distributions for calibration measurement.11 Figure 2 Typical result of calibration measurement.12 Figure 3 Drop of silicone oil and sample placement.13 Figure 4 Pulse voltage application test.13 Figure 5 Dependence of averaging number.14 Figure 6 Measurement of waveform for calibration.15 Figure 7 Confirmation of absence of space charge accumulation during d.c.voltage application for calibration.15 Figure 8 Deconvolut