1 Scope
This standard specifies the problem of compatibility between semiconductor convertors and power supply system and also provides the processing principles and methods of mutual interference.
This standard is a supplement in aspect of compatibility between semiconductor convertors and power supply system on basis of GB/T 3859.
This standard is applicable to the line commutated semiconductor convertors, and other types of semiconductor convertors may refer to this standard.
This standard does not concern the compatibility problem in aspect of audio frequency or radio frequency.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding correction) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
Foreword I
1 Scope 1
2 Normative References 1
3 Term and Definitions 2
4 Disturbance of Convertor to Line 6
4.1 Convertor Generated Disturbances 6
4.2 Line-side Current Harmonics and Voltage Harmonics 7
4.3 Commutation Notch 19
4.4 Voltage Fluctuation and Flicker 23
5 Immunity of Convertor to Line Disturbance 29
5.1 General 29
5.2 Convertor Immunity Class 29
5.3 Convertor Immunity Limit 30
6 Estimation of Compatibility of the Convertor and the Line 33
6.1 Classification of Power Distribution Bus 33
6.2 Contents and Procedures of Compatibility Estimation 34
7 Power Factor Compensation and Parallel Resonance 34
7.1 General 34
7.2 Power Factor of Convertor 35
7.3 Power Factor Compensation 40
7.4 Parallel Resonance 44
8 Measurement 47
8.1 General 47
8.2 Measurement of Harmonic 47
8.3 Measurement of Flicker 53
8.4 Measurement of Unbalance Factor 56
8.5 Measurement of Power Factor 57
8.6 Measurement of Commutation Notch 57
Appendix A (Informative) Examples of the Calculation of Minimum Relative Short-circuit Power Rsc and Short-circuit Capacity According to the Requirements of Limiting the Voltage Fluctuation 59
Appendix B (Informative) Compatibility Estimation 60
Appendix C (Informative) Calculation of Compensation Capacity of Phase-shifting Capacitor 65
Appendix D (Informative) Calculation of Amplification Coefficient of Harmonics with AC Motor Load Existing 66
