ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 3-6: LIMITS - ASSESSMENT OF EMISSION LIMITS FOR THE CONNECTION OF DISTORTING INSTALLATIONS TO MV, HV AND EHV POWER SYSTEMS
International Electrotechnical Committee
FOREWORD
INTRODUCTION
ACKNOWLEDGMENT
1 Scope
2 Normative references
3 Terms and definitions
4 Basic EMC concepts related to harmonic distortion
4.1 Compatibility levels
4.2 Planning levels
4.3 Illustration of EMC concepts
4.4 Emission levels
5 General principles
5.1 Stage 1: simplified evaluation of disturbance emission
5.2 Stage 2: emission limits relative to actual system
characteristics
5.3 Stage 3: acceptance of higher emission levels on a
conditional basis
5.4 Responsibilities
6 General guidelines for the assessment of emission levels
6.1 Point of evaluation
6.2 Definition of harmonic emission level
6.3 Assessment of harmonic emission levels
6.4 System harmonic impedance
7 General summation law
8 Emission limits for distorting installations connected
to MV systems
8.1 Stage 1: simplified evaluation of disturbance emission
8.2 Stage 2: emission limits relative to actual system
characteristics
8.3 Stage 3: acceptance of higher emission levels on a
conditional basis
8.4 Summary diagram of the evaluation procedure
9 Emission limits for distorting installations connected to
HV-EHV systems
9.1 Stage 1: simplified evaluation of disturbance emission
9.2 Stage 2: emission limits relative to actual system
characteristics
9.3 Stage 3: acceptance of higher emission levels on a
conditional basis
10 Interharmonics
Annex A (informative) - Envelope of the maximum
expected impedance
Annex B (informative) - Guidance for allocating planning
levels and emission levels at MV
Annex C (informative) - Example of calculation of global
MV+LV contribution
Annex D (informative) - Method for sharing planning
levels and allocating emission limits in meshed
HV - EHV systems
Annex E (informative) - List of symbols and subscripts
Bibliography
Specifies guidance on principles which can be used as the basis for determining the requirements for the connection of distorting installations to MV, HV and EHV public power systems (LV installations are covered in other IEC documents).
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 77 |
| Supersedes |
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