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GB/T 18039.4-2017 English PDF (GBT18039.4-2017)

GB/T 18039.4-2017 English PDF (GBT18039.4-2017)

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GB/T 18039.4-2017: Electromagnetic compatibility -- Environment -- Compatibility levels in industrial plants for low-frequency conducted disturbances

GB/T 18039.4-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 33.100.10; 33.100.20
L 06
GB/T 18039.4-2017 / IEC 61000-2-4:2002
Replacing GB/T 18039.4-2003
Electromagnetic Compatibility - Environment -
Compatibility Levels in Industrial Plants for Low-frequency
Conducted Disturbances
(IEC 61000-2-4:2002, Electromagnetic Compatibility (EMC) - Part 2-4: Environment - Compatibility Levels in Industrial Plants for Low-frequency Conducted Disturbances, IDT)
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 1, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 7
3 Terms and Definitions ... 7
3.1 General Definitions ... 8
3.2 Phenomena-related Definitions ... 9
4 Electromagnetic Environment Classes ... 12
5 Compatibility Levels ... 13
5.1 General Comment ... 13
5.2 Voltage Deviations ... 14
5.3 Voltage Dips and Short Interruptions ... 14
5.4 Voltage Unbalance (imbalance) ... 14
5.5 Temporary Power-frequency Variation ... 15
5.6 Harmonics ... 15
5.7 Interharmonics ... 16
5.8 Voltage Components at Higher Frequencies (above 50th harmonic) ... 17 5.9 Transient Overvoltages ... 17
5.10 DC Component ... 17
6 Compatibility Levels ... 17
Appendix A (informative) Explanations and Examples for Interharmonics ... 21 A.1 Resolution of Non-sinusoidal Voltages and Currents... 21
A.2 Time Varying Phenomena ... 22
A.3 Definition of Additional Terms ... 22
Appendix B (informative) Examples of Expected Disturbance Levels in Typical Industrial Networks ... 24
B.1 Voltage Disturbance Levels in Industrial Networks due to Large Converters ... 24 B.2 Voltage Disturbance Levels in Industrial Networks at High Load ... 26 B.3 Voltages Dips and Short Interruption ... 28
B.4 Transient Overvoltages ... 30
Appendix C (informative) Interharmonic and Voltages at Higher Frequencies ... 32 C.1 Sources of Interharmonics ... 32
C.2 Mitigation Methods ... 37
C.3 Voltages at Higher Frequencies ... 39
Bibliography ... 41
Foreword
Electromagnetic Compatibility - Environment currently consists of the following parts: ---GB/Z 18039.1 Electromagnetic Compatibility - Environment - Classification of Electromagnetic Environments
---GB/Z 18039.2 Electromagnetic Compatibility - Environment - Assessment of the Emission Levels in the Power Supply of Industrial Plants as regards Low-frequency Conducted Disturbances
---GB/T 18039.3 Electromagnetic Compatibility - Environment - Compatibility Levels for Low-frequency Conducted Disturbances and Signaling in Public Low-voltage Power Supply Systems
---GB/T 18039.4 Electromagnetic Compatibility - Environment - Compatibility Levels in Industrial Plants for Low-frequency Conducted Disturbances
---GB/Z 18039.5 Electromagnetic Compatibility - Environment - Electromagnetic Environment for Low-frequency Conducted Disturbances and Signaling in Public Power Supply Systems
---GB/Z 18039.6 Electromagnetic Compatibility - Environment - Low Frequency Magnetic Fields in Various Environments
---GB/Z 18039.7 Electromagnetic Compatibility - Environment - Voltage Dips and Short Interruptions on Public Electric Power Supply Systems with Statistical Measurement Results
---GB/T 18039.8 Electromagnetic Compatibility - Environment - Description of HEMP Environment - Conducted Disturbance
---GB/T 18039.9 Electromagnetic Compatibility - Environment - Compatibility Levels for Low-frequency Conducted Disturbances and Signaling in Public Medium-voltage Power Supply Systems
This is Part 4 of Electromagnetic Compatibility - Environment.
This Part was drafted in accordance with the rules provided in GB/T 1.1-2009. This Part serves as a replacement of GB/T 18039.4-2003 Electromagnetic Compatibility - Environment - Compatibility Levels in Industrial Plants for Low-frequency Conducted Disturbances.
In comparison with GB/T 18039.4-2003, the main technical changes are as follows: ---The references to IEC 60050-101, IEC 60050-551 and IEC 61000-2-12 are added (see Chapter 2);
---The definition of “total disturbance level” is deleted; the definitions of “electromagnetic disturbance”, “disturbance level”, “planning level”, “fundamental frequency”, “fundamental component”, “harmonic frequency”, “harmonic component”,
“interharmonic frequency”, “inter-harmonic component”, “total harmonic distortion”, “voltage unbalance”, “voltage deviation”, “voltage dip” and “transient overvoltage” are added (see Chapter 3);
---The relevant description of electromagnetic environment classification is modified (see Chapter 4);
---In terms of compatibility levels, the general description, and the description of compatibility levels regarding voltage deviation, voltage unbalance, power-frequency variation, harmonics and inter-harmonics are modified; the description of compatibility levels regarding voltage components at higher frequencies, transient overvoltage and d.c. component is added (see Chapter 5);
---The illustration of interharmonic compatibility levels is added (see Figure 1 of Chapter 6);
---The explanations and examples for interharmonics are added (see Appendix A); ---The production and mitigation methods for interharmonics and voltage components at higher frequencies are added (see Appendix C).
This Part uses the translation method in the equivalent adoption of IEC 61000-2-4:2002 Electromagnetic Compatibility (EMC) - Part 2-4: Environment - Compatibility Levels in Industrial Plants for Low-frequency Conducted Disturbances.
The Chinese documents that have consistent correspondence with the international documents normatively cited in this Part are as follows:
---GB/T 4365-2003 Electrotechnical Terminology - Electromagnetic Compatibility (IEC 60050(161):1990, IDT)
---GB/T 18039.3-2017 Electromagnetic Compatibility - Environment - Compatibility Levels for Low-frequency Conducted Disturbances and Signaling in Public Low- voltage Power Supply Systems (IEC 61000-2-2:1990, IDT)
---GB/T 18039.9-2013 Electromagnetic Compatibility - Environment - Compatibility Levels for Low-frequency Conducted Disturbances and Signaling in Public Medium- voltage Power Supply Systems (IEC 61000-2-12:2003, IDT)
Electromagnetic Compatibility - Environment -
Compatibility Levels in Industrial Plants for Low-frequency
Conducted Disturbances
1 Scope
This Part of GB/T 18039 is concerned with conducted disturbances in the frequency range from 0 kHz to 9 kHz. It gives numerical compatibility levels for industrial and non-public power distribution systems.
This Part is applicable to AC 50 Hz low-voltage and medium-voltage power supply systems. Power supply systems on ships, aircraft, offshore platforms and railways are not included. The compatibility levels specified in this Part apply at the in-plant point of coupling (IPC). At the power input terminals of equipment receiving its supply from the above systems, the severity levels of the disturbances can, for the most part, be taken to be the same as the levels at the in-plant point of coupling. In some situations, this is not so, particularly in the case of a long feeder dedicated to the supply of a particular load, or in the case of a disturbance generated or amplified within the installation of which the equipment forms a part. Compatibility levels are specified for electromagnetic disturbances of the types which can be expected at any in-plant point of coupling (IPC) within industrial plants or other non-public networks, for guidance in
a) limits to be set for disturbance emission into industrial power supply systems (including the planning levels defined in 3.1.5);
NOTE 1 A very wide range of conditions is possible in the electromagnetic environments of industrial and other non-public networks. These are approximated in this Part by the three classes described in Chapter 4. However, it is the responsibility of the operator of such a network to take account of the particular electromagnetic and economic conditions, including equipment characteristics, in setting the above-mentioned limits. b) the choice of immunity levels for the equipment within these systems. The disturbance phenomena considered are:
– voltage deviations;
– voltage dips and short interruptions;
– voltage unbalance;
– power-frequency variations;
NOTE 3 Electronic converters produce characteristic harmonic orders due to their topology when used under their rated operating conditions. Different operating conditions such as unbalance, non-ideal commutation instants, etc. may cause other harmonic orders to be produced.
The voltage unbalance caused by a single-phase load connected line-to-line is in practice equal to the ratio of the load power to the network three-phase short circuit power. If no substantial single-phase load is present, the compatibility levels of class 2 may be applied. 5.5 Temporary Power-frequency Variation
The compatibility levels of power-frequency deviations of the public network apply to industrial plants fed from the public power supply.
For the most part, the range is within 1 Hz of the nominal frequency as stated in 4.8 of IEC 61000-2-2. Where synchronous interconnection is implemented on a continental scale, the variation is usually very much less.
The compatibility level for the temporary variation of frequency from the nominal frequency is  1 Hz. The steady-state deviation of frequency from the nominal frequency is much less. NOTE 1 For some equipment the rate of change of frequency is significant. NOTE 2 In the case of supply systems isolated from the public network, frequency variations up to  4% are expected. The actual compatibility levels in this instance are to be agreed upon. 5.6 Harmonics
The compatibility levels for individual harmonic components of the voltage shall be understood to relate to quasi-stationary or steady-state harmonics and are given as reference values for both long-term effects and very short-term effects.
The long-term effects relate mainly to thermal effects on cables, transformers, motors, capacitors, etc. They arise from harmonic levels which are sustained for periods equal to or higher than 10 min.
With reference to long-term effects, compatibility levels for individual harmonic components of the voltage are given in Tables 2 to 4. The corresponding compatibility levels for the total harmonic distortion are given in Table 5.
Very short-term effects relate mainly to disturbing effects on electronic devices that may be susceptible to harmonic levels sustained for 3 s or less. Transients are not included. With reference to very short-term effects in class 1 and class 3, compatibility levels for individual harmonic components of the voltage, and for total harmonic distortion, are 1.5 times the values given in Tables 2 to 5.
In class 2, they are the values given in Tables 2 to 4 multiplied by a factor k, where k is as

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