GB/T 15707-2017Limits of radio interference from high voltage AC overhead power transmission lines (English PDF)
高压交流架空输电线路无线电干扰限值
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2017
Implementation date
July 1, 2018
Scope
GB/T 15707-2017 is the English-translated version of 高压交流架空输电线路无线电干扰限值.
GB/T 15707-2017 sets the limits of radio interference produced by high-voltage AC overhead power transmission lines in normal operation, and how that interference is measured.
It applies to lines from 110 kV to 1000 kV and to interference at frequencies from 0.15 MHz to 30 MHz. The limits are given at 0.5 MHz and 20 m from the projection of the side conductor, rising from 46 dB(µV/m) for 110 kV lines to 58 dB(µV/m) for 750 kV and 1000 kV lines, whose interference in fair weather should not exceed 55 dB(µV/m).
Normative Annex A corrects the limit for other frequencies and the measured field strength for other distances, with worked examples. The terms define the radio interference limit and fair weather.
It replaces GB/T 15707-1995, was issued on 29 December 2017 and has applied since 1 July 2018.
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Document preview — GB/T 15707-2017
National Standard of the People's Republic of China
- ICS
- 33.100
- Classification
- L 06
- Replacing
- GB/T 15707-1995
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 radio interference limit
- 5 radio interference measurement
- Appendix A (Normative) Radio interference correction
- A.1 frequency correction of radio interference limit of overhead AC power transmission line
- A.2 frequency correction application example
- A.3 Radio interference field strength correction
- A.4 distance correction application example
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 15707-1995 "high voltage AC transmission line radio interference limit." This standard and GB/T 15707-1995 compared to the main technical changes are as follows.
--- Increased 750kV and 1000kV AC overhead transmission line radio interference limits.
--- The original Appendix A and Appendix B merged into Appendix A.
--- Removed the original Appendix C on the calculation method.
--- Appendix A limit correction, delete the original formula (A.1) and its explanatory text.
--- The unit of variation of radio interference is dB, and the unit of radio interference is dB (µV/m).
1 Scope
This standard specifies the radio interference limit and measurement of high voltage AC overhead transmission line in normal operation.
This standard applies to 110kV ~ 1000kV AC overhead transmission line generated by the frequency of 0.15MHz ~ 30MHz radio interference.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4365 Electrotechnical terminology Electromagnetic compatibility
GB/T 7349 high voltage overhead transmission lines, substation radio interference measurement methods
3 Terms and definitions
GB/T 4365 defined and the following terms and definitions apply to this document.
3.1 Radio interference limits
Radio interference field strength 80% of the time, with 80% confidence does not exceed the specified value.
Note The unit is µV/m and is usually expressed in dB (µV/m) (1µV/m corresponds to 0dB).
3.2 Good weather
No rain, no snow, no foggy weather.
4 Radio interference limit
4.1 20m away from the side of the wire projection, the frequency of 0.5MHz, high-voltage overhead transmission line radio interference limits listed in Table 1.
a For radio-frequency transmission lines of 750kV and 1000kV AC, the radio interference in good weather should not exceed 55dB (µV/m).
4.2 0.15MHz ~ 30MHz range of other frequencies high voltage AC overhead transmission line radio interference limit in accordance with Appendix A A.1 amendment.
4.3 Other distance measurements of radio interference values in accordance with Appendix A, A.3 amendment. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
Similar standards
Editions of GB/T 15707
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 15707-2017 | Limits of radio interference from high voltage AC overhead power transmission lines | current edition | Current |
| GB/T 15707-1995 | Limits of radio interference from high voltage AC overhead power transmission lines | previous edition | Superseded |
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