This standard specifies the Electromagnetic environment parameters limit for ±800kV UHV DC transmission lines under normal operation, including the limit for total ground electric field strength, DC magnetic field, ion current density, radio interference, audible noise and etc.
This standard is applicable to the ±800kV UHV DC overhead lines, and DC lines of other voltage grades may be implemented by reference.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 7349 Methods of Measurement of Radio Interference from High Voltage Overhead Power Transmission Line and Substation (GB/T 7349-2002, IEC/CISPR 18: 1983, EQV)
DL 501 Aerial Power Transmission Line Audible Noise Measuring Method
DL/T 1089 Measurement Method for Total Electric Field Strength and Ion Current Density of the Converter Station and DC Transmission Lines
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
Total electric field strength
The synthetic electric field strength of the field generated by the electric charge on DC live conductor and that generated by space charge caused by conductor corona is referred to as total electric field strength, kV/m. The value of total electric field strength on the ground surface is the total ground electric field strength.
