1 Scope
This standard specifies the technical specifications of single-circuit symmetrically-arranged bipolar HVDC overhead transmission line.
This standard is applicable to the HVDC overhead transmission line with nominal voltage of ±500kV (hereinafter referred to as "DC line"), and the DC lines of other voltage classes may be applied by making reference to this standard.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 6113.1-1995 Specifications for Radio Disturbance and Immunity Measuring Apparatus
GB/T 7349 Methods of Measurement of Radio Interference from High Voltage Overhead Power Transmission Line and Substation
GB 15707 Limits of Radio Interference from AC High Voltage Overhead Power Transmission Lines
GB/T 19443-2004 Insulators for Overhead Lines with a Nominal Voltage Above 1,000V - Ceramic or Glass Insulator Units for d.c. Systems - Definitions, Test Methods and Acceptance Criteria
DL 501 Measurement Method of Audible Noise for Overhead Transmission Lines
DL/T 810-2002 Technical Specification for ±500kV D.C Long Rod Composite Insulators
DL/T 5092-1999 Technical Code for Designing 110~500kV Overhead Transmission Line
3 Terminologies and Definitions
For the purpose of this standard, the following terminologies and definitions apply.
3.1
Electric field effect
The action of electric field under a DC line to person, the feeling of person and the effect caused by impulse electric shock and other electric fields or ion current, which are characterized by such parameters as total field strength above ground, ion current density, space charge density, and induced DC voltage of person or object.
Foreword II
1 Scope
2 Normative References
3 Terminologies and Definitions
4 Meteorological Conditions
5 Conducting Wire, Ground Wire and Hardware Fittings
6 DC Insulator, Insulation Coordination, Lightning Protection and Grounding
7 Conducting Wire Arrangement
8 Radio Interference
9 Audible Noise
10 Influence of DC Line on Telecommunication Line and Protection
11 Ground Clearance and Crossing
Appendix A (Normative) Typical Meteorological Region
Appendix B (Normative) Corona Loss Calculation of Conducting Wire
Appendix C (Normative) Calculation of the Maximum Potential Gradient on Conducting Wire Surface
Appendix D (Normative) Simplified Theoretical Method for Calculation of Total Electric Field Strength above Ground
Appendix E (Informative) Main Dimensions and Electromechanical Features of DC Insulators
Appendix F (Normative) Calculation Methods for the Number of 160kN or 210kN DC Reference Cap and Pin Insulators in Different Polluted Conditions
Appendix G (Informative) Correction of Meteorological Conditions for External Insulation Discharge Voltage
Appendix H (Normative) Calculation of the Influence of DC Transmission Line on Telecommunication Line
