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Simplified calculation of maximum groundālevel electric field when two HVDC transmission lines run across at any intersection angle
- Source :
- The Journal of Engineering (2019)
- Publication Year :
- 2018
- Publisher :
- Institution of Engineering and Technology (IET), 2018.
-
Abstract
- When two HVDC transmission lines run across, because of the interaction between the two lines, the maximum ground-level total electric field is not a simple superposition of the maximum ground-level total electric field generated when the two lines exist alone. This paper presents an approximate method to use the maximum ground-level total electric field when only the lower line exists as the maximum ground-level total electric field when two lines run across. Here, the 3D method of characteristics has been improved to make it suitable for structure of two lines intersected at an angle using a method of coordinate transformation. The 3D method of characteristics is used to calculate the theoretical maximum electric field when the two lines run across. The 2D FEM is used to calculate the approximate maximum electric field when only the lower line exists. The approximate results and theoretical results are compared for line structures of ±800 kV line runs across ±800 kV line, ±660 kV line, and ±500 kV line at any intersection angle. The approximate errors are < ±10%, which can meet the engineering requirement.
- Subjects :
- power overhead lines
maximum ground-level electric field
power transmission lines
020209 energy
Coordinate system
voltage 800.0 kV
Energy Engineering and Power Technology
finite element analysis
02 engineering and technology
electric fields
voltage 500.0 kV
Intersection (Euclidean geometry)
Superposition principle
voltage 660.0 kV
Method of characteristics
maximum ground-level total electric field
Electric field
0202 electrical engineering, electronic engineering, information engineering
voltage -500 kV
lower line
approximate maximum electric field
Physics
Mathematical analysis
General Engineering
HVDC power transmission
voltage -800 kV
theoretical maximum electric field
Finite element method
Electric power transmission
lcsh:TA1-2040
HVDC transmission lines
Line (geometry)
voltage -660 kV
lcsh:Engineering (General). Civil engineering (General)
Software
Subjects
Details
- ISSN :
- 20513305
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- The Journal of Engineering
- Accession number :
- edsair.doi.dedup.....e1bf4ca325c26f386cee8385f1798603