Simulation of the electric field on the surface of the sub-conductor of ±1100kV UHVDC transmission lines

摘要

Ultra high-voltage direct current (UHVDC) transmission projects of ±1100kV have been in design and construction in China, recently. The electromagnetic environment with corona discharge phenomenon of UHVDC transmission lines has been of interest for engineers. It is necessary to control the electric field strength of the sub-conductors of the power lines because the field on the lines has significant impacts on radio interference (RI), audible noise (AN) and ionized electric field on the ground. In this paper, the electric field on the sub-conductor surfaces are analyzed by the charge simulation method (CSM). The configuration of ±1100kV UHVDC power lines are suggested in order to limit the electromagnetic environment nearby, which may provide useful reference for the design of ±1100kV UHVDC transmission lines.