Shielding Effect of HVAC Transmission Lines on the Ion-Flow Field of HVDC Transmission Lines

Author

Zhou, Xiaoxin ; Cui, Xiao ; Lu, Ting ; Liu, Yanbing ; Li, Xin ; He, Jinwei ; Bai, Ruilin ; Zhen, Yongzan

Author_Institution

State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power University, Beijing, China

Volume

28

Issue

2

fYear

2013

fDate

41365

Firstpage

1094

Lastpage

1102

Abstract

The HVDC and HVAC transmission lines running on the same tower is a promising technology to improve the transmission capacity of an existing corridor. The ions generated by corona discharge of HVDC transmission lines will strengthen the ground-level electric field, which may endanger human exposure. To investigate how the presence of HVAC transmission lines changes the ion-flow field, experiments are carried out on an indoor test model with bipolar dc and three-phase ac lines. The experiment results are then compared with the simulation results. The experiment and simulation results show that the HVAC transmission lines have a shielding effect on the ion-flow field from the HVDC transmission lines running above. Finally, the ground-level electric field and ion current density of the $\\pm$ 800–kV HVDC and 500-kV HVAC transmission lines running on the same tower are calculated.

Keywords

Corona; Current density; Power transmission lines; Transmission line measurements; Voltage measurement; Wires; HVDC transmission line; hybrid lines; ion-flow field; shielding effect;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2012.2225450

Filename

6387344