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

• Published in: IEEE transactions on power delivery Vol. 28; no. 2; pp. 1094 - 1102
• Main Authors: Zhou, Xiangxian, Cui, Xiang, Lu, Tiebing, Liu, Yang, Li, Xuebao, He, Jiamei, Bai, Ru, Zhen, Yongzan
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2013; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Corona; Current density; Direct current networks; Electrical engineering. Electrical power engineering; Electrical power engineering; Electromagnetic compatibility; Exact sciences and technology; HVDC transmission line; hybrid lines; Information, signal and communications theory; ion-flow field; Miscellaneous; Power networks and lines; Power transmission lines; shielding effect; Telecommunications and information theory; Transmission line measurements; Users connections and in door installation; Voltage measurement; Wires; Electric energy transportation; HVAC systems; Three phase line; Electromagnetic shielding; Field experiment; HVDC power transmission; shielding effect; HVDC transmission line; Transmission line; Indoor installation; Biological effect; Current density; Corona effect; Alternating current; Channel capacity; Transmission capacity; Shielding; Experimental study; Flow field; Three phase current; ion-flow field; Electric field; hybrid lines; System simulation; High voltage line; Comparative study
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2012.2225450

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 ±800-kV HVDC and 500-kV HVAC transmission lines running on the same tower are calculated.