Title :
Optimized reduction of the magnetic field near Swedish 400 KV lines by advanced control of shield wire currents. Test results and economic evaluation
Author :
Jonsson, U. ; Larsson, A. ; Sjödin, J-O
Author_Institution :
Svenska Kraftnat, Vallingby, Sweden
fDate :
4/1/1994 12:00:00 AM
Abstract :
The design of existing Swedish 400 kV lines is described, especially as regards parameters influencing the characteristics of the magnetic field. Field reduction possibilities by introducing controlled shield wire currents on the relatively new delta configuration are analyzed together with results from tests on a line in operation. The use of a regulator to optimize each shield wire current separately in order to compensate for asymmetry is demonstrated
Keywords :
electric current control; electromagnetic fields; electromagnetic interference; magnetic shielding; magnetic variables control; optimal control; power overhead lines; power system control; 400 kV; EHV; Sweden; asymmetry; compensation; current regulators; delta configuration; design; magnetic field; optimal control; shield wire currents; Conductors; Magnetic analysis; Magnetic circuits; Magnetic field measurement; Magnetic fields; Magnetic shielding; Poles and towers; Power generation economics; Testing; Wire;
Journal_Title :
Power Delivery, IEEE Transactions on
