Experimental Research of Effectiveness of Active Shielding System of Overhead Transmission Lines Magnetic Field with Various Control Algorithms

Field experimental research of the effectiveness of single-circuit active shielding system of magnetic field generated by group of overhead high voltage power lines with various control algorithms carried out. It is shown that the efficiency of closed-loop system with feedback control, open-loop system with forward control and combine closed-loop and open-loop system with feed forward control is approximately the same and is more than 4 units. Experimentally established that effectiveness of closed-loop system with feedback control depends on the location of the magnetic field sensors in the shielding zone. Comparison of the results of experimental and calculated values of magnetic field induction in the shielding zone shows that their spread does not exceed 20%.