Title :
The feasibility of magnetic field reduction by phase relationship optimization in cable systems
Author :
Karady, George G. ; Nunez, Carlos V. ; Raghavan, Ramanan
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
This paper investigates the feasibility of magnetic fields reduction by optimization of phase relationships in a multi-circuit underground power cable system, carrying unbalanced loads. A novel algorithm was developed for fast calculation of the multi-circuit power cable system-generated magnetic field. The unbalanced load was modeled by random selection of phase current values. A computer code was written to calculate the statistical distribution of the magnetic field above the cables on the ground level. The program calculates the maximum magnetic field for different phase relationships and selects the optimum phase relationship. Several multi-circuit power cable systems used by electric utilities have been analyzed. The results show that the optimization of phase relationships effectively reduces the magnetic field for power cable systems with both single and multi-point grounded sheaths in spite of the load unbalance
Keywords :
Monte Carlo methods; load (electric); magnetic fields; magnetic shielding; optimisation; power cables; power engineering computing; underground cables; algorithm; computer code; computer simulation; electric utilities; feasibility study; grounded sheaths; magnetic field reduction; multi-circuit underground power cables; phase relationship optimization; statistical distribution; unbalanced loads; Cable shielding; Conductors; Earth; Equations; Grounding; Impedance; Magnetic analysis; Magnetic circuits; Magnetic fields; Power cables;
Journal_Title :
Power Delivery, IEEE Transactions on
