Title :
Application of zigzag transformers for reducing harmonics in the neutral conductor of low voltage distribution system
Author_Institution :
3M Co., St. Paul, MN, USA
Abstract :
The use of zigzag transformers for reducing harmonics in the neutral conductors of a three-phase, 208 V/120 V distribution system is presented. Third-harmonic currents add up in the neutral conductor of the distribution system, thereby feeding nonlinear loads. Other solutions to this problem include derating the size of the distribution transformer by 50%. Application of the zigzag transformer eliminates the need for this derating. Measurements of current draw before and after the installation of a zigzag transformer are presented.<>
Keywords :
distribution networks; power transformers; 120 V; 208 V; distribution system; harmonics reduction; low voltage distribution system; neutral conductor; nonlinear loads; third harmonic currents; three-phase; zigzag transformers; Application software; Coils; Conductors; Impedance; Low voltage; Microcomputers; Power system harmonics; Switched-mode power supply; Switches; Transformers;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152320
