COMPARISON OF STANDARDS AND POWER-SUPPLY DESIGN OPTIONS FOR LIMITING HARMONIC DISTORTION IN POWER-SYSTEMS

Harmonic distortion in power systems is growing due to the popularity of switch-mode power electronic equipment. This equipment has recogniz ed advantages, such as reducing weight and improving control and effic iency in power converters and supplies. A disadvantage of switch-mode power converters is that their lowest-cost circuit may burden the powe r system with harmonic loading. Methods to reduce this distortion are recognized, but economic incentives are yet to be realized. Standardiz ation is the most effective means to influence equipment design and to control distortion in power systems. This paper compares the major Eu ropean and American standards, as well as some of the electronic equip ment design changes that are supposed to limit harmonics.