SOLVING HARMONIC RESONANCE PROBLEMS ON THE MEDIUM VOLTAGE SYSTEM

Harmonic problems are increasing on MV systems, especially with the application of power factor correction capacitors or extensive underground networks that resulting resonances close to the fifth harmonic. This paper describes two case studies of solving harmonic resonance problems on distribution systems with the design of harmonic filters that provide both power factor correction and harmonic control on the distribution system. The solution on the primary distribution system can be much more economic than trying to solve the problem within customer facilities. General guidelines for the application of harmonic filters on the primary distribution system are developed.

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