CAPACITOR PLACEMENT IN UNBALANCED POWER SYSTEMS

This paper presents a capacitor placement method for three phase unbalanced power systems. The method aims to minimize not only the power losses and capacitor costs, but also the distortions due to harmonics present in the power system. The proposed method is capable of accomplishing this objective for both balanced and unbalanced operating conditions. One of the objec- tives of this paper is to demonstrate the significant differ- ences in the results of capacitor placement studies when unbalanced systems are approximated by their positive sequence single phase equivalents. Furthermore, the ef- fects of taking harmonic distortions into account during the capacitor placement procedure are also demonstrated. Numerical examples on a distribution test power system are provided to illustrate the method.

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