Harmonic filter design and power factor correction in a cement factory

This paper presents, a study of harmonic filters design to minimise harmonic distortion caused by harmonic source such as drives and power factor correction in a cement factory. Nonlinear loads and rolling mill drives generate significant harmonic currents that flow through the plant and utility power system. These harmonic currents cause system voltage distortion and power loss in the system and interact with power factor correction capacitor banks leading to equipment failures. Experimental harmonic measurements have been recorded using a power and harmonic measurement device. Different alternatives of filter design have been considered before making the final decision on filter configuration. Among the criteria used for performance evaluation are losses, current, and voltage ratings of each filter and system contingency conditions. The design and performance of single tuned and high pass filters and methodology used for the analysis will be discussed.