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A Case Study of Resonance in 11kV Network in the Presence of Series Current Limiting Reactors, VSDs and Power Factor Improvement Capacitors

Yadavalli Venkata Sridhar
Kuwait Oil Company

Abstract—Presence of electrical network elements such as reactors, power factorcapacitors along with harmonics injecting loads such as Variable Speed drives create an ideal situation for resonant conditions in an industrial electrical network. This paper attemptsto identify various conditions that influence the resonance situation in the 11KV network of hydrocarbon industry and its sensitivity toinfluencing factors isassessed.Further, the effect of detuning reactorin the power factor capacitors on the THD values, harmonic frequency and other parameters is studied. Based on the case study,the impact of configuration of electrical network and variation of capacitance in the electrical network on the THD and harmonic frequency is established.

Index Terms—harmonics, resonance, capacitors banks

Cite: Yadavalli Venkata Sridhar, "A Case Study of Resonance in 11kV Network in the Presence of Series Current Limiting Reactors, VSDs and Power Factor Improvement Capacitors," International Journal of Electrical Energy, Vol. 2, No. 4, pp. 268-277, December 2014. doi: 10.12720/ijoee.2.4.268-277

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