Power quality improvement of dispersed generation systems using hybrid filter
Shahnia, F. and Hosseini, S.H. (2005) Power quality improvement of dispersed generation systems using hybrid filter. In: 2nd ECTI International Conference (ECTI-CON) 2005, 12 - 13 May 2005, Pattaya, Thailand
A hybrid filter constructed of a shunt active filter and distributed passive filters used for power quality improvement in dispersed generation system is presented. The distribution system consists of two wind turbines using induction generators for producing the required active power and several dynamic nonlinear loads. The power quality problems of dispersed generation LV or MV systems are introduced and the necessity of using hybrid filters instead of active or passive filters alone are discussed. The simulation is done with PSCAD/EMTDC software for a distribution system with dynamic nonlinear loads and wind turbines without any filters, with usage of just shunt active filter or passive filters and the hybrid filter structure, introduced in the paper. Studying and comparing the waveforms, frequency spectrums, harmonic contents and THD of the system current with different filter structures mentioned, proves power quality improvement by the applied hybrid filter.
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