Study of microturbine impacts on a distribution system
Abstract
Distributed generation systems have become the new focus of the world
and microturbine generation system is one of the systems. The connection of a
microturbine generator to a distribution system requires the use of an
alternating current/ direct current/ alternating current, AC/DC/AC power
converter which in turn creates a harmonic problem to the distribution system. A
modelling of a microturbine generation system using Power System Computer
Aided Design, PSCAD sof tware is presented and the harmonic impact of the
microturbine generation system on the distribution system is investigated. The
necessity of reducing the harmonics injected by the microturbine generation
system into the grid is solved by introducing three different types of filters in the
system which is a passive filter, an active filter and a hybrid filter. The
simulations of the microturbine generation system for each type of filter are done
and the waveforms of total harmonic distortion, THD and harmonic spectrum
of the grid current with the use of each filter in the system are studied. The
study shows that the hybrid filter provides the largest harmonic reduction in
the grid current compared to the passive and active filter.