Abstract :
This paper presents an exhaustive survey of controller strategies in synchronous reference frames recently
adopted. With the general use of harmonic generating devices, controlling the harmonic currents to maintain
a high level of quality of energy becomes increasingly important. This paper presents a detailed approach of
conventional PI control strategy and two-degrees-of-freedom internal model control strategy. The advantage
of 2DF-IMC strategy over the conventional PI solution is a significant increase in the speed of harmonic
detection and mitigation. Furthermore, this control strategy reduces the computational burden when applied
in a digital controller. These characteristics make this strategy desirable for applications where
fast/harmonic detection and mitigation are needed. The techniques are mathematically analyzed and
simulation results are obtained for convention PI strategy which are compared in terms of compensation
performance..
Keyword :
Power Quality Synchronous Reference Frame, I, 2DF-IMC strategy, Harmonic mitigation