Open AccessOPEN unified power quality conditioner with control based on enhanced phase locked loop
Author(s) -
Teke Ahmet,
Meral Mehmet Emin,
Cuma Mehmet Uğraş,
Tümay Mehmet,
Bayindir Kamil Çağatay
Publication year - 2013
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2012.0275
Subject(s) - harmonics , voltage sag , control theory (sociology) , phase locked loop , inverter , integrator , active filter , engineering , swell , total harmonic distortion , voltage , open loop controller , ac power , electronic engineering , computer science , control engineering , power quality , electrical engineering , closed loop , physics , control (management) , artificial intelligence , jitter , thermodynamics
OPEN unified power quality conditioner (UPQC) offers different power quality levels with different electricity bill to their users. OPEN UPQC has more flexible modularity than traditional UPQC for field applications. OPEN UPQC consists of two controlled pulse‐width modulated shunt and series inverters that have no common DC link. Shunt inverter eliminates current harmonics originating from non‐linear load side and series inverter mitigates voltage sag/swell at the point of common coupling caused from faults on transmission system. In this study, controllers for both shunt and series inverters are based on enhanced phase locked loop (E‐PLL) and non‐linear adaptive filter. For the controller of shunt inverter, proportional integrator controller‐based DC‐link control strategy is adapted to E‐PLL. A fast sag/swell detection method is also presented. Functionalities of OPEN‐UPQC system is deeply analysed and tested through simulation studies with power system computer aided design/electromagnetic transients DC analysis program. The test results verify that OPEN UPQC achieves good performance for mitigating the effects of voltage sag/swell and suppressing the load current harmonics.