Open AccessVoltage sensorless predictive direct power control of three‐phase PWM converters
Author(s) -
Tao YuKun,
Wu Qinghua,
Wang Lei,
Tang Wenhu
Publication year - 2016
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2014.0713
Subject(s) - control theory (sociology) , converters , ac power , pulse width modulation , voltage , observer (physics) , three phase , filter (signal processing) , power (physics) , model predictive control , computer science , engineering , control (management) , physics , electrical engineering , quantum mechanics , artificial intelligence , computer vision
This study develops a voltage sensorless predictive direct power control (PDPC) strategy for three‐phase pulsewidth modulation (PWM) converters using accurate virtual flux (VF) estimation. This proposed PDPC can realise simultaneous control of the instantaneous active and reactive power, and achieve a constant switching frequency operation by adopting an on‐line corrective space vector modulation modulator. AC voltage sensors are removed by using the following two techniques. One is that an accurate VF observer is employed to compensate the magnitude and phase errors introduced by the first‐order low pass filter. The other is that grid voltages are estimated using the VF based estimation of instantaneous active and reactive power as intermediate variables. In addition, the time delay existing in a real system is taken into account in the proposed control model. Comparative results demonstrate the excellent performance of the proposed approach compared with the conventional look‐up‐table DPC and the conventional PDPC.