Open AccessInteraction and coordination between reactive compensation and harmonic suppression for three‐phase buck‐type D‐CAP
Author(s) -
Chen Xinwen,
Dai Ke,
Zhang Yuxiao,
Peng Li,
Dai Ziwei
Publication year - 2019
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.2018.5139
Subject(s) - compensation (psychology) , harmonic , phase (matter) , control theory (sociology) , type (biology) , materials science , physics , computer science , psychology , control (management) , social psychology , acoustics , artificial intelligence , geology , quantum mechanics , paleontology
Dynamic capacitor (D‐CAP) could be designed to compensate reactive power and suppress harmonic currents simultaneously by means of regulating DC and harmonic terms in duty‐ratio modulation signal. However, the main constraint is that the amplitudes of DC and harmonic terms are always correlative, leading to the interaction between reactive and harmonic currents of D‐CAP. To minimise mutual effects between reactive and harmonic currents, this study presents coordinated control between reactive compensation and harmonic suppression for buck‐type D‐CAP. The major concern of coordinated algorithm is to pre‐estimate and select the DC and harmonic terms reasonably according to their inter‐constraint relationship. Thus, D‐CAP can optimise the generation of reactive and harmonic current references in different scenarios. Meanwhile, selective current control in multiple synchronous reference frames is employed to regulate reactive and harmonic current effectively. A series of experimental results are provided to verify the correctness of proposed coordinated control.