TY - JOUR
T1 - Enhanced predictive current control of three-phase grid-tied reversible converters with improved switching patterns
AU - Song, Zhanfeng
AU - Tian, Yanjun
AU - Chen, Zhe
AU - Hu, Yanting
PY - 2016
Y1 - 2016
N2 - A predictive current control strategy can realize flexible regulation of three-phase grid-tied converters based on system behaviour prediction and cost function minimization. However, when the predictive current control strategy with conventional switching patterns is adopted, the predicted duration time for voltage vectors turns out to be negative in some cases, especially under the conditions of bidirectional power flows and transient situations, leading to system performance deteriorations. This paper aims to clarify the real reason for this phenomenon under bidirectional power flows, i.e.; rectifier mode and inverter mode, and, furthermore, seeks to propose effective solutions. A detailed analysis of instantaneous current variations under different conditions was conducted. An enhanced predictive current control strategy with improved switching patterns was then proposed. An experimental platform was built based on a commercial converter produced by Danfoss, and moreover, relative experiments were carried out, confirming the superiority of the proposed scheme.
AB - A predictive current control strategy can realize flexible regulation of three-phase grid-tied converters based on system behaviour prediction and cost function minimization. However, when the predictive current control strategy with conventional switching patterns is adopted, the predicted duration time for voltage vectors turns out to be negative in some cases, especially under the conditions of bidirectional power flows and transient situations, leading to system performance deteriorations. This paper aims to clarify the real reason for this phenomenon under bidirectional power flows, i.e.; rectifier mode and inverter mode, and, furthermore, seeks to propose effective solutions. A detailed analysis of instantaneous current variations under different conditions was conducted. An enhanced predictive current control strategy with improved switching patterns was then proposed. An experimental platform was built based on a commercial converter produced by Danfoss, and moreover, relative experiments were carried out, confirming the superiority of the proposed scheme.
KW - Bidirectional power flow
KW - Cost function minimization
KW - Improved switching pattern
KW - Predictive control
KW - Three-phase grid-tied converters
UR - http://www.scopus.com/inward/record.url?scp=84956683860&partnerID=8YFLogxK
U2 - 10.3390/en9010041
DO - 10.3390/en9010041
M3 - Journal article
AN - SCOPUS:84956683860
SN - 1996-1073
VL - 9
JO - Energies
JF - Energies
IS - 1
M1 - 41
ER -