Open AccessHigh‐performance unified power quality conditioner using command generator tracker‐based direct adaptive control strategy
Author(s) -
Patjoshi Rajesh Kumar,
Mahapatra Kamalakanta
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.2015.0439
Subject(s) - control theory (sociology) , pid controller , voltage sag , harmonics , robustness (evolution) , computer science , voltage reference , voltage , engineering , control engineering , power quality , control (management) , electrical engineering , temperature control , biochemistry , chemistry , artificial intelligence , gene
This study proposes a command generator tracker‐based direct adaptive control technique (CGT‐DAC) in a three‐phase three‐wire unified power quality conditioner (UPQC). This proposed CGT‐DAC improves the PQ issues such as current and voltage harmonics, sag/swell and voltage unbalance in the power system distribution network. CGT is a model reference control law for a linear time‐invariant system with known coefficients and is formulated for the generation of reference signals for both shunt and series inverter. Furthermore, CGT can adaptively regulate the DC‐link capacitor voltage without utilising additional controller. Moreover, DAC is designed to track a linear reference model to reduce the tracking error between model reference output and measured signal to be controlled. Therefore, the proposed CGT‐DAC approach provides more robustness, flexibility and adaptability in all operating conditions of the power system over a conventional proportional–integral (PI) controller. This proposed control strategy of UPQC is validated through MATLAB/SIMULINK followed by the experimental system of real‐time‐hardware‐in the loop‐based OPAL‐RT system and adequate results are reported after a comparative assessment with the conventional PI‐controller.