Open AccessCompound Control Scheme Based on Repetitive Controller And Proportional Controller In Building Distribution Grid
Author(s) -
Shanshou Li,
Yueyue Wu,
XU Chao-Zan
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1639/1/012025
Subject(s) - control theory (sociology) , repetitive control , controller (irrigation) , open loop controller , harmonics , grid , voltage , computer science , control system , engineering , control engineering , control (management) , mathematics , closed loop , agronomy , geometry , artificial intelligence , electrical engineering , biology
This paper proposes a compound control scheme of three-Phase four-Leg (3P4L) SVG based on the combination of repetitive controller and proportional controller, for the purpose of independently compensating the zero-sequence current under the conditions of load imbalance. To begin with, the overall control scheme of the system is given, in which the repetitive controller and P-controller are connected in parallel. Then, we concluded the recommended scheme is completely equivalent to the series scheme, hence the proportional controller and the repetitive controller can be designed independently. After that, a step-by-step design example of open-loop proportional controller and closed-loop repetitive controller are described. Moreover, the grid voltage feed-forward block is adopted for suppressing the influence of harmonics voltage in grid. Last but not least, Simulation experiments are carried out, and the results demonstrate that the proposed scheme can effectively improve the dynamic performance and stability of 3P4L-SVG under the conditions of load imbalance or grid voltage imbalance.