Open AccessInverter Control Strategy Based on Improved Deadbeat Control and QPR Compound
Author(s) -
Wenwen Wang,
Xianbo Sun,
Yuhan Wu,
Pengfei Yang
Publication year - 2021
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 - 10.1088/1742-6596/1920/1/012038
Subject(s) - control theory (sociology) , inner loop , total harmonic distortion , controller (irrigation) , grid , inverter , computer science , pulse width modulation , voltage , fuzzy control system , control (management) , fuzzy logic , engineering , mathematics , electrical engineering , artificial intelligence , agronomy , biology , geometry
In the process of photovoltaic power generation, it is particularly important to choose a suitable inverter control strategy. Aiming at problems such as the poor dynamic response of the traditional controller in the three-phase LCL grid-connected inverter, the current harmonic disturbance caused by the grid voltage distortion and the inability to achieve the optimal tracking of the AC quantity, this paper presented a method to control voltage by fuzzy PI, control current by discrete QPR and improved DBC. In the voltage outer loop, the fuzzy control principle was used to adjust the P and I parameters in real time, and its output was used as the reference value for the current inner loop. In the current inner loop, the repeated control improved deadbeat and discretized form of QPR were used for compound control. The simulation results show that the control strategy greatly improves the distortion of the grid-connected current, which can optimally track the AC volume, and makes the entire system have good stability and dynamic response capabilities.