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CHEN Taomin,RUAN Yubin,LIN Qiongbin,SU Xianjin.Model Predictive Current Control of Three-phase Voltage Source Grid-connected Inverter with Parameter Robustness[J].JOURNAL OF POWER SUPPLY,2019,17(5):87-95
Model Predictive Current Control of Three-phase Voltage Source Grid-connected Inverter with Parameter Robustness
Received:May 17, 2018  Revised:August 20, 2018
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DOI:10.13234/j.issn.2095-2805.2019.5.87
Keywords:model predictive control  inductance observer  parameter robustness  parameter estimation  three-phase voltage source inverter
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CHEN Taomin College of Electrical Engineering and Automation, Fuzhou University, Fuzhou , China;Fuzhou University-Kehua Hengsheng Power Electronics Technology Research Center, Fuzhou , China
RUAN Yubin College of Electrical Engineering and Automation, Fuzhou University, Fuzhou , China;Fuzhou University-Kehua Hengsheng Power Electronics Technology Research Center, Fuzhou , China
LIN Qiongbin College of Electrical Engineering and Automation, Fuzhou University, Fuzhou , China;Fuzhou University-Kehua Hengsheng Power Electronics Technology Research Center, Fuzhou , China qiongbinlin@fzu.edu.cn
SU Xianjin Fuzhou University-Kehua Hengsheng Power Electronics Technology Research Center, Fuzhou , China
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Abstract:
      The traditional model predictive current control(MPCC) heavily relies on the accuracy of mathematical mo-dels. However, there exists parameter mismatch due to modeling errors. An improved MPCC algorithm with parameter robustness is proposed to solve the problem of the controller's poor robustness due to parameter mismatch. Through the analysis of the operating principle of MPCC, the influences of induction mismatch on the controller are discussed. In addition, an inductance observer with division of observing area is established based on the actual and predictive current variations, thus ensuring the controller's strong robustness. Simulations and experiments were conducted on a two-level three-phase voltage source grid-connected inverter system. In the case of parameter mismatch, the controller accurately tracked the actual inductance value and corrected the model by means of the inductance observer. Therefore, the total harmonic distortion of grid-connected current was effectively reduced. Simulation and experimental results verified the feasibility and effectiveness of the proposed algorithm.
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