A Novel Control Strategy for Grid-Connected Inverter Based on Iterative Calculation of Structural Parameters

Zhenao Sun, Dazhi Wang, Tianqing Yuan, Zairan Liu and Jiahui Yu
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Zhenao Sun: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Dazhi Wang: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Tianqing Yuan: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Zairan Liu: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Jiahui Yu: School of Information Science and Engineering, Northeastern University, Shenyang 110819, China

Energies, 2018, vol. 11, issue 12, 1-16

Abstract: A novel control strategy that is based on iterative calculation of structural parameters is proposed for grid-connected inverter in this paper. The proposed strategy has a good dynamic performance, which makes it particularly suitable for the application of PV grid-connected generation. First, a second-order discretization mathematical model of grid-connected inverter control is established in the dq frame. The corresponding relation between the control signal and the output current is deduced in formulas. Then, the values of structural parameters in the formulas can be obtained through iterative calculation, which can further reduce the amount of calculation. After several iteration cycles, the structural parameters are approximately equal to their actual values and the inverter can be controlled as an open-loop system with its dynamic performance optimized. At last, simulation and experiments are performed. The results show that the static performance of the proposed strategy is as good as that of the classical ones, but its dynamic performance is improved significantly.

Keywords: grid-connected inverter; iterative calculation; structural parameters; dynamic performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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