Affiliations: School of Automation and Information Engineering, Xi’an University of Technology, Xi’an, China
Correspondence:
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Corresponding author. Chenghu Ke, School of Automation and Information Engineering, Xi’an University of Technology, 710048, Xi’an, China. E-mail: [email protected].
Abstract: Recent studies show that power electronic system performance can be improved by combining with communication technologies, however, time-delay impact that is introduced by network could cause performance degradation. As for networked control inverters, such delay results in an increase in the THD of the output. To solve the time-delay impact, in this paper, we propose a wireless network control inverter architecture. It transmits the information of AC microgrid by Zigbee and a compound control method (internal model control and quasi-PR control) of networked control inverter is proposed. The architecture enables remote control of the inverter and wireless parallel connection, the method can either reduce the THD increase and the circumfluence of wireless parallel inverters. The proposed method is concretely applied in networked control system of quasi-PR controlled AC microgrid in grid mode. The simulation and experimental results are presented to prove the proposed control on several operating condition, which provide a competive performance.
Keywords: Network-based control, transmission delay, compound control method, AC microgrid
