Abstract
In this paper, a small signal model based on droop controller is established for the self-synchronous voltage source parallel system. The influence of droop coefficient on system stability is analysed, and the constraint conditions of droop coefficient are given. Based on the analysis of the parallel system of self-synchronous voltage source inverter, a multi-machines parallel control scheme of self-synchronous voltage source inverter is formulated. The model and test platform are built to carry out the parallel simulation and experimental verification of distributed line impedance parameters. Simulation and experimental results show that the proposed control strategy can achieve good dynamic and steady-state power sharing.
Highlights
For the parallel system of distributed inverters, the connection points are randomly distributed in the distribution network, and the existing technology can not solve the active power and reactive power decoupling problem of voltage source inverter caused by the equivalent parameters of line impedance
The output impedance characteristics and line impedance characteristics of the inverter are not taken into account in this scheme, which is easy to cause circulating current in distributed multi-machines parallel system
The small signal model of the system loop based on droop controller is established, and the influence of droop coefficient on the system stability is analysed
Summary
For the parallel system of distributed inverters, the connection points are randomly distributed in the distribution network, and the existing technology can not solve the active power and reactive power decoupling problem of voltage source inverter caused by the equivalent parameters of line impedance. With the increasing capacity of microgrid, it is urgent to solve the problem of distributed multi-machines parallel connection of self-synchronous voltage source inverter (SVI) to provide voltage and frequency support for distribution network. Based on the research of reference [7,8], the inner loop of current control, secondary voltage and frequency regulation control are introduced, and the distributed parallel networking technology is proposed to realize the stable operation of distributed multi-machines parallel system
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
