Abstract

A novel Lyapunov function based decentralized control method is proposed for three-phase parallel connected inverters system within islanded micro-grid. A proper voltage regulation and excellent power sharing performance can be well ensured even under unknown line impedance and unbalanced LC filter parameters. Moreover, high reliability and robustness can be guaranteed since no inter-communication among inverters as well as no centralized controller is demanded, which also derives the advantages of scalability and redundancy. The stability of the entire system is ensured by standard Lyapunov method. The implementation is simple and effectiveness without multi-loop controller. The analysis is confirmed via some simulation and hardware-in-the-loop (HIL) experimental results.

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