Decentralized Power Sharing Control for Parallel-Connected Inverters in Islanded Single-Phase Micro-Grids
In this paper, a Lyapunov function based decentralized control scheme is proposed for a single-phase parallel-connected inverters system within islanded micro-grid. With this novel method, a proper voltage regulation (e.g., amplitude and waveform quality) and excellent power and current sharing performance can be well ensured even in the presence of unknown line impedance and unbalanced LC filter parameters. In addition, high reliability and robustness can be guaranteed since no inter-communication among inverters as well as no centralized controller is demanded, which also delivers advantages of scalability and redundancy. The stability of the closed-loop system is ensured by standard Lyapunov method. The designation of the decentralized controller is simple to implement but rather effective. Detailed simulation and hardware-in-the-loop (HIL) experimental results are presented to validate the feasibility of the proposed scheme under different operating conditions.
K. Wang et al., "Decentralized Power Sharing Control for Parallel-Connected Inverters in Islanded Single-Phase Micro-Grids," IEEE Transactions on Smart Grid, Institute of Electrical and Electronics Engineers (IEEE), Jun 2017.
The definitive version is available at https://doi.org/10.1109/TSG.2017.2720683
Electrical and Computer Engineering
National Key R&D Plan of China
National Natural Science Foundation (China)
State Grid Technology Program
Keywords and Phrases
Controllers; Electric impedance; Electric inverters; Electric load management; Electric power system control; Electric power transmission networks; Lyapunov functions; Lyapunov methods; Redundancy; Voltage control; Voltage regulators; Decentralized controller; Islanded micro grids; Load modeling; Parallel inverter; Power sharing; Stability analysis; Decentralized control; Impedance; Inverters; Islanded micro-grid
International Standard Serial Number (ISSN)
Article - Journal
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