Simple synchronisation technique for three‐phase grid‐connected distributed generation systems

Autor: Wei-Yang Wu, Xiaoqiang Guo
Rok vydání: 2013
Předmět:
Zdroj: IET Renewable Power Generation. 7:55-62
ISSN: 1752-1424
1752-1416
DOI: 10.1049/iet-rpg.2011.0243
Popis: Grid synchronisation is crucial for integration of renewable energy sources and distributed generation systems into the grid. Accurate and fast estimation of the fundamental positive sequence component is a necessity for synchronisation of three-phase distributed generation systems with the grid. In this study, a simple synchronisation technique based on the real-complex-coefficient filters is proposed. It has a very simple structure, and can directly estimate the fundamental positive and negative sequences under the distorted, unbalanced and offset conditions with no need of a phase-locked loop. Furthermore, the dc offset can also be extracted precisely. For optimising the steady-state and dynamic performance, a parameter tuning guidance is provided from the eigenvalue analysis point of view. In addition, a simple auxiliary unit is presented to remain its frequency-adaptive feature. Finally, experimental results based on a 32-bit fixed-point TMS320F2812 DSP verify the effectiveness of the proposed synchronisation method.
Databáze: OpenAIRE
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