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Abstract
Synchronization is a crucial aspect in grid-tied systems, including single-phase photovoltaic inverters, and it can affect the overall performance of the system. Among prior-art synchronization schemes, the Multi Harmonic Decoupling Cell Phase-Locked Loop (MHDC-PLL) presents a fast response under grid disturbances and high accuracy under harmonic distortions. However, major drawbacks of the MHDC-PLL include increased complexity and inaccurate response under non-nominal frequencies, which may occur in practical applications. Thus, this paper proposes strategies to address these issues. At first, a novel re-formulation of an equivalent decoupling cell is proposed for reducing the implementation complexity, and then a frequency adaptive quadrature signal generator for the MHDC-PLL is proposed to enable an accurate response even under non-nominal frequencies. Simulation and experimental results are provided, which show that the proposed synchronization (i.e., the frequency adaptive MHDC-PLL) can achieve a fast and accurate response under any grid disturbance and/or severe harmonic conditions.
Original language | English |
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Journal | IEEE Transactions on Power Electronics |
Volume | 32 |
Issue number | 4 |
Pages (from-to) | 2784-2793 |
Number of pages | 10 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Apr 2017 |
Keywords
- Phase locked loop (PLL)
- Synchronization
- Harmonics
- Grid disturbances
- Single-phase inverters
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Dive into the research topics of 'A Synchronization Scheme for Single-Phase Grid-Tied Inverters under Harmonic Distortion and Grid Disturbances'. Together they form a unique fingerprint.Projects
- 1 Finished
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PV2GRID: A Next-Generation Grid Side Converter with Advanced Control and Power Quality Capabilities
Blaabjerg, F., Yang, Y. & Sangwongwanich, A.
01/01/2015 → 30/09/2017
Project: Research