Abstract
In the algorithm of instantaneous reactive power theory (IP-IQ), the rotation angle of the synchronous rotating coordinate system is an important parameter that has to be supervised in real time. In this paper, we propose an improved software phase-lock-loop (SPLL) that accurately lock of the rotation angle of the fundamental positive sequence component in the unbalance grid voltage by establishing a virtual symmetrical three-phase system and then calculate the compensation current components. In this paper, we introduce a new structure of the traditional Distribution Static Synchronous Compensator (DSTATCOM) main circuit, which considered as a combination of the conventional DSTATCOM topology with a capacitor C\(_f\) in series and the surfacing inductance. However, unlike the traditional DSTATCOM DC-Link that requires a fairly high DC voltage along with the high switching losses, the series capacitor reduces DC-Link voltage significantly, in the meanwhile compensates the reactive power required by the load without compromising DSTATCOM performance. Finally, a simulation study has been carried out by the author using Simulink to verify the proposed topology.
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Acknowledgement
This work is supported by National Program on Key Basic Research Project under grant 2013CB035906 and The Fundamental Research Funds for the Central Universities under Grant DUT16QY13.
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Wang, X., Zhu, X., Lai, X., Lin, C., Li, S. (2018). Application of Improved Software Phase-Locked-Loop in DSTATCOM. In: Barolli, L., Enokido, T. (eds) Innovative Mobile and Internet Services in Ubiquitous Computing . IMIS 2017. Advances in Intelligent Systems and Computing, vol 612. Springer, Cham. https://doi.org/10.1007/978-3-319-61542-4_33
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DOI: https://doi.org/10.1007/978-3-319-61542-4_33
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