State-Space Modeling of Grid-Connected Power Converters Considering Power-Internal Voltage Characteristics

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Abstrakt

To analyze the stability of power electronics-dominated systems, this paper develops a state-space model of power converters including the DC-link voltage control, where the power-internal voltage (PIV) characteristics of the power converters are considered. The PIV concept comes from the inertia characteristic and swing equation of synchronous generators. It reflects the relationship between the output power and converter internal voltage, the converter response to grid disturbances, and finally, the impact of power converters on the grid stability. In the proposed model, the inputs are the outer controller references and the converter output power, i.e., the power at the point of common coupling (PCC). The output of the model is the internal voltage that determines the grid power distribution, including the power at the PCC. The power will be fed back to the converters as an input, and thinks the closed-loop model of the converter-based system is obtained. Importantly, the parameters of the proposed model are independent of the power grid, but related to the converter operation points and parameters. This makes the model more general and can be employed to analyze multiple converter-based systems. Furthermore, a case study is conducted in this paper to demonstrate the model and the stability analysis.
OriginalsprogEngelsk
TitelProceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
Antal sider7
ForlagIEEE Press
Publikationsdatomaj 2019
Sider3047-3053
Artikelnummer8797023
ISBN (Elektronisk)978-89-5708-313-0
StatusUdgivet - maj 2019
Begivenhed2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) - Busan, Sydkorea
Varighed: 27 maj 201930 maj 2019

Konference

Konference2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
LandSydkorea
ByBusan
Periode27/05/201930/05/2019
NavnInternational Conference on Power Electronics
ISSN2150-6078

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  • Citationsformater

    Peng, Q., Yang, Y., & Blaabjerg, F. (2019). State-Space Modeling of Grid-Connected Power Converters Considering Power-Internal Voltage Characteristics. I Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) (s. 3047-3053). [8797023] IEEE Press. International Conference on Power Electronics https://ieeexplore.ieee.org/document/8797023