A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics

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2 Citationer (Scopus)

Resumé

With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system.
OriginalsprogEngelsk
TitelProceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC)
Antal sider7
ForlagIEEE Press
Publikationsdatodec. 2018
Sider1-7
ISBN (Trykt)978-1-5386-8258-6
ISBN (Elektronisk)978-1-5386-8257-9
DOI
StatusUdgivet - dec. 2018
BegivenhedThe 4th IEEE Southern Power Electronics Conference, SPEC 2018 - Nanyang Technological University, Singapore
Varighed: 10 dec. 201813 dec. 2018

Konference

KonferenceThe 4th IEEE Southern Power Electronics Conference, SPEC 2018
LokationNanyang Technological University
LandSingapore
Periode10/12/201813/12/2018

Fingerprint

Power converters
Electric potential
Phase locked loops
Controllers
Power electronics
Reactive power
Voltage control
Transfer functions
Dynamical systems

Citer dette

Peng, Q., Fang, J., Yang, Y., & Blaabjerg, F. (2018). A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. I Proceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC) (s. 1-7). IEEE Press. https://doi.org/10.1109/SPEC.2018.8635858
Peng, Qiao ; Fang, Jingyang ; Yang, Yongheng ; Blaabjerg, Frede. / A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. Proceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC). IEEE Press, 2018. s. 1-7
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title = "A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics",
abstract = "With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system.",
keywords = "grid-connected power converter, modeling, internal voltage, external characteristics, power angle stability",
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Peng, Q, Fang, J, Yang, Y & Blaabjerg, F 2018, A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. i Proceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC). IEEE Press, s. 1-7, Singapore, 10/12/2018. https://doi.org/10.1109/SPEC.2018.8635858

A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. / Peng, Qiao; Fang, Jingyang; Yang, Yongheng; Blaabjerg, Frede.

Proceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC). IEEE Press, 2018. s. 1-7.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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AU - Yang, Yongheng

AU - Blaabjerg, Frede

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N2 - With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system.

AB - With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system.

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KW - power angle stability

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Peng Q, Fang J, Yang Y, Blaabjerg F. A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. I Proceedings of the 2018 IEEE 4th Southern Power Electronics Conference (SPEC). IEEE Press. 2018. s. 1-7 https://doi.org/10.1109/SPEC.2018.8635858