Current Reference Generation based on Next Generation Grid Code Requirements of Grid-Tied Converters during Asymmetrical Faults

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Resumé

Increased penetration of converter-based power generation has enforced system operators to require ancillary services from distributed generation in order to support the grid and improve the power system stability and reliability. Recent and next generation of grid codes require asymmetrical current provision during unbalanced faults for optimal voltage support.
To address this, based on the highly used flexible positive and negative-sequence control method for current reference generation, this paper presents a general current reference strategy for asymmetrical fault control where a direct and explicit method is proposed to calculate power references and controller gains while simultaneously complying with converter current limitation and fulfilling the next generation of grid code requirements. The proposed method is tested for three distinct asymmetrical grid faults considering the requirements for dynamic voltage support of the recently revised German grid code as well as the next-generation grid codes. It is shown that the proposed method can improve the fault ride-through performance during asymmetrical faults compared to conventional solutions and comply with modern grid code requirements in a general and flexible manner.
OriginalsprogEngelsk
TidsskriftIEEE Journal of Emerging and Selected Topics in Power Electronics
Antal sider14
ISSN2168-6777
DOI
StatusE-pub ahead of print - jul. 2019

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Distributed power generation
Electric potential
System stability
Power generation
Controllers

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title = "Current Reference Generation based on Next Generation Grid Code Requirements of Grid-Tied Converters during Asymmetrical Faults",
abstract = "Increased penetration of converter-based power generation has enforced system operators to require ancillary services from distributed generation in order to support the grid and improve the power system stability and reliability. Recent and next generation of grid codes require asymmetrical current provision during unbalanced faults for optimal voltage support. To address this, based on the highly used flexible positive and negative-sequence control method for current reference generation, this paper presents a general current reference strategy for asymmetrical fault control where a direct and explicit method is proposed to calculate power references and controller gains while simultaneously complying with converter current limitation and fulfilling the next generation of grid code requirements. The proposed method is tested for three distinct asymmetrical grid faults considering the requirements for dynamic voltage support of the recently revised German grid code as well as the next-generation grid codes. It is shown that the proposed method can improve the fault ride-through performance during asymmetrical faults compared to conventional solutions and comply with modern grid code requirements in a general and flexible manner.",
keywords = "Grid-Connection, Voltage-Source Converter, Asymmetrical Grid Fault, Current Reference Generation, Fault Ride-Through, Dynamic Voltage Support",
author = "Taul, {Mads Graungaard} and Xiongfei Wang and Pooya Davari and Frede Blaabjerg",
year = "2019",
month = "7",
doi = "10.1109/JESTPE.2019.2931726",
language = "English",
journal = "I E E E Journal of Emerging and Selected Topics in Power Electronics",
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T1 - Current Reference Generation based on Next Generation Grid Code Requirements of Grid-Tied Converters during Asymmetrical Faults

AU - Taul, Mads Graungaard

AU - Wang, Xiongfei

AU - Davari, Pooya

AU - Blaabjerg, Frede

PY - 2019/7

Y1 - 2019/7

N2 - Increased penetration of converter-based power generation has enforced system operators to require ancillary services from distributed generation in order to support the grid and improve the power system stability and reliability. Recent and next generation of grid codes require asymmetrical current provision during unbalanced faults for optimal voltage support. To address this, based on the highly used flexible positive and negative-sequence control method for current reference generation, this paper presents a general current reference strategy for asymmetrical fault control where a direct and explicit method is proposed to calculate power references and controller gains while simultaneously complying with converter current limitation and fulfilling the next generation of grid code requirements. The proposed method is tested for three distinct asymmetrical grid faults considering the requirements for dynamic voltage support of the recently revised German grid code as well as the next-generation grid codes. It is shown that the proposed method can improve the fault ride-through performance during asymmetrical faults compared to conventional solutions and comply with modern grid code requirements in a general and flexible manner.

AB - Increased penetration of converter-based power generation has enforced system operators to require ancillary services from distributed generation in order to support the grid and improve the power system stability and reliability. Recent and next generation of grid codes require asymmetrical current provision during unbalanced faults for optimal voltage support. To address this, based on the highly used flexible positive and negative-sequence control method for current reference generation, this paper presents a general current reference strategy for asymmetrical fault control where a direct and explicit method is proposed to calculate power references and controller gains while simultaneously complying with converter current limitation and fulfilling the next generation of grid code requirements. The proposed method is tested for three distinct asymmetrical grid faults considering the requirements for dynamic voltage support of the recently revised German grid code as well as the next-generation grid codes. It is shown that the proposed method can improve the fault ride-through performance during asymmetrical faults compared to conventional solutions and comply with modern grid code requirements in a general and flexible manner.

KW - Grid-Connection

KW - Voltage-Source Converter

KW - Asymmetrical Grid Fault

KW - Current Reference Generation

KW - Fault Ride-Through

KW - Dynamic Voltage Support

U2 - 10.1109/JESTPE.2019.2931726

DO - 10.1109/JESTPE.2019.2931726

M3 - Journal article

JO - I E E E Journal of Emerging and Selected Topics in Power Electronics

JF - I E E E Journal of Emerging and Selected Topics in Power Electronics

SN - 2168-6777

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