Dual-Frequency Bands Grid Impedance Emulator for Stability Test of Grid-Connected Converters

Wang, Jiashi; Ma, Ke; Tang, Weiyu; Cai, Xu; Zheng, Luhai; Li, Xinqiang; Wang, Aiguo

doi:10.1109/tpel.2022.3173958

Cited by 10 publications

(9 citation statements)

References 40 publications

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“…Similarly, the virtual impedance (VI) and single-loop voltage control (VC) are used for synthesizing impedance [43], [63], which can also provide damping to mitigate the -R within 1/(4Td). However, as emulated impedance increases, -R within [1/(4Td), fs/2] becomes larger, which exacerbates the risk of high-frequency instability [64].…”

Section: Interactions Between Grid Emulator and Dut Under Steady-stat...mentioning

confidence: 99%

“…Conversely, for the L-filtered inverter, the -R within [1/(4Td), fs/2] is not mitigated [61]. Additionally, the -R also appears within [1/(4Td), fs/2] for the voltage-magnitude emulation by the dual-loop voltage control [60] and the impedance emulation [63]. Thus, reducing time delay is a direct method to mitigate -R. centralized control and the distributed control [12], [49], [53], [54].…”

Section: Interactions Between Grid Emulator and Dut Under Steady-stat...mentioning

confidence: 99%

“…However, a grid emulator based on conventional VC and VI control commonly exhibits the inaccuracy of low-frequency impedance emulation [10], [63], [64]. Fig.…”

Section: B Emerging Trends 1) Reproduction Of Low-frequency Oscillati...mentioning

confidence: 99%

“…To address this issue, the virtual admittance (VA) control and current control (CC) is introduced in [63], [64]. (23) where Rv and Lv are the virtual resistance and inductance.…”

Section: B Emerging Trends 1) Reproduction Of Low-frequency Oscillati...mentioning

confidence: 99%

See 3 more Smart Citations

Medium-Voltage Megawatt Power-Electronic-Based Grid Emulators: Testing Capability Requirements and Dynamics Challenges—A Review

Zhao

Wang

et al. 2024

IEEE J. Emerg. Sel. Topics Power Electron.

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Power-electronic-based grid emulators are emerging as a promising way to test the grid-code compliance of renewable energy resources. Yet, the ever-increasing power and voltage levels of device under test pose new requirements and challenges to power-electronic-based grid emulators. This paper first gives an overview of testing capability requirements based on the recent grid codes and standards, then discusses the resulted dynamic interactions and solutions for power-electronic-based grid emulators. Perspectives on the open issues and emerging trends of grid emulators are finally shared.

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Section: Interactions Between Grid Emulator and Dut Under Steady-stat...mentioning

confidence: 99%

Section: Interactions Between Grid Emulator and Dut Under Steady-stat...mentioning

confidence: 99%

“…However, a grid emulator based on conventional VC and VI control commonly exhibits the inaccuracy of low-frequency impedance emulation [10], [63], [64]. Fig.…”

Section: B Emerging Trends 1) Reproduction Of Low-frequency Oscillati...mentioning

confidence: 99%

“…To address this issue, the virtual admittance (VA) control and current control (CC) is introduced in [63], [64]. (23) where Rv and Lv are the virtual resistance and inductance.…”

Section: B Emerging Trends 1) Reproduction Of Low-frequency Oscillati...mentioning

confidence: 99%

See 2 more Smart Citations

Medium-Voltage Megawatt Power-Electronic-Based Grid Emulators: Testing Capability Requirements and Dynamics Challenges—A Review

Zhao

Wang

et al. 2024

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…The setup can be flexibly reconfigured with high safety and compatibility, and is thereby well eligible for the aggregated emulation as well as other types of stability validation. The high control bandwidth of the system also enables the emulation to be greatly improved to meet the requirement in fast dynamics like [10].…”

Section: A Test Setup For the Aggregated Emulation And Stability Vali...mentioning

confidence: 99%

Aggregated Emulation of Multiple Converters with Heterogeneous Dynamics in Low-Voltage Microgrids – A Clustering Approach

Song

Sahoo

Yang

et al. 2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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The high penetration of renewable generation and the increasing applications of power electronic converters are bringing about stability issues in modern microgrids. Considering multi-dynamic interactions among converters, the system-level modeling and validation of microgrids are of importance, where both the test strategies and hardware implementations are required. In this paper, a clustering method is proposed for stability validation in microgrids based on aggregated emulation of a bus with multi-dynamic converters. The method is demonstrated by real-time simulation results. A reconfigurable test setup is also introduced, which can functionally support the aggregated emulation and also highfidelity validation of system-level stability in microgrids.

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Accurate Stability Analysis of Three-Phase Converter System Connected to Weak Grid under Coordinate System Transformation

Fu,

Han,

Zalhaf

et al. 2024

Electric Power Components and Systems

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Dual-Frequency Bands Grid Impedance Emulator for Stability Test of Grid-Connected Converters

Cited by 10 publications

References 40 publications

Medium-Voltage Megawatt Power-Electronic-Based Grid Emulators: Testing Capability Requirements and Dynamics Challenges—A Review

Medium-Voltage Megawatt Power-Electronic-Based Grid Emulators: Testing Capability Requirements and Dynamics Challenges—A Review

Aggregated Emulation of Multiple Converters with Heterogeneous Dynamics in Low-Voltage Microgrids – A Clustering Approach

Accurate Stability Analysis of Three-Phase Converter System Connected to Weak Grid under Coordinate System Transformation

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