Passivity-Oriented Discrete-Time Voltage Controller Design for Grid-Forming Inverters

Yu, Hui; Awal, MA; Tu, Hao; Du, Yuhua; Lukic, Srdjan; Husain, Iqbal

doi:10.1109/ecce.2019.8912988

Cited by 25 publications

(12 citation statements)

References 18 publications

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“…Only a few attempts to improve the impedance passivity of voltage-controlled VSCs can be found in [47], [48]. A passivity-oriented voltage control scheme is reported in [47].…”

Section: Introductionmentioning

confidence: 99%

“…Only a few attempts to improve the impedance passivity of voltage-controlled VSCs can be found in [47], [48]. A passivity-oriented voltage control scheme is reported in [47]. Yet, the modeling and controller design are based on the discrete-domain model, by which it is difficult to reveal the explicit relationship between the passivity and the voltage control.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Passivity-Based Analysis and Design of Linear Voltage Controllers For Voltage-Source Converters

Liao

Wang

Blaabjerg

2020

IEEE Open J. Ind. Electron. Soc.

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This paper presents a systematic evaluation on the impedance passivity of voltage-controlled voltage-source converters. The commonly used single-and dual-loop control structures with different linear controllers are compared extensively, considering the effect of the time delay involved in the control loop. A virtual impedance control, co-designed with different voltage control schemes, is then proposed to eliminate the negative output resistance till half of the sampling frequency, which improves the system stability for grid-forming converters in grid-connected applications. Both frequency-domain analysis and experimental results validate the theoretical findings.

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“…Only a few attempts to improve the impedance passivity of voltage-controlled VSCs can be found in [47], [48]. A passivity-oriented voltage control scheme is reported in [47].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Passivity-Based Analysis and Design of Linear Voltage Controllers For Voltage-Source Converters

Liao

Wang

Blaabjerg

2020

IEEE Open J. Ind. Electron. Soc.

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“…The series RL impedance is commonly synthesized by grid emulators [33]. The inner and outer virtual impedance (VI) control are typical impedance-emulation schemes, as shown in Fig.…”

Section: B Synthesis Of Grid Impedancementioning

confidence: 99%

Testing Requirements and Control Strategies of Next-Generation Grid Emulator: A Review

Ponnaganti

Zhao

et al. 2022

2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)

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The power-electronic-based grid emulator has been widely used for grid-code compliance testing of wind turbines (WTs). To accommodate the increasing voltage and power levels of WTs, the modular multilevel converter (MMC) emerges as a promising approach for the future grid emulator. This paper provides an overview of testing requirements and control strategies for the MMC-based grid emulator. Specifications, challenges and solutions to implement expected control functionalities of the MMCbased grid emulator are discussed according to testing requirements of WTs. Emerging testing functionalities and future trends of grid emulators conclude this paper.

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“…Third, cascaded control loops are difficult to design and the analysis of large networks become more challenging with multiple layers of cascaded control loops. Digital controller implementation delay and interaction of higher-order filters such as LCL filters with the rest of the network may lead to harmonic resonance instabilities in the inner current and voltage control loops (Awal et al, 2019a,b;Yu et al, 2019). As an alternative to droop control, a class of non-linear time-domain controllers have been proposed, where power electronics converters are operated to emulate the dynamic response of non-linear oscillators.…”

Section: Introductionmentioning

confidence: 99%

Droop and Oscillator Based Grid-Forming Converter Controls: A Comparative Performance Analysis

Awal

Lukic

et al. 2020

Front. Energy Res.

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Two distinct approaches, one droop-based phasor-domain modeled and the other non-linear oscillator-based time-domain modeled, have emerged for the analysis and control of power electronic converters at the system interface layer where these converters are integrating distributed energy resources (DERs). While the droop-type controllers are based on distinct timescale separation of control loops, purposefully slowing down the response of the DERs, the oscillator-based controllers deliver fast dynamic response with accurate power sharing capability as well as stability guarantee. In this paper, we analyze both the droop-and oscillator-type converters in the context of grid forming converters with respect to steady state terminal response, transient stability, and harmonic compensation in converter output current or in network voltage. Simulation and experimental results are provided to demonstrate the easier implementation of oscillator-based controls that can also achieve supplementary control objectives pertinent to power quality.

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Passivity-Oriented Discrete-Time Voltage Controller Design for Grid-Forming Inverters

Cited by 25 publications

References 18 publications

Passivity-Based Analysis and Design of Linear Voltage Controllers For Voltage-Source Converters

Passivity-Based Analysis and Design of Linear Voltage Controllers For Voltage-Source Converters

Testing Requirements and Control Strategies of Next-Generation Grid Emulator: A Review

Droop and Oscillator Based Grid-Forming Converter Controls: A Comparative Performance Analysis

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