Unified reference controller for flexible primary control and inertia sharing in multi‐terminal voltage source converter‐HVDC grids

Rouzbehi, Kumars; Zhang, Weiyi; Candela, José Ignacio; Luna, Álvaro; Rodríguez, Pedro

doi:10.1049/iet-gtd.2016.0665

Cited by 55 publications

(32 citation statements)

References 29 publications

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“…Additionally, in (12), the same power reference has to be used for both terminals: P * ∆1 = −P * ∆2 = P * ∆ , and the dc-voltage controllers have the same value (K dc p ). Under these considerations, the power balance equation in (23) becomes:…”

Section: Dc-voltage Droop Designmentioning

confidence: 99%

“…Recently, some authors have proposed coordinated control strategies to provide frequency support and/or inertia emulation via coordinated dc-voltage regulation [11,21,22]. In particular, Rouzbehi et al [23] introduced the concept of inertia sharing for ac systems coupled by MTDC links. The control scheme provided a virtual coupling between ac networks, increasing the equivalent system inertia.…”

Section: Introductionmentioning

confidence: 99%

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Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

Rodríguez-Cabero

Roldán-Pérez

Prodanović

et al. 2020

IEEE Trans. Power Electron.

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This paper presents a control approach for HVDC interconnections that provides damping of frequency oscillations in asynchronous ac grids by introducing a virtual friction for coupling their inertial dynamics. The HVDC interconnection is modelled by using the concept of common and differential power flow, allowing for independent control of the dc voltage and the net power transfer between HVDC terminals, respectively. The proposed controller introduces a damping effect in the differential power flow which is equivalent to a mechanical friction between the generators connected to the ac grids at the two terminals. This virtual friction-based damping can effectively attenuate poorly damped frequency oscillations that can be observed where the HVDC interconnection is interfaced to either of the ac grids without relying on fast communication between the converter terminals. The impact of the proposed control technique on the stability and damping of two interconnected power systems is first analysed by using a simplified model. Then, the sensitivity to the frequency and damping of the oscillation modes appearing in the ac grid frequencies, as well as the effect of the dc line resistance on the oscillation damping are evaluated. Finally, the control system performance is experimentally validated on a scaled laboratory setup.

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Section: Dc-voltage Droop Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

Rodríguez-Cabero

Roldán-Pérez

Prodanović

et al. 2020

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…is regulated using voltage droop control [24]. Through the investigation of bi-layer control architecture deployed within multi-input multi-output (MIMO) voltage source converter, it can be realized that the operation of SST-VSC becomes a bit complex [25]. This complex control architecture has many variables which need to be controlled precisely using PI controllers [26].…”

Section: Control Layout Of Sst-voltage Source Converetermentioning

confidence: 99%

Design of Three Phase Solid State Transformer Deployed within Multi-Stage Power Switching Converters

Tahir¹,

Abbas²,

Glăvan³

et al. 2019

Preprint

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This paper presents a symmetrical topology for the design of solid-state transformer, made up of power switching converters, to replace conventional bulky transformers. The proposed circuitry not only reduces the overall size but also provides power flow control with the ability to be interfaced with renewable energy resources (RESs) to fulfill the future grid requirements at consumer end. Solid state transformer provides bidirectional power flow with variable voltage and frequency operation and has the ability to maintain unity power factor, and current total harmonic distortion (THD) for any type of load within defined limits of IEEE standard. Solid State Transformer offers much smaller size as compared to that of the conventional iron core transformer. MATLAB/Simulink platform is adopted to test the validity of the proposed circuit for different scenarios by providing the simulation results evaluated at 25 kHz switching frequency.

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“…DC link voltage V DC, mes was regulated using the voltage droop control [24]. Through the investigation of the bi-layer control architecture deployed within a multi-input multi-output (MIMO) voltage source converter, it can be realized that the operation of SST-VSC becomes a bit complex [25]. This complex control architecture has many variables, which need to be controlled precisely using PI controllers [26].…”

Section: Control Layout Of the Sst-voltage Source Converetermentioning

confidence: 99%

Design of Three Phase Solid State Transformer Deployed within Multi-Stage Power Switching Converters

et al. 2019

View full text Add to dashboard Cite

This paper presents a symmetrical topology for the design of solid-state transformer; made up of power switching converters; to replace conventional bulky transformers. The proposed circuitry not only reduces the overall size but also provides power flow control with the ability to be interfaced with renewable energy resources (RESs) to fulfill the future grid requirements at consumer end. The proposed solid-state transformer provides bidirectional power flow with variable voltage and frequency operation and has the ability to maintain unity power factor; and total harmonic distortion (THD) of current for any type of load within defined limits of Institute of Electrical and Electronics Engineers (IEEE) standard. Solid state transformer offers much smaller size compared to the conventional iron core transformer. MATLAB/Simulink platform is adopted to test the validity of the proposed circuit for different scenarios by providing the simulation results evaluated at 25 kHz switching frequency.

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Unified reference controller for flexible primary control and inertia sharing in multi‐terminal voltage source converter‐HVDC grids

Cited by 55 publications

References 29 publications

Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

Design of Three Phase Solid State Transformer Deployed within Multi-Stage Power Switching Converters

Design of Three Phase Solid State Transformer Deployed within Multi-Stage Power Switching Converters

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