Effect of Using PLL-Based Grid-Forming Control on Active Power Dynamics Under Various SCR

Rokrok, Ebrahim; Qoria, Taoufik; Bruyère, Antoine; Bart, François; Guillaud, Xavier

doi:10.1109/iecon.2019.8927648

Cited by 22 publications

(18 citation statements)

References 11 publications

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“…The value of has been chosen to be 30 rad/s. This control reveals excellent robustness against grid impedance variations as demonstrated in [91,92]. As highlighted in Fig.…”

Section: E Examplesmentioning

confidence: 61%

“…25a, the control has to generate an angle reference , for to control the active power. Since, the grid voltage angle represents a disturbance for the active power control, a compensation of this disturbance can be included in the control [91]. This control requires that an estimate of the grid angle ̃ is available.…”

Section: Fundamental Considerations On Grid-forming Convertersmentioning

confidence: 99%

“…A possible one is presented in Fig. 26 [91,92] where the controller is an integrator that eliminates the steady state error on the power. The gain modifies the closed loop dynamics.…”

Section: Fundamental Considerations On Grid-forming Convertersmentioning

confidence: 99%

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Fundamentals of power systems modelling in the presence of converter-interfaced generation

Paolone

Gaunt

Guillaud

et al. 2020

Electric Power Systems Research

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147

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This survey paper discusses the fundamentals of power systems modelling in the presence of large amounts of converter-interfaced generation (CIG). By referring to real-life events characterised by anomalous dynamics associated to the presence of CIG, the concepts of narrow versus broad band signals are first recalled along with the limitation of the meaning of apparent power, power factor and reactive power. In this regard, the adequacy of the phasor representation of voltages and currents waveforms is thoroughly discussed. Then, with respect to the central subject of control of power converters, a revised definition of grid-following and grid-forming converters is provided along with a thorough discussion of their associated controls and a comprehensive classification for both classes of converters. Several applications inspired by actual case studies are included in the paper in order to provide realistic application examples.

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“…The value of has been chosen to be 30 rad/s. This control reveals excellent robustness against grid impedance variations as demonstrated in [91,92]. As highlighted in Fig.…”

Section: E Examplesmentioning

confidence: 61%

Section: Fundamental Considerations On Grid-forming Convertersmentioning

confidence: 99%

See 1 more Smart Citation

Fundamentals of power systems modelling in the presence of converter-interfaced generation

Paolone

Gaunt

Guillaud

et al. 2020

Electric Power Systems Research

Self Cite

147

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show abstract

“…Alternatively, it may be used at all times, thus, introducing a permanent grid-following feature to the synchronization control of PSC. Remark 1: A related scheme is presented in [23]. It differs in that the PLL uses its own dq-frame angle, whereas in (17), θ is common for the PC and the PLL.…”

Section: A Modifications Of Psc 1) Pcc-voltage Orientationmentioning

confidence: 99%

A Universal Controller for Grid-Connected Voltage-Source Converters

Harnefors¹,

Kukkola

Routimo

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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Power-synchronization control (PSC) and vector current control (VCC), the latter including cascaded outer loops, are, respectively, considered to be grid-forming and gridfollowing schemes. They have significant structural differences. Despite that, it is here shown that the two schemes can be unified by making a series of minor modifications to PSC. This results in a universal controller, allowing various combinations of the two schemes to be explored. Fundamentally, it allows PSC to be used as guideline for a robust VCC design, permitting stable and well-performing operation irrespective of the grid strength.

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“…11, an active power set-point change of ∆P * = 0.8p.u is applied. The Short Circuit Ratio (SCR) is equal to 3 for this test case (SCR= 1/X pu g [46]). The obtained results show the high fidelity of the proposed linearized models in (20) and (22) compared to the non-linear model.…”

Section: A Active Power Dynamicsmentioning

confidence: 99%

A PLL-Free Grid-Forming Control With Decoupled Functionalities for High-Power Transmission System Applications

et al. 2020

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This paper proposes a grid-forming control strategy with a generic implementation approach to meet the transmission system requirements asking for the massive integration of power electronic devices into the power systems. In this context, several grid-forming controls have been proposed in the literature either with or without a Phase-Locked Loop (PLL). The PLL-based techniques allow decoupling the different control functionalities (i.e. inertia emulation, frequency support, active power setpoint tracking in steady-state) while the PLL-free schemes, which aim to avoid the PLL drawbacks, create a compulsory coupling between the control functionalities. The proposed grid-forming control in this paper is able to decouple the control functionalities without any dedicated PLL, which makes it more advantageous compared to what have been already proposed in the literature. Since the power converters are exposed to the small and large grid events, the presented control has been tested in both situations. For the small grid events, a simplified small-signal model is developed to assess the active power and frequency dynamics. In case of large grid events, a current limitation algorithm is included to the control in order to protect the power converter. To deal with the transient stability issues linked to the current limitation and enhance the converter performance during the post-fault, a method based on adaptive inertia constant is proposed. To validate the overall approach, time-domain simulations (in Matlab-Simulink) and experimentations are performed. INDEX TERMS Active power regulation, current limitation, fast frequency response, grid-forming control, inertial effect, transient stability. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/ACCESS.2020.3034149, IEEE Access T. Qoria et al.: Preparation of Papers for IEEE TRANSACTIONS and JOURNALS Rc, Lc i gabc v gabc Rg, Lg

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Effect of Using PLL-Based Grid-Forming Control on Active Power Dynamics Under Various SCR

Cited by 22 publications

References 11 publications

Fundamentals of power systems modelling in the presence of converter-interfaced generation

Fundamentals of power systems modelling in the presence of converter-interfaced generation

A Universal Controller for Grid-Connected Voltage-Source Converters

A PLL-Free Grid-Forming Control With Decoupled Functionalities for High-Power Transmission System Applications

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