Virtual Synchronous Machine Control of VSC HVDC for Power System Oscillation Damping

Pérez, Javier Roldán; Suul, Jon Are; D’Arco, Salvatore; Rodríguez-Cabero, Alberto; Prodanović, Milan

doi:10.1109/iecon.2018.8591097

Cited by 17 publications

(13 citation statements)

References 24 publications

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“…However, the design of the proposed controller necessitates a tradeoff between the tracking speed of the PLL and the damping capability of the VSM, thus hindering the optimal damping of LFOs. Perez et al [14] investigated two LFO damping topologies namely: the grid-damping and self-damping, which employed the measured grid frequency and the virtual rotor speed of the VSM respectively. It was observed that the grid-damping is a more effective solution.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, in [15], the difference between the measured grid frequency and the virtual rotor speed was synthesized to achieve a virtual inertial power to damp LFOs. However, the stabilizing signals for these topologies [14], [15] were injected on the active power loop, which may lead to torsional oscillations when the prime mover of the VSM is a wind turbine [1]. In [16], a virtual frictional component was proposed to damp LFOs.…”

Section: Introductionmentioning

confidence: 99%

“…However, for RESs with fast response, evaluating the dynamic interaction of the RESs with the network is very crucial in validating the system stability [49], [50]. Also, in [9], [10], [13], [14] the analytical derivations do not provide a holistic insight of the system Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Baruwa

Fazeli

2021

IEEE Trans. Power Syst.

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The low-frequency oscillations (LFOs) inherent in power systems will be impacted by the increasing penetration of renewable energy sources (RESs). This paper investigates the impact of virtual synchronous machine (VSM) based RESs on the LFOs in power systems. A detailed two-machine test-bed has been developed to analyze the LFOs which exists when VSMs replace synchronous generators. The characteristics of the LFO modes and the dominant states have been comprehensively analyzed. Furthermore, this study analyzes the LFO modes which exists in an all-VSM grid. The role of the power system stabilizers in the all-VSM grid has been comprehensively evaluated. The IEEE benchmark two-area four-machine system has been employed to corroborate the results of the small-signal analysis and observe the transient performance. The analysis in this paper have been performed in MATLAB/SIMULINK environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Baruwa

Fazeli

2021

IEEE Trans. Power Syst.

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“…The methods of frequency feedforward of PCC voltage [22][23][24][25] are effective to provide virtual inertia power. The addition of extra virtual inertia could promote the grid-supporting capability.…”

Section: Introductionmentioning

confidence: 99%

Modified virtual inertia control method of VSG strategy with improved transient response and power‐supporting capability

Wang

Liu

Duan

2019

IET Power Electronics

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Virtual synchronous generator (VSG) controlled grid-tied converters could increase power overshoot and oscillation if real power reference disturbance (PRD) occurs. Existing VSG methods can mitigate the power oscillations, but they may reduce the supporting capability of grid contingency. To cope with the issue, a modified virtual inertia control method of VSG strategy is proposed. The proposed modified VSG method introduces two frequencies of point of common coupling into the virtual inertia control. The estimated frequency is used to mitigate the power oscillations and the measured frequency aims to provide extra power supporting. The formulated parameters design principles are given according to the transient characteristics. Stability analysis of power and frequency response is carried out to evaluate the proposed method. Besides, the transient power and frequency response of the PRD case and grid-frequency disturbance (GFD) case are studied. The power overshoot of the proposed modified VSG method decreases by 52.5% under the PRD case and the power support peak increases by 34.3% under the GFD case. Experimental results show that the transient performance of the proposed modified VSG controlled gridtied converters is improved.

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“…Ref. [153] investigated two LFO damping topologies namely: the grid-damping and selfdamping, which employed the measured grid frequency and the virtual rotor speed of the VSM respectively. It was observed that the grid-damping is a more effective solution.…”

Section: ) Large Scale Ress Impacting Damping Torque Of Sgsmentioning

confidence: 99%

Design and Control of Virtual Synchronous Machine Based Energy Systems

Baruwa¹

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Conventionally, the operation and stability of power systems have been governed by the dynamics of large synchronous generators (SGs) which provide the inertial support required to maintain the resilience and stability of the power system. How-ever, the commitment of the UK to drive a zero-carbon economy is accelerating the integration of renewable energy sources (RESs) into the power system. Since the dynamics and operation of RESs diﬀers from SGs, the large-scale integration of RESs will signiﬁcantly impact the control and stability of the power system.This thesis focuses on the design of grid-friendly control algorithms termed virtual synchronous machines (VSMs), which mimic the desirable characteristics of SGs. Although several VSM topologies have been proposed in literature, most of them require further modiﬁcations before they can be integrated into the grid. Hence, a novel VSM algorithm for permanent magnet synchronous generator based wind turbines has been proposed in this thesis.The proposed VSM performs seamlessly in all operating modes and enables maxi-mum power point tracking in grid-connected operation (assuming strong grid), load following power generation in islanded mode and fault ride-through during faults. To ensure optimal performance of the VSM in all operating modes, a comprehensive stability analysis of the VSM was performed in the event of small and large per-turbations. The result of the analysis was used to establish design guidelines and operational limits of the VSM.This thesis further evaluates the impact of VSMs on the power systems low-frequency oscillations (LFOs). A detailed two-machine test-bed was developed to analyze the LFOs which exists when VSMs replace SGs. The characteristics of the LFO modes and the dominant states was comprehensively analyzed. The LFO modes which exists in an all-VSM grid was also analyzed. Further, the role of the power system stabilizers in an all-VSM grid was comprehensively evaluated. An IEEE benchmark two-area four-machine system was employed to validate the results of the small-signal analysis.The analysis and time-domain simulations in this thesis were performed in the MAT-LAB/SIMULINK environment.

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Virtual Synchronous Machine Control of VSC HVDC for Power System Oscillation Damping

Cited by 17 publications

References 24 publications

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Impact of Virtual Synchronous Machines on Low-Frequency Oscillations in Power Systems

Modified virtual inertia control method of VSG strategy with improved transient response and power‐supporting capability

Design and Control of Virtual Synchronous Machine Based Energy Systems

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