Adjusting Synchronverter Dynamic Response Speed via Damping Correction Loop

Dong, Shuan; Chen, Yu Christine

doi:10.1109/tec.2016.2645450

Cited by 191 publications

(94 citation statements)

References 20 publications

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“…This modification allowed for an improved control over the response speed of the frequency loop proposed in [29]. In a similar theme, an auxiliary loop around the frequency-loop was proposed in [83] which allowed for a free control of the response speed of synchronverter. This auxiliary loop did not affect the steady-state drooping mechanism of the synchronverter which is very desirable.…”

Section: Second Generation Of Synchronvertersmentioning

confidence: 99%

Virtual Inertia: Current Trends and Future Directions

et al. 2017

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Abstract:The modern power system is progressing from a synchronous machine-based system towards an inverter-dominated system, with large-scale penetration of renewable energy sources (RESs) like wind and photovoltaics. RES units today represent a major share of the generation, and the traditional approach of integrating them as grid following units can lead to frequency instability. Many researchers have pointed towards using inverters with virtual inertia control algorithms so that they appear as synchronous generators to the grid, maintaining and enhancing system stability. This paper presents a literature review of the current state-of-the-art of virtual inertia implementation techniques, and explores potential research directions and challenges. The major virtual inertia topologies are compared and classified. Through literature review and simulations of some selected topologies it has been shown that similar inertial response can be achieved by relating the parameters of these topologies through time constants and inertia constants, although the exact frequency dynamics may vary slightly. The suitability of a topology depends on system control architecture and desired level of detail in replication of the dynamics of synchronous generators. A discussion on the challenges and research directions points out several research needs, especially for systems level integration of virtual inertia systems.

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Section: Second Generation Of Synchronvertersmentioning

confidence: 99%

Virtual Inertia: Current Trends and Future Directions

et al. 2017

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“…However, since the overall system shows lowpass filter characteristic and limited unbalance degree, the modelling error caused by the periodic components in steady state is acceptable [28]. The comparison of bode diagrams of both the conventional and modified synchronverter are illustrated in Figure 7 according to (12) and (26). The red line in Figure 7 is the bode diagram of conventional synchronverter and it's observed that the magnitude of transfer function from [vd, vq]…”

Section: Modified Self-synchronized Synchronvertermentioning

confidence: 99%

“…The comparison of bode diagrams of both the conventional and modified synchronverter are illustrated in Figure 7 according to (12) and (26). The red line in Figure 7 is the bode diagram of conventional synchronverter and it's observed that the magnitude of transfer function from…”

Section: Modified Self-synchronized Synchronvertermentioning

confidence: 99%

“…In [24], small signal model of synchronverter is established to analyze the stability of the battery system. The small signal models are also established in [25,26] to design the parameters of synchronverter in order to achieve better dynamic performance. It can be seen that the small signal model can reflect the stability of the system at specific steady operation point in a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

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A Modified Self-Synchronized Synchronverter in Unbalanced Power Grids with Balanced Currents and Restrained Power Ripples

et al. 2019

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This paper proposes a modified self-synchronized synchronverter for unbalanced power grids. Small signal analysis of the conventional synchronverter shows that its stability margin around 50 Hz is very limited. Thus, power ripples will be caused at the frequency of 50 Hz. Filter- based current feeding loops are adopted in the conventional synchronverter in order to enhance its stability and eliminate power ripples. In addition, the characteristics of the conventional synchronverter in unbalanced power grids are analyzed, and an improved strategy using a resonant controller is proposed to restrain the current harmonics and power ripples. The parameter design is also studied for the proposed synchronverter. Experimental studies prove that the proposed strategy can achieve precise self-synchronization when the grid voltage is unbalanced, and the power-control performance is also improved significantly.

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“…However, these strategies can not be applied to VSG directly, due to the difference between VSG and traditional control strategies. Some research about the oscillation damping by VSG are presented in [22][23][24][25][26][27][28], and one of the main methods of suppressing oscillation by VSG is to dynamically adjust the control parameters during the transient process in existing research [22][23][24][25]. A self-tuning virtual synchronous machine (VSM) is proposed in [22].…”

Section: Introductionmentioning

confidence: 99%

Virtual Synchronous Generator Based Auxiliary Damping Control Design for the Power System with Renewable Generation

Gao

Xia

Chen³

et al. 2017

Energies

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Abstract:Aiming for large-scale renewable energy sources (RES) integrated to power systems with power electronic devices, the technology of virtual synchronous generator (VSG) has been developed and studied in recent years. It is necessary to analyze the damping characteristics of the power system with RES generation based on VSG and develop its corresponding damping controller to suppress the possible low frequency oscillation. Firstly, the mathematical model of VSG in a per unit (p.u) system is presented. Based on the single-machine infinite bus system integrated with an RES power plant, the influence of VSG on the damping characteristics of the power system is studied qualitatively by damping torque analysis. Furthermore, the small-signal model of the considered system is established and the damping ratio of the system is studied quantitatively by eigenvalue analysis, which concluded that adjusting the key control parameters has limited impacts on the damping ratio of the system. Consequently, referring to the configuration of traditional power system stabilizer (PSS), an auxiliary damping controller (ADC) for VSG is designed to suppress the low frequency oscillation of the power system. Finally, simulations were performed to verify the validity of theoretical analysis and the effectiveness of designed ADC.

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Adjusting Synchronverter Dynamic Response Speed via Damping Correction Loop

Cited by 191 publications

References 20 publications

Virtual Inertia: Current Trends and Future Directions

Virtual Inertia: Current Trends and Future Directions

A Modified Self-Synchronized Synchronverter in Unbalanced Power Grids with Balanced Currents and Restrained Power Ripples

Virtual Synchronous Generator Based Auxiliary Damping Control Design for the Power System with Renewable Generation

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