Improved single‐phase self‐synchronised synchronverter with enhanced dynamics and current limitation capability

Younis, Tarek; Ismeil, Mohamed A.; Hussain, E. K.; Orabi, Mohamed

doi:10.1049/iet-pel.2018.5582

Cited by 13 publications

(14 citation statements)

References 21 publications

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“…The small signal analysis may not replicate the complete non-linearity of the system, as it linearises the system around an operating point. However, the small signal analysis method is robust enough to study transient responses and design control parameters as shown in [4], [8], [10] and [15]. Hence, small signal analysis is applied for the proposed pre-synchronisation method as well.…”

Section: Transient Response Analysis Of Proposed Pre-synchronisation mentioning

confidence: 99%

Analysis and design of gradient descent based pre‐synchronization control for synchronverter

Hariharan

Mishra

2021

IET Renewable Power Gen

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Synchronverter (SV) control has emerged as a popular method for distributed energy resources (DERs), to emulate response of a synchronous generator. In this work, a simple gradient descent based pre‐synchronization control for SV scheme is proposed that varies the reference frequency in SV control alone. Thus, local load connection to DER can remain intact during synchronization with proposed pre‐synchronization method, unlike virtual current based methods. Normally, phase‐locked loop used for synchronization purpose, uses a first order loop filter such as a PI controller. In the proposed pre‐synchronization control, the inherent low pass filter of SV scheme itself is used as a loop filter. Transient response analysis is presented in this work, based on small signal transfer functions derived from the proposed method. From the theoretical analysis of proposed pre‐synchronisation control, design of the parameters is presented. Thus, there is no trial and error basis for parameters tuning in the proposed method, as compared to virtual current based methods. Validation of proposed pre‐synchronisation control through experiments are presented for all initial conditions. The transient response analysis, effectiveness of proposed method during local load changes and grid integration are verified by experimental results.

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Section: Transient Response Analysis Of Proposed Pre-synchronisation mentioning

confidence: 99%

Analysis and design of gradient descent based pre‐synchronization control for synchronverter

Hariharan

Mishra

2021

IET Renewable Power Gen

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“…Meanwhile, the steady-state power deviation has been nullified through a PI controller (see Fig. 10) [59], [60].…”

Section: ) Modified Single-phase Synchronvertersmentioning

confidence: 99%

“…However, the proposed synchronverter operates as a current source which contradicts the behaviour of original synchronverter. Similarly, the RPL has been retained and the RePL has been modified with a PI controller for voltage regulation [59]. The single-phase power values have been derived through orthogonal signal generation using a SOGI.…”

Section: ) Modified Single-phase Synchronvertersmentioning

confidence: 99%

Synchronverter: A Comprehensive Review of Modifications, Stability Assessment, Applications and Future Perspectives

et al. 2020

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The increase in the penetration of renewable energy sources (RES) has reduced the effective inertia of the power system dominated by synchronous machines. The reduction in inertia has paved the way to the development of inertia emulation techniques, which complements the increased penetration of RES. The synchronverter technology is one among the virtual inertia emulation techniques which resembles close to the synchronous machine. The advancements in control and adaptations of synchronverter for various applications demand a comprehensive yet critical review. Thus, the main objective of this paper is to present a critical review of synchronverter technology which could increase the inertial response of RES. A critical analysis of modifications made to original synchronverter and the stability assessment techniques is presented. The effect of parameter variation on stability and dynamic performance is brought out as a decision matrix by analysing the movement of eigenvalues presented in various works. Towards the end, a synoptic overview is presented to depict the research trend and emphasize the domain which requires further attention. Furthermore, a brief discussion of the research gaps perceived during the phase of review is presented to leverage future research in the field.

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“…Second category is to modify the operation of the interfacing power electronic converters to emulate as a synchronous generator. This method is popularly known Virtual Inertia, synchro-converter [16]- [26] etc. This paper mainly concentrates few of the methods proposed by the researches to improve the transient stability of the PV -Grid connected system.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Inertia of a Grid Connected PV System to Improve Frequency Regulation and Stability

Allemshetty¹,

Mangu²,

Reddy³

2021

AJCT

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Power generation from solar photovoltaics is rapidly increasing. In this scenario, this new technology has to work with the existing system in tandem to maintain stability during contingencies as it is a low inertia system. The interfacing power electronics devices have to be designed in such a way that the integration of the photovoltaic (PV) to the Grid is to be taken care during the disturbances. This paper presents the various issues when the PV penetration is comparable with the system capacity. The frequency of the system drops more in the PV-Grid connected system than the conventional generation system for same disturbance. Also, the frequency regulation methods get affected. The mode of operation of the inverter might be altered. An auxiliary source like batteries, ultra-capacitors is being suggested to balance the power for successful operation during abnormalities. In spite of this, many authors had developed new control techniques to mimic the interfacing inverter like conventional generating unit. The basic concepts of these methods have not explained in most of the literature. This paper reviews the concepts and applications of these methods and compares them.

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Improved single‐phase self‐synchronised synchronverter with enhanced dynamics and current limitation capability

Cited by 13 publications

References 21 publications

Analysis and design of gradient descent based pre‐synchronization control for synchronverter

Analysis and design of gradient descent based pre‐synchronization control for synchronverter

Synchronverter: A Comprehensive Review of Modifications, Stability Assessment, Applications and Future Perspectives

Enhancing Inertia of a Grid Connected PV System to Improve Frequency Regulation and Stability

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