Self-Synchronized Synchronverters: Inverters Without a Dedicated Synchronization Unit

  title={Self-Synchronized Synchronverters: Inverters Without a Dedicated Synchronization Unit},
  author={Qing-Chang Zhong and Phi-Long Nguyen and Zhenyu Ma and Wanxing Sheng},
  journal={IEEE Transactions on Power Electronics},
A synchronverter is an inverter that mimics synchronous generators, which offers a mechanism for power systems to control grid-connected renewable energy and facilitates smart grid integration. Similar to other grid-connected inverters, it needs a dedicated synchronization unit, e.g., a phase-locked loop (PLL), to provide the phase, frequency, and amplitude of the grid voltage as references. In this paper, a radical step is taken to improve the synchronverter as a self-synchronized… 

Filters for Grid Connected Self-Synchronized Synchronverter

  • Satyajeet S. Pore.P. Jadhav
  • Engineering
    2019 4th International Conference on Recent Trends on Electronics, Information, Communication & Technology (RTEICT)
  • 2019
In this project, design of LCL filter is accomplished and conceptual analysis of a grid tied synchronverter carried out in Matlab/ Simulink software for the interface between inverter and utility grid filter is required.

An Inbuilt Synchronization Controller for Three-Phase Synchronverters

  • R. HariharanM. Mishra
  • Engineering
    2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
  • 2018
A three-phase synchronverter control with an inbuilt synchronization unit is proposed in order to eliminate the external phase-locked loop (PLL) unit and the computation burden of the overall controller is reduced.

Improved Synchronverters with Bounded Frequency and Voltage for Smart Grid Integration

The stability region characterized by the system parameters is analytically obtained, which guarantees that the improved synchronverter is always stable and converges to a unique equilibrium as long as the power exchanged at the terminal is kept within this area.

Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection

This technique can be an improved model for inverter to have synchronization between inverter and microgrid which is not require a PLL circuitry model in order to maximize the power transfer from the inverters to the microgrid when it been applied to the distributed generation network.

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This paper presents the idea of phase-locked-loop-less (PLL-less) operation of grid-connected voltage source converters (VSCs) under new concept of inducverter, which offers a simpler and more reliable control strategy compared to the conventional methods.

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In this paper, a self-synchronization mechanism is embedded into the universal droop controller (UDC), which is applicable to inverters having an impedance angle between -π/2 rad and π/2 rad, to form

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A comparison table among the existing PLLs with synchronverter in terms of efficiency will be addressed and a brief summary of synchronization approaches is discussed sequentially from older techniques to latest technology.

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Virtual synchronous generator (VSG) is the concept of controlling the grid-connected inverters to mimic conventional synchronous generators (SGs), and it is considered to be a promising method to

An Integrated Control of Enhanced-PLL and Synchronverter for Unbalanced Grid

  • H. R.M. Mishra
  • Engineering
    2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
  • 2020
Synchronverter (SV) control is a popular control for distributed energy resources (DERs), as it has the capability of synchronous generator (SG) behaviour emulation. However, additional control along

Pre-synchronization Control Method of Virtual Synchronous Generator with Alterable Inertia

Virtual synchronous generator (VSG) is considered to be a promising grid-connect method for distributed generators (DGs) due to its inertial response and grid support ability. Just the same as



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The idea of operating an inverter to mimic a synchronous generator (SG) is motivated and developed, and the inverters that are operated in this way are called synchronverters.

Power-Synchronization Control of Grid-Connected Voltage-Source Converters

In this paper, a novel control method of grid-connected voltage-source converters (VSCs) is proposed. The method can be generally applied for all grid-connected VSCs but may be of most importance in

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  • Yi Fei WangY. Li
  • Engineering
    2010 IEEE Energy Conversion Congress and Exposition
  • 2010
During the grid synchronization of distributed generating (DG) units, phase-locked loop (PLL) is well accepted as an efficient approach to detect grid phase angle. Conventional PLL schemes used in DG

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This paper presents a grid synchronization scheme aimed to provide an estimation of the angular frequency and both the positive and negative sequences of the fundamental component of an unbalanced three-phase signal in fixed-reference-frame coordinates that shows certain capability to alleviate the effect of harmonic distortion that is present in the utility voltage signal.

Overview of Control and Grid Synchronization for Distributed Power Generation Systems

An overview of the structures for the DPGS based on fuel cell, photovoltaic, and wind turbines is given and the possibility of compensation for low-order harmonics is discussed.

Analysis and Design of a Digital Phase-Locked Loop for Single-Phase Grid-Connected Power Conversion Systems

A new digital phase-locked-loop (DPLL) method is proposed for single-phase grid-connected power conversion systems and validated to have good dynamic and static performances through MATLAB simulations, simulator investigations, and experiments with a grid- connected photovoltaic system under different voltage conditions.

A New Single-Phase PLL Structure Based on Second Order Generalized Integrator

Phase, amplitude and frequency of the utility voltage are critical information for the operation of the grid-connected inverter systems. In such applications, an accurate and fast detection of the

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A novel feedback mechanism for single-phase PLL phase detectors using the estimated phase angle is proposed that has the capability to eliminate the noise ripple entirely and, under extreme line distortion conditions, can reduce the ripple by at least half.

A Robust Single-Phase PLL System With Stable and Fast Tracking

  • S. Shinnaka
  • Engineering
    IEEE Transactions on Industry Applications
  • 2008
Phase, frequency, and amplitude of single-phase voltages are the most important and basic information required for single-phase grid-connected applications. This paper proposes a method for instantly