Small-Signal Modeling and Parameters Design for Virtual Synchronous Generators

Wu, Heng; Ruan, Xinbo; Yang, Dongsheng; Chen, Xinran; Zhao, Wenhui; Lv, Zhipeng; Zhong, Qing-Chang

doi:10.1109/tie.2016.2543181

Cited by 585 publications

(368 citation statements)

References 16 publications

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“…The VSG excitation regulator can directly control excitation current to stabilize the terminal voltage. According to Equations (11) and (12), the block diagram of a virtual excitation regulator can be illustrated in Figure 5.…”

Section: Virtual Excitation System Designmentioning

confidence: 99%

“…If part of these features can be introduced to a DG, some interesting methods can be adopted for the voltage and frequency stability control of a microgrid. Accordingly, to overcome the shortcomings introduced by the power electronic interfaces in a microgrid and to refer to the control ideas of classical generation systems, the concept of virtual synchronous generator has been proposed [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…In [11], the dynamic characteristics of VSG is studied with comparison with the droop control in both stand-alone mode and synchronous-generator-connected mode. Wu et al [12] focuses on the small-signal modeling and parameters design of the power loop of the VSG control, and points out that the bandwidth of the power loop should be far less than twice the line frequency for the purpose of avoiding the VSG output voltage to be severely distorted.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Virtual Synchronous Generator Based Hierarchical Control Scheme of Distributed Generation Systems

Yao

Wang

et al. 2017

Energies

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Sustainable energy-based generation systems, such as photovoltaic and wind turbine generation systems, normally adopt inverters to connect to the grid. These power electronic interfaces possess the characteristics of small inertia and small output impedance, which create difficulties to stabilize the voltage and frequency of a distributed power source. To deal with this problem, a Virtual Synchronous Generator (VSG)-based inverter control method is presented in this paper by introducing virtual inertia and damping coefficient into the control loop to emulate the dynamic behavior of a traditional synchronous generator. Based on this VSG control method, a three-layer hierarchical control scheme is further proposed to increase the control accuracy of the voltage and frequency in a VSG-based distributed generation system with parallel inverters. The principle of the VSG control method, the system stability analysis, the design process of the hierarchical control structure, and the frequency/voltage secondary regulation processes are all specified in this paper. Finally, some numerical simulations are carried out and the effectiveness of proposed control scheme is verified by the simulation results analysis.

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Section: Virtual Excitation System Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Virtual Synchronous Generator Based Hierarchical Control Scheme of Distributed Generation Systems

Yao

Wang

et al. 2017

Energies

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show abstract

“…These regulators are designed to emulate the behavior of classical synchronous generators with power converters associated to DG, ESSs, and loads connected to microgrids. In the literature, these techniques have been widely employed for diferent applications and are also known as virtual synchronous machines (VSMs) or synchronverters [8][9][10][11][12][13][14][15]. Following the main ac grid coniguration-where synchronous generators are directly connected-most of these techniques are usually employed for devices connected to ac microgrids.…”

Section: Lower-level Control Operation Modesmentioning

confidence: 99%

Hybrid AC/DC Microgrid Mode-Adaptive Controls

Unamuno¹,

Barrena²

2017

Development and Integration of Microgrids

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The lack of inertial response at microgrids is usually compensated by coniguring primary controllers of converter-interfaced devices to contribute in the transient response under power disturbances. The main purpose of this chapter is to study the modes of operation of primary level techniques of generation, storage, loads, and other devices atached to hybrid ac/dc microgrids. Although the chapter includes an analysis of the modes of operation of lower-level regulators, the focus is on upper-level or primary controllers.In this context, we analyze mode-adaptive controls based on voltage and frequency levels and we evaluate their behavior by simulation in the Matlab/Simulink ® environment. The results demonstrate that mode-adaptive techniques are adequate for maximizing the energy extracted by distributed generation (DG) systems and limit demand side management actuations while ensuring an adequate regulation of the microgrid.

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“…The traditional control method generally uses PQ, VF and droop control mode [1] [2] [3] [4] [5]. The inverter operates in these modes do not have inertia, once power disturbance occurs, it is unable to provide support for the grid voltage and frequency, Therefore some scholars put forward the virtual synchronous generator control strategy [6] [7] [8] [9] [10]. By adding virtual inertia in the inverter control system, make the external characteristic of inverter similar to synchronous generator.…”

Section: Introductionmentioning

confidence: 99%

Research on Seamless Switching Control Strategy Based on Virtual Synchronous Generator

Kang¹,

Wan²,

Zhang³

et al. 2017

EPE

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This paper studies the voltage, phase and current tracking strategy to eliminate voltage and current mutations when the virtual synchronous generator is switching between grid-connected and islanded. By using these strategies the inverter can realize secondary frequency regulation and voltage regulation. If the phase is near 0 or 2π a little disturbance may made the PLL output a big error, so a new PLL is proposed by this paper. A sine module is added in the PLL to avoid this error. In order to verify the strategy proposed by this paper a simulation model is built in Matlab/Simulink. The simulation results show that the control strategy can realize seamless switching.

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Small-Signal Modeling and Parameters Design for Virtual Synchronous Generators

Cited by 585 publications

References 16 publications

A Virtual Synchronous Generator Based Hierarchical Control Scheme of Distributed Generation Systems

A Virtual Synchronous Generator Based Hierarchical Control Scheme of Distributed Generation Systems

Hybrid AC/DC Microgrid Mode-Adaptive Controls

Research on Seamless Switching Control Strategy Based on Virtual Synchronous Generator

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