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A large number of distributed generations (DGs) connected to the distribution network have a significant impact on the stability of the power system due to their low inertia. Meanwhile the DGs are generally linked to the end of the distribution network, where power quality problems are very common. This paper applies virtual synchronous generator (VSG) technology in three-phase four-leg inverter....
In this paper, the static stability of droop control for a multiple grid-connected-inverter system is analyzed. The equations of droop coefficient to power capacity are derived. However, inverters based on conventional droop control have no inertia support for the power system. Therefore, a modified strategy adding virtual synchronous generator control to the conventional static droop approach is...
The concept of the virtual synchronous generator (VSG) is emerging as an attractive solution for controlling the grid-connected inverter when the renewable energy has a high penetration level into the grid. This paper focuses on the small-signal modeling and parameters design of the power loop of the VSG, and points out that the bandwidth of the power loop should be far less than twice the line frequency...
The Distributed power supply has an increasing influence on the stability of the micro-grid. Virtual synchronous generator technology can improve the stability of power grid with large inertia of synchronous generator. This paper describes the principle of virtual synchronous generator technology, as well as a detailed description of the control strategy of power frequency control and excitation control...
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