With the increased penetration of distributed generation
the power grid will gradually develop into a converter-dominant network with low inertia and under-damped
which leads to stability problems becoming more and more serious. Virtual synchronous generator (VSG) control technologies can mimic the mechanism of synchronous generator to improve the system stability
which earns it more concern and wide application. Firstly
the architecture and principles of the virtual synchronous generator control system are described
and then some key issues about VSG modeling
operation control
stability analysis and typical application are deeply reviewed. Many potential research hot points and solutions about VSG are also proposed. This work is supported by National Natural Science Foundation of China (No. 51321005
No. 51567021)
National High Technology Research and Development Program of China (863 Program) (No.2012AA050204) and Qinghai Province Key Laboratory of Photovoltaic Power Generation and Grid-connected Technology (No. 2014-Z-Y34A).