Author(s)

Atsushi Umemura, Rion Takahashi, Junji Tamura

Department of Electrical and Electronic Engineering, Kitami Institute of Technology, Kitami, Japan.

In recent years, power generation using renewable energy sources has been developed as a solution to the global warming problem. Among these power generation methods, wind power generation is increasing. However, as the penetration level of wind power generation increases, the low inertia and lack of synchronous power characteristics of the penetrated power system can have a significant impact on the transient stability of the grid. The virtual synchronous generator provides the ability of virtual inertia and synchronous power to interconnected inverters. The interconnected inverter with the virtual synchronous generator ability uses, in general, PI control based current controller. This paper proposes a new current-control method and compares it with conventional methods. The proposed current control is a method that follows virtual synchronous generator model that changes every moment by solving the discrete-time linear quadratic optimal control problem for each sampling time interval. The new method follows the conventional method, and therefore the reactive power fluctuation can be suppressed and the interconnected inverter will be downsized.

Wind Energy Generation, State Feedback, Electric Current Control, Linearization Techniques, Discrete Time Model Following Control, Virtual Synchronous Generator

Umemura, A. , Takahashi, R. and Tamura, J. (2020) The Novel Current Control for Virtual Synchronous Generator. Journal of Power and Energy Engineering, 8, 78-89. doi: 10.4236/jpee.2020.82004.