Research on Virtual Synchronous Generator Control for Vehicle-to-Grid System

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Xinchen, Zhao^1 ; Hui, Wang^1 ; Ke, Wang^1

Shandong University, Shandong Province, Jinan, China^1

关键词: Control technologies;    Dual-loop control;    Mathematical analysis;    Mechanical inertia;    Normal controls;    Power electronic devices;    Power electronics devices;    Vehicle to Grid (V2G);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012048/pdf
DOI  :  10.1088/1757-899X/486/1/012048

来源: IOP

【 摘 要 】

This paper investigates the concept of Virtual Synchronous Generator (VSG) and analyses the working principle of common VSG control technology. With the promotion of Vehicle-to-Grid(V2G) technology, large-scale power electronics devices will be connected to the grid. Consequently, the stability of the grid will be influenced by the lack of mechanical inertia and system damping within these power electronic devices. The extant normal control methods are difficult to cope with this issue. Accordingly, a VSG control technology is proposed by this study, which can be applied to V2G system. Moreover, the mathematical analysis of this control method is also suggested in this research. This control method provides mechanical inertia and system damping, which is similar to synchronous generators. It also can achieve the accurate control of power. The original P/Q-U-I three-loop control is simplified to P/Q-I dual-loop control in the condition of not losing the inertia of the converter. Ultimately, the simulation examines the accuracy and effectiveness of the control method.