Adaptive Command-Filtered Backstepping Control for Virtual Synchronous Generators

Chengshun Yang, Fan Yang, Dezhi Xu, Xiaoning Huang and Dongdong Zhang
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Chengshun Yang: Nanjing Institute of Technology, School of Electric Power Engineering, Nanjing 211167, China
Fan Yang: Nanjing Institute of Technology, School of Electric Power Engineering, Nanjing 211167, China
Dezhi Xu: School of IoT Engineering, Jiangnan University, Wuxi 214122, China
Xiaoning Huang: Nanjing Institute of Technology, School of Electric Power Engineering, Nanjing 211167, China
Dongdong Zhang: Nanjing Institute of Technology, School of Electric Power Engineering, Nanjing 211167, China

Energies, 2019, vol. 12, issue 14, 1-17

Abstract: Distributed energy sources are usually interfaced to the grid using power electronic converters, and lack of inertia in inverter dominated microgrids can affect the system stability. This paper presents a new method for virtual synchronous generator (VSG) control in order to solve the low system inertia and support the grid frequency problem. In this paper, the VSG based on electromagnetic transient characteristics is improved and an adaptive command filter back-stepping controller is designed. Firstly, the rotor swing equation and power part are modeled to complete the controller design for achieving system stability in the islanded, grid-connected and transition modes. In addition, a limited-amplitude command filter is used to deal with computational complexity and nonlinear saturation problems in the design process. Secondly, projection operator, and adaptive inertia and damping control are introduced to reduce the modeling error and disturbance caused by changing parameters. This ensures the boundedness of the estimated value and further improves the frequency response, especially in the transition mode. Finally, simulation results show that the proposed controller is more effective than the traditional control method for achieving power stability and frequency improvement.

Keywords: virtual synchronous generator (VSG); backstepping control; command filter; projection operator; direct grid-connection (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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