Distributed Sampled-data PID Control for Voltage Regulation in Inverter-Based Islanded Microgrids Using Artificial Delays. Issue 18 (2021)

• Record Type: Journal Article
• Authors: Caiazzo, Bianca; Fridman, Emilia; Petrillo, Alberto; Santini, Stefania
• Is Part Of: IFAC-PapersOnLine. Volume 54:Issue 18(2021)
• Page Start: 186
• Page End: 191
• Publication Date: 2021
• Subjects: Islanded MGs -- Secondary voltage control -- Sampled-Data control -- Artificial Delays -- LMIs; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2021.11.137
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: This paper addresses and solves the secondary voltage regulation control problem in inverter-based islanded Microgrids (MGs) via a fully distributed delayed sampled-data PID controller, whose derivative action is approximated using finite difference. By choosing a small enough sampling period and leveraging artificial delays approach, the proposed strategy ensures the secondary voltage regulation with closed-loop performances similar to ones achievable via a continuous-time PID controller, but with a significant reduction of the communication burden, while improving the efficiency of the entire MG. Exponential stability of the closed-loop MG network is analytically proved via Lyapunov-Krasovskii theory and the derived sampling-dependent stability conditions are expressed as a set of LMIs, whose solution allows finding the weighted L2 gain. Finally, a detailed simulation analysis confirms the effectiveness and the robustness of the proposed approach.