Parameters design in active power control of virtual synchronous generator considering power-angle characteristic nonlinearity

Li, Hui; Wang, Kaiyi; Chen, Zhiyong; Peng, Hanmei; Tan, Mao

doi:10.1016/j.ijepes.2021.106952

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…Based on the analysis of single-phase grid-connected inverters, some scholars have used the state-space method, phase diagram, and bifurcated diagram to prove that the dynamic performance of the system is closely related to the parameters of the nonlinear predictive controller [14]. In terms of the nonlinearization of VSG power Angle characteristics and the setting of active power control parameters in gridconnected mode, [15] and [16] select the relative maximum power coefficient in the optional domain through the configuration of extreme value points to improve the stability of the system. Similarly, a team designed an adaptive controller based on the depth deterministic strategy gradient algorithm to adapt the internal parameters of the system, so that the system has stronger anti-interference performance and dynamic and static adjustment performance [17].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Adaptive Disturbance Rejection Control Strategy Based on VSG for Photovoltaic-Storage Grid-Connected Inverter

Kong,

Zhang,

Zhuolin

et al. 2023

IEEE Access

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In this paper, a nonlinear adaptive disturbance rejection control (NADRC) strategy is designed to overcome the limitations of the traditional virtual synchronous generator (VSG) control method in photovoltaic (PV) grid-connected energy storage systems. This strategy utilizes exact feedback linearization and linear optimal control theory to establish a nonlinear adaptive disturbance rejection control law based on the virtual synchronous generator. It achieves zero static error control and noise adaptive stabilization of the AC link in a multiple-input multiple-output system. Compared with the simulation results of the grid-connected inverter voltage and current double closed-loop (VACDCL) strategy, the nonlinear adaptive disturbance rejection control effectively mitigates the fluctuations in load current caused by the photovoltaic energy storage module. It ensures power tracking under variable power conditions and outperforms traditional PI dual-loop control in terms of dynamic and static regulation performance as well as grid-connected current quality. Furthermore, this strategy's anti-disturbance adaptive link can quickly respond to system disturbances like frequency drift, voltage oscillations, and load current variations, thereby improving system performance.

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