A visually driven nonlinear droop control for inverter-dominated islanded microgrids

Zandi, Farshad; Fani, Bahador; Golsorkhi, Akbar

doi:10.1007/s00202-020-00942-7

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…Therefore, the nonlinear model can achieve the following local diffeomorphism transformation. According to (13), the transformed Jacobian matrix is full rank, so the nonlinear system can achieve complete exact linearization.…”

Section: Design Of Nadrc Strategy Based On Vsg a Design Of Nadrcmentioning

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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Section: Design Of Nadrc Strategy Based On Vsg a Design Of Nadrcmentioning

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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“…The droop control is most commonly applied at the primary level. 183 This method is the conventional manner to share the demand power among the generators in a F I G U R E 8 Structure of microgrid control method microgrid. 184,185 Researchers in Reference 186 introduced a voltage-power droop/frequency reactive power boost control scheme to droop voltage reference for real power sharing and frequency reference for reactive power sharing inside a converter fed microgrid.…”

Section: Multilevel Control Schemementioning

confidence: 99%

A brief review on microgrids: Operation, applications, modeling, and control

Shahgholian

2021

Int Trans Electr Energ Syst

155

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Microgrid is an important and necessary component of smart grid development. It is a small-scale power system with distributed energy resources. To realize the distributed generation potential, adopting a system where the associated loads and generation are considered as a subsystem or a microgrid is essential. In this article, a literature review is made on microgrid technology.The studies run on microgrid are classified in the two topics of feasibility and economic studies and control and optimization. The applications and types of microgrid are introduced first, and next, the objective of microgrid control is explained. Microgrid control is of the coordinated control and local control categories. The small signal stability and methods in improving it are discussed.The load frequency control in microgrids is assessed.

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“…In nonconventional droop control, the P-f and Q-V characteristics are changed to take into account the power losses and other power-sharing related factors such as load changes and DGs capacities. Literature review showed that a few nonconventional droop schemes have tackled the issue of power losses in MGs, [5][6][7][8][9][10]. Hence, the role of nonconventional droop control in MGs power losses needs further inspection.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of using a nonconventional droop model on power-sharing, voltage regulation, system efficiency, and stability was tackled in [33]. The effects of adopting a nonconventional droop approach to achieve voltage regulation and improve reactive powersharing accuracy were also discussed in [34]. A metaheuristic OPF algorithm was also used to analyze power flow in electric distribution networks [35].…”

Section: Introductionmentioning

confidence: 99%

Power Loss and Total Load Demand Coverage in Stand-Alone Microgrids: A Combined and Conventional Droop Control Perspectives

2022

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Conventional droop control plays an essential role in microgrids with distributed generators, DGs, and variable load demand. Despite its advantages, the conventional droop scheme does not take into account the minimization of power losses and the maximization of the total load coverage. Moreover, most of the nonconventional droop control studies that address power loss consider one variable load. This study proposes a combined droop scheme and inspects its effects on power loss minimization and total load coverage. The proposed scheme combines conventional and nonconventional droop schemes and constructs a 3D P-f droop characteristic that takes into account the presence of two variable loads. Four and six-bus microgrids are adopted to simulate and illustrate the system behavior in MatLab. Results are compared to the standard fully conventional droop approach; results showed that the combined scheme has higher performance in terms of power loss gain and total load coverage.

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A visually driven nonlinear droop control for inverter-dominated islanded microgrids

Cited by 10 publications

References 27 publications

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

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

A brief review on microgrids: Operation, applications, modeling, and control

Power Loss and Total Load Demand Coverage in Stand-Alone Microgrids: A Combined and Conventional Droop Control Perspectives

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