Flexible Power-Sharing Control for Inverters-Based Microgrid Systems

Panjaitan, Seno Darmawan; Kurnianto, Rudi; Sanjaya, Bomo Wibowo

doi:10.1109/access.2020.3026820

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…The stability improvement of inverters in grid-connected microgrids is demonstrated in [8]. A flexible technique for a power-sharing control for AC microgrids that operate inverters in parallel to supply the demand is described in [9]. The performance of the least-mean-square (LMS) control algorithm is poor because the step size is fixed in this control.…”

Section: Introductionmentioning

confidence: 99%

Utility intertie multi‐photovoltaic‐inverters‐based microgrid control for solar rooftop

Chauhan

Singh

2022

IET Energy Syst Integration

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The solar photovoltaic (PV)-based microgrid is one of the most ideal renewable energy resources. This paper presents a utility grid intertie multi-PV-inverter-based microgrid (MG) control for the solar rooftop application. The main and ancillary voltage source converters (VSCs) DC links are assimilated with PV arrays of independent maximum power point tracking (MPPT) algorithms for the economical and efficacious single-stage configuration. At the point of common coupling (PCC), parallel VSCs arrangement increases the MG's power rating with distinctive local loads. In normal circumstances, the current control methodology is employed by the main VSC under the grid-interactive mode. Conversely, in some grid contingency conditions under the isolated mode, its control transfers to the voltage control, which regulates the frequency and the voltage at PCC and acts like a grid-forming inverter. The ancillary VSC operation is implemented with the current control algorithm. The main VSC supplies the active power towards the grid and accomplishes the load requirement, whereas the ancillary VSC retains its load demand in a grid-interactive mode and also regulates the load requirement in an islanded mode of operation. The utilization of feed-forward components for PV arrays powers in the VSCs current control techniques improves the MG dynamic performance. The seamless mode transfer performance of the main VSC is implemented via a power electronics switch. The MATLAB software is used to model a microgrid and its performance is analysed via RT-LAB in real time through the OPAL-RT (OP4510) controller for various scenarios, that is, varying solar insolation, load alterations and unbalanced non-linear loads. The utilization of the modified Kwong's algorithm-based current control enhances the power quality such as harmonics current elimination and improvement in the power factor. The voltage profile of PCC voltages is enhanced via using a modified Kwong's algorithm-based filter in the voltage controller. The modified Kwong's algorithm has fast convergence, reduces misadjustments and gives very good performance compared to the least-mean-square (LMS) and Kwong's approaches. The total harmonic distortion (THD) of grid currents and PCC voltages THD in an isolated mode is found according to the limits of the IEEE-519 standard.

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Section: Introductionmentioning

confidence: 99%

Utility intertie multi‐photovoltaic‐inverters‐based microgrid control for solar rooftop

Chauhan

Singh

2022

IET Energy Syst Integration

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“…This is particularly important when ancillary services, like demand-response, involving additional constraints to be met, have to be accommodated by relying on distributed energy resources interfaced by electronic power converters (EPCs). From this respect, automatic and predetermined power sharing techniques, see, for example, [12], typically constituting the primary control layer of microgrids [13,14], should be augmented to adapt to actual power needs and fulfill given power flow constraints optimally. A contribution from this perspective is given in [4], in which an optimal power flow controller is proposed considering steady-state operation.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Validation of Power Flow Control Method for Enhanced Operation of Microgrids

et al. 2020

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This paper describes a control methodology for electronic power converters distributed in low-voltage microgrids and its implementation criteria in general microgrid structures. In addition, a real-time simulation setup is devised, implemented, and discussed to validate the control operation in a benchmark network. Considering these key aspects, it is shown that operational constraints regarding the power delivered by sources, flowing through network branches, and exchanged at the point of connection with the main grid can generally be fulfilled by the presented control approach. The control is performed considering a cost function aiming at optimizing various operation indexes, including distribution losses, current stresses on feeders, voltage deviations. The control system allows an enhanced operation of the microgrid, specifically, it allows dynamic and accurate power flow control enabling the provision of ancillary services to the upstream grid, like the demand–response, by exploiting the available infrastructure and the energy resources. Then, the validation of the approach is reported by using a real-time simulation setup with accurate models of the power electronic converters and related local controllers, of the grid infrastructure, of the power flow controller, and of the communication network used for data exchange. It is also shown that the implemented platform allows to fully reproduce, analyze, and finally validate all the relevant steady-state and dynamic behaviors related in the considered scenario.

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Power quality enhancement of grid-islanded parallel microsources using new optimized cascaded level control scheme

Salem

Arafah

Salim

2022

International Journal of Electrical Power & Energy Systems

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Flexible Power-Sharing Control for Inverters-Based Microgrid Systems

Cited by 5 publications

References 27 publications

Utility intertie multi‐photovoltaic‐inverters‐based microgrid control for solar rooftop

Utility intertie multi‐photovoltaic‐inverters‐based microgrid control for solar rooftop

Real-Time Validation of Power Flow Control Method for Enhanced Operation of Microgrids

Power quality enhancement of grid-islanded parallel microsources using new optimized cascaded level control scheme

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