A review on overall control of DC microgrids

Kumar, Jaynendra; Agarwal, Anshul; Agarwal, Vineeta

doi:10.1016/j.est.2018.11.013

Cited by 198 publications

(93 citation statements)

References 140 publications

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“…(2) The proposed FOMPC method extends the traditional quadratic cost function and introduces a fractional-order integral cost function based on the GL fractional-order integral definition. (3) In comparison with the conventional integer-order MPC algorithm, the proposed FOMPC can improve the performance of an islanded microgrid especially under several conditions of load disturbance, parameter uncertainty and random dynamical fluctuations of wind turbines.…”

Section: Introductionmentioning

confidence: 99%

“…In the past decade, microgrids have been widely studied because of their potential environmental and economic benefits in regard to the integration distributed energy resources, especially renewable energy systems [1][2][3]. Due to the different types of distributed energy resources, dynamical load characteristics, power quality constraints, and perturbed system parameters, how to optimize control of a microgrid, for it to operate well under grid-connected and islanded modes, has been a challenging issue [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Fractional-Order Model Predictive Frequency Control of an Islanded Microgrid

et al. 2018

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Optimal frequency control of an islanded microgrid has been a challenging issue in the research field of microgrids. Recently, fractional-order calculus theory and some related control methods have attempted to handle this issue. In this paper, a novel fractional-order model predictive control (FOMPC) method is proposed to achieve the optimal frequency control of an islanded microgrid by introducing a fractional-order integral cost function into model predictive control (MPC) algorithm. Firstly, a discrete state-space model is derived for the optimal frequency control problem of an islanded microgrid. Afterward, a fractional-order integral cost function is designed to guide the FOMPC algorithm to obtain optimal control law by borrowing the Grünwald-Letnikov (GL) definition of fractional order calculus. Six simulation studies have been carried out to illustrate the superiority of FOMPC to conventional MPC under dynamical load disturbances, perturbed system parameters and random dynamical power fluctuation of wind turbines.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fractional-Order Model Predictive Frequency Control of an Islanded Microgrid

et al. 2018

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“…For this case study we focus on the non-interconnected islands (NIIs) or island grid scenario. In the microgrid architecture the three levels of operation are Primary, Secondary and Tertiary Control [18,19,[31][32][33]. The level of control depends on the operating state of the microgrid.…”

Section: Solomon Oyegokementioning

confidence: 99%

Frequency and Voltage Control of Island System using Power Hardware In the Loop

Oyegoke

Μανιατόπουλος

Keates

et al. 2019

2019 8th International Conference on Renewable Energy Research and Applications (ICRERA)

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Power generation via Distributed Generation (DG) plants coupled with inverters can participate in Frequency and Voltage stabilization of the microgrid which is important to grid operators. This paper explores the realization of improved regulation of frequency and voltages in a low voltage microgrid using droopcontrolled power converters. The test bed consists of a Power Hardware in the Loop (PHIL) setup, which includes a gridforming battery inverter, local loads, and DG plants. In the PHIL setup, the grid-forming battery inverter was responsible for setting the network voltage, which served the loads initially before the distributed energy resources were energized. Additional loads were then switched on triggering a frequency drop in the network. Changes in the load requirement and performance of the DGs were examined through the PHIL setup with the energy storage system further supporting as require. The results showed notable improvement in the overall system frequency and voltage regulation.

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“…In these conditions, the power electronic inverter in the PV system would not be capable of converting DC to AC power in the required level of voltage. With the implementation of high ratio DC-DC converters, MPPT and voltage regulation would be achieved, despite variations in irradiation and temperature [20], [21]. This way results in the efficiency improvement of the PV system.…”

Section: Introductionmentioning

confidence: 99%

Estimation of 80 kW Solar Generating Station in Kabudrahang Iran: A Comparative Study

2019

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Estimation of solar energy generation in the integrated power systems must be performed for power system the long-term planning and the short-term control. Irradiation is one of the main factors affecting the out coming energy of solar system. Hence, investigation of solar irradiation on the horizontal surface helps in proper and efficient implementation of solar energy system. Capturing much more energy from the irradiation, by the Photovoltaic (PV) cells, results in enhancement of out coming energy of PV station. This paper is going to study the impact of implementation two topologies for energy harvesting in PV stations. The topologies are as follows: (a) PV station with multilevel boost converters and inverters, (b) PV station with only multilevel inverters. Studies have been performed on 80 KW PV test station, located in Kabudrahang, Iran. The comparison between the results demonstrates much more solar energy harvesting in the case of applying multilevel converters in the output of PV arrays. Simulation results show the promising result of the proposed topology in harvesting maximum power from a PV station.

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A review on overall control of DC microgrids

Cited by 198 publications

References 140 publications

Fractional-Order Model Predictive Frequency Control of an Islanded Microgrid

Fractional-Order Model Predictive Frequency Control of an Islanded Microgrid

Frequency and Voltage Control of Island System using Power Hardware In the Loop

Estimation of 80 kW Solar Generating Station in Kabudrahang Iran: A Comparative Study

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