Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization

Guerrero, Josep M.; Vasquez, Juan C.; Matas, J.; Vicuña, Luis García de; Castilla, Miguel

doi:10.1109/tie.2010.2066534

Cited by 4,035 publications

(2,450 citation statements)

References 27 publications

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“…[21] for the term 0.5V d , therefore do not produce current flow in the balanced three phase load. Then the average phase to neutral voltages for the balanced star load with neutral n, are as in (27).…”

Section: Harmonic Balance Principlementioning

confidence: 99%

Stability evaluation of a DC micro-grid and future interconnection to an AC system

et al. 2014

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a b s t r a c tThis paper presents the stability analysis of a DC micro-grid fed by renewable sources and the future interconnection with an AC micro-grid. This interconnection is realized through a voltage source converter, and the operation of the micro-grid is in island mode. The stability is analyzed by the Nyquist criteria with the impedance relation method. The frequency response of the models was obtained by the injection of a perturbation current at the operation point. Where this perturbation was at the input of the converter used to export power from the DC grid. Other perturbation was applied at the node of the micro-grid to evaluate its impedance. Finally the simulations show the impedance representation of the systems, and the stability for the interconnection of them. The experimental verification shows the impedance of the converter with the same tendency as the representation obtained by the analytical and simulation.

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Section: Harmonic Balance Principlementioning

confidence: 99%

Stability evaluation of a DC micro-grid and future interconnection to an AC system

et al. 2014

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“…For this reason the droop control approach is mostly utilized both in AC and in DC power distribution grids, which defines the method of power sharing between various sources by means of definition of different droops according to their nominal power [9]. The droop control differs between AC and DC grids, because in a DC grid only supply bus voltage should be regulated, but in an AC grid -voltage and frequency.…”

Section: Instantaneous Energy Managementmentioning

confidence: 99%

Instantaneous, Short-Term and Predictive Long-Term Power Balancing Techniques in Intelligent Distribution Grids

Suzdalenko

Galkin

2013

IFIP Advances in Information and Communication Technology

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Abstract. An increased number of distributed small generators connected to the power grid allows higher total efficiency and higher stability of electrical power supply by exporting energy to the grid to be achieved during peak demand hours. On the other hand, it poses new challenges in structuring and developing the control approaches for these distributed energy resources. This paper proposes an improved method of real-time power balancing targeted to reaching long-term energy management objectives. The novel long-term energy management technique is proposed, that is based on load categorization and regulation of energy consumption by regulating electricity price function estimated with the proposed mathematical model. The method was evaluated by a Lab-VIEW model by simulating various types of loads. The price function for the defined energy generation pattern from renewable energy sources was obtained.Keywords: Intelligent Distribution Grid, Nanogrid, Energy Management, Instantaneous Power Balancing, Short-Term Energy Management, Pricing. IntroductionThe dynamic of worldwide installed power utilizing renewable energy sources (RES) is increasing year by year [1], showing global awareness of climate change and the footprint of human behavior on the nature: like mining activities that change the landscape and damages caused by oil plants. Another problem is related to the total effectiveness of energy from the primary fuel. It relates to the total system efficiency of energy delivery to the end-user from a mining site, which includes energy losses at middle stages, like use of energy at the mining stage, energy conversion losses, transmission (mechanical and electrical) losses, as well as end-device efficiency. Consequently, locally generated energy (especially from renewable energy sources) is preferable because it excludes most of the mentioned losses. As more distributed small generators are connected to the power grid, higher total efficiency and higher stability of electrical power supply by exporting energy to the grid during peak demand hours. On the other hand, it poses new challenges in structuring and developing the control approaches for these distributed energy resources.

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“…In both cases, the secondary controller should regulate the dc voltage of the MG. In centralized schemes, the voltage of localized loads connected to a common bus or the voltage at the coupling point into the utility grid should be regulated [9], [10]. On the other hand, in decentralized methods, the average voltage of generator busses (busses with voltage source converter), is controlled [6], [7], [10]- [12], [16] In the centralized secondary approach, it is considered the loads are localized at a common buss and the secondary controller regulates the voltage of the common bus at a reference value.…”

Section: Introductionmentioning

confidence: 99%

On Secondary Control Approaches for Voltage Regulation in DC Microgrids

Peyghami

Mokhtari

Davari³

et al. 2017

IEEE Trans. on Ind. Applicat.

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Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization

Cited by 4,035 publications

References 27 publications

Stability evaluation of a DC micro-grid and future interconnection to an AC system

Stability evaluation of a DC micro-grid and future interconnection to an AC system

Instantaneous, Short-Term and Predictive Long-Term Power Balancing Techniques in Intelligent Distribution Grids

On Secondary Control Approaches for Voltage Regulation in DC Microgrids

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