Management of hybrid (AC-DC) micro-grids

Alsharif, Sameer; Loparo, Kenneth A.

doi:10.1109/energytech.2013.6645327

Cited by 4 publications

(1 citation statement)

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“…While accommodating electrical power via the main grid may lead to instability in the system and impose a countable wheeling charge, sub-grids enable prosumers to accommodate electrical power more flexibly and can support the main grid [14]. As a result, studies on the design and stability analysis of the sub-grid system have attracted increasing attention from both academia and industry [8,[15][16][17] in the last few decades.…”

Section: Introductionmentioning

confidence: 99%

A Power Control Method for Hybrid Electrical Accommodation Systems

Nguyen-Van

2021

Energies

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This paper presents a power control method for a hybrid electrical system, which enhances a conventional main AC grid by adding a DC sub-grid in parallel. In this system, each prosumer connects to the sub-grid via a couple of half-bridge inverters of a device called a power router. All of the power routers connected to the sub-grid are controlled such that they maintain the voltage of the sub-grid equally, which is an essential feature of peer-to-peer power accommodation without synchronization. This paper proposes an adaptive hysteresis current-control technique for controlling sub-grid-connected inverters that maintains the voltage of the sub-grid while accommodating a given power. The proposed control method also balances currents between positive and negative lines of the sub-grid simultaneously. The proposed control method is implemented on a high-speed FPGA-based digital controller and is evaluated on three prototypes of the power router. The experimental results show that the proposed method yields fast and stable responses and enables the power router to accommodate power with a high accuracy.

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