A unified AC-DC microgrid architecture for distribution of AC and DC power on the same line

Akshatha, S; Arun, C.; Abhijith, V S; Fernandes, B. G.

doi:10.1109/apec.2017.7930729

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…The hardware realization of load converter is presented in [18] and how the consumer can choose any frequency available power from the MF bus is explained. The architecture and converters of an MFMG are presented in [8]. The operation of the DC/MF converter is explained in [6] as grid feeding, forming, and load side converter of MFMG.…”

Section: A Literature On Mf Systemmentioning

confidence: 99%

“…In the modern power system, the number of DC loads is increasing rapidly. System efficiency is increased in MFMG by omitting the AC/DC transformation which is required for DC loads [8]. Transmission capacity is increased without changing the thermal capacity of the conductor by superimposing different frequency currents on the same wire keeping the voltage level same [9].…”

Section: Introductionmentioning

confidence: 99%

“…The architecture [4], converter [8], control strategies [4], [10] of MFMG are already defined. ESS can provide voltage and frequency support by storing/delivering active power during peak supply/load scenarios in a microgrid [11].…”

Section: Introductionmentioning

confidence: 99%

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Cooperative Active Power Management in Multifrequency Microgrid With an Energy Storage System Based on Distance of Source to Load

Dey

Nath

2022

IEEE Access

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A multifrequency microgrid (MFMG), which has different frequency voltages and currents on the multifrequency (MF) bus can be constructed based on superposition theorem, orthogonal power flow theory, and frequency selective power transmission criteria. It is a unique system where different frequency powers are present on the bus and all active powers maintain orthogonality by flowing simultaneously through a conductor without mixing. Due to the uncertainty and intermittency of renewable sources, an energy storage system (ESS) needs to be installed with MFMG to maintain stability and reliability. The ESS will be charged/discharged based on different frequency active power imbalances in the MF bus. Due to the presence of different frequency voltages and currents on the MF bus, the integration of ESS with MFMG is challenging but not yet discussed in any literature. In this paper, an architecture of MFMG is proposed with ESS. It is found that different new power imbalance cases arise in MFMG due to different frequency sources and loads, which are not present in traditional microgrids. Here, active power balancing conditions for all power imbalance cases are defined for grid connected and islanded mode. An algorithm is proposed to coordinate the ESS and different renewable sources to balance different frequency active power demands in MFMG for optimum power generation through communication under a cooperative framework. The framework is created based on the assumption that any load prefers to take power from the nearest source to minimize the power loss and cost. Different source load pairs are categorized based on the physical distance by different frequencies and accordingly the algorithm is structured. Finally, Matlab simulation of a sample 9 bus MFMG is performed to validate the algorithm and all results are presented.

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Section: A Literature On Mf Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cooperative Active Power Management in Multifrequency Microgrid With an Energy Storage System Based on Distance of Source to Load

Dey

Nath

2022

IEEE Access

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“…Power transfer at multiple frequencies have been implemented in various applications e.g. high-voltage dc-dc converters [9], [10], smart-grid [11]- [13], wireless power transfer [14], [15], ac motor drives [16], etc,. In [10], an additional frequency is used to implement nestled secondary power loop in a modular multilevel converter (M2C) to add multiple sources to M2C.…”

Section: Introductionmentioning

confidence: 99%

“…In [12], MF operation of a smart transformer (ST) based distribution grid is investigated. In [13], a unified ac-dc (UACDC) microgrid is proposed based on solid state transformer (SST). It employs a universal ac-dc converter at the load end to deliver power at the desired frequency.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Multifrequency Power Electronic Converters: Concept, Architectures, and Realization

Chitransh

Shetty

Das

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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There exists two well known types of power transfer ac or dc. Power transfer at multiple frequencies has not yet gained much attention. This paper aims at bringing out such topologies, which are capable of integrating different electrical power sources (ac or dc) irrespective of its frequency of generation, form a multi-frequency bus, transmit power over a single line and extract/convert them at the load side. This leads to the definition of unified utility/grid concept. For this, the paper presents more insight into three possible multi-frequency converter topologies with renewable energy sources (RESs)/battery integration. The proposed topologies work on the principle of orthogonal power transfer. Furthermore, power transfer at multiple frequencies shows an effective way of decoupling the individual sources of the system. Finally, the feasibility of transferring power at multiple frequencies is validated experimentally and the results are discussed herein along with its potential benefits.

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Comprehensive Analysis on DC‐Microgrid Application for Remote Electrification

Kishor

Rao

Patel

2022

Renewable Energy Technologies

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A unified AC-DC microgrid architecture for distribution of AC and DC power on the same line

Cited by 14 publications

References 9 publications

Cooperative Active Power Management in Multifrequency Microgrid With an Energy Storage System Based on Distance of Source to Load

Cooperative Active Power Management in Multifrequency Microgrid With an Energy Storage System Based on Distance of Source to Load

Evaluation of Multifrequency Power Electronic Converters: Concept, Architectures, and Realization

Comprehensive Analysis on DC‐Microgrid Application for Remote Electrification

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