Solar PV-Based Scalable DC Microgrid for Rural Electrification in Developing Regions

Nasir, Mashood; Khan, Hassan Abbas; Hussain, Arif; Mateen, Laeeq; Zaffar, Nauman Ahmad

doi:10.1109/tste.2017.2736160

Cited by 206 publications

(115 citation statements)

References 26 publications

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“…Thus, for PV/battery-based rural electrification, a distributed architecture having minimum distribution losses, modularly scalable structure and communication-less control is highly desirable. Mashood et al [22] presented a PV-based distributed generation and distributed storage architecture (DGDSA) of DC microgrid for rural electrification. However, the hysteretic based voltage droop algorithm presented in [22] depends upon the perturbations in duty cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Mashood et al [22] presented a PV-based distributed generation and distributed storage architecture (DGDSA) of DC microgrid for rural electrification. However, the hysteretic based voltage droop algorithm presented in [22] depends upon the perturbations in duty cycle. A very small perturbation in duty makes the dynamics of system very slow to achieve the desired power sharing, while a higher perturbation in duty cycle may lead to instability.…”

Section: Introductionmentioning

confidence: 99%

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A Decentralized Control Architecture Applied to DC Nanogrid Clusters for Rural Electrification in Developing Regions

Nasir

Jin

Khan

et al. 2019

IEEE Trans. Power Electron.

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152

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DC microgrids built through bottom-up approach are becoming popular for swarm electrification due to their scalability and resource sharing capabilities. However, they typically require sophisticated control techniques involving communication among the distributed resources for stable and coordinated operation. In this work, we present a communication-less strategy for the decentralized control of a PV/battery-based highly distributed DC microgrid. The architecture consists of clusters of nanogrids (households), where each nanogrid can work independently along with provisions of sharing resources with the community. An adaptive I-V droop method is used which relies on local measurements of SOC and DC bus voltage for the coordinated power sharing among the contributing nanogrids. PV generation capability of individual nanogrids is synchronized with the grid stability conditions through a local controller which may shift its modes of operation between maximum power point tracking mode and current control mode. The distributed architecture with the proposed decentralized control scheme enables a) scalability and modularity in the structure, b) higher distribution efficiency, and c) communication-less, yet coordinated resource sharing. The efficacy of the proposed control scheme is validated for various possible power sharing scenarios using simulations on MATLAB/Simulink and hardware in loop facilities at microgrid laboratory in Aalborg University.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Decentralized Control Architecture Applied to DC Nanogrid Clusters for Rural Electrification in Developing Regions

Nasir

Jin

Khan

et al. 2019

IEEE Trans. Power Electron.

Self Cite

152

View full text Add to dashboard Cite

show abstract

“…The minimization of the grid utilization can be explained further through Figure 6, which shows the power taken by the battery to get charged through solar power (S b ) at any time t. Figure 6 shows that the power is taken from solar to charge the battery in "optimized case" is significantly higher compared with base case 2, as an intentional disconnection form grid is not inherently available. This trend can be seen during the peak time of solar power, ie, from an hour (10)(11)(12)(13)(14), where solar utilization by the battery can be seen at its summit in optimized case. To further elaborate on the dynamics of battery charging from solar, the graph for variations in SOC of the battery is shown in Figure 7.…”

Section: Resultsmentioning

confidence: 93%

“…The proposed solar integration scheme allows higher utilization of the solar resource, and therefore, the power demand from the grid is the lowest in the optimized case. This trend is visible during the sunlight hours (8)(9)(10)(11)(12)(13)(14)(15)(16) as the optimized methodology allows optimal sharing of the power from solar, battery, and grid to provide for the load, satisfying the main objective of the system that is the minimization of the total costs depend on the units purchased from the grid.…”

Section: Resultsmentioning

confidence: 99%

“…in home-based DC distribution, 8 solar PV intake, 9 and perceptiveness towards rural electrification has proved to be a transformative step in the future of solar PV. [10][11][12][13][14][15][16] Developed countries around the world have incentivized domestic solar installation through favorable policies such as attractive solar feed-in-tariff (FiT), 17,18 green certifications, and tax credits. to lower their energy dependence on fossil fuels and to promote solar energy, [19][20][21] encouraging domestic consumers to invest in roof top PV electricity generation with bidirectional energy transactions with utility grids.…”

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confidence: 99%

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Optimal power dispatch in solar‐assisted uninterruptible power supply systems

Siraj

Awais

Khan

et al. 2019

Int Trans Electr Energ Syst

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Summary Many countries in the developing world undergo regular power outages (scheduled and nonscheduled) due to lack of sufficient generation capability or transmission and distribution bottlenecks. Therefore, uninterruptible power supply (UPS) systems are commonly installed to critical power loads during daily power outages. While the integration of solar photovoltaic (PV) with these UPSs has seen rapid growth in recent years, their incorporation in conventional topologies is highly suboptimal. Therefore, in this work, we formulate a mathematical framework for optimal solar PV integration with domestic UPS systems for minimum cost solution incorporating all relevant system constraints and requisite system losses. We also propose and develop a retrofitting technological solution to integrate solar PV with typical UPS systems for optimal system operation. Results show that the proposed methodology and system implementation can achieve cost savings of up to 40.6% compared with conventional UPS system (without solar) in typical scenarios. In addition, with the proposed optimized utilization of PV, the grid utilization is decreased by 75% compared with the conventional case where UPS is integrated with solar using standard maximum power point charge controllers. This work is therefore highly useful for many developing regions with intermittent grids.

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Testing guidelines for connection of solar photovoltaic farm to distribution grid: The Malaysian experience

Yong

Ramachandaramurthy

Tan

et al. 2020

Int Trans Electr Energ Syst

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Summary Solar photovoltaic technology is intermittent in nature and employs power converters for grid‐interconnection, which can bring stability and power quality (PQ) issues to the power grid. Therefore, a set of testing guidelines is required to assure that solar plants comply with the grid and inverter requirements. As such, this article presents comprehensive testing guidelines for the interconnection of solar systems into Malaysian power grid, including inverter and PQ tests. The test points, conditions, parameters and acceptable limits for both tests are discussed in detail. This article also presents the results of a case study in which the testing guidelines were applied to examine the PQ of an actual grid‐connected solar photovoltaic plant in Malaysia and to assess the performance of the smart inverter used in the tested solar system. The testing outcomes, which were recorded by a PQ analyser, showed that the tested solar system was in compliance with all the requirements stipulated in the testing guidelines. The findings presented in this article will help relevant parties to understand these solar testing guidelines and serve to promote the wide deployment of solar technology towards a clean and sustainable future.

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Solar PV-Based Scalable DC Microgrid for Rural Electrification in Developing Regions

Cited by 206 publications

References 26 publications

A Decentralized Control Architecture Applied to DC Nanogrid Clusters for Rural Electrification in Developing Regions

A Decentralized Control Architecture Applied to DC Nanogrid Clusters for Rural Electrification in Developing Regions

Optimal power dispatch in solar‐assisted uninterruptible power supply systems

Testing guidelines for connection of solar photovoltaic farm to distribution grid: The Malaysian experience

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