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

Sánchez, Santiago; Molinas, Marta; Degano, Marco; Zanchetta, Pericle

doi:10.1016/j.renene.2013.08.026

Cited by 33 publications

(10 citation statements)

References 15 publications

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“…The transient effects depending upon the conditions like [22], (i) conditions of system before islanding and (ii) conditions which cause the islanding. In any case, the microgrid needs to be working, so that it needs to enhance the dynamic response of the system [23]. …”

Section: IVmentioning

confidence: 99%

Transient Analysis of Isolated Micro Grid using Droop Controller during Faults

Vakula¹

2018

IJRASET

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Now a days the scenario is in the direction of renovating centralised power generation to distribution generation. Distribution generation is considered to be a supplementary source of power in addition to the centralized power generation. Micro resource and distributed generation through controllers, loads and storage space devices to create a micro grid(MG). The micro grid senses and switches to isle mode in case of interruption. For this purpose, P-F&Q-V Droop control method is adopted to observe its impact during transient stability period. The proposed work gives the impact of droop control technique and stability of DG based on inverter arrangement of micro grid. In this fast acting current limiter is also employed to reduce the short circuit current there by decreasing the heating effect of the transmission lines.

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Section: IVmentioning

confidence: 99%

Transient Analysis of Isolated Micro Grid using Droop Controller during Faults

Vakula¹

2018

IJRASET

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“…Therefore, DC microgrids avoid cumbersome DC-AC-DC generation [1][2][3][4]. However, the usage of DC microgrids at distribution scale is increasing with the collaboration of various renewable resources due to the higher penetration of electric vehicles [5][6][7]. DC microgrids reduce the number of conversion units and also overcome the disadvantages of AC power, such as transformers inrush current, phase angle, frequency synchronization, reactive power, and power quality [3,8,9].…”

Section: Introductionmentioning

confidence: 99%

A Control Methodology for Load Sharing System Restoration in Islanded DC Micro Grid with Faulty Communication Links

et al. 2018

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Abstract:Communication-based distributed secondary control is extensively used in DC microgrids. Compared to centralized control, it can provide better voltage regulation and load sharing in microgrids. A conventional secondary control technique that converges the system to a common operating point is improved by using the control methodology to detect the communication link failure and stabilize the system operation during communication islanding. Recently, more robust control schemes have been proposed to improve resilience, but communication islanding has not been addressed at the secondary level control for which the system requires additional tertiary control. However, link failure is a possibility in the microgrid, so this paper proposes a control scheme at the secondary level to detect communication islanding. Communication islanding may lead the system to unpredictable behavior, which may cause the system to become unstable and may further lead to a cascading failure. The proposed control scheme sustains the stability and operation of a DC microgrid. Voltage and current observer works in a parallel manner with the proposed secondary control to achieve a correction term for global operating points. The proposed control scheme has been verified through analysis and simulation.

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“…In the proposed system, the converter for battery testing can be designed as a single-stage current-feed DC/DC converter for charging and discharging test experiment, and all the testing instruments share the same DC-bus. To compensate or absorb the additional energy, an energy storing system is configured in the proposed scheme, thus, a DC-microgrid system is formed [15,16]. In this way, the recovered energy can be reused for other local loads, which increase the system efficiency and simplify the control strategy for a DC-micro-grid.…”

Section: Introductionmentioning

confidence: 99%

Energy Management of a Grid-connected High Power Energy Recovery Battery Testing System

Zhang¹,

Liu²,

Yoo³

et al. 2016

Journal of Electrical Engineering and Technology

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-Energy recovery battery testing systems (ERBTS) have been widely used in battery manufactures. All the ERBTS are connected in parallel which forms a special and complicated microgrid system, which has the shortcomings of low energy recovery efficiency, complex grid-connected control algorithms issues for islanded detection, and complicated power circuit topology issues. To solve those shortcomings, a DC micro-grid system is proposed, the released testing energy has the priority to be reutilized between various testing system within the local grid, Compared to conventional scheme, the proposed system has the merits of a simplified power circuit topology, no needs for synchronous control, and much higher testing efficiency. The testing energy can be cycleused inside the local micro-grid. The additional energy can be recovered to AC-grid. Numerous experimental comparison results between conventional and proposed scheme are provided to demonstrate the validity and effectiveness of the proposed technique.

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

Cited by 33 publications

References 15 publications

Transient Analysis of Isolated Micro Grid using Droop Controller during Faults

Transient Analysis of Isolated Micro Grid using Droop Controller during Faults

A Control Methodology for Load Sharing System Restoration in Islanded DC Micro Grid with Faulty Communication Links

Energy Management of a Grid-connected High Power Energy Recovery Battery Testing System

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