Transient Performance Improvement of Microgrid by a Resistive Superconducting Fault Current Limiter

Now a day's non-conventional energy sources like PV power and Wind power sources are well developed because conventional energy sources are reduced day by day and at the same time the population has been increased. These drawbacks can be overcome by developing the microgrids. In current trends, microgrid protection is a very challenging task. Due to the interconnection of several distributed generators, fault currents are produced. Resistive type superconducting fault current limiter is used for the protection of microgrids because its operating time is very less, it stops the abnormal currents with in the first cycle and continuity of supply is possible. But R-SFCL had some disadvantages, it is not compensated for the reactive power. Then voltage levels are not compensated, for that reason series active power filters are used along with R-SFCL. Here series active power filters are compensating the voltage magnitudes and reduce the harmonics and then transient stability is improved in the microgrids. This work is done using MATLAB/Simulink.

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“…In this article, with this proposed work, fault current limiting ratio at wind DG is increased from 42.1% [7] to 43.87%.…”

Section: Resultsmentioning

confidence: 95%

“…Zheng et al [7] have offered an R-SFCL for the protection of microgrids. But they are concentrated only on fault current limitations, not concentrate on reactive power and harmonics.…”

Section: Literature Reviewmentioning

confidence: 99%

Improvement of transient stability in microgrids using RSFCL with series active power filter

Rao

Rosalina

2019

SN Appl. Sci.

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“…In [21,22], the positioning of resistive-type SFCLs in direct-current (DC) and alternating-current (AC) micro-grids has been preliminarily discussed, and the simulation results imply that the SFCLs should be located in the direct path of current flowing from the DG units and the main network. In [23,24], the cooperative control of SFCL and an energy storage device is suggested to improve the robustness of a micro-grid against short-circuit faults, and the results are able to show the effectiveness of the proposed approach.…”

Section: Introductionmentioning

confidence: 98%

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

Chen

et al. 2016

Energies

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Abstract:Concerning the development of a micro-grid integrated with multiple intermittent renewable energy resources, one of the main issues is related to the improvement of its robustness against short-circuit faults. In a sense, the superconducting fault current limiter (SFCL) can be regarded as a feasible approach to enhance the transient performance of a micro-grid under fault conditions. In this paper, the fault transient analysis of a micro-grid, including distributed generation, energy storage and power loads, is conducted, and regarding the application of one or more flux-coupling-type SFCLs in the micro-grid, an integrated technical evaluation method considering current-limiting performance, bus voltage stability and device cost is proposed. In order to assess the performance of the SFCLs and verify the effectiveness of the evaluation method, different fault cases of a 10-kV micro-grid with photovoltaic (PV), wind generator and energy storage are simulated in the MATLAB software. The results show that, the efficient use of the SFCLs for the micro-grid can contribute to reducing the fault current, improving the voltage sags and suppressing the frequency fluctuations. Moreover, there will be a compromise design to fully take advantage of the SFCL parameters, and thus, the transient performance of the micro-grid can be guaranteed.

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“…In this type, the electronic switch connects to DC saturation current and does not have any conflict with the line current. Superconductive FCLs have been investigated for limiting the fault current in the microgrid [25,26]. FCLs can preserve microgrid from AC grid fault currents because the AC/DC microgrid should be protected in both the AC and DC sides [27].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Inductor H Bridge Fault Current Limiter

et al. 2019

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Current power systems will suffer from increasing pressure as a result of an upsurge in demand and will experience an ever-growing penetration of distributed power generation, which are factors that will contribute to a higher of incidence fault current levels. Fault current limiters (FCLs) are key power electronic devices. They are able to limit the prospective fault current without completely disconnecting in cases in which a fault occurs, for instance, in a power transmission grid. This paper proposes a new type of FCL capable of fault current limiting in two steps. In this way, the FCLs' power electronic switches experience significantly less stress and their overall performance will significantly increase. The proposed device is essentially a controllable H bridge type fault current limiter (HBFCL) that is comprised of two variable inductances, which operate to reduce current of main switch in the first stage of current limiting. In the next step, the main switch can limit the fault current while it becomes open. Simulation studies are carried out using MATLAB and its prototype setup is built and tested. The comparison of experimental and simulation results indicates that the proposed HBFCL is a promising solution to address protection issues.

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Transient Performance Improvement of Microgrid by a Resistive Superconducting Fault Current Limiter

Cited by 61 publications

References 17 publications

Improvement of transient stability in microgrids using RSFCL with series active power filter

Improvement of transient stability in microgrids using RSFCL with series active power filter

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

A Multi-Inductor H Bridge Fault Current Limiter

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