Voltage-sag mitigation by stability-constrained partitioning scheme
Microgrids have the ability to function in islanded or grid-connected modes of operation. The increased penetration of inverter-based Distributed Energy Resources (DERs) in the system promotes the concept of partitioning the system into self-governing and self-adequate microgrids. Most of the partit...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Ain Shams Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447922001782 |
| _version_ | 1797897321081470976 |
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| author | Ahmed M. Mustafa Mohammed E. Nassar M.M.A. Salama Mohamed R. Hamouda |
| author_facet | Ahmed M. Mustafa Mohammed E. Nassar M.M.A. Salama Mohamed R. Hamouda |
| author_sort | Ahmed M. Mustafa |
| collection | DOAJ |
| description | Microgrids have the ability to function in islanded or grid-connected modes of operation. The increased penetration of inverter-based Distributed Energy Resources (DERs) in the system promotes the concept of partitioning the system into self-governing and self-adequate microgrids. Most of the partitioning techniques determine virtual boundaries and did not consider the survivability of the constructed microgrids. In this paper, a stability-constrained partitioning scheme is proposed based on small-signal stability to ensure microgrids' survivability when physically partitioned. Moreover, a sensitivity analysis of active power droop gain is utilized to define a novel index for the microgrid’s marginal stability. The application targeted in this paper is the mitigation of voltage-sag events caused by low impedance faults. The system will be partitioned into clusters of survivable microgrids during faults to isolate the faulted zone that caused the voltage-sag event. By isolating the voltage-sag origin from the rest of the system, voltage-sag mitigation is accomplished. Also, a microgrid re-connection method is proposed. This method allows multiple droop-controlled DERs to adjust the frequency, phase, and magnitude of their output voltages to facilitate seamless re-connection of microgrids. Simulation results are given that show a seamless re-connection of two different microgrids when the proposed method is utilized. The effectiveness of the proposed mitigation algorithm is validated using a modified IEEE 33-bus distribution system simulated on MATLAB/SIMULINK platform. |
| first_indexed | 2024-04-10T07:55:38Z |
| format | Article |
| id | doaj.art-b832a5a7c8d343e4ab666d007c8cff60 |
| institution | Directory Open Access Journal |
| issn | 2090-4479 |
| language | English |
| last_indexed | 2024-04-10T07:55:38Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj.art-b832a5a7c8d343e4ab666d007c8cff602023-02-23T04:31:07ZengElsevierAin Shams Engineering Journal2090-44792023-03-01142101867Voltage-sag mitigation by stability-constrained partitioning schemeAhmed M. Mustafa0Mohammed E. Nassar1M.M.A. Salama2Mohamed R. Hamouda3Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2l3G1, Canada; On leave of Electrical and Computer Engineering Department, Future University in Egypt, Cairo 11835, Egypt; Corresponding authors.Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2l3G1, CanadaDepartment of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2l3G1, CanadaDepartment of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2l3G1, Canada; Department of Electrical and Electronics Engineering, Coventry University Branch in Egypt, Cairo, Egypt; Corresponding authors.Microgrids have the ability to function in islanded or grid-connected modes of operation. The increased penetration of inverter-based Distributed Energy Resources (DERs) in the system promotes the concept of partitioning the system into self-governing and self-adequate microgrids. Most of the partitioning techniques determine virtual boundaries and did not consider the survivability of the constructed microgrids. In this paper, a stability-constrained partitioning scheme is proposed based on small-signal stability to ensure microgrids' survivability when physically partitioned. Moreover, a sensitivity analysis of active power droop gain is utilized to define a novel index for the microgrid’s marginal stability. The application targeted in this paper is the mitigation of voltage-sag events caused by low impedance faults. The system will be partitioned into clusters of survivable microgrids during faults to isolate the faulted zone that caused the voltage-sag event. By isolating the voltage-sag origin from the rest of the system, voltage-sag mitigation is accomplished. Also, a microgrid re-connection method is proposed. This method allows multiple droop-controlled DERs to adjust the frequency, phase, and magnitude of their output voltages to facilitate seamless re-connection of microgrids. Simulation results are given that show a seamless re-connection of two different microgrids when the proposed method is utilized. The effectiveness of the proposed mitigation algorithm is validated using a modified IEEE 33-bus distribution system simulated on MATLAB/SIMULINK platform.http://www.sciencedirect.com/science/article/pii/S2090447922001782Power qualityVoltage-sagDroop controlSmall-signal stabilityMicrogridsRe-connection |
| spellingShingle | Ahmed M. Mustafa Mohammed E. Nassar M.M.A. Salama Mohamed R. Hamouda Voltage-sag mitigation by stability-constrained partitioning scheme Ain Shams Engineering Journal Power quality Voltage-sag Droop control Small-signal stability Microgrids Re-connection |
| title | Voltage-sag mitigation by stability-constrained partitioning scheme |
| title_full | Voltage-sag mitigation by stability-constrained partitioning scheme |
| title_fullStr | Voltage-sag mitigation by stability-constrained partitioning scheme |
| title_full_unstemmed | Voltage-sag mitigation by stability-constrained partitioning scheme |
| title_short | Voltage-sag mitigation by stability-constrained partitioning scheme |
| title_sort | voltage sag mitigation by stability constrained partitioning scheme |
| topic | Power quality Voltage-sag Droop control Small-signal stability Microgrids Re-connection |
| url | http://www.sciencedirect.com/science/article/pii/S2090447922001782 |
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