Article
Energy & Fuels
L. Hallemans, S. Ravyts, G. Govaerts, S. Fekriasl, P. Van Tichelen, J. Driesen
Summary: In recent years, there has been increasing scientific interest in Low Voltage DC (LVDC) grids as an alternative to traditional Low Voltage AC (LVAC) grids. However, fault detection and protection of LVDC microgrids still present a significant challenge. This paper proposes a stepwise methodology for the design of fault protection strategies in LVDC microgrids, aiming to make the design process more straightforward and transparent, and to evaluate the robustness and boundaries of the designed protection strategy.
Article
Engineering, Electrical & Electronic
Chunpeng Li, Puran Rakhra, Patrick J. Norman, Graeme M. Burt, Paul Clarkson
Summary: This article proposes a novel solution to address protection instability caused by time synchronization error in high-speed differential protection schemes for DC microgrids. The proposed multisample differential (MSD) scheme aims to ensure the stability of high-speed differential protection schemes for external faults while maintaining sensitivity to internal faults.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Wael T. El-Sayed, Maher A. Azzouz, Hatem H. Zeineldin, Ehab F. El-Saadany
Summary: This article proposes a new protection strategy for IIDGs that utilizes third harmonic voltage during faults to create a new current flow layer, independent of the fundamental fault current. The developed harmonic time-current-voltage directional relay ensures optimal protection coordination for isolated microgrids, without the need for communication.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Computer Science, Information Systems
Abdolhamid Farshadi, Behzad Keyvani Eydi, Hamed Nafisi, Hossein Askarian-Abyaneh, Arash Beiranvand
Summary: This paper studies the challenges brought by the rapid growth in the utilization of inverter-interfaced distributed energy resources (IIDERS) in microgrids to the network protection area. It proposes a protection algorithm based on the rate of change of direct-axis current component (id) to protect inverter-based microgrids (IBMGs). The effectiveness of the proposed protection method is evaluated by applying symmetrical and asymmetrical faults in different locations with different resistances simulated on a test IBMG system in PSCAD/EMTDC environment.
Article
Engineering, Electrical & Electronic
Seyed Fariborz Zarei, Hossein Mokhtari, Frede Blaabjerg
Summary: This article proposes a fault detection and protection strategy for islanded inverter-based microgrids, highlighting the challenge of limited fault current in VF-IBDERs. A voltage-restrained negative-sequence resistance-based fault detection approach is introduced, independent of fault current magnitude. The performance of the proposed scheme is demonstrated in a test MG in PSCAD/EMTDC environment.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Talal Elemamali Sati, Maher A. Azzouz, Mostafa F. Shaaban
Summary: Limited fault currents in inverter-interfaced islanded microgrids pose challenges to conventional protection schemes. This paper proposes a sensitive and selective protection scheme using third harmonic voltage generated by inverter-interfaced distributed generators. The scheme utilizes harmonic directional overcurrent relays (HDOCRs) to ensure optimal protection coordination of islanded microgrids. The proposed dual-setting optimizes relay settings based on generated harmonic voltages and currents, reducing relay operation times.
Article
Energy & Fuels
Yuchong Huo, Francois Bouffard, Geza Joos
Summary: In this paper, a new method for generating microgrid energy dispatch rule base using decision trees is proposed to match the control performance of full mixed-integer optimization while achieving effectiveness and computational efficiency.
Article
Automation & Control Systems
Neelesh Yadav, Narsa Reddy Tummuru
Summary: In this article, a cost-effective short-circuit fault detection method is proposed for a distribution network in the ac grid-connected low-voltage dc (LVdc) microgrid. The method considers a typical dc system with multiple dc/dc, ac/dc power converters, and loads interfaced to the dc link. The discharge behavior of a filter capacitor (FC) in power converters is utilized for fault identification using a time-frequency-domain-based wavelet transform (WT) for quantitative analysis.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Sima Ahmadi, Iman Sadeghkhani, Ghazanfar Shahgholian, Bahador Fani, Josep M. Guerrero
Summary: This article proposes a protection scheme effective for both bolted and high-resistance faults in LVdc feeders, relying on two intelligent electronic devices and calculating the normalized superimposed component of the line current.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Talal Elemamali Sati, Maher A. Azzouz, Mostafa Shaaban
Summary: This paper proposes an overcurrent protection scheme for islanded microgrids powered by droop-based IIDGs. The scheme modifies the inverter controller to protect inverter switches from overcurrent and limit IIDG fault currents. The coordination of directional overcurrent relays (DOCRs) is achieved using a two-stage optimization algorithm.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Energy & Fuels
Ann Mary Joshua, K. Panduranga Vittal
Summary: A differential protection scheme based on fundamental frequency superimposed current phasors is proposed for microgrid feeders in this paper. The scheme uses dq components instead of conventional Fourier algorithms to extract phasors. Simulations in MATLAB/SIMULINK software are carried out to test the performance of the proposed method for different fault scenarios. The results confirm that internal faults are detected in a few milliseconds, while the scheme remains insensitive to external faults with CT saturation and other system disturbances. The proposed scheme is unaffected by the microgrid mode of operation, direction of power flow, and DG type.
Article
Engineering, Electrical & Electronic
Abdallah A. Aboelnaga, Maher A. Azzouz
Summary: This paper investigates the phase selection problem in microgrid protection and proposes an adaptive zoning phase selection method to deal with the fault characteristics of renewable energy sources, thereby enhancing the reliability and resilience of the microgrid.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Computer Science, Information Systems
Navid Bayati, Hamid Reza Baghaee, Amin Hajizadeh, Mohsen Soltani
Summary: This article proposes a localized protection scheme for dc microgrids with radial configuration under the impact of constant power loads to accurately determine fault locations. By designing a local protection relay for CPLs based on transient behavior of current and voltage, and formulating fault resistance estimation through power sharing, the protection system's accuracy is improved. Through offline digital simulations and experimental verification, the proposed strategy shows high accuracy in fault location and resistance estimation.
IEEE SYSTEMS JOURNAL
(2021)
Article
Energy & Fuels
Yuchong Huo, Francois Bouffard, Geza Joos
Summary: This paper applies a flexibility-based operational planning method to microgrid unit commitment, combining learning and explicit model predictive control to address challenges in low-power computing controllers. The proposed approach adjusts computational complexity to meet hardware limitations while maintaining optimality, overcoming drawbacks of traditional methods. Through case studies, the effectiveness of the approach is demonstrated in solving microgrid unit commitment problems.
Article
Engineering, Electrical & Electronic
Jigyesh Sharma, Tarlochan S. Sidhu
Summary: Due to the unavailability of a suitable relay, utilities are using available IEDs for microgrid protection. However, these IEDs are not suitable for all microgrid architectures and fail to provide complete protection for inverter-based generators. This paper proposes a new protection technique that is independent of the generating source, inverter control, and microgrid architecture. Simulations and real-time evaluations are conducted to demonstrate the effectiveness of the proposed scheme.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Sankarsan Mohapatro, Nikhil Kumar Sharma, Apeksha Madhukar
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2017)
Article
Engineering, Electrical & Electronic
Nikhil Kumar Sharma, Subhransu Ranjan Samantaray
IET GENERATION TRANSMISSION & DISTRIBUTION
(2019)
Article
Engineering, Electrical & Electronic
Nikhil Kumar Sharma, Subhransu Ranjan Samantaray
IEEE TRANSACTIONS ON POWER DELIVERY
(2020)
Article
Computer Science, Information Systems
Nikhil Kumar Sharma, Subhransu Ranjan Samantaray
Summary: This article presents a protection scheme based on the magnitude-phase plane of impedance difference using wide-area positive sequence components of current and voltage signals for the microgrid. The proposed scheme is examined through extensive fault cases simulation with substantial variation in fault conditions, and is extensively tested and validated on the MATLAB/Simulink platform and a real-time digital simulator. The test results indicate that the magnitude-phase plane of the ID-based scheme can provide a dependable microgrid protection measure.
IEEE SYSTEMS JOURNAL
(2021)
Article
Computer Science, Information Systems
Nikhil Kumar Sharma, Subhransu Ranjan Samantaray, Chandrashekhar Narayan Bhende
Summary: The article proposes a fast and effective fault detection technique based on VMD for the LVdc distribution system, utilizing local end current measurements. Test results show that the proposed scheme has a faster response time under different fault and operating conditions, making it a potential candidate for providing effective protection measure for LVdc microgrid.
IEEE SYSTEMS JOURNAL
(2022)
Article
Computer Science, Information Systems
Smrutirekha Samal, Subhransu Ranjan Samantaray, Nikhil Kumar Sharma
Summary: This article presents an enhanced differential relaying scheme based on a data-mining model for fault detection and classification in microgrids. The scheme utilizes three-phase current signals and computes the differential current phasor, including distributed generation, in the fault model. Deep neural network models are built using differential current phasor datasets with wide variations in fault and operating conditions, and are validated on MATLAB/SIMULINK and Typhoon hardware-in-loop platforms. The results show high accuracy and speed in detecting and classifying faults, indicating the potential of this scheme for reliable protection in microgrids.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Suman Biswal, Nikhil Kumar Sharma, Subhransu Ranjan Samantaray
Summary: This study introduces a scheme based on the modified chaotic cuckoo search algorithm for identifying the optimal capacity and location of distributed generation units and capacitors in the radial distribution system. By minimizing two important cost and reliability-based objective functions, the optimized capacities and sites of the DGs are found. Extensive testing on different loading conditions has demonstrated technical benefits such as power loss reduction, reliability improvement, voltage stability enhancement, and power factor improvement.
ELECTRIC POWER COMPONENTS AND SYSTEMS
(2021)
Proceedings Paper
Energy & Fuels
Pradeep Kumar Reddy Manigilla, Nikhil Kumar Sharma, S. R. Samantaray
2017 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)
(2017)
Article
Engineering, Electrical & Electronic
Sankarsan Mohapatro, Srikanth Allamsetty, Apeksha Madhukar, Nikhil Kumar Sharma
