Results 191 to 200 of about 207,280 (252)
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Effect of relay characteristics in optimum coordination of overcurrent relays
2020 IEEE Students Conference on Engineering & Systems (SCES), 2020The coordination of overcurrent relays require minimum tripping time at maximum fault current while backup relays, experiencing low fault current, follow the coordination criteria. The challenges arise as overcurrent characteristics perform diversely according to the magnitude of fault currents.
Tejas M Vala +3 more
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Microprocessor-Based Overcurrent Relays
IEEE Transactions on Industrial Electronics, 1986Inverse overcurrent is normally associated with the overcurrent relay types, the operation time is inversely proportional (in certain degrees) with their overcurrent ratio.
Mudhafar A. Al-Nema +2 more
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Simulation-Based Evaluation of IDMT Characteristics for Overcurrent Relay Protection
2023 4th International Conference on Intelligent Technologies (CONIT)In the realm of power system protection, the identified problem of reliable protection scheme underscores a crucial void in the design and execution of Inverse Definite Minimum Time (IDMT) overcurrent protection mechanisms.
Utkarsh Rishu, A. Mandpura, Rohan Pillai
semanticscholar +1 more source
Turkish J. Electr. Eng. Comput. Sci., 2021
: An exponential increase in diverse load demand in the last decade has influenced the integration of more power plants into the power system. This increases the fault current due to the bidirectional flow of current, resulting in unwanted tripping of ...
S. Ramli +6 more
semanticscholar +1 more source
: An exponential increase in diverse load demand in the last decade has influenced the integration of more power plants into the power system. This increases the fault current due to the bidirectional flow of current, resulting in unwanted tripping of ...
S. Ramli +6 more
semanticscholar +1 more source
Instantaneous Overcurrent Relays for Distance Relaying
Transactions of the American Institute of Electrical Engineers, 1935Instantaneous isolation of faults on transmission and distribution lines is ever a problem of the relay engineer. The use of instantaneous overcurrent relays as applied to the system of the Oklahoma Gas and Electric Company is discussed in this paper. Relays of this type were applied in conjunction with already installed overcurrent time delay relays ...
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IEEE Transactions on Industrial Informatics
Cyber-attacks that alter relay settings can cause relay malfunctions, increasing unsupplied energy, and diminishing system reliability. This article addresses the vulnerability of overcurrent adaptive protection schemes in active distribution networks ...
Mahdi GhotbiâMaleki +2 more
semanticscholar +1 more source
Cyber-attacks that alter relay settings can cause relay malfunctions, increasing unsupplied energy, and diminishing system reliability. This article addresses the vulnerability of overcurrent adaptive protection schemes in active distribution networks ...
Mahdi GhotbiâMaleki +2 more
semanticscholar +1 more source
Correlation functions based directional overcurrent relay
2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2012This paper describes a new directional overcurrent relay for protection of interconnected distribution network and DG unit. When the relay current exceeds its pick-up value, correlation of the voltage and current at the relay point as well as partial autocorrelation of the current are calculated.
Ebrahim Farjah +2 more
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Operation Logic Proposed for Time Overcurrent Relays
IEEE Transactions on Power Delivery, 2006This paper presents a new logic of operation for time overcurrent relays. With the application of the proposed technique, the sensitivity of time overcurrent relays is increased. In order to obtain this, the relay operates with a dynamic pickup setting, such as load current. Additionally, fast operation of overcurrent relays is obtained. The functional
A. Conde, E. Vazquez
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IEEE Transactions on Power Delivery, 2011
In this paper, a new objective function (OF) within the genetic algorithm (GA) approach is presented to solve the optimization problem of coordination of overcurrent and distance relays. The existing objective function of overcurrent (O/C) relays coordination is improved and extended to include the coordination of O/C and distance relays.
Reza Mohammadi Chabanloo +3 more
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In this paper, a new objective function (OF) within the genetic algorithm (GA) approach is presented to solve the optimization problem of coordination of overcurrent and distance relays. The existing objective function of overcurrent (O/C) relays coordination is improved and extended to include the coordination of O/C and distance relays.
Reza Mohammadi Chabanloo +3 more
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Current-Only Directional Overcurrent Relay
IEEE Sensors Journal, 2011Overcurrent relays are widely used for protection of power systems, directional ones for transmission side, and nondirectional ones for distribution side. The fault direction may be forward (between relay and grid), or reverse (between relay and source), the normal power flow being from source to the grid. Known directional overcurrent relays rely on a
Abhisek Ukil +2 more
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