Results 161 to 170 of about 2,477 (219)
Some of the next articles are maybe not open access.
ANN based directional overcurrent relay
2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294), 2002This paper describes the design and development of an ANN based novel directional overcurrent relay. A multi-layer feedforward neural network (FFNN) trained with the error backpropagation algorithm has been developed to realize this relay. The ANN based algorithm is off line tested using different simulation equations for overcurrent and voltage under ...
D.N. Vishwakarma, Z. Moravej
openaire +1 more source
Electric Power Systems Research, 1996
Abstract This paper presents the design and construction of overcurrent and directional overcurrent relays with ground fault protection for the protection of three-phase subtransmission and distribution systems, using a 16-bit microprocessor, the Intel 8096BH. The relay obtains the system currents at the rate of 12 samples per cycle and estimates the
Zhijun, G., Elangovan, S., Liew, A.C.
openaire +1 more source
Abstract This paper presents the design and construction of overcurrent and directional overcurrent relays with ground fault protection for the protection of three-phase subtransmission and distribution systems, using a 16-bit microprocessor, the Intel 8096BH. The relay obtains the system currents at the rate of 12 samples per cycle and estimates the
Zhijun, G., Elangovan, S., Liew, A.C.
openaire +1 more source
Designing of Numerical Directional Overcurrent Relay
2018 International Conference on Smart Electric Drives and Power System (ICSEDPS), 2018This paper gives an insight into designing of numerical directional over-current relay for distribution system using real time signals. For fault detection differential sampling method is used. Real time signals are converted in discrete form using an advanced analog to digital conversion device Advantech USB 4711/A.
Rupal Agarwal +2 more
openaire +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.
E. Farjah, T. Ghanbari, S. Rezaee
openaire +1 more source
Optimal coordination of directional overcurrent relay coordination
IEEE Power Engineering Society General Meeting, 2005, 2005Directional overcurrent relays are used to protect interconnected power systems and looped distribution systems. Several techniques and formulations have been proposed to solve the directional overcurrent relay problem. In this paper, the proposed formulations for relay coordination problem are discussed.
H. Zeineldin +2 more
openaire +1 more source
A new one-cycle directional overcurrent relay
Electrical Engineering, 1943This paper describes a new one-cycle directional overcurrent relay which is not limited in its application by lack of contact co-ordination. That contact coordination is important is indicated by the many incorrect relay operations which have been traced to the common practice of adding instantaneous attachment to directional overcurrent relays.
openaire +2 more sources
Optimal Directional Overcurrent Relays Coordination using Directional Bat Algorithm
2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America), 2019Coordination of directional overcurrent relays is most often made based on manual procedures. However, due to its complexity and time-consuming, these procedures have been formulated as an optimization problem. The aim of this paper is to present a directional Bat Algorithm (dBA) as a potential algorithm for optimal coordination of directional ...
Felipe C. Sampaio +5 more
openaire +1 more source
INTEGRATED SOFTWARE FOR OPTIMAL DIRECTIONAL OVERCURRENT RELAY COORDINATION
Electric Machines & Power Systems, 1994ABSTRACT This paper reports the development of fully integrated software for the optimal directional overcurrent relay coordination of interconnected power systems. Different software packages like load flow analysis, fault analysis, determination of backup/primary relay pairs, main relay coordination program, etc. have been integrated.
NASEER A. LAWAY, H. O. GUPTA
openaire +1 more source
Optimal coordination of directional overcurrent relays considering definite time backup relaying
IEEE Transactions on Power Delivery, 1999A methodology is presented for the consideration of definite-time backup relays in the optimal coordination of directional overcurrent relays using linear programming. It is shown that the influence of considering second-zone distance relays and breaker failure relays impose important requirements for the determination of the time dial settings of ...
L.G. Perez, A.J. Urdaneta
openaire +1 more source
Hybrid optimization algorithm for directional overcurrent relay coordination
2014 IEEE PES General Meeting | Conference & Exposition, 2014This work presents a method for directional overcurrent relay (DOR) coordination in a meshed power system by optimizing its operating time. The meshed power system is part of a Brazilian power transmission system, which has been evaluated via CAPE (Computer-Aided Protection Engineering) software for short circuit studies.
Fernando B. Bottura +4 more
openaire +1 more source