DETECTION OF CURRENT CIRCUITS FAULT FOR DIFFERENTIAL CURRENT PROTECTION

Microgrid Fault Protection Based on Symmetrical and Differential Current Components

Power Supply and Current Modulation Circuits for Semiconductor Lasers

Design and construction of a stable current supply with protection circuits are described. The reported circuit provides a high-stable and high-level current variable from 0.5-1.2 A with the protect ion circuits to prevent over load current, voltage and off-range temperature operation. A detailed analysis of the circuit parameters is given and the time behaviors of the load voltage/current and ...

Optimization of the test conditions for fault detection in nonlinear analog circuits using supply current

́ Abstract. In this paper, selection of the optimum test conditions for catastrophic fault diagnosis of analog circuits containing MOS transistors is presented. The method of fault detection applies power supply current waveform IDD as an indicator of a device feature. The stimulate signal parameters and values of additional components are changed in optimization process to extend variation betw...

ATP-EMTP study of current differential protection with synchronization and fault location functions

-This paper considers fault location and analytical synchronization of two-end measurements functions as embedded into a current differential protective relay. As a result of that, incomplete two-end measurements, i.e. three-phase currents measured at both line ends, while three-phase voltage only from only one end are considered for processing. Fault location and synchronization formulae are d...

Current Directional Protection of Series Compensated Line Using Intelligent Classifier

Current inversion condition leads to incorrect operation of current based directional relay in power system with series compensated device. Application of the intelligent system for fault direction classification has been suggested in this paper. A new current directional protection scheme based on intelligent classifier is proposed for the series compensated line. The proposed classifier uses ...