Research Article
PLC Based Overcurrent Protection of Three-phase Transmission Line
@INPROCEEDINGS{10.4108/eai.28-6-2020.2298248, author={Ahmed Ibraheem and Mohammed Ibrahim and Abdullah Shanshal}, title={PLC Based Overcurrent Protection of Three-phase Transmission Line}, proceedings={Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020}, publisher={EAI}, proceedings_a={IMDC-SDSP}, year={2020}, month={9}, keywords={programmable logic control current transformer precision rectifier protection system transmission line circuit breaker and function block diagram}, doi={10.4108/eai.28-6-2020.2298248} }- Ahmed Ibraheem
Mohammed Ibrahim
Abdullah Shanshal
Year: 2020
PLC Based Overcurrent Protection of Three-phase Transmission Line
IMDC-SDSP
EAI
DOI: 10.4108/eai.28-6-2020.2298248
Abstract
As the Transmission Line (TL) is an important part in the power system; this paper presents the design and practical implementation of overcurrent protection for three-phase TL system using Programmable Logic Control (PLC). The PLC then on-line monitring the vlaue of the load current in each phase and detect the overcurrent and simaltinouslly isolate the fault by sending an output signal for tripping the coil of the Circuit Breaker (CB). Display unit of the PLC is used for displaying the load current, in addition to alert maessage with the type of the occoured fault. The proposed contrroller program also cancel of the trip signal of the CB during a definite time of the inrush and stating load current. In addition, an automatic reclosing system for return the CB to the work when the overcurrent is released. PLC-based protection methods cost less, provides greater precision with a safe way of operation when compared with the other protection controllers system. Function Block Diagram (FBD) language is employed for implementing the proposed software controller. Simulation is made for the proposed controller via LOGO! Soft Comfort V7.0 software programs for virtual implantation of the program before downloading to the PLC.
