Digital relays for smart grid protection
نویسنده
چکیده
Power system protection in electrical power engineering aims at eliminating a faulted part in an electric network from an otherwise healthy power system. Protection coordination involves a process of best timing any faulted currents so as to reduce the extension of outage areas to a minimum after a fault clearance. In the paper, innovative protection methods and devices widely based on computer relaying techniques and reporting are presented and discussed. Moreover, some procedures for the coordination and setting of protection relays are suggested. The main kinds of microprocessor-operated electronic releases analyzed in the study were overcurrent, directional overcurrent and undervoltage. Finally, possible future developments of digital protections are presented and discussed. Key-Words: computer relaying, digital protections, microprocessor operated releases, smart grids.
منابع مشابه
Smart grid data analytics for digital protective relay event recordings
Information systems and intelligent smart grid data analytics will have a critical role in managing the massive amount of data becoming available in power system substations. Digital protective relays are multi-functional intelligent electronic devices based on microprocessors, which are being installed in substations throughout the power grid. New digital relays are replacing old-fashioned ele...
متن کاملFault Detection in Ring Based Smart LVDC Microgrid Using Ensemble of Decision Tree
In modern infrastructure, the demand for DC power-based appliances is rapidly increasing, and this phenomenon has created a positive impact on the acceptance of the DC microgrid. However, due to numerous issues such as the absence of zero crossing, bidirectional behaviour of sources, and different magnitudes of fault current during grid connected and islanded modes of operation, protecting DC m...
متن کاملDecreasing Distribution Generation Effects on Grid Short Circuit Level Using Superconducting Fault Current Limiter Through Updating Relays Set-Points
Power system protection at transmission and distribution levels based on overcurrent relays is essential based on their properties such as detection, stability, high speed, backup and error correction accuracy. Since distributed generation sources are connected to the power grid, they not only increase the short circuit level of the grid, but also disrupt the set point of main and backup relays...
متن کاملSolutions to Design and Coordination Relays for Protection Challenges of Distribution Network with DG
In this paper in order to ensure that protection of the system remains reliable even after introduction of DG is studied key Protection Challenges of the DN with DG and established rules for the design and coordination of protective relays in a power system. Such as Differential Protection Schemes, A Balanced Combination of Different Types of DG Units for Grid Connection, Inverter Controller De...
متن کاملIntelligent Protection System for Smart Grid
The authors propose a concept for protection relay systems for operation within a Smart Grid and describe the results of a prototype development. This paper introduces each of the system characteristics that should be considered for protection operation within Smart Grid, and the evaluation methods that were applied under both normal and faulted conditions. The results of a field trial in the 6...
متن کامل