A Novel Protection Coordination Scheme Based on Dual-Setting Rate of Change of Voltage Based Relays

An efficient and reliable relay coordination scheme is essential to protect the power system from faults and damages due to unexpected events such as short circuits. To cope with the reverse direction of fault current dual-setting relays are evolved. This paper presents a novel protection coordination scheme based on a dual-setting rate-of-change-of-voltage (DS-ROCOV) relay which remains unaffected during load and generation changes and is applicable to different network topologies. The DS-ROCOV relay offers two different settings each for primary and backup protection. It also ensures that the protection system is sensitive to high resistance faults. The performance of the proposed protection coordination scheme is evaluated by simulating various fault conditions in IEEE 9-bus system using MATLAB/Simulink. The simulation results demonstrate that the proposed protection coordination scheme is effective in detecting and isolating faults while ensuring a quick response and minimizing unnecessary system outages. Overall, the proposed protection coordination scheme using DS-ROCOV enhances the reliability and selectivity of the protection systems in power distribution systems.