การจำลองแบบรีเลย์ป้องกันสำหรับใช้ในการสอนการป้องกันระบบไฟฟ้า / ศิวพงษ์ วงศ์ศิวะวิลาส = Protective relay simulation for use in power system protection education / Siwapong Wongsiwawilas
This thesis presents the simulation of three protective relays, i.e., overcurrent relay, differential relay and distance relay. The three protective relays are modeled and simulated using MATLAB/SIMULINK. They can be use for the evaluation of relay setting values before actual implementation and power system protection education. Laboratories of the overcurrent relay models demonstrate how to discriminate between primary relay and secondary relay of triangle-Y Transformer and protect malfunction from the energization of transformer using symmetrical components. A laboratory of the differential relay model shows an example of power transformer protection, how to select CT connection and set percent tap of auto transformer for compensating phase and magnitude of primary and secondary currents of the transformer. Laboratories of the distance relay model demonstrate the step distance protection technique, effect of compensate factor and multi-terminal line protection.
