Power Swing Detection in Parallel Transmission Lines Connected to Wind Farms Employing del2sg Method

다국어 초록 (Multilingual Abstract)

A power system is reliable when it could satisfy consumer demand with desirable continuity and specific voltage quality. However, because of the ever-rising energy demand, power systems are becoming more complex. Moreover, environmental problems have aroused interest in the application of wind turbines in power networks. These items have caused the requirement for better and more sophisticated protection methods to upgrade the system reliability to be highly felt. In addition to accurate and timely detection of faults and quick disconnection of the defective part, modern protection systems have to be able to avoid faults as soon as possible and to maintain the stability of the system as well. Therefore, a power swing detection technique based on del2SG and IEC-61850 communication protocol was proposed in this article. At first, the challenges that distance relays face due to simultaneous faults with power swing are investigated in power systems connected to wind turbines. Afterward, different types of power swings and their characteristics are explained. The last step also investigates the performance of the proposed method during a power swing and simultaneous faults in the power network connected to a wind turbine, and without wind turbines. The simulation results demonstrate that the proposed method has a precise operation to detect various types of power swings and simultaneous faults in both examined networks. The comparison results between the conventional power swing detection methods and the proposed approach in this article show the superiority of the proposed method.