Abstract

The transmission system structure may sometimes be modified depending upon the power generation and demand at various locations in the power system. Usually, this leads to updates/changes in the relaying installations and makes the overall system to be more expensive. Therefore, it is vital to ensure the reliability of relaying installations with adaptiveness. This paper introduces an improved sequence current-based adaptive pilot relaying scheme. The scheme with its fixed settings can protect the compensated/uncompensated transmission networks with any structures against any type of faults with low impedance faults or high impedance arcing faults. The performance of the proposed scheme has been scrutinized using EMTDC/PSCAD simulation for almost all the adverse cases of faults for different test systems having different structures including a 9-bus WSCC system, IEEE 14-bus system, and TCSC-compensated line. The obtained results indicate that the scheme is robust, accurate, selective, and consistent for all the cases investigated.

摘要

有时可能会根据电力系统中不同位置的发电量和需求来修改传输系统结构。通常，这会导致中继安装的更新/更改并使整个系统变得更加昂贵。因此，确保具有适应性的继电装置的可靠性至关重要。本文介绍了一种改进的基于序列电流的自适应导频中继方案。具有固定设置的方案可以保护具有任何结构的补偿/未补偿传输网络免受低阻抗故障或高阻抗电弧故障的任何类型的故障。对于具有不同结构的不同测试系统（包括 9 总线 WSCC 系统、IEEE 14 总线系统和 TCSC 补偿线路）的几乎所有不利故障情况，已使用 EMTDC/PSCAD 模拟对所提出方案的性能进行了仔细检查。获得的结果表明，该方案对所有调查的案例都是稳健、准确、有选择性和一致的。