Adaptive Third-Zone Distance Protection Scheme for Power System Critical Conditions
Adaptive Third-Zone Distance Protection Scheme for Power System Critical Conditions
复制标题
电力系统危急情况自适应第三区距离保护方案
DOI：
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发表时间：
2021
影响因子：
4.4
通讯作者：
O. Malik
中科院分区：
文献类型：
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作者：
Kasimala Venkatanagaraju;M. Biswal;O. Malik
一个自适应的第三区域距离保护方案是必要的，以区分故障和系统的压力条件，如功率摆动，电压不稳定，负载侵占。在这些条件下快速可靠地检测第三区域三相故障仍然是一个具有挑战性的问题。为了解决这一问题，限制连锁停电，矩阵束法（MPM）的监督检测指标（SDI）的开发利用瞬时电流。利用MPM技术对信号进行了重构。接着，估计重构信号和原始信号之间的误差，然后计算估计误差的平均值。在建议的工作中，平均值的绝对最大值被认为是一个检测指标。该算法的主要目标是通过自适应阈值提供精确的检测和区分第三区三相故障的压力操作条件。该算法的有效性进行了仿真研究的IEEE 39节点测试系统和400 kV印度东部地区电网（IERG）使用PSCAD/EMTDC软件。结果表明，监督算法可以提高电力系统在关键运行条件下的安全性。
An adaptive third-zone distance protection scheme is necessary to distinguish between faults and system stressed conditions such as power swing, voltage instability, and load encroachment. Fast and reliable detection of third-zone three-phase fault during these conditions is still a challenging issue. To address this issue and to restrict the cascaded outages, a matrix pencil method (MPM) based supervised detection index (SDI) is developed by utilizing instantaneous current. Using MPM technique the signal is reconstructed. Next, the error between the reconstructed and the original signal is estimated and the mean of the estimated error is then calculated. The absolute maximum value of mean is considered as a detection index in the proposed work. The main objective of the proposed algorithm is to provide precise detection and discrimination of third-zone three-phase fault from stressed operating conditions through an adaptive threshold. Effectiveness of the proposed algorithm is illustrated by simulation studies carried out on the IEEE 39-bus test system and 400 kV Indian Eastern Regional Grid (IERG) using PSCAD/EMTDC software. The results demonstrate that the supervised algorithm can improve power system security during critical operating conditions.