.png){kind=icon}
返回
A novel S-Transform-based pilot protection algorithm for transmission lines
.png){kind=icon}
PRE
AI
DOI：10.1016/j.epsr.2024.111321.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Traveling wave (TW) directional protection has attracted significant attention due to its ultra-high-speed action and susceptible performance. However, its low reliability under weak fault conditions makes it difficult to apply in practice. Based on the difference between the forward TW and the reverse TW after faults, this paper proposes a novel transient directional pilot protection algorithm for extra-high-voltage (EHV) transmission lines. The algorithm employs the S-transformed transient energy within a short time window to characterize the directional TW and determines the fault direction based on the polarity of the difference between the reverse TW energy and the forward TW energy. In a forward fault, the polarity of the difference between the reverse TW energy and the forward TW energy is positive. In a reverse fault, the polarity changes to negative. If the directional relays mounted at both terminals indicate a forward fault, an internal fault can be identified. Extensive EMTP-RV test results indicate that the proposed algorithm can accurately recognize the fault orientation at diverse strat fault angles, fault resistances, fault categories, and fault positions. Furthermore, even under adverse scenarios such as a 1000 Omega resistance fault, the algorithm exhibits high reliability.
Keyword:
Directional traveling wave
Pilot protection
Transmission line
S-transform
Extra-high-voltage
期刊
IF:
4.2
论文数:
1.2W
被引数:
2.2W
机构
引用论文
Traveling wave protection based on asynchronously sampled time difference of arrival of modulus traveling waves in per unit line length基于异步采样单位线路长度模数行波到达时间差的行波保护
PREAI
分享收藏A New Principle for Initial Traveling Wave Active Power Differential Busbar Protection.png)
IEEE ACCESS
OAAI
IEEE ACCESSIF3.6
OAAI分享收藏
查看更多内容