Title :
Analysis and countermeasures of misoperation of zero sequence pilot protection on circuit lines of same pole
Author :
Zeng, Genghui ; Cai, Zexiang ; Huang, Minghui ; Liu, Zhiyao
Author_Institution :
Coll. of Electr. Power, South China Univ. of Technol., Guangzhou
Abstract :
Zero sequence pilot protection is widely used in high-voltage electrical power system as a main protection for transmission lines. However, zero sequence pilot protection may misoperate under the influence of zero sequence mutual inductance. A misoperation of zero sequence pilot protection of same-pole transmission lines occurred in Guangdong power grid. In this paper, the misoperation is described in detail first. Then, the reason that zero sequence mutual inductance between same- pole transmission lines leads to the misoperation of zero sequence pilot protection are summarized. Some typical power network topologies that may cause misoperation of zero sequence pilot protection are listed. Finally, several countermeasures which can eliminate the misoperation of zero sequence pilot protection are proposed.
Keywords :
poles and towers; power grids; power transmission protection; high-voltage electrical power system; power grid; power network topologies; transmission lines protection; zero sequence mutual inductance; zero sequence pilot protection; Circuit faults; Distributed parameter circuits; Inductance; Network topology; Poles and zeros; Power grids; Power system analysis computing; Power system faults; Power system protection; Power transmission lines; Magnetically-strong and electrically-weak connected power network; Misoperation; Zero sequence mutual inductance; Zero sequence pilot protection;
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on
Conference_Location :
Nanjuing
Print_ISBN :
978-7-900714-13-8
Electronic_ISBN :
978-7-900714-13-8
DOI :
10.1109/DRPT.2008.4523721
