Research on the influence of TCSC to EHV transmission line protection

Author

Liu Qing ; Wang ZengPing

Author_Institution

Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Baoding

fYear

2008

fDate

6-9 April 2008

Firstpage

2258

Lastpage

2261

Abstract

Thyristor controlled series capacitor (TCSC) used in power transmission line can increase the transportability and the stability of system, and decrease the system loss significantly. At the same time, TCSC brings many serious problems to transmission lines fault location and protective relaying. This paper analyzes the influence of TCSC to EHV transmission line protection, especially to the high-frequency directional protection. It can be obtained from the analyzing that the addition of TCSC to EHV transmission line would make the high-frequency directional protection unwanted operation or failure to operate. In order to solute the problems TCSC caused, this paper presents a novel transient protection scheme based on wavelet transform (WT). The simulation tests have proved that the analyzing and solution of the appearance of TCSC in EHV transmission line are correct.

Keywords

power transmission faults; power transmission protection; relay protection; thyristor applications; wavelet transforms; EHV transmission line protection; TCSC; high-frequency directional protection; power transmission line; protective relaying; system stability; system transportability; thyristor controlled series capacitor; transmission lines fault location; wavelet transform; Control systems; Failure analysis; Fault location; Power capacitors; Power system protection; Power transmission lines; Propagation losses; Protective relaying; Stability; Thyristors; TCSC; Wavelet Transform; high-frequency directional protection; transmission line protection;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/DRPT.2008.4523786

Filename

4523786