Title :
A protection scheme for phase-to-phase faults based on spectrum characteristic of fault-generated high-frequency transient signals
Author :
Huang, S.F. ; Wang, X.G.
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Beijing, China
Abstract :
When a fault occurs on a transmission line, fault-generated high-frequency signals contains a lot of information about fault. This paper proposes a protection scheme for phase-to-phase fault in transmission line based on spectrum characteristic of fault-generated high-frequency signals. The difference of fundamental natural frequencies in both ends of transmission line is used to determine whether a fault is internal or external. The scheme can reduce trip time if the fault is an internal fault and does not misoperate if the fault is external. It also can identify chose-up faults. The scheme performance was proven using Power System Computer Aided Design (PSCAD) in 500-kV power system considering critical fault cases.
Keywords :
CAD; power engineering computing; power system faults; power transmission lines; PSCAD; fault-generated high-frequency transient signals; internal fault; phase-to-phase faults; power system computer aided design; spectrum characteristic; transmission line; voltage 500 kV; Bandwidth; Fault detection; Fault diagnosis; Frequency domain analysis; Frequency measurement; PSCAD; Power system protection; Power system transients; Power transmission lines; Voltage; Internal and external fault; natural frequency; phase-to-phase fault; protection; spectrum; transient signals; transmission line;
Conference_Titel :
Power & Energy Society General Meeting, 2009. PES '09. IEEE
Conference_Location :
Calgary, AB
Print_ISBN :
978-1-4244-4241-6
DOI :
10.1109/PES.2009.5275917