Title :
Detecting fault during power swing for a series compensated line
Author :
Nayak, Paresh Kumar ; Pradhan, Ashok Kumar ; Bajpai, Prabodh
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Kharagpur, Kharagpur, India
Abstract :
The apparent impedance seen by a distance relay may fall within its operating zone during power swing. This may cause the relay to trip unnecessarily. To avoid unintended trip operation during such conditions, a power swing blocking function is utilized in distance relays. However, if a fault occurs during power swing, the relay should detect the fault and trip as soon as possible for maintaining security. Detection of fault during power swing in a series compensated line is more complicated due to the presence of protection circuit of the capacitor. This paper proposes a negative sequence current based technique for detecting fault during power swing in a series compensated line. The technique is tested for symmetrical and unsymmetrical faults in a system simulated through EMTDC/PSCAD. The method is compared with available techniques.
Keywords :
capacitors; fault location; power cables; power system faults; power system protection; power system security; relays; EMTDC-PSCAD; capacitor; distance relay; negative sequence current based technique; operating zone; power swing blocking function; protection circuit; security maintainance; series compensated line; symmetrical fault detection; unintended trip operation; unsymmetrical fault detection; Circuit faults; Fault detection; Impedance; Power transmission lines; Protective relaying; Resistance; Digital relaying; Distance protection; Fault detection; Power swing; Series compensation;
Conference_Titel :
Energy, Automation, and Signal (ICEAS), 2011 International Conference on
Conference_Location :
Bhubaneswar, Odisha
Print_ISBN :
978-1-4673-0137-4
DOI :
10.1109/ICEAS.2011.6147076