Title :
Algorithm for ultra high speed travelling wave protection with accurate fault location
Author :
Gui-bin Zou ; Hou-lei Gao
Author_Institution :
Sch. of Electr. Eng., Shandong Univ., Jinan
Abstract :
Basing fault generated current travelling wave, a novel algorithm implementing ultra high speed protection and fault location for transmission lines is proposed. By applying wavelet transform to the current travelling wave signals measured at two terminals of a protected line, the corresponding modal maxima of the two current signals are obtained. The algorithm uses the polarity relationship between two initial modal maxima to determine whether the fault is internal or not. Simultaneously, the fault location can be easily calculated according to the interval between the two modal maxima. The factors influencing on travelling wave protection and fault location are analyzed and some measures are presented. Extensive simulation results based on EMTDC demonstrate that the algorithm is able to achieve double functions of ultra high speed protection and highly accurate location, which is just required by EHV/UHV transmission systems.
Keywords :
fault location; power transmission faults; power transmission protection; wavelet transforms; EH-UHV transmission systems; accurate fault location; current travelling wave signals; transmission lines; ultra high speed travelling wave protection algorithm; wavelet transform; Fault detection; Fault location; Frequency; Power grids; Power system protection; Power system relaying; Power transmission lines; Protective relaying; Transmission line theory; Wavelet transforms; Travelling wave protection; fault location; modal maximum; wavelet transform;
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2008.4596227