Title :
Study on the Improved Transformer Protection Scheme Based on The OCT
Author :
Yan, Xu ; Qing, Liu ; Zengping, Wang
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Baoding
Abstract :
This paper presents a new scheme for transformer differential protection based on the OCT. The scheme can operate reliably when internal faults occurred and do not operate in the condition of external faults, inrush and overexcitation. This scheme combines harmonic restraint and blocking methods with dc content blocking. In this paper, the digital signal processor (DSP) is applied to improve computation and render fast protection feasible. The novel transformer protection system interface construction, hardware structure, software algorithm are discussed. Performance analysis shows its has distinguish advantages over the traditional transformer protection
Keywords :
power engineering computing; power transformer protection; digital signal processor; hardware structure; internal faults; software algorithm; transformer differential protection; transformer protection system interface construction; Circuit faults; Current transformers; Fault currents; Optical saturation; Optical sensors; Power system protection; Power transformer insulation; Power transformers; Surge protection; Transducers;
Conference_Titel :
Transmission and Distribution Conference and Exhibition, 2005/2006 IEEE PES
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-9194-2
DOI :
10.1109/TDC.2006.1668600