Research on Abnormal Identification Technology of Circuit Breaker extinction based on wavelet analysis

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Ni, Ting^1 ; Zhao, Kuo^1 ; Liu, Zhao^1 ; Hu, Lang^1

Jiangjin Urban Power Supply Branch of State Grid Chongqing Electric Power Company, Chongqing

400010, China^1

关键词: Abnormal expansion;    Current mutations;    Fault characteristics;    High frequency characteristics;    Identification technology;    Key characteristics;    Operation mode conversions;    Power network faults;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032088/pdf
DOI  :  10.1088/1755-1315/252/3/032088

来源: IOP

【 摘 要 】

Circuit breaker is the actuator of power network fault removal and operation mode conversion. If the circuit breaker itself cannot complete the breaking operation, it may cause the accident impact range to expand, or even cause more serious chain failure. The fault phase current is decomposed based on wavelet analysis and Fourier transform, and the unstructured recorded wave data is converted into structured fault characteristic quantity to realize the analysis of current mutation characteristics. The high frequency characteristic singular value at the occurrence of arc is obtained by wavelet transform, which provides the key characteristic quantity for the identification of abnormal arc extinguishing performance of circuit breaker and realizes the identification of abnormal arc extinguishing state of circuit breaker. Issue an alarm before abnormal expansion of circuit breaker or adverse impact, remind relevant personnel to timely check and deal with defects, reduce the occurrence of abnormal tripping circuit breaker phenomenon.