摘要
在已设计的高压导体金属突出物缺陷物理模型的基础上,针对GIS局部放电超高频内置传感器检测的该缺陷产生的局放信号波形,采用数据拟合方法建立了用于仿真研究的数学模型。通过拟合误差、MUSCI功率谱和FFT频域分析,证明了所构建数学模型的正确性,并给出了该数学模型参数。最后验证了运用复小波变换技术在白噪声中可以提取该数学模型的超高频局放仿真信号。
Mathematical model is established and studied for partial discharge (PD) in Gas Insulated Switchgear (GIS) using ultra-high frequency (UHF) method, which is based on physical model of metallic outshoot insulation defect and UHF inner-loop sensor. The parameters of the mathematical model are given according to data fitting method, and the validity of PD mathematical model in UHF is proved by fitting error, power spectrum and FFT analysis. In the end, the PD mathematical model in UHF can be extracted among whitenoise using complex wavelet transform.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第19期106-110,共5页
Proceedings of the CSEE
基金
国家自然科学基金资助项目(50377045)重庆市攻关项目(7795)。~~
关键词
气体绝缘开关
局部放电
超高频
数学模型
复小波
GIS
Partial discharge
Ultra-high frequency(UHF)
Mathematical model
Complex wavelet transform