摘要
高压电缆及其附件的PD(局部放电)直接影响着电力电缆的绝缘性能。因此,提出一种基于FDTD(时域有限差分)建模的高压电缆PD检测方法。首先,将FDTD方法与传递函数理论引入电缆PD检测,建立高压电缆的FDTD模型,并评估了该模型的准确性。然后,获取了11 kV XLPE(交联聚乙烯)电缆FDTD模型中用于激发PD事件的原始脉冲,详细阐述了PD检测混合建模的相关步骤。最后,对脉冲注入试验的有限元计算结果展开分析,验证了所提出方法的有效性。该方法也适用于EPR(乙烯-丙烯共聚物)电缆和纸绝缘等其他电缆的PD检测,有助于研究PD信号与PD源激发信号之间的关系。
The partial discharge(PD)of high-voltage cables and the accessories directly affects the insulation per⁃formance of power cables.Therefore,a PD detection method for high-voltage cables based on finite-difference timedomain(FDTD)modeling is proposed.First,the FDTD method and the theory of transfer function are introduced into the cable PD detection.Besides,the FDTD model of high-voltage cables is established,and the accuracy of the model is evaluated.Then,the original pulses used to excite PD events in the FDTD model of 11 kV XLPE(crosslinked polyethylene)cables are obtained,and the relevant steps of hybrid modeling for PD detection are elaborated.Finally,the finite element calculation results of the pulse injection test are analyzed to verify the effectiveness of the proposed method.The method,also applicable to the PD detection of EPR(ethylene propylene rubber)cables,paper-insulated cables,and other cables,helps to study the relationship between the PD signals and the excitation signals of PD sources.
作者
潘彪
周永涛
董秦龙
郑会
钱迪
叶子雍
PAN Biao;ZHOU Yongtao;DONG Qinlong;ZHENG Hui;QIAN Di;YE Ziyong(China Oil&Gas Pipeline Network Corporation,Beijing 100101,China;College of Electrical Engineering and New Energy,China Three Gorges University,Yichang,Hubei 443000,China)
出处
《浙江电力》
2023年第12期12-19,共8页
Zhejiang Electric Power
基金
国家自然科学基金项目(61876097)。
关键词
高压电缆
局部放电
高频电流互感器
传递函数
有限元计算
high-voltage cable
PD
high-frequency current transformer
transfer function
finite element calculation
