直流线路诊断中雷击暂态全响应监测实践  

Practice of Lightning Transient Full Response Monitoring in DC Line Diagnosis

作　　者：沈祖成 SHEN Zu-cheng(State Grid Zhangjiajie Power Supply Company,Zhangjiajie 427000)

机构地区：[1]国网湖南省电力有限公司张家界供电分公司,张家界427000

出　　处：《导航与控制》2021年第6期111-116,共6页Navigation and Control

摘　　要：由于传统方法特征辨识度不高,且无法有效提高实时监测能力,为此提出了直流线路诊断中雷击暂态全响应监测方法。构建暂态全响应信号检测模型,结合自相关匹配滤波器检测方法对雷击暂态特征进行分解和抗干扰设计,并在特征分解后提取特征分量,建立静止无功补偿控制模型,通过正交调制和多径特征分解的方法实现了对直流线路诊断中雷击暂态全响应检测。仿真结果表明,采用该方法输出稳定性较高,抗干扰能力较强,对线路故障的准确检测概率较高。Due to the low recognition degree of the traditional methods and the inability to effectively improve the real-time monitoring ability,a lightning transient full response monitoring method for DC line diagnosis is proposed.The detection model of transient full response signal is constructed.Combined with the detection method of autocorrelation matched filter,the transient characteristics of lightning stroke are decomposed and anti-interference is designed.After the feature decomposition,the characteristic components are extracted,and the static var power compensation control model is established.Through orthogonal modulation and multi-path feature decomposition,the lightning transient full response detection in DC line diagnosis is realized.The simulation results show that this method has high output stability,strong anti-interference ability and high detection probability of line fault.

关 键 词：直流线路诊断 雷击暂态全响应 静止无功补偿控制 冲激响应 特征分量 

分 类 号：TM77[电气工程—电力系统及自动化]