基于电弧特性的特高压输电线路单相自适应重合闸  

Single-phase adaptive auto-reclosure of EHV transmission line based on the arc characteristic

作　　者：程玲[1] 徐玉琴[1] 宋秭霖[2] 

机构地区：[1]华北电力大学电力工程系,河北保定071003 [2]国家电网公司宜昌超高压管理处江陵换流站,湖北宜昌443005

出　　处：《继电器》2007年第22期18-22,共5页Relay

摘　　要：提出了一种基于电弧特性的特高压线路单相自适应重合闸方案。通过EMTP-ATP软件中的MODELS模块建立二次电弧模型,模拟了瞬时故障时二次电弧的反复燃烧-熄灭-重燃的过程。利用数学形态学的多分辨形态学梯度提取故障相母线电压信号的暂态分量,通过比较故障相母线电压谱能量的差异来判别瞬时性与永久性故障。EMTP仿真数据都证明该方案能准确地区分故障类型,可靠地实现自适应重合闸。A novel method based on the arc characteristic for single-phase self-adaptive reclosuer on ultra high voltage transmission line is presented in this paper. Building up secondary arc model through the MODELS modular of EMTP-ATP, this paper simulates that the secondary arc repeatedly burn and extinguish when transient fault occurs. It extracts the busbar transient voltage signal using the multi-resolution morphological gradient of the mathematic morphological, the differential spectrum energy of voltage can be used to determine whether the fault is permanent or transient.EMTP simulation data shows that this method can identify the fault narture and correctly implement the self-adaptive reclosure.

关 键 词：单相自适应重合闸 二次电弧 瞬时故障与永久故障识别 数学形态学 多分辨形态学梯度 EMTP仿真 

分 类 号：TM762.2[电气工程—电力系统及自动化]