基于高漏抗式消弧线圈的配电网单相接地故障状态辨识  

Identification of Distribution Network's Grounding Status Based on Transformer-Based Arc Suppression Coil

作　　者：刘味果[1] 赵邈[1] 毛柳明[1] 周恒逸[1] 

机构地区：[1]国网湖南省电力公司电力科学研究院,长沙410007

出　　处：《电工技术学报》2015年第3期28-35,共8页Transactions of China Electrotechnical Society

摘　　要：在谐振接地配电网中,防止在接地故障消失后消弧线圈与系统对地电容发生串联谐振,是一个值得关注的问题。预防发生串联谐振的关键在于能否准确识别配电网单相接地状态的变化,本文在高漏抗式消弧线圈的基础上提出一种识别系统接地状态的方法,称为频率跟踪算法。研究接地故障消失时,高漏抗式消弧线圈在不同的晶闸管导通角度对系统暂态零序电压的影响。利用跟踪零序电压频率来辨识接地故障状态,在接地故障动态模拟高压试验室中进行模拟试验,并分析了频率跟踪算法辨识接地故障状态的方法在实际现场的应用情况。In the resonant-grounded distribution network, series resonance between the Peterson coil and the network zero-sequence capacitance after an arc incident presents great danger to the safe operation of the network. The key to solve this problem is to identify the exact arc extinguishing time. Based on the principles of transformer-based arc suppression coil(TASC), this paper introduces an arc extinguishing timing identification method, namely, frequency tracking method. The relationships between the thyristor's triggering angle of the TASC and the frequency of the neutral point voltage is utilized in this proposed method. Laboratory and field tests were carried out to verify the proposed method.

关 键 词：谐振接地 接地故障 高漏抗式消弧线圈 频率跟踪算法 晶闸管 

分 类 号：TM862[电气工程—高电压与绝缘技术]