一种识别输电线路单相接地故障下第二个反向行波的方法

发布时间：2018-05-01 01:22

本文选题：行波 + 单相接地故障　；参考：《中国电机工程学报》2016年08期

【摘要】：识别第2个反向行波来自于故障点反射波还是对端母线反射波是单端行波测距和行波测距式距离保护的关键。基于输电线路单相接地故障的交叉透射现象,提出一种不受线路两侧母线结构影响的识别第2个反向行波的新方法。首先利用初始行波与第2个反向行波进行初步测距,判定故障区域;然后根据故障区域确定第2个反向行波的特征波对;最后根据第2个反向行波与其特征波对的极性关系判断第2个反向行波的来源,若第2个反向行波与特征波对的极性相同,则为来自故障点的反射波;若极性相反,则为来自对端母线的反射波。大量EMTP仿真验证了所提方法的可行性和有效性。
[Abstract]:The identification of the second reverse traveling wave from the fault point reflection wave or the opposite end bus reflection wave is the key to single end traveling wave location and traveling wave location type distance protection. Based on the cross-transmission phenomenon of single-phase grounding fault of transmission lines, a new method for identifying the second reverse traveling wave is proposed, which is independent of the bus structure on both sides of the transmission line. First, the initial traveling wave and the second reverse traveling wave are used to determine the fault area, and then the characteristic wave pair of the second reverse traveling wave is determined according to the fault area. Finally, according to the polarity relationship between the second reverse traveling wave and its characteristic wave pair, the source of the second reverse traveling wave is determined. If the polarity of the second reverse traveling wave and the characteristic wave pair is the same, it is the reflected wave from the fault point; if the polarity is opposite, Then the reflected wave from the opposite end bus. A large number of EMTP simulations verify the feasibility and effectiveness of the proposed method.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家自然科学基金重大国际合作项目(51120175001)~~
【分类号】：TM862

【相似文献】