摘要
提出了一种基于双曲正切函数相位特性同杆双回线非同步故障测距新原理。根据所取参考点与故障点相匹配时双曲正切函数相位过零这一特征进行定位。该方法理论证明了非同步故障时可利用对侧反向正序电流相位来同步校正该侧反向正序电流相位,无需通过数据移动来同步匹配两侧信息。原理上不存在伪根问题,对非线性电阻故障具有良好的适用性,所需运算量小,能有效克服传统方法存在的测距精度和测距速度此消彼长的矛盾。PSCAD/EMTDC软件仿真验证了此方法的正确性和有效性。
This paper put forward a kind of new asynchronous fault location principle of parallel transmission lines based on hyperbolic tangent function phase characteristics. According to the characteristic that the hyperbolic tangent function phase equals to zero when the reference point matched the fault position, the fault location was carried out. It is concluded that the function has different phase characteristics between the reference point located at the lett of fault position and the reference point located at the fight of fault position. The presented algorithm has less calculation burden, and the accuracy is independent of fault transition impe ＇dance and its property, fault type, fault position and load current. The fault location function has no false root in theory. Results of PSCAD/EMTDC based on simulation indicate that the presented method is correct and effective.
出处
《电工电气》
2012年第2期18-22,共5页
Electrotechnics Electric
关键词
相位特性
反向网
测距函数
同杆双回线
非同步数据
phase characteristic
differential component net
fault location function
parallel transmission lines
asynchronous data
