适用于任何具体结构的输电线路精确故障定位

针对输电线路的实际结构，提出了一种适用于任何具体结构的超高压输电线路的精确故障定位方法。该方法 基于模分析理论，采用矩阵特征值和特征向量原理，对多导线波动方程进行矩阵相似变换， 得到互相独立的 模量上的波动方程，分别对每个模量波动方程求解后，将计算结果反变换到相量。该方法很好地克服了输电 线参数实际上的不平衡对故障测距精度的影响，既适用于不换位线路 ，也适用于各种换位线路。计算机数字 仿真试验结果表明，其测距结果十分准确。

AN ACCURATE FAULT LOCATION METHOD SUITABLE FOR EHV TRANSMISSION LINE WITH ANY LINE CONSTRUCTION

The modal analysis theory can be used to calculate the wave equations of polyphase transmission line. On the basis of the principle of eigenvalues and eigenvectors. this theory changes polyphase wave equations into independent modal wave equations. After solving the modal wave equations respectively. the theory changes the results into polyphase conversely.Referring to the real construction of transmission line. this paper presents a fault location method suitable for extra-high voltage transmission line based on the modal analysis theory. This method has solved the influence of the non-equilibrium parameters of transmission line on fault location. It suits not only the untransposed line but also the transposed line. The test results show the accuracy of this fault location method.