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中文摘要：
提出一种基于双曲正切函数相位特性高压长线路故障测距新算法，其在将故障位置作为已知条件看待并引入参考点与之匹配的思想基础上。构建了一个和双曲正切函数具有相同相位特性的测距函数。根据所取参考点与故障点相匹配时测距函数相位等于零这一特征进行定位。该方法理论上不存在伪根，所需运算量远小于传统方法的运算量．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。EMTDC仿真结果表明．该方法不受过渡电阻、故障位置和故障发生角等因素的影响，在线路参数严重不均匀情况下依然保持较高的测距精度,具有较好的鲁棒性。
英文摘要：
A fault locating algorithm based presented for high voltage long transmission phase characteristics as those of hyperbolic on the phase characteristics lines, which builds a fault tangent function by taking ot hyperbolic tangent tunction is locating function with the same the fault location as the known condition and introducing a reference point to match it. When the reference point matches the fault location,the phase of fault locating function is zero. It has no false root in theory,and with less calculation loads than the traditional algorithms,it effectively avoids the contradiction between precision and speed. Results of EMTDC-based simulation ＂indicate that,it is immune from the transition impedance,fault location, incidence angle,etc.,being high accurate and robust even when the line parameters are seriously asymmetrical.
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