基于参数估计的同杆双回单线故障测距

线路参数在故障测距算法中有重要的作用。线路参数给定值与实际值不符是造成测距误差的一个重要原因。在实际运行中,输电线路参数受诸多因素的影响,如环境、同杆双回线路间互感等等。为了消除因线路参数变化对故障测距精度的影响,采用最小二乘法对线路参数进行预先估计,并在此基础上提出一种基于参数估计的同杆双回线路故障测距新算法。该算法能有效消除因线路参数不准确而造成的测距误差,实现了在线路参数未知情况下的精确故障测距。

The Fault Location of the One Pole Two-circuit Single-wire Based on the Parameter Estimation

Line parameters play an important role in line fault location algorithm.The given values of the line parameters that do not conform with the actual values are an important factor which cause range errors.During the operation,the line parameters may be influenced by many factors such as environment and inductance etc.In order to eliminate the effect of the fault location accuracy because of the line parumeter changes,the least square is used to beforchand estimate the parameters.A new fault location algorithm based on the parameter estimation has been proposed on the basis of this.The algorithm can effectively eliminate the range errors because of the line parameters which are not accurate,achieving accurate fault location of the unknown line parameters.