基于可信度加权的线路故障测距方法
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Fault location method for transmission line based on the weighting of reliability
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    摘要:

    提出了一种基于可信度加权的线路故障测距方法。首先利用电抗分量进行单端阻抗测距以减小过渡电阻对测距精度的影响,通过单端阻抗测距结果确定单端行波测距中故障点反射行波到达时刻的大致范围,解决线路后半段故障时单端行波测距无法准确测距的缺陷;再对单端阻抗测距、双端阻抗测距、单端行波测距、双端行波测距进行可性度评估,并加权计算得出综合的测距结果,提高测距精度。可信度评估依据包括线路通道状态、过渡电阻大小、故障位置等。仿真计算表明,文中提出的基于可信度加权的线路故障测距方法鲁棒性强、测距精度高,不受故障类型、线路通道状态等因素影响。

    Abstract:

    A fault location method for transmission line based on the weighting of reliability is proposed. First, reactance component is used to reduce the influence of transition resistance on single-ended impedance location algorithm. Second, using single-ended impedance location algorithm to determine the approximate range of the reflected traveling wave′s arrival time and solving the problem that single-ended traveling wave location algorithm can not accurately locate the fault in the second half of the line. Third, evaluating the reliability of single-ended impedance location algorithm, double-ended impedance location algorithm, single-ended traveling wave location algorithm and double-ended traveling wave location algorithm. The reliability evaluation criteria includes channel state, transition resistance, fault location and so on. Finally, the final fault location result is obtained based on the weighting of reliability. The simulation results show that the proposed fault location method has strong robustness and high accurate. It will not be affected by the factors such as fault type and line channel status.

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赵青春,徐晓春,陆金凤,陈玉林,朱晓彤.基于可信度加权的线路故障测距方法[J].电力工程技术,2019,38(2):163-168

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历史
  • 收稿日期:2018-11-07
  • 最后修改日期:2018-12-11
  • 录用日期:2018-09-03
  • 在线发布日期: 2019-03-28
  • 出版日期: 2019-03-28