考虑频变参数补偿算法的长线距离保护

JIAO Zaibin; YANG Liming; SONG Guobing; YAO Xu; SUONAN Jiale

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考虑频变参数补偿算法的长线距离保护

更新时间：2025-08-13

- 考虑频变参数补偿算法的长线距离保护
- Automation of Electric Power Systems Vol. 37, Issue 2, Pages: 102-107(2013)
- 作者机构：
  
  1. 西安交通大学电气工程学院,陕西省,西安市,710049
  2. 甘肃省电力公司调度通信中心,甘肃省,兰州市,730050
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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JIAO Zaibin, YANG Liming, SONG Guobing, et al. [J]. Automation of electric power systems, 2013, 37(2): 102-107.
DOI：

JIAO Zaibin, YANG Liming, SONG Guobing, et al. [J]. Automation of electric power systems, 2013, 37(2): 102-107. DOI：

摘要

特高压长距离输电线路的测量阻抗与故障距离不成正比，并且故障暂态过程中谐波丰富，只有计及频变参数的影响，长输电线路距离保护才能够正确地反映故障点位置。为此，根据传输线路方程，在分布参数模型的基础上构造补偿矩阵，利用有限脉冲响应滤波器描述线路频变参数特性。实际应用中，新的距离保护原理由保护安装处的测量电压和电流，利用长距离传输线路精确数学模型计算整定点处的电压和电流，并以此为观测点构造距离保护。仿真结果表明，所提出的算法能够在时域里快速、准确地识别故障位置，有效提高了长线距离保护的性能。

Abstract

The distributing and frequency-dependent parameter characteristics of ultra-high voltage（UHV）long transmission lines lead to the nonlinear relationship between the measured impedance of conventional distance protection and fault distance.The harmonics are remarkable in the early failure period，and only if the frequency-dependent parameter characteristics are considered，the long transmission line distance protection could action correctly.A new distance protection case that considering the frequency-dependent parameters is proposed.Based on electromagnetic field theory and long transmission equations，the calculation of voltage and current in frequency-dependent parameters transmission line is decomposed to the calculation in distributing parameters transmission line and the concatenation of a compensation algorithm，which could be transformed to a finite impulse response（FIR）filter.According to this，the voltage and current of the terminal of the distance section could be calculated from the measuring point，and the distance protection can be set by the fault location.Simulation results show that this new method is fast and accurate in both time domain and action.

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Related Institution

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