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输电线路杆塔接地状态在线监测技术研究

作者:赵立英 王敏珍

  摘  要: 采用人工方式监测输电线路杆塔接地状态时,存在测量时间较长,无法及时监测故障点的弊端,因此研究一种输电线路杆塔接地状态在线监测方法。分析输电线路杆塔接地在线监测原理,获取故障发生时接地电位与入地电流,修正不同形状接地装置,利用平均电位求出输电线路杆塔接地电阻,再计算加入埋深与降阻剂的输电线路杆塔接地装置电阻,以及考虑4个基础接地电阻并联得到的最终接地电阻;故障检测器中设定电流数值,若通过该输电线路杆塔工频接地电流比设定电流大,则故障指示器提示故障,接地电流短路时,依据差动电路原理通过传感器确认故障杆塔位置。实验结果表明,该方法可准确检测出输电线路杆塔接地电阻与故障点准确位置,监测电阻误差均低于0.1 Ω,监测效率高。

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  关键词: 输电线路; 杆塔; 接地状态; 在线检测; 故障监测; 接地电阻
  中图分类号: TN931+.3?34; TM45                  文獻标识码: A                 文章编号: 1004?373X(2019)12?0100?04
  Abstract: In allusion to the disadvantages of long measurement time and inability to monitor the fault points in time when the manual mode is adopted for grounding state monitoring of the power transmission line tower, a grounding state online monitoring method is researched for the power transmission line tower. The principle of grounding online monitoring is analyzed for the power transmission line tower. The grounding potential and grounding current at fault occurrence are obtained. The grounding devices of different shapes are modified. The grounding resistance of the power transmission line tower is solved by using the average potential. The resistance of the grounding device with buried depth and resistance reducing agent added is calculated for the power transmission line tower. The final grounding resistance is obtained by considering the parallel value of four basic grounding resistors. The current value of the fault detector is set. The fault indicator indicates the fault if the power frequency grounding current passing through the power transmission line tower is larger than the set current. The location of the fault tower is determined by the sensor according to the principle of the differential circuit if the grounding current is short?circuited. The experimental results show that the method can accurately detect the grounding resistance of the power transmission line tower and the accurate location of the fault point, and the resistance monitoring errors are all lower than 0.1 Ω, which indicates that the method has a high monitoring efficiency.
  Keywords: power transmission line; tower; grounding state; online detection; fault monitoring; grounding resistance
  0  引  言
  社会与科技的高速发展大大增加了用电负荷,用电安全逐渐引起人们的重视[1]。输电线路杆塔的接地电阻直接影响着供电系统安全,输电线路杆塔接地电阻越小,抗雷击效果越好,电路受雷击损害致使跳闸的可能性就越小,因此有效的输电线路杆塔接地状态在线监测方法就显得尤为重要[2]。利用在线监测方法时刻监视接地电阻,发现不合格接地电阻应立刻采取应对措施,可极大地增强输电线路供电安全性[3];并且有效输电线路杆塔接地状态在线监测方法可准确快速检测出接地短路点,为电路抢修提供宽裕时间[4]。但是当前通常采用人工方式检测输电线路杆塔接地状态,存在测量时间长、无法及时监测到故障点的弊端。因此,本文提出新的输电线路杆塔接地状态在线监测方法。

相关论文栏目:

  0  引  言
  社会与科技的高速发展大大增加了用电负荷,用电安全逐渐引起人们的重视[1]。输电线路杆塔的接地电阻直接影响着供电系统安全,输电线路杆塔接地电阻越小,抗雷击效果越好,电路受雷击损害致使跳闸的可能性就越小,因此有效的输电线路杆塔接地状态在线监测方法就显得尤为重要[2]。利用在线监测方法时刻监视接地电阻,发现不合格接地电阻应立刻采取应对措施,可极大地增强输电线路供电安全性[3];并且有效输电线路杆塔接地状态在线监测方法可准确快速检测出接地短路点,为电路抢修提供宽裕时间[4]。但是当前通常采用人工方式检测输电线路杆塔接地状态,存在测量时间长、无法及时监测到故障点的弊端。因此,本文提出新的输电线路杆塔接地状态在线监测方法。

输电线路杆塔接地状态在线监测技术研究相关参考属性评定
有关论文范文主题研究:关于杆塔输电论文范文资料大学生适用:7000字硕士学位论文
相关参考文献下载数量:56写作解决问题:写作技巧
毕业论文开题报告:论文提纲、论文结论职称论文适用:期刊发表、高级职称
所属大学生专业类别:输电接地的论文题目推荐度:最新接地监测题目

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