State Assessment for the Grounding Grid of an 110 kV Old Substation Before Reconstruction
摘 要
为提高变电站接地网改造效率,采用电阻抗成像(EIT)技术对某110 kV老旧变电站开展接地网改造前状态评估,并对地网建模成像。检测发现,除目视可见断点外,接地网引下线存在5处隐蔽断点,急需处理;而水平地网所处土壤腐蚀性弱,各支路阻抗值增幅均在允许范围,未出现明显锈蚀。据此,为该变电站制定了仅更换引下线、不改造水平地网的个性化维修方案,显著降低改造成本、避免接地材料浪费。电阻抗成像技术可实现对接地网腐蚀的快速准确诊断,将接地网从"黑箱状态"转变为"可视状态",改善接地网腐蚀检查的盲目性,提升设备管理水平。
Abstract
In order to improve the reconstruction efficiency, the grounding grid of an 110 kV substation was evaluated by the electrical impedance tomography (EIT) technology. Results indicated that five breakpoints of the down lines were found underground, but the impedance increase of grid was in a reasonable scope, proving that the level ground grid had not suffered serious corrosion. According to the evaluation results, a reconstruction program of just replacing the grounding metal of down lines was proposed, which could reduce the reconstruction cost of grounding grid and the waste of grounding metal. EIT technology could be used to evaluate the corrosion of grounding grid rapidly and effectively, which could reduce the blindness of grounding grid corrosion detection and improve the fine management level of grounding apparatus.
中图分类号 TM862 DOI 10.11973/fsyfh-201711013
所属栏目 应用技术
基金项目 国网浙江省电力公司科技项目(5211DS16001N;5211DS14005D)
收稿日期 2017/1/23
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: HU Jiayuan,ZHENG Defu,SHEN Xiaoming,XU Penglai,LI Yanwei,CAO Qiuyang. State Assessment for the Grounding Grid of an 110 kV Old Substation Before Reconstruction[J]. Corrosion & Protection, 2017, 38(11): 880
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】肖磊石,张波,李谦,等. 分布式等电位接地网与变电站主接地网连接方式[J]. 高电压技术,2015,41(12):4226-4232.
【2】陈建伟,钱洲亥,祝郦伟,等. 电化学噪声在接地网土壤腐蚀监控中的应用[J]. 腐蚀与防护,2016,37(5):371-374.
【3】REN Z,YANG D,LIU J,et al. The protection of 500 kV substation grounding grids with combined conductive coating and cathodic protection[J]. Anti-Corrosion Methods and Materials,2015,62(2):83-87.
【4】马文婧. 接地网腐蚀的诊断方法研究[D]. 吉林:东北电力大学,2013.
【5】中国电力企业联合会. DL/T475-2006接地装置特性参数测量导则[S].
【6】刘洋,崔翔,赵志斌,等. 基于电磁感应原理的变电站接地网腐蚀诊断方法[J]. 中国电机工程学报,2009,29(4):97-103.
【7】YU C G,FU Z H,HOU X Z,et al. Break-point diagnosis of grounding grids using transient electromagnetic apparent resistivity imaging[J]. Transactions of China Electrotechnical Society,2014,30(6):2485-2491.
【8】刘渝根,尚龙龙,冷迪,等. 基于连续性遗传算法的接地网腐蚀诊断优化[J]. 高电压技术,2016,42(5):1503-1510.
【9】钱洲亥,何为,祝郦伟,等. 一种基于无线通信的多通道接地网支路阻抗测量装置:CN204241571U[P]. 2015-05-27.
【10】ZHANG R Q,HE W,LI Y,et al. Studies on substation ground grids from the perspective of primary and inverse problems[J]. Proceedings of the Chinese Society of Electrical Engineering,2014,34(21):3548-3560.
【11】牛涛,罗先觉,王森,等. 接地网腐蚀故障诊断可测性分析[J]. 电工技术学报,2010,25(6):192-198.
【12】ZHANG P H,HE J J,ZHANG D D,et al. A fault diagnosis method for substation grounding grid based on the square-wave frequency domain model[J]. Metrology and Measurement Systems,2012,19(1).
【13】中国电力企业联合会. DL/T1532-2016接地网腐蚀诊断技术导则[S]. 北京:中国标准出版社,2016.
【14】裴锋,田野,刘平,等. Q235碳钢在红壤中的腐蚀行为[J]. 腐蚀与防护,2016,37(9):715-719.
【2】陈建伟,钱洲亥,祝郦伟,等. 电化学噪声在接地网土壤腐蚀监控中的应用[J]. 腐蚀与防护,2016,37(5):371-374.
【3】REN Z,YANG D,LIU J,et al. The protection of 500 kV substation grounding grids with combined conductive coating and cathodic protection[J]. Anti-Corrosion Methods and Materials,2015,62(2):83-87.
【4】马文婧. 接地网腐蚀的诊断方法研究[D]. 吉林:东北电力大学,2013.
【5】中国电力企业联合会. DL/T475-2006接地装置特性参数测量导则[S].
【6】刘洋,崔翔,赵志斌,等. 基于电磁感应原理的变电站接地网腐蚀诊断方法[J]. 中国电机工程学报,2009,29(4):97-103.
【7】YU C G,FU Z H,HOU X Z,et al. Break-point diagnosis of grounding grids using transient electromagnetic apparent resistivity imaging[J]. Transactions of China Electrotechnical Society,2014,30(6):2485-2491.
【8】刘渝根,尚龙龙,冷迪,等. 基于连续性遗传算法的接地网腐蚀诊断优化[J]. 高电压技术,2016,42(5):1503-1510.
【9】钱洲亥,何为,祝郦伟,等. 一种基于无线通信的多通道接地网支路阻抗测量装置:CN204241571U[P]. 2015-05-27.
【10】ZHANG R Q,HE W,LI Y,et al. Studies on substation ground grids from the perspective of primary and inverse problems[J]. Proceedings of the Chinese Society of Electrical Engineering,2014,34(21):3548-3560.
【11】牛涛,罗先觉,王森,等. 接地网腐蚀故障诊断可测性分析[J]. 电工技术学报,2010,25(6):192-198.
【12】ZHANG P H,HE J J,ZHANG D D,et al. A fault diagnosis method for substation grounding grid based on the square-wave frequency domain model[J]. Metrology and Measurement Systems,2012,19(1).
【13】中国电力企业联合会. DL/T1532-2016接地网腐蚀诊断技术导则[S]. 北京:中国标准出版社,2016.
【14】裴锋,田野,刘平,等. Q235碳钢在红壤中的腐蚀行为[J]. 腐蚀与防护,2016,37(9):715-719.
相关信息