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PPT |多引下线输电杆塔接地电阻在线监测

  • 2026-11-03 14:00:33
PPT |多引下线输电杆塔接地电阻在线监测
01
多引下线输电杆塔接地电阻在线监测关键技术及数智化运维研究
1. 工作与研究背景
  • 需求迫切性:杆塔接地装置是防雷关键,山区接地不良易导致雷击跳闸。传统依赖雷雨季节前的人工测量,存在滞后性。
  • 痛点分析(远、险、散、贵、假、火):
  • 作业环境恶劣:山路崎岖、路途遥远,且存在滑坡、蛇虫猛兽等人身安全风险。
  • 效率与成本矛盾:人工成本高、频率低,数据分散难以形成趋势预判,不符合智能运维发展趋势。
  • 质量与防火风险:受人为因素影响大,准确性差异大;检测期与山区防火期重叠,隐患突出。
2. 思路与关键原理
  • 总体思路转变:
  • 从“人工离线检测”转向“在线实时监测”,实现全周期全景监控。
  • 从“整体测量”发展为“分体诊断”,在每根引下线上独立部署传感器。
  • 从“单参数测量”提升为“多参数融合监测”,结合气象、土壤等多维数据。
  • 从“检测超标”智能转向“趋势预警”,利用AI模型提前发现劣化趋势。
  • 核心技术原理:
  • 双线圈法测量:采用电磁感应法,通过发射线圈注入激励电流,接收线圈感应回路电流,无需切断电源或辅助极,实现非接触式在线测量。
  • 多重保障体系:具备光伏+锂电三重电源保障、4G+LoRa双通道通信及IP68级防护设计,适应极端山区环境。
3. 现场实施与应用
  • 设备部署方案:
  • 集成装置:集成了接地电阻监测、气象(风/雨/温/湿)、杆塔姿态、腐蚀及雷电监测等6大类15小类传感器。
  • 安装布局:CT线圈安装于塔身引下线,地面布置集成机箱与太阳能供电板。
  • 通信传输架构:
  • 双通道冗余:主用4G-DTU全网通,备用LoRa自组网(覆盖盲区)。支持毫秒级自动切换。
  • 数据安全:采用MQTT+JSON协议,TLS 1.3加密,符合国网Q/GDW标准。具备断网本地缓存功能,确保数据不丢失。
  • 系统架构与多元应用:
  • 分层架构:分为终端感知层、通信传输层和平台应用层。
  • 健康综合研判逻辑:基于15类监测数据,经过季节修正与特征构建,进行6维加权评分(接地性能、引下线状态、腐蚀状况等)与交叉诊断规则推理,输出健康等级与三级预警。
  • 趋势预测算法:采用“季节修正-双分量分解-外推”算法,消除环境干扰,精准预测未来3-6个月的超标日期。
  • 检修决策闭环:根据健康度与预警等级生成分级检修策略(紧急、计划、预防、正常),自动生成工单并推送,实现“状态检修”。
4. 数智化应用前景
  • 提升安全与降低风险:大幅减少人员上山频次,规避陡峭山路及生物危害带来的安全风险。
  • 数据资产价值:积累的海量多维数据可用于区域特征分析、季节规律建模及设备健康度评估,支撑行业标准制定。
  • 降本增效显著:
  • 降本:初始投资约2万元/基,10年寿命期内相比传统方式每基可节省检测费用约3万元。
  • 增效:减少无效开挖与重复巡检,报告一键生成,提升运维效率。
  • 行业与社会价值:推动行业标准制定,助力新型电力系统建设及“双碳”目标实现,具备向“一带一路”沿线国家输出的潜力。
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