摘要
近期发现南网地区部分输电杆塔塔脚出现严重的腐蚀,经现场调研发现多处出现腐蚀的塔脚都被农田的土壤覆盖,土壤为塔脚腐蚀提供了良好的介质。为了研究腐蚀的杆塔塔脚腐蚀机理,获得实时测量的腐蚀数据十分重要。文中首先开展了塔脚腐蚀监测方法的研究,利用腐蚀电化学原理,提出了一种基于"条形槽"结构的腐蚀监测传感器,并开发了一套数据监测系统。接着对腐蚀监测系统的性能进行测试工作,得到了塔脚腐蚀测量系统在滴水条件、盐雾环境和干湿循环条件下的特性。最后将该系统安装到出现了塔脚腐蚀的现场,测量当地的腐蚀电流。结果表明,现场塔脚腐蚀腐蚀电流在一天内呈上下波动趋势,与温度变化规律接近。在降水过后,腐蚀电流会急剧增大,随后随着时间的推移逐渐下降,因此,腐蚀电流受到温度和土壤含水量的双重影响。综合结果表明腐蚀现场监测系统在监测区域腐蚀性变化方面具有良好的效果。
Recently,it has been found that some of the transmission poles and tower feet of the Southern Power Grid area are severely corroded.Investigations revealed that many of the corroded tower feet were covered by farmland soil,and the soil provided a good medium for tower foot corrosion.In order to study the corrosion mechanism of corroded poles and feet,it is very important to obtain real-time measured corrosion data.This paper firstly carried out the research on the corrosion monitoring method of the tower foot.Using the principle of corrosion electrochemistry,a corrosion monitoring sensor based on"strip groove"structure was proposed,and a set of data monitoring system was developed.Next,the performance of the corrosion monitoring system is tested to obtain the characteristics of the tower foot corrosion measurement system under dripping conditions,salt spray environment,and dry and wet cycling conditions.Finally,install the system to the site where tower foot corrosion occurs,and measure the local corrosion current.The results show that the corrosion current on the site of the tower foot fluctuates up and down within a day,which is close to the temperature change law.After the precipitation,the corrosion current will increase sharply,and then gradually decrease with time.Therefore,the corrosion current is affected by both temperature and soil moisture.The comprehensive results show that the corrosion site monitoring system has a good effect in monitoring the corrosion changes in the area.
作者
陈文灿
孟晓波
张海鹏
杨代铭
梅红伟
王黎明
CHEN Wencan;MENG Xiaobo;ZHANG Haipeng;YANG Daiming;MEI Hongwei;WANG Liming(Tsinghua Shenzhen International Graduate School,Tsinghua University,Guangdong Shenzhen 518055,China;Electric Power Research Institute,CSG,Guangzhou 510663,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第12期196-202,211,共8页
High Voltage Apparatus
基金
国家重点研发计划(2017YFB0902702)
南方电网科学研究院基础性前瞻性项目(SEPRI-K174007)。
关键词
塔脚腐蚀
土壤
传感器
监测系统
corrosion of power transmission tower foots
soil
sensors
monitoring system
