输电线路杆塔接地状态在线监测技术探索  

Exploration of Online Monitoring Technology for Grounding Status of Transmission Line Poles and Towers

作　　者：王麟超 邱海波 WANG Linchao;QIU Haibo(Shandong Electric Power Ultra High Voltage Company,Yantai 264000,China)

机构地区：[1]国网山东省电力公司超高压公司,山东烟台264000

出　　处：《通信电源技术》2024年第6期38-40,44,共4页Telecom Power Technology

摘　　要：接地保护措施是确保输电线路安全供电的关键环节。目前,电网系统大多依赖人工方式来监测杆塔接地情况,但在险峻地形和恶劣天气条件下,人工测量存在较多不便,且测量步骤烦琐,难以及时发现故障点,因此研究智能化实时监测技术成为迫切需求。因此,文章提出一种输电线路杆塔接地状态在线监测方法,通过测量故障出现点的接地电位和入地电流,归一化处理形态各异的接地模式,并利用平均电位计算接地电阻。同时,通过比较故障检测装置中的电流阈值与杆塔接地电流,可以判断接地是否出现故障。实证分析表明,该方法能够较为准确地判断接地电阻和故障部位,且具有较高的准确性。该研究不仅有助于提升电网输电线路的安全性,还为智能化实时监测技术的发展提供有益的探索。Grounding protection measures are the key links to ensure the safe power supply of transmission lines.At present,the grid system mostly relies on manual methods to monitor the tower grounding condition,but in the treacherous terrain and bad weather conditions,manual measurement has more inconveniences,and the measurement steps are cumbersome,which makes it difficult to find the fault point in time,so the study of intelligent real-time monitoring technology has become an urgent need.Therefore,an online monitoring method of transmission line tower grounding status is proposed,in which the grounding patterns with different morphologies are normalized by measuring the grounding potential and the inlet current at the point where the fault occurs,and the average potential is used to calculate the grounding resistance.At the same time,by comparing the current threshold in the fault detection device with the tower grounding current,it is possible to determine whether the grounding is faulty.Empirical analysis shows that the method can more accurately determine the grounding resistance and fault location with high accuracy.This study not only helps to improve the safety of power grid transmission lines,but also provides a useful exploration for the development of intelligent real-time monitoring technology.

关 键 词：输电线路 杆塔 接地状态 在线检测 

分 类 号：TM75[电气工程—电力系统及自动化]