中压电缆终端在线监测及故障预警技术的研究

针对户外环网柜分布广、二作环境恶劣及巡检不便等情况,配合配网自动化,设计研发了中压电缆终端在线监测及故障预警系统.给出了监测系统的结构框图,对其中各部分的设计方法和功能进行了说明.为保证数据采集的可靠性,设计研发了抗干扰、防护等级高、具备自检功能的智能在线监测装置;采用光纤作为通信介质,保证信息传输可靠性;为了实现故障预警技术智能分析,结合实际运行经验,设计了故障预警算法.

Study on the On-line Monitoring and Fault Early-Warning Techniques for Medium Voltage Cable Terminals

Based on the condition of wide distribution, poor working environment and inconvenient inspection of outdoor switchgear cubicles for loop network, an on-line monitoring and fault early-warning system is designed and developed for medium voltage cable terminals in order to assist the distribution network automation. The monitoring system architecture diagram is provided and the design method and function of various parts are described. To ensure the reliability of data acquisition, an anti-interference, high protection grade on-line intelligent monitoring device is developed with self testing capabilities, in which the optical fiber is used as communication medium to ensure the reliability of information transmission. In order to realize the intelligent analysis of fault early-warning techniques, a fault early-warning algorithm is designed based on the practical experiences.