Research And Engineering Application Of RMU Cable Head Temperature Online Monitoring

In the distribution network, RMU is the main equipment of power supply ring network, good economic returns, high reliability, and its health is a key factor to measure the quality of power supply. If the cable joints inside the RMU has high temperature, it can easily lead to cable line fault power outages, equipment damage and other accidents. In this paper, the temperature of the cable head inside the RMU is studied, the implementation scheme of on-line monitoring is determined, so that real-time monitoring inside the cable head operating temperature, rapid processing of the abnormal situation, in order to protect the safe operation of RMU and cable lines.By referring to the relevant literature, this paper first analyzes the method of on-line monitoring for power network equipment temperature, and determines the optimal temperature measurement method based on their respective advantages and disadvantages. Then design the composition structure of RMU cable head temperature monitoring device, develop Implementation strategies according to the three module consists of temperature acquisition transmission and control section and communication transmission and backstage surveillance, the digital temperature sensor is used to collect temperature data, and CC2530 is selected as a wireless transceiver chip with Zigbee wireless transmission function, collect temperature data to the cabinet wireless temperature collector, then borrow fiber communication channel of the distribution automation terminal, uploaded to the distribution automation system background, Finally, add temperature display page on distribution automation WEB browsing system to display temperature data in real time, thus realizing the RMU cable head temperature on-line monitoring.The paper has solved the problem of low efficiency and poor effect of the hand-held infrared temperature measurement, and realized the on-line monitoring of cable head temperature at the same time. RMU cable head temperature monitoring system put into use, bringing to dezhou power company of State Grid significant economic benefits and an effective solution to problems such as failure outage due to cable head high temperature, improving the power supply reliability.