安科瑞 于洋

       摘要：温度是表征电力一次设备运行正常的一个重要参数。随着用电量的急剧增长，为了满足用电需求，变电站的开关柜等高低压设备长期运行在线状态，过负荷运行会导致一次设备的发热及过热，这一现象在负荷增长较快的地区显得尤为普遍。这些情况如不及时得到监控，及时处理，都将发生不可预测的大事故。通过对开关柜温度的实时监测，即可知道开关柜运行工况，通过电网信息资源整合，就可为状态检修提供强有力的依据因此，进行安全温度监测及智能化控制是非常有必要的。

      Abstract: temperature is an important parameter to characterize the normal operation of power primary equipment. With the rapid growth of power consumption, in order to meet the power demand, high and low voltage equipment such as switchgear in substation operate online for a long time. Overload operation will lead to heating and overheating of primary equipment. This phenomenon is particularly common in areas with rapid load growth. If these situations are not monitored and handled in time, unpredictable accidents will occur. Through the real-time monitoring of the switch cabinet temperature, we can know the operating conditions of the switch cabinet. Through the integration of power grid information resources, we can provide a strong basis for condition based maintenance. Therefore, it is very necessary to carry out safe temperature monitoring and intelligent control.

  关键词：电气接点、配电室、无线测温

       Key words: electrical contact, distribution room, wireless temperature measurement

  1、概述

  变电站母线、电缆、断路器等运行设备由于长期工作在高电压、大电流环境条件下，对各设备温度的监测维护是保证电网可靠工作必不可少的环节。尤其是高压开关柜、组合电器等封闭式运行设备，自身散热条件较差，而且依靠人工定期测温的方法很难完成对柜内设备温度的直接测量和在线监测。由于缺乏行之有效的设备温度在线监测预警系统，近年来关于变电站内设备运行温度过高造成的火灾事故时有报道，严重影响电网供电可靠性，同时也给电力企业造成了较大的经济损失甚至是人身伤亡。

  中航光电科技股份有限公司是中国航空工业集团公司控股的股份制企业，在航空、航天、舰船、兵器、铁路、电子、通讯、电力、电源等军用、民用领域得到广泛应用，确保了国家众多项目的顺利完成。稳定、可靠的电力系统，是企业发展的重要保障， 因此，采用合理且数据可靠的温度检测技术对互感器、母线、电缆及动作开关触头等易发热部位进行温度实时在线监控，及时发现设备运行温度异常隐患并实现异常告警，对于保证变电站设备可靠运行具有十分重要的意义。

      1. Overview

   due to the long-term operation of substation buses, cables, circuit breakers and other operating equipment under high voltage and high current environment, the monitoring and maintenance of the temperature of each equipment is an essential link to ensure the reliable operation of the power grid. In particular, closed operating equipment such as high-voltage switchgear and combined electrical appliances have poor heat dissipation conditions, and it is difficult to complete direct measurement and on-line monitoring of equipment temperature in the cabinet by relying on manual periodic temperature measurement. Due to the lack of effective equipment temperature on-line monitoring and early warning system, fire accidents caused by excessive equipment operating temperature in substation have been reported in recent years, which not only seriously affects the power supply reliability of power grid, but also causes great economic losses and even personal casualties to power enterprises.

     AVIC Optoelectronics Technology Co., Ltd. is a joint-stock enterprise controlled by China Aviation Industry Corporation. It has been widely used in military and civil fields such as aviation, aerospace, ships, weapons, railways, electronics, communications, electric power and power supply, ensuring the smooth completion of many national projects. A stable and reliable power system is an important guarantee for the development of enterprises. Therefore, a reasonable and reliable temperature detection technology is adopted to conduct real-time online temperature monitoring on the easily heated parts such as transformer, bus, cable and action switch contact, so as to timely find the hidden danger of abnormal equipment operating temperature and realize abnormal alarm, It is of great significance to ensure the reliable operation of substation equipment.