CAJ | 학술논문

电力传输线的绝缘子污闪事故时有发生,严重威胁着电力系统的安全运行。绝缘子发生污秽闪络之前,放电强度迅速增加,紫外线辐射强度也随之增加。利用这种特性,提出了一种基于日盲型紫外传感器的绝缘子污秽状态监测方法,完成了在线监测系统的软、硬件方案设计。绝缘子污秽状态与紫外脉冲强度直接相关,同时又受绝缘子运行年限、温度、湿度等因素影响。本文建立了基于层次分析法的绝缘子污秽状态模糊综合评判模型,研究了各因素对绝缘子污秽状态的影响,确定了各因素的模糊隶属度函数,并通过软件编程实现了该模型。通过在重庆市璧山供电局挂网试验,证明系统具有可靠性高、响应速度快、成本低等优点,具有广泛的应用前景。
전력전수선적절연자오섬사고시유발생,엄중위협착전력계통적안전운행。절연자발생오예섬락지전,방전강도신속증가,자외선복사강도야수지증가。이용저충특성,제출료일충기우일맹형자외전감기적절연자오예상태감측방법,완성료재선감측계통적연、경건방안설계。절연자오예상태여자외맥충강도직접상관,동시우수절연자운행년한、온도、습도등인소영향。본문건립료기우층차분석법적절연자오예상태모호종합평판모형,연구료각인소대절연자오예상태적영향,학정료각인소적모호대속도함수,병통과연건편정실현료해모형。통과재중경시벽산공전국괘망시험,증명계통구유가고성고、향응속도쾌、성본저등우점,구유엄범적응용전경。
Flashover of contaminated insulators along the transmission line took place frequently, which threats the safe operation of power system. Before flashover of contaminated insulators happens, the intensity of discharge pulse from their surface increases quickly, so does the ultraviolet light. Therefore, the intensity alteration in the specific range of UV wavelength can be monitored to reflect the contamination level of insulators. This paper introduces the theory of monitoring the discharge intensity of insulators by use of ＂solar-blind＂ UV sensor. Moreover, it shows the layout and picture in field of UV on-line monitoring system. The contamination level of insulator is correlated with the temperature, humidity and the working time besides the discharge intensity. In order to analyze the comprehensive effects of different factors, fuzzy synthesis evaluation method is applied to build an estimated model and an intelligent synthesis assessment system. The practical application in transmission line of Bishan city lasted half a year, and the analysis data demonstrated that the system has high reliability and fast response speed with low cost. Therefore, it is possible for wide application in late future.