珠海配网10kV开关柜故障分析及对策研究

发布时间：2018-08-12 16:21

【摘要】：随着电力行业改革步伐的愈加深入,10kV高压开关柜更为普及,设备故障对可靠性的影响愈发显著,因此10kV高压开关柜的检修与维护工作越来也得到重视。近几年,珠海供电局针对10kV高压开关柜的故障进行了大量的分析及对策研究工作,本文在统计分析故障类型的基础上,重点从发热故障、绝缘故障和机构故障三个方面,分析故障的原因并提出针对性措施,具体工作如下:首先,对珠海供电局10kV高压开关柜故障整体情况进行统计分析,得到高压开关柜的故障种类以及故障发生频率,发现发热故障、绝缘故障和机构故障是珠海供电局10kV开关柜最常见的三种故障。其次,针对发热故障,通过发热部位的分析以及温升的理论计算,分析得出发热故障主要原因包括导电部位接触不良和导电材料选用不当等,并提出采用非接触无线测温方式对开关柜内温度进行监测,从而预防发热故障的发生。然后,针对绝缘故障,分析了近几年来绝缘故障实例,得出导致绝缘故障的主要原因为开关柜内电气设备的绝缘体绝缘能力较差,因而提出了局部放电声波检测技术对开关柜内设备绝缘情况进行监测,并给出了在珠海局排查绝缘放电故障中的实际应用效果。最后,针对机构故障,分析了结构故障的主要原因,得出AEG开关柜地刀辅助开关是故障概率最高的部位,进而采用了重新设计该辅助开关的传动结构,并从材料选择、可实施性等各方面对设计方案进行了分析,最终完成了新型辅助开关传动机构开发,并投入实际应用。本文围绕珠海供电局10kV开关柜故障开展分析,得出了故障的主要类型,并分析了产生故障的主要原因和提出了有效的解决措施。实际应用效果显示,本文提出的措施能有效降低故障率,对珠海供电局10kV开关柜的检修和维护具有很强的指导意义。
[Abstract]:With the deepening of the reform of power industry, 10kV high voltage switchgear is becoming more popular, and the impact of equipment failure on reliability is becoming more and more significant. Therefore, the maintenance and repair of 10kV high voltage switchgear has been paid more and more attention. In recent years, Zhuhai Power supply Bureau has done a great deal of analysis and research on the failure of 10kV high voltage switchgear. Based on the statistical analysis of fault types, this paper focuses on three aspects: heating fault, insulation fault and mechanism fault. This paper analyzes the causes of the failure and puts forward some specific measures. The specific work is as follows: firstly, the overall fault situation of the 10kV high voltage switchgear in Zhuhai Power supply Bureau is statistically analyzed, and the types of faults and the frequency of the failure are obtained. The most common faults of 10kV switchgear in Zhuhai Power supply Bureau are heating fault, insulation fault and mechanism fault. Secondly, through the analysis of the heating part and the theoretical calculation of the temperature rise, the main reasons of the heating fault include poor contact of the conductive part and improper selection of the conductive material, etc. The non-contact wireless temperature measurement method is proposed to monitor the temperature in the switchgear, so as to prevent the occurrence of heating fault. Then, according to the insulation fault, an example of insulation fault is analyzed in recent years. It is concluded that the main reason for the insulation fault is the poor insulation capability of the electrical equipment in the switchgear. In this paper, the partial discharge acoustic wave detection technology is proposed to monitor the insulation of the switchgear, and the practical application effect in the investigation of insulation discharge faults in Zhuhai Bureau is given. Finally, the main reasons of the structural failure are analyzed, and the ground cutter auxiliary switch of AEG switchgear is the most likely part of the fault, and the transmission structure of the auxiliary switch is redesigned, and the material is selected. Finally, the new auxiliary switch transmission mechanism is developed and put into practical application. Based on the analysis of the failure of 10kV switchgear in Zhuhai Power supply Bureau, the main types of faults are obtained, and the main causes of the faults are analyzed and effective measures are put forward. The practical application results show that the measures proposed in this paper can effectively reduce the failure rate and have a strong guiding significance for the maintenance and repair of 10kV switchgear in Zhuhai Power supply Bureau.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM591

【相似文献】