【摘要】 随着经济的快速发展,对电能质量提出了越来越高的要求,环网柜作为配电网联络的设备,其重要性不言而喻。由于环境影响,施工工艺等因素,环网柜中常常会有局部放电的现象,影响设备的稳定运行,危害电力系统的安全。环网柜的局部放电总的分类可分为四大类:悬浮放电、沿面放电、电晕放电和多点放电,不同的局部放电类型相应的特点以及对环网柜的损害都不一样。基于此,采用超声波法对环网柜的局部放电类型进行识别研究,从超声波检测方法的幅值图、超声波检测方法的相位图和超声波检测方法的波形图三位一体,比较了不同局部放电类型的特征和差异点。与传统的超声波法相比,文中方法检测的参数更多,更能实现准确检测。不仅可以加深对局部放电的了解,具有实际的实践意义,还能为进一步的局部放电定位奠定扎实的理论基础。更多还原

【Abstract】 With the rapid development of economy,higher and higher requirements for power supply reliability are put forward. The importance of the ring network cabinet as the distribution network connection and the power transmission equipment is self-evident. However,due to the environmental influences,construction processes and other factors,there is often a partial discharge phenomenon in the ring network cabinet,which affects the stable operation of the equipment and endangers the safety of the power system. The general classification of partial discharges in ring network cabinets can be divided into four categories: suspended discharge,creeping discharge,corona discharge and multi-point discharge. The corresponding characteristics of different partial discharge types and the damage to the ring network cabinet are different.From the trinity of the amplitude diagram of the ultrasonic detection method,the phase diagram of the ultrasonic detection method,and the waveform chart of the ultrasonic detection method,the characteristics and differences of different partial discharge types are compared. Compared with the traditional ultrasonic method,this method detects more parameters,which can achieve accurate detection. Based on this,the ultrasonic method is adopted to identify the partial discharge type of the ring network cabinet,which not only can deepen the understanding of partial discharge,but also has practical significance,and can lay a solid theoretical foundation for further partial discharge positioning.更多还原