智能型变频高压试验装置的研制.pdf

江苏大学硕士肇位论文摘要电力系统中为了确保高电压设备能长期、安全、经济的运行,必须对设备进行交接试验、大修后的绝缘试验、预防性试验,及时发现电气设备内部隐藏的绝缘隐患,以避免设备绝缘在运行中由于工作电压尤其是系统过电压的作用而导致击穿,造成严重的设备事故以及人身事故。当Ji{f试验方法很多,但存在一定的缺点,或者是不便现场试验,或者是工频等效性差,利用变频谐振原理制作的高压试验装置能很好的解决这些问题,但目自U成熟的产品不多。本论文依据变频串联谐振原理完成~种新型交流耐压试验装置的研制。利用调频的方法使被试品电容与高压电抗器产生串联谐振,从而在被试品上得到较高的电压,即实现以小容量的电源对大容量的试品迸行耐压试验的目的。该装置具有以下特点: : 、电压稳定且连续可调,适用大多数电力设备的交流耐压试验。 ,重量轻,便于运输,便于现场进行试验。该装置采用调频方法使调节谐振更容易,被试品的变化范围可以更大,适合大多数电力系统装置的试验。该装置人机界面友好,有完善的保护措施,确保试验的安全,本装置通过省级鉴定,已经在多家电力部门的交接试验、电力检修中得到应用。关键词:高压试验串联谐振单片机SPWM IPM ABSTRACT In electrical power system itis necessary to carry out high—voltage tests including the experiment of connection and insulation and prevention,in order tokeep the high electric voltage equipments insafe, and economical and long-term addition,if the inner insulation deficiency ofelectricity equipments can bediscovered intime, it can avoid to result inthe serious equipments trouble and Human body troubles when the insulation of equipment is destroyed because of undergoing the excess voltage. Although there are at present a great deal of experiment methods,some weakneSS such as inconvenient field experiment or imprecision frequency variable frequency equipment which isbased on the principle ofseries resonance can solve these problems very well,but currently the mature product i S rare. This thesis stresses on the working principle of the device and the design ofthe main resonance between the electric capacity and the high voltage electric inductance iscarried out by the method of the frequency ,the higher voltage will beobtained on the testing object,SO that the big capacity equipment driven by the power supply of the small capacity can be equipment has the following characteristics: big capacity equipment driven by the power supply of the small capaci ty would be achieved. equipment can export continual,stable andadjustable frequency and voltage,whic