冲击电压发生器的原理、试验及设计.doc

冲击电压发生器的原理、试验及设计 摘 要:电力系统内的发，供，用电设备除了长期在额定电压下运行之外，还必须具备在过电压下的绝缘强度。过电压是指超过正常运行电压，它是电器设备或保护设备损坏的电压升高。在电力系统各种事故中，很大一部分是由于过电压造成设备的绝缘损坏引起的。当绝缘油缺陷时，若不及时排除，最终将导致设备损坏，而高电压试验的目的就是通过一定的手段，依靠仪器设备，采用模拟的方法检验电气设备绝缘性能的可靠程度。而冲击电压试验是针对电力系统外部过电压而对绝缘材料进行的一项电气试验，所进行的雷电试验及操作波试验能有效的模拟电力系统的外部过电压，对电气绝缘设备在电力运行中的过压能力能够有效的得到预防和检验。 关键词：高电压试验 冲击电压发生器 【ABSTRACT】：The electricity generation equipment, power supply equipment and consuming equipment of electrical system must base on the over-voltage insulating strength, as well as under long-time routine voltage service. Over-voltage is more than the normal operating voltage, which is damage to electrical equipment or protective equipment during increases the voltage. A variety of accidents in the power system, a large part was caused by the over-voltage insulation damage. If not immediately removed, the equipment will be damaged at last when the insulating oil appears defects. And that the purpose of high voltage testing will be using the simulation method to check the insulation reliability of electrical equipment. The impulse voltage test is for external over-voltage power system while an electrical insulating material testing, which is for the service pressure of electric power equipment can be effectively prevented and testing 【KEY WORDS】High voltage test Impulse voltage generator 目 录 1 绪论 ………………………………………………………………………………………………3 1.1冲击电压发生器的发展历史和现状…………………………………………………………3 1.2冲击电压发生器在电力系统中的应用………………………………………………………3 2 冲击电压发生器的原理及结构……………………………………………………………………4 2.1冲击电压波形…………………………………………………………………………………4 2.2冲击电压发生器的原理………………………………………………………………………5 2.3冲击电压发生器的结构………………………………………………………………………6 2.4冲击电压发生器的接线方式…………………………………………………………………8 2.5冲击电压试验系统的接线联线方式…………………………………………………………10 3 冲击电压发生器的设计…………………………………………………………………………14 3.1冲击电压发生器的标称电压的选择…………………………………………………………14 3.2冲击电压发生器的脉冲电容的选择…………………………………………………………14 3.3冲击电压发生器的容量的确定………………………………………………………………15 3.4 回路选择……………………………………………………………………………………15 4 冲击电压发生器在高电压试验中的应用………………………………………