电气自动化毕业论文-煤矿kv电缆对地绝缘参数检测技术的研究.doc

西安科技大学 毕业设计（论文） 题 目 煤矿6kv电缆对地绝缘参数检测技术的研究 函 授 站 专业及班级 电气工程及自动化 姓 名 指 导 教 师 日 期 继续教育学院 论文题目：煤矿6kV电缆对地绝缘参数检测技术的研究 专 业：电气工程及其自动化 本 科 生： （签名）： 指导教师： （签名）： 摘 要 随着电力事业的迅速发展，对供电可靠性和用电安全性的要求在进一步的提高，电力设备绝缘状况检测技术的发展日益得到重视，新的检测设备和检测技术在不断的推出。电线电缆是最常用的电力设备，同时也是出现绝缘故障的概率最高的设备。由于煤层大多身处地下几百米，阴冷潮湿的环境对电缆的考验更加严峻，因此为防止发生事故，对电缆的绝缘检测更加重要。 论文首先简要介绍了电线电缆绝缘材料的特性，阐述了绝缘材料老化的机理、绝缘漏电流的成因和相关电路模型，并在此基础上分析了针对电线电缆的各种绝缘检测技术的原理以及各自的优缺点。其次,针对设计，重点研究了倍压整流电路的特性。使用仿真软件EWB进行线路仿真，选择电路参数，最后制作实物并进行验证实验。 关键字：绝缘参数, 仿真, 附加直流电源, 倍压整流电路 Subject : The Coal mine 6 kV Electric Cable To Ground The Researches Which Insulate A Parameter Examination A Technique Specialty : Electrical Engineering And Automation Name : (Signature): Instructor : (Signature): ABSTRACT With the development of electrical engineering and the further demand on the service reliability and safety of power systems, the insulation monitoring technique has been paid much attention, at the same time，advanced methods and devices has been in constantly emerge. The electric wire electric cable is the most in common use electric power equipments, also is to appear to insulate to break down all a rate the tallest equipments in the meantime. Because coal bed mostly the places underground be several 100 meters, cold and humid environment on the cable even more severe test, so as to prevent the incident, the cable insulation testing even more important. The first part of the thesis has a review-like character. It makes a brief introduction of the characteristic of dielectric, and than the mechanisms of insulation ageing and the circuit model are introduced. Some methods for insulation monitoring are also analyzed based on th