摘要随着电力系统的发展,长距离、超高压的架空线路日益普及,在雷电多发地区,设计时防雷成为不得不考虑的问题之一,架空地线是最有效最基本的防雷措施。实际工程中,除了基本的防雷功能以外,我们在设计架空地线时还应考虑节能性、经济性,以及保证长时间的安全运行。因此在了解架空地线如何发挥防雷功能、如何架设的前提下,我们还需要研究架空地线上的感应电流、感应电压,掌握其计算方法。本文在架空地线的相关理论基础上,通过相关软件对高压传输线路进行建模仿真,找出降低双架空地线上感应电压的方案,并针对电能损耗问题做出优化。81474
毕业论文关键词: 双架空地线 接地方式 感应电压 节能降耗
毕业设计说明书外文摘要
Title Research about Induced Voltage of High-voltage Overhead Transmission Lines
Abstract With the development of power systems, long-distance and extra-high-voltage overhead transmission lines have gained growing popularity, especially in lightning-prone areas。 Under such circumstance, overhead ground wire becomes one of the most basic and effective measures of lightning protection。 When we design actual systems, the issue pertaining to the properties of economy and saving power , beside it’s basic function of lightning protection , must be took into account。 In addition ,we also should ensure safe operation for a long time。 Therefore ,under the premise of understanding how to put the function of overhead ground wire into practice as well as how to set up, we also need to study the induced current and induced voltage in overhead lines , to comprehend its calculating methods。 Through the relevant software for modeling and simulation of high-voltage transmission lines, we can manage to reduce induced voltage in double overhead line, and make optimized for the issue of power consumption。
Keywords: double overhead ground wire, grounding mode, induced voltage,energy saving
目 录
1 引言 1
1。1 项目的研究背景 1
1。2 项目的研究目的和意义 2
1。4 本文的主要工作 4
2 架空地线基础理论 5
2。1 架空地线的防雷作用 5
2。2 架空地线的铺设方式 7
2。3 本章小结 9
3。1 架空地线的感应电压 11
3。2 直接接地方式感应电流及耗能 13
3。3 分段绝缘单点接地的感应电流及耗能 15
3。4 奇数段接地、偶数段换位的接地方式产生的感应电流及耗能 15
3。5 本章小结 18
4 架空地线EMTP建模仿真 19
4。1 ATP-EMTP软件简介 19
4。2 ATP-EMTP仿真验证 19
4。3 ATP-EMTP仿真分析地线感应电压影响因素