配电线路故障暂态行波仿真.docVIP

毕业论文 配电线路故障暂态行波仿真 学 院： 电气与电子工程学院 专 业： 电气工程及其自动化 学生姓名： 李明 学 号： 20112345678 指导教师： 王忠和 2012 年 6 月 摘 要 配电线路直接面向用户供电，其运行的可靠性决定了供电的质量和水平。配电线路因点多、面广、线长走径复杂,设备质量参差不齐,受气候的、地理的环境影响较大,又直接面对用户端,供用电情况复杂,这些都直接或间接影响着配电线路的安全运行,造成设备故障率居高不下,故障原因也远比输电线路复杂。对配电线路故障原因的分析,指出故障对变电设备和配电网的危害,提出预防和故障处理办法,并建议应用新技术新设备,减少故障的发生,确保配电网安全、经济和稳定运行 Abstract ? Power distribution line directly to the user, determine the reliability of its quality and level of power. Distribution line for points, wide, line length, walking path complex, uneven quality of equipment, by climate and geography influenced the environment, but also directly to the client for the electricity situation is complex, which directly or indirectly affect the safe operation of distribution lines, resulting in equipment failure rate is high, fault reasons than the transmission line complex. This power distribution line fault analysis of the causes, that failure of substation equipment and distribution networks hazards approach to the prevention and failures, and suggested the application of new technology and new equipment to reduce the incidence of single-phase ground fault to ensure the safety of distribution network, economic and stable operation are important. The model is a 5 circuit 10kv circuit simulation by ATPDraw modeling and analysis of the waveform by matlab. The main contents are: (1) understand the basic theory of traveling waves for a good job behind the theoretical basis. (2) Neutral Grounding in different structures (including non-grounded, the resistance through the arc suppression coil grounding and ground) of the distribution network simulation model. (3) According to the established distribution network and considering the transition resistance of different ground, different fault distance, a number of factors such as different grounding of all power distribution system fault (single phase, two phase short circuit, the two ph