500kV官山变电站直流融冰及无功补偿技术应用研究

发布时间：2018-05-29 16:37

本文选题：500kV变电站 + 直流融冰　；参考：《华北电力大学》2017年硕士论文

【摘要】：随着我国经济的快速发展,电网的总体规模也在不断扩大。冬季冰雪天气导致电力输电线路覆冰现象所带来的一系列严重问题得到越来越多的关注。由于变电站一般难以提供交流短路电流融冰时所需的大量无功功率,因此交流短路电流融冰不适用于500kV及以上的输电线路,而相对于交流短路电流融冰,直流短路电流融冰的优点是其融冰电源容量需求易满足,有效距离长。研究安全、可靠、经济效益良好的输电线路融冰方法和实施方案对提高整个安徽电网抵御冰灾等自然灾害能力,保证电力系统的安全稳定运行以及建设坚强可靠的安徽电网等具有重要现实意义。本论文在阅读相关文献基础上,结合实际工程,提出了500kV官山变电站直流融冰及无功补偿技术应用研究项目的设计方案以及实施方案的整体思路。首先在研究直流融冰基本原理基础上和了解本项目实际输电线路现状的前提下,详细分析了官山变电站直流融冰和无功补偿的需求。其次,根据需求分析提出设计工程的整体方案,即制定集成方案、确定网省协同控制方案以及直流融冰兼动补装置的调度状态和控制策略。然后,根据设计的方案和变电站的基本情况,分析和确定项目的安装位置。最后,结合相关理论和现场运行数据对该套装置在架空输电线路融冰、无功补偿方面的应用效果进行分析。结果表明本文所提方案中动态无功补偿装置在电网异常故障时能够充分发挥作用,且在线路覆冰时,融冰效果良好。500k V官山变直流融冰兼SVC装置,其利用率高,具有较好的经济性,因而本文所提的方案具有一定的普适性。
[Abstract]:With the rapid development of China's economy, the overall scale of the power grid is also expanding. More and more attention has been paid to a series of serious problems caused by the icing of power transmission lines due to the winter snow and ice weather. Because it is difficult for substations to provide a large amount of reactive power when AC short-circuit current melts ice, AC short-circuit current melting ice is not suitable for 500kV and above transmission lines, but relative to AC short-circuit current for ice-melting. The advantage of DC short-circuit current is that the capacity of ice-melting power supply is easy to meet and the effective distance is long. To study the safe, reliable and economic benefit of ice melting methods and implementation of transmission lines to improve the ability of the whole Anhui power grid to resist natural disasters such as ice disasters, It is of great practical significance to ensure the safe and stable operation of power system and to build a strong and reliable Anhui power grid. On the basis of reading the relevant documents and combining with the actual project, this paper puts forward the design scheme and the overall idea of the project of the application of DC melting ice and reactive power compensation technology in 500kV Guanshan Substation. Firstly, on the basis of studying the basic principle of DC ice-melting and understanding the present situation of actual transmission lines in this project, the requirements of DC ice-melting and reactive power compensation in Guanshan Substation are analyzed in detail. Secondly, according to the requirement analysis, the whole project of the design project is put forward, that is, the integrated scheme is formulated, the coordinated control scheme of the network province and the dispatching state and control strategy of the DC ice-melting and moving compensator are determined. Then, according to the design scheme and the basic situation of the substation, analyze and determine the installation location of the project. Finally, the application effect of the device in ice-melting and reactive power compensation of overhead transmission lines is analyzed based on relevant theory and field operation data. The results show that the dynamic reactive power compensation device proposed in this paper can play a full role in the abnormal fault of the power network, and when the line is icing, the ice melting effect is good. 500kV Guanshan variable DC melting ice and SVC device, its utilization ratio is high. Because of its good economy, the scheme proposed in this paper has a certain universality.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM752;TM63;TM714.3

【参考文献】