某煤矿35kV数字化变电站继电保护及自动化系统设计

发布时间：2018-04-14 05:01

本文选题：变电站设计 + 微机保护　；参考：《吉林大学》2017年硕士论文

【摘要】：随着我国电力建设事业的发展,配电网建设成为行业关注的焦点。电力市场改革的深入对配电网经济安全运行和供电质量的要求不断提高,数字化、信息化成为配电变电站的发展方向。微机保护及自动化系统是数字化变电站重要组成部分,它决定了数字化变电站的整体运行水平的优劣。35kV煤矿变电站是煤矿供电的主力,在煤矿电网中占据重要地位,并且煤矿是一级负荷,其供电的可靠性对安全生产至关重要。随着粤北地区数量众多的煤矿旧站升级改造,以及数字化水平更高的新站投入运行,微机保护及自动化系统在35kV煤矿变电站中被广泛应用。因此,加强微机保护系统及自动化系统在煤矿变电站中的应用研究,在保障配电网的安全经济运行和提高矿区电网的数字化水平等方面有重要的实践意义。本文结合粤北某煤矿变电站新建35kV变电站工程,对其微机保护系统和综合自动化系统进行研究。论文介绍了变电站设计的主要内容,通过多种设计方案的对比、讨论、分析,最终得出符合工程实际的最佳设计方案,并以负荷计算和短路计算为基础,完成变电站一次系统设计。本文介绍了微机保护的基本概念,阐述了微机保护系统的基本构成,对微机保护的软硬件和算法进行研究,结合矿区实际情况,基于可靠性、经济性的总体要求,研究不同的保护配置方案。论文文研究了数字化变电站自动化系统站控层、间隔层、过程层的结构和特征,通过标准化数字变电站方案解决了控制电缆电磁兼容、气候干扰等问题。另外本文对过程层合并单元进行研究,通过合并单元提供常规互感器接口,提高了数字化变电站的经济性。本文通过工程实例,为中低压配电变电站的数字化和自动化建设和改造提供参考思路,对相关的理论和先进技术进行研究,为配电网的发展做出探索和研究。
[Abstract]:With the development of electric power construction in China, distribution network construction has become the focus of attention.With the deepening of the reform of the power market, the demands of economic and safe operation of distribution network and the quality of power supply have been continuously raised. Digitization and informatization have become the development direction of distribution substations.Microcomputer protection and automation system is an important part of digital substation. It determines the whole operation level of digital substation. 35kV coal mine substation is the main force of coal mine power supply, and occupies an important position in the coal mine power network.And coal mine is a first-class load, the reliability of its power supply is very important to safe production.With the upgrading of a large number of old coal mine stations in northern Guangdong and the operation of new stations with a higher digitization level, microcomputer protection and automation systems are widely used in 35kV coal mine substations.Therefore, it is of great practical significance to strengthen the application research of microcomputer protection system and automation system in coal mine substation in order to ensure the safe and economical operation of distribution network and to improve the digitization level of mining power network.In this paper, the microcomputer protection system and the integrated automation system are studied based on the new 35kV substation project of a coal mine substation in northern Guangdong province.This paper introduces the main contents of substation design. Through the comparison, discussion and analysis of various design schemes, the optimal design scheme which accords with engineering practice is finally obtained, and based on load calculation and short circuit calculation.Complete substation primary system design.This paper introduces the basic concept of microcomputer protection, expounds the basic structure of microcomputer protection system, studies the software, hardware and algorithm of microcomputer protection, and combines with the actual situation of mining area, based on the overall requirements of reliability and economy.Different protection configuration schemes are studied.In this paper, the structure and characteristics of station control layer, interval layer and process layer in digital substation automation system are studied. The problems of EMC and climate interference of control cable are solved by standardized digital substation scheme.In addition, the process layer merging unit is studied in this paper. The conventional transformer interface is provided by the merging unit, and the economy of digital substation is improved.Through engineering examples, this paper provides a reference for the digitalization and automation construction and transformation of medium and low voltage distribution substations, studies related theories and advanced technologies, and makes exploration and research for the development of distribution networks.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD61

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