《35kV无人值守变电站电气部分设计学士学位论文》由会员分享，可在线阅读，更多相关《35kV无人值守变电站电气部分设计学士学位论文（67页珍藏版）》请在金锄头文库上搜索。
1、东北农业大学学士学位论文 学号：A0710060335kV无人值守变电站电气部分设计学生姓名：方 炎指导教师：赵玉林所在院系：电气与信息学院所学专业：农业电气化及自动化研究方向：地方电力系统及其自动化东 北 农 业 大 学中国哈尔滨2014年5月Northeast Agricultural University Bachelors Degree Thesis Student ID：A07100603System Design For The Electrical Part Of Unattended Substation Of 35kVName：Fang YanTutor：Zhao Yulin
2、College：College of Electronic and InformationMajor：Electronic Information EngineeringDriction： Local Power System And Its AutomationNortheast Agricultural UniversityHarbinChinaMay 201435kV无人值守变电站电气部分设计摘 要随着国民生活水平的提高，大量新型用电设备涌现在国民的日常生活中，用电器的数量及种类对电能的质量提出了更高的要求。在国民畅享科技进步的同时，还须确保电力系统能够安全、可靠、优质、经济的运行。因此
3、，必须提高电力网络供电可靠性和发电设备利用率，改善电力系统运行状况，满足经济性和稳定性的要求。本设计的目的是设计一座需要新建35KV变电站，以满足某地区的发展需求。设计以实际负荷为依据，以变电所的预期运行方式为基础，按照国家有关规定和规范，完成了满足该地区供电要求的35kV变电所初步设计。首先，通过分析几种典型主接线设计方案及特点，总结比较各种典型主接线方案的运行灵活性和供电可靠性，确定了该35kV 智能变电站的主接线方式，依据电力系统变电站建设要求，主变压器选择要求和绥中变电站供电区域负荷现状、负荷预测、用户对供电可靠性的要求，确定了主变压器台数、容量和型号。其次，通过短路电流计算，对变电站
4、主要电气设备进行选择，并校验其热稳定和动稳定。并对该35kV 变电站防雷及接地进行设计和校验；最后，对该35kv的二次系统进行设计。本文讨论和分析了数字化变电站建设中的相关理论,并试图把这些理论运用到现今实际变电站的建设中,以便加强数字化变电站理论和实际工程之间的相互联系。随着智能化的电气开关发展,尤其是非常规互感器、智能断路器等新型技术的发展,变电站自动化的水平不断提高,初步进入了数字化的时代。关键词：35KV变电站，负荷计算，短路电流，设备选择，防雷保护- V -System Design For The Electrical Part Of Unattended Substation O
5、f 35kV AbstractWith the improvement of national living standard, a large number of new type electrical equipment emerge in national daily life, which put forward a higher request to the quality of power. When national are enjoying the technology progress, we must ensure that electric power system ca
6、n be run safely, reliably, high-quality, and reasonably. As a result, we must improve the reliability of electricity network supply and the utilization of power generation equipment, and make better the power system operating conditions, in order to meet the requirements of the economy and stability
7、.The purpose of this design is to design a new 35 kv substation, in order to satisfy the demands of the development of a region. The 35 kv substation preliminary design which satisfies the requirement of power supply in this region was based on the actual load and forecast operation mode of the subs
8、tation, and in accordance with the relevant provisions of the state and specifications.First, through analysising several typical characteristics of main electrical connection scheme, summary of comparison of various typical operational flexibility and reliability of main electrical connection schem
9、e, determine the main electrical connection scheme of this 35kV intelligent substation. According to the electric power system substations construction requirements, selection requirements and the power substation main transformer load status, load forecasting, user requirements for reliability, det
10、ermine the number, capacity and type of main transformer. Secondly, by short circuit current calculations, to select the main electric substation equipment, and verify its thermal stability and dynamic stability and this 35kV substation lightning protection and grounding design and validation. Final
11、ly, designing the secondary electric system of this 35kV substation.This article discusses and analyzes the related theory in the construction of digital substation, and try to apply these theories to the current actual substation construction, in order to strengthen the digital substation connected
12、 between the theory and practical engineering. With the development of intelligent electrical switches, especially the unconventional development of new technologies, such as transformer, intelligent circuit breaker, substation automation level unceasing enhancement, the preliminary into the digital
13、 era.Keywords：35KV substation， load calculation， short-circuit current， equipment selection， lightning protection目 录摘 要IAbstractII1前言11.1研究的目的与意义11.2国内外研究现状11.3设计(论文)的主要研究内容22负荷分析32.1负荷的分级32.2负荷计算32.2.1负荷计算方法42.2.2负荷的计算43主变压器选择63.1主变压器的选择原则63.2主变压器台数的选择63.3主变压器容量的选择73.4主变压器冷却方式选择73.5主变压器型式的选择84电气主接线
14、设计94.1电气主接线设计的设计原则94.2电气主接线设计的基本要求94.2.1可靠性94.2.2灵活性104.2.3经济性104.3主接线的一般接线形式104.3.1单母线接线104.3.2单母线分段接线104.3.3双母线接线114.3.4双母线分段接线114.3.5桥形接线114.4主接线方案的选定125短路电流计算135.1短路故障产生的原因135.2短路电流计算的目的135.3短路电流计算的基本要求135.4短路电流计算的步骤155.5短路电流计算156主要电气设备的选择和校验226.1电气设备的选择基本要求226.2断路器的选择236.2.1断路器的选择条件246.2.2断路器的选择和校验256.3隔离开关的选择266.3.1隔离开关的配置266.3.2隔离开关的选择计算276.4母线的选择276.4.1母线选择基本要求276.4.2母线的选择计算296.5互感器的选择316.5.1电流互感器316.5.1.1电流互感器的选择316.5.2电压互感器336.6支柱绝缘子的选择336.6.135kV侧的选择336.6.210kV侧的选择346.7配电装置的选择346.7.1配电装置的设计原则346.7.2配电装置形式的选择356.8所用变压器的选择356.9主要电气设备选择结果367变电站防雷接地设计387.1避雷针的保护范围387.2避雷器的选择原则407.3
