110kv变电站毕业设计

目 录

摘 要 ·······················································································1 Abstract ······················································································2 第1章 绪论 ··············································································3

1.1 变电站发展的历史与现状 ·····················································3 1.2 课题来源及设计背景 ···························································4 第2章 变电站负荷计算和无功补偿的计算 ········································5

2.1 变电站的负荷计算 ······························································5 2.2 无功补偿的目的 ·································································6 2.3 无功补偿的计算 ·································································6 第3章 主变压器台数和容量的选择 ·················································8

3.1 变压器的选择原则 ······························································8 3.2 变压器台数的选择 ······························································8 3.3 变压器容量的选择 ······························································8 第4章 主接线方案的确定 ·····························································10

4.1 主接线的基本要求 ······························································10 4.2 主接线的方案与分析 ···························································11 4.3 电气主接线的确定 ······························································11 第5章 短路电流的计算································································13

5.1 绘制计算电路 ····································································13 5.2 短路电流计算 ····································································14 第6章 高压侧配电系统的设计 ····················································17

6.1 高压线路电缆的选择 ···························································17 6.2 高压配电线路布线方案的选择 ···············································17 6.3 高压配电系统设备 ······························································18 第7章 低压侧配电系统的设计 ·······················································21

7.1 变电站配电线路布线方案的选择 ·············································21 7.2 线路导线、配电设备及其保护设备的选择 ·································21 7.3 变电站用电及照明 ······························································25 第8章 变电站二次回路方案的确定 ··················································27

8.1 二次回路的定义和分类 ························································27

8.2 二次回路的操作系统 ···························································27 8.3 二次回路的接线要求 ···························································27 8.4 电气测量仪表及测量回路 ·····················································28 8.5 断路器的控制与信号回路 ·····················································29 8.6 自动装置 ··········································································30 8.7 绝缘监视装置 ····································································30 8.8 继电保护的选择与整定 ························································32 第九章 防雷与接地方案的设计 ·······················································39

9.1 防雷保护 ··········································································39 9.2 接地装置的设计 ·································································39 结束语 ·························································································41 致谢 ····························································································42 参考文献 ······················································································43 附录一：一次主接线图 附录二：10KV配电装置接线图 附录三：二次接线图

摘 要

随着经济的发展和现代工业建设的迅速崛起，供电系统的设计越来越全面、系统，工厂用电量迅速增长，对电能质量、技术经济状况、供电的可靠性指标也日益提高，因此对供电设计也有了更高、更完善的要求。设计是否合理，不仅直接影响基建投资、运行费用和有色金属的消耗量，也会反映在供电的可靠性和安全生产方面，它和企业的经济效益、设备人身安全密切相关。

变电站是电力系统的一个重要组成部分，由电器设备及配电网络按一定的接线方式所构成，他从电力系统取得电能，通过其变换、分配、输送与保护等功能，然后将电能安全、可靠、经济的输送到每一个用电设备的转设场所。作为电能传输与控制的枢纽，变电站必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。随着计算机技术、现代通讯和网络技术的发展，为目前变电站的监视、控制、保护和计量装置及系统分隔的状态提供了优化组合和系统集成的技术基础。

110KV变电站属于高压网络，该地区变电所所涉及方面多，考虑问题多，分析变电所担负的任务及用户负荷等情况，选择所址，利用用户数据进行负荷计算，确定用户无功功率补偿装置。同时进行各种变压器的选择，从而确定变电站的接线方式，再进行短路电流计算，选择送配电网络及导线，进行短路电流计算。选择变电站高低压电气设备，为变电站平面及剖面图提供依据。本变电所的初步设计包括了：（1）总体方案的确定（2）负荷分析（3）短路电流的计算（4）高低压配电系统设计与系统接线方案选择（5）继电保护的选择与整定（6）防雷与接地保护等内容。

随着电力技术高新化、复杂化的迅速发展，电力系统在从发电到供电的所有领域中，通过新技术的使用，都在不断的发生变化。变电所作为电力系统中一个关键的环节也同样在新技术领域得到了充分的发展。

[关键词] 变电站、负荷、输电系统、配电系统、高压网络、补偿装置

1

Abstract

Along with the economic development and the modern industry developments of quick rising, the design of the power supply system become more and more completely and system. Because the quickly increase electricity of factories, it also increases seriously to the dependable index of the economic condition, power supply in quantity. Therefore they need the higher and more perfect request to the power supply. Whether Design reasonable, not only affect directly the base investment and circulate the expenses with have the metal depletion in colour metal, but also will reflect the dependable in power supply and the safe in many facts. In a word, it is close with the economic performance and the safety of the people. The substation is an importance part of the electric power system, it is consisted of the electric appliances equipments and the Transmission and the Distribution. It obtains the electric power from the electric power system, through its function of transformation and assign, transport and safety. Then transport the power to every place with safe, dependable, and economical. As an important part of power’s transport and control, the transformer substation must change the mode of the traditional design and control, then can adapt to the modern electric power system, the development of modern industry and the of trend of the society life.

The region of 110-voltage effect many fields and should consider many problems. Analyse change to give or get an electric shock a mission for carrying and customers carries etc. circumstance, choose the address, make good use of customer data proceed then carry calculation, ascertain the correct equipment of the customer. At the same time following the choice of every kind of transformer, then make sure the line method of the transformer substation, then calculate the short-circuit electric current, choosing to send together with the electric wire method and the style of the wire, then proceeding the calculation of short-circuit electric current. This first step of design included:(1) ascertain the total project (2) load analysis(3) the calculation of the short-circuit electric current (4) the design of an electric shock the system design to connect with system and the choice of line project (5) the choice and the settle of the protective facility (6) the contents to defend the thunder and protection of connect the earth. Along with the high and quick development of electric power technique, electric power system then can change from the generate of the electricity to the supply the power.

[key words] substation ,load ,transmission system , distribution ,

high voltage network ，correction equipment.

2

第1章 绪论

1.1 变电站发展的历史与现状

1.1.1 概况

变电站是电力系统中不可缺少的重要环节，对电网的安全和经济运行起着举足轻重的作用，如果仍然依靠原来的人工抄表、记录、人工操作为主，将无法满足现代电力系统管理模式的需求；同时用于变电站的监视、控制、保护，包括故障录波、紧急控制装置，不能充分利用微机数据处理的大功能和速度，经济上也是一种资源浪费。而且社会经济的发展，依赖高质量和高可靠性的电能供应，建国以来，我国的电力事业已经获得了长足的发展。随着电网规模的不断扩大、电力分配的日益复杂和用户对电能的质量的要求进一不提高，电网自动化就显得极为重要；近年来我国计算机和通信技术的发展及自动化技术的成熟，发展配电网调度与管理自动化以具备了条件。变电站在配电网中的地位十分重要，它担负着电能转换和电能重新分配的繁重任务，对电网的安全和经济运行起着举足轻重的作用。因此，变电站自动化既是实现自动化的重要基础之一，也是满足现代化供用电的实时，可靠，安全，经济运行管理的需要，更是电力系统自动化EMS和DMS的基础。

变电站综合自动化是将变电站二次设备（包括控制、信号、测量、保护、自动装置及远动装置等）利用计算机技术和现代通信技术，经过功能组合和优化设计，对变电站执行自动监视、测量、控制和调节的一种综合性的自动化系统。它是变电站的一种现代化技术装备，是自动化和计算机、通信技术在变电站领域的 综合应用，它可以收集较齐全的数据和信息。它具有功能综合化、，设备、操作、监视微机化，结构分布分层化，通信网络光缆化及运输管理智能化等特征。变电站的综合自动化为变电站小型化、智能化、扩大监视范围及变电站的安全、可靠、优质、经济地运行提供了现代化手段和基础保证。

1.1.2 变电站综合自动化系统的设计原则

1.在保证可靠性的前提下，合理和设置网络和功能终端。采用分布式分层结构，不须人工干预的尽量下放，有合理的冗余但尽量避免硬件不必要的重复。

2.采用开放式系统，保证可用性（Interoperability）和可扩充性（Expandability）。要求不同制造厂生产的设备能通过网络互连和互操作，同 时还要求以后扩建时，现有系统的硬件和软件能较方便的与新增设备实现互操作。

3

本文来源：https://www.bwwdw.com/article/s2wf.html