1、 摘要摘要 随着经济的发展和人民生活水平的提高，对供电质量的要求日益加深。国家提出了 加快城网和农网建设及改造，拉动内需的发展计划，城网和农网 110kV 变电站建设迅猛 发展。由于建设地点地理条件的错综复杂和其他客观条件限制，如何设计城网和农网 110kV 变电站是国家城网和农网建设中需要研究和解决的一个重要课题。变电站是电力 系统的重要组成部分，变电站可靠的运行与国民经济的发展密切相关。本次设计为 110kV 变电站电气部分初步设计，并绘制了电气主接线图。通过对原始资料的分析，从 可靠性、灵活性和经济性等方面考虑，确定了 110kV，35kV，10kV 以及站用电的主接 线。然后又通过负荷
2、计算确定了主变压器台数，容量及型号，然后，根据最大持续工作 电流及短路计算的计算结果，对断路器，隔离开关，电流互感器，电压互感器，母线进 行了选型和校验。之后，对变电站进行了相应的防雷保护规划，从而完成了一次部分的 设计。最后，对变电站的主变压器进行相应的保护规划以及配电装置设计，从而完成了 110kV 电气部分的设计。 关键词关键词：变电站； 一次部分； 防雷保护；主变保护 ABSTRACT With the development of economy and the improvement of peoples living standard,the requirement of pow
3、er quality is increasing. The country put forward to accelerate city net and rural power grid construction and transformation, stimulating domestic demand,development plan, city net and 110kV substation construction of the rapid development ofrural power network. Due to the construction site of geog
4、raphical conditions of perplexingand other objective conditions, how to design the network of city and rural 110kV substation, is a national network of city and rural construction, transformation of the need to study and solve main task.Transformer substation is an important part of power system, an
5、d its reliability is closely related with the development of national economy. The design is the preliminary design of 110 kV transformer substation electrical part ,and draw main electrical one-line diagram. The 110 kV,35kV,10 kV and the main lines are determined by analyzing the concerning load da
6、ta (including its security, economy and reliability). Meanwhile, the number, capacity and type of the main transformer are made certain through the load calculation . then, according to the results of calculating of the maximum work electric current and short circuits, high voltage breaker, isolator switches, current transformer, voltage transformer and bus-bar can be selected, and After designing lightning protection , the primary design of 110 kV electricity primary system is completed .Then,
