110kv变电站设计.doc
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1、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。然后又通过负荷计算确定了主变压器台数,容量及型号
2、,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:变电站; 一次部分; 防雷保护;主变保护ABSTRACTWith the development of economy and the improvement of peoples living standard,the requirement of power quality is increasing. T
3、he 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 geographical conditions of perp
4、lexingand 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, and its reliability is closel
5、y 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 data (including its security,
6、 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 transfor
7、mer, 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,the conservation programme for the main transformer is made and the power distribution unit is designed.And the design of 110 kV
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