A企业10kV380V降压变电站供电系统设计 毕业论文+CAD图纸
摘 要
本文的建筑设计基于实用、节约、安全可靠的建筑设计基本原则，重点在以下两个方面进行建筑设计：一是工业变压器所关键电气设备及其变压器型号的选取，按照工业变电所的压力级别和负荷才能对变压器的容量进行了综合估计，而变压器型号又关系到电力的安全可靠和稳定性；二是工业变压器所配电控制系统及其电源线路的短接计算结果，短接计算结果的主要目的就是要决定变压器所配电系统装置，比如断路器、间隔开关、电流互感器等型式的选用。工业变压器是联系发电机与终端使用者之间的中心环节，起着转换、接收和分配电力的关键功用。所以工业生产供电控制系统产品设计既要做到真正为工业生产服务，为了真正保障产业与日常生活电能方面的需求，而进行节电工作，也需要做到安全、准确、优质、经济。另外，在电源方案设计时，还应该合理的解决好局部整体与全域、当前与长期等关系，既要顾及局部整体与当前效果，也要有全域观点，才能顾全大局，顺应时代发展。
本文主要介绍了A企业10kV/380V降压变电站和低压配电设备的方案。首先，经过比对计算和无功功率补偿等方法，就可以选定了造纸厂主变压器系统与造纸厂变压器系统设备类型；从科学与实践的角度，进行了方法的比较，最后确定了经济利益更高、稳定性更高、操作灵活性更高的主接线，设置了一次接线。之后，进行故障分析和设备的选型、校验；再后，重新设计工厂电源进出线、母线和高压电源的接地设计。最后，进行二次电路设计、整定继电保护系统、防雷设备接地保护器等接地装置的设计。设计成果将能够保证恒安纸制品工厂供电系统的安全可靠，同时确保抚顺恒安造纸厂各个车间电气系统的平稳工作。
本文设计的变电所配电系统具有一定的实用性和先进性，预计会对沈阳当地工农业生产和人们生活提供安全可靠的电力供应和优质高效的电力服务。
关键词：主接线；变电站；负荷计算；短路电流
Abstract
Based on the principles of economy, energy conservation and reliability, the design of this paper is mainly carried out from two aspects: first, the selection of main equipment and transformer models of the substation. The capacity of the transformer is compared and calculated according to the voltage level and load of the substation. The transformer model is related to the reliability and stability of the power supply system; The second is the short-circuit calculation of the power supply line of the substation distribution system. The purpose of the short-circuit calculation is to determine the selection of the model of the substation distribution system equipment, such as circuit breaker, disconnector, transformer and so on.Substation is the intermediate link between power plant and users, which plays the role of transforming, receiving and distributing electric energy. The power supply design of the factory must be safe, reliable, high-quality and economical in order to serve industrial production, effectively ensure the needs of production and domestic electricity, and do a good job in energy conservation. In addition, in the power supply design, we should reasonably deal with the relationship between local and overall situation, current and long-term. We should not only take care of local and current interests, but also have the concept of overall situation, take into account the overall situation and adapt to development.
This paper is the design of 10kV / 380V step-down substation and low-voltage distribution system. Firstly, the workshop load statistics and reactive power compensation are carried out to determine the main transformer and each workshop transformer; From the aspects of technology and economy, through the comparison of the two schemes, the primary scheme of main wiring with economy, reliability and flexible operation is selected. Secondly, short circuit calculation and equipment selection and verification are carried out; Then, determine the plant power incoming line, bus and high-voltage distribution line. Finally, the secondary circuit scheme, setting relay protection, lightning protection and grounding device are designed. The design results can meet the reliability of power supply in Yangquan machinery factory and ensure the stable operation of electrical equipment in each workshop.
The substation system designed in this paper has certain practicability and advanced nature, and it is expected to provide safe and reliable power supply and high-quality and efficient electric services to local industrial and agricultural production and people's life in Shenyang.
Keywords:Mainwiring;Substation;Loadcalculation;short-circuitcurrent
目 录
6.3开关柜的选择 20
6.4导线截面的选择和校验 20
