曙光机加工厂车间变电所及低压配电系统设计全套.doc

摘 要 电能国家经济的命脉之一,无论是在工业建设还是农业建设方面都发挥着不可取代的作用，是奠定社会主义现代化基础不可缺少的能源。本次设计是机加工车间变电所及低压配电系统的设计。本文首先采用需要系数法进行负荷计算并在低压侧进行无功功率补偿，进而确定所需变压器的容量、台数等。其次，根据机加工车间用电特点及任务书要求综合设计经验以及不同接线方案的优缺点，确定主接线方案，并由住接线方案选择所需的高低压设备型号。最后，综合前面的设计及计算确定相关的继电保护方案并进行照明和防雷设计。 在仔细分析符合性质和数量的基础上，以严谨的方法完成本设计的内容，达到设计任务书的要求，并将设计成果用CAD展现出来。 关键词：负荷计算 车间变电所 主接线 短路电流计算 低压配电系统  ABSTRACT Energy is the energy and power of modern industrial production. Supply and distribution technology, is to study the problem of electricity supply and distribution. Factory power supply design is a very important part in the design of the entire plant construction, substation is the core of the system of factory power supply. So It is very important to design and construction of a safe, economical substation, the quality of its design direct impact on the production and development of the future plant. The design is the design of the machine shop substations and low voltage distribution systems. Firstly, using the need coefficient method to calculate the load in the low-voltage side reactive power compensation and determine the required transformer capacity, number of units. Secondly, proceed from the economy and reliability of electrical characteristics according to the machine shop and the mission statement of requirements to determine the main wiring scheme and select the desired high and low voltage device model by wiring scheme. Finally, determine the relay and lighting and lightning protection design according to the front design and calculation Careful analysis on the basis of the nature and quantity of, strict compliance with the requirements and principles of the relevant design, follow the steps above design the main wiring of the substation, layout, high and low pressure side of the protection device through CAD drawings unfolded. Keywords：Workshop substation ;Load calculatio