本次设计主要阐述了我校教学I楼各系统电气设计的设计依据、原则和方法及设计选择的结论。在低压配电系统设计中，根据不同负荷等级，确定供电方式及系统供配电方案。运用需要系数法进行负荷计算，并按照规定选择保护电器，达到安全用电和节约能源的目的。在照明的设计中，本着节能的原则，选择荧光灯为光源，通过照度计算，确定最佳光源数，为学生和老师们创造了一个良好的学习、工作环境。
根据电气主线设计应满足可靠性、灵活性、经济性的要求，对低压侧负荷的统计计算采用需要系数法；为减少无功损耗，提高电能的利用率，本设计进行了无功功率补偿设计，使功率因数从0.69提高到0.9以上；短路电流的计算包括短路点的选择及其具体数值计算；而电气设备选择采用了按额定电流选择，按短路电流计算的结果进行校验的方法。
关键词 reactive to供配电； 负荷； 无功补偿
Abstract
This design mainly elaborated our school teaching building I system electrical design basis, principle and method and the conclusion of the design choice. In low voltage power distributi
on system design, according to the different load levels, determine the power supply and system power supply scheme. Application of demand coefficient method for load calculation, and in accordance with the provisions of choice of the protection of electrical equipment, safety of electricity and the purpose of saving energy. In the lighting system design, in the energy saving principle, selection of fluorescent lamp as the light source, through the illumination, the light source to determine the optimum number, for students and teachers to create a good learning environment, work.
According to the main electrical design should meet the reliability, flexibility, economy, the statistics of low voltage side load calculation using need coefficient method; to reduce reactive loss, improve the utilization rate of electric energy, the design of reactive power compensation design, the power factor is improved from 0.69 to 0.9 above; short-circuit current calculation a short circuit point selection and numerical calculations; and electrical equipment selection by the rated current, short-circuit current calculation results check method.
Keywords  Power supply and distribution;  load;  reactive power compensation

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