[所有分类]某工厂降压变电站电气部分雷老师.doc

某工厂降压变电所电气设计 作者姓名： 专业名称：电气工程及其自动化 指导教师：雷永锋 讲师 本设计在某工厂具体资料的基础上，依据变电所设计的一般原则和步骤，完成了变电所电气设计。为适应工厂类企业，用电负荷变化大、自然功率因数低的特点，本设计采用两台主变压器，高、低压侧单母线分段的接线方式。并采用变电所主接线并联电容器的方法来补偿无功功率，以减少供电系统的电能损耗和电压损失，同时提高了供电电压的质量。某工厂降压变电所电气设计包括：负荷计算和无功功率计算及补偿；变电所位置和形式的选择；变电所主变压器台数和容量及主接线方案的选择；短路电流的计算；变电所一次设备的选择与校验；变电所高、低压线路的选择；变电所二次回路方案选择及继电保护的整定；防雷和接地装置的确定。 关键词 ：电能 变电所 电气设计The rapid development of economy, science and technology progress of society in all professions in the continuously developing and universities arise unprecedented development tendency, especially high and new, pointed, pure technology application, and everything without electricity, electricity substation is essential to the central –substation is indispensable. According to the modern rural power with the teacher by combining with practice, and discusses the research and engineering and technical personnel, the widely application of consumers substation, which involves many fields such as industry, agriculture, so that the consumers substation of design has the extremely vital significance. This design in a factory on the basis of detailed data, according to the substation design principles of steps, completed the substation electrical design. In order to adapt to the factory class enterprise, power load change is big, natural power factor low characteristic, this design USES the two main transformer, high and low voltage side single busbar segmentation wiring way. And USES the substation of Lord wiring parallel capacitor method to compensate reactive power supply system, in order to reduce the power loss and voltage loss, and at the same time, improve the quality of power supply voltage. A factory step-down substation electrical design including: load calculation and reactive power calculation and compensation; Substation position and forms of choice; Main transformer substation sets and capacity and main wiring schemes choice; The calculation of short-circuit current; Substation equipment choice and calibration once;