某机床厂供配电系统的设计.docVIP

本科毕业设计 题 目 清华机床厂供配电系统设计 学 院 工 学 院 专 业 电气化及其自动化 毕业届别 2011届 姓 名 指导教师 职 称 教 授 甘肃农业大学教务处制 二〇一一年六月 清华机床厂供配电系统设计 小强 （清华农业大学 工学院 07农电班） 摘要：电力行业是国民经济的基础工业，它为现代工业、农业、科学技术和国防提供必不可少的动力。电能是现代工业生产的主要能源和动力.随着现代文明的发展与进步，社会生产和生活对电能供应的质量和管理提出了越来越高的要求。工厂供电系统的核心部分是变电所。本文是清华机床厂的供配电系统设计。以发电厂电气部分、高电压技术、继电保护、供配电系统、电力工程基础等专业知识为理论依据，主要进行了该厂的降压变电所设计。设计主要包括：通过负荷重要性确定了工厂的供配电方式以及降压变电所电气主接线的选择；通过车间负荷的计算和无功补偿的计算，选择了各车间变电所和总降压变电所的变压器型号以及台数；通过短路电流的计算对线路以及设备进行了继电保护的设计：通过变电所的布局设置以及电压等级，对变电所进行了防雷与接地保护等。本设计对于建造一个安全、经济的变电所具有极为重要的参考价值。 关键词 ：供配电系统；负荷统计；短路电流计算；继电保护；防雷接地。 Abstract:The electric power profession is the primary industry of national economy,it provides the motive of essential to have for the modern industry, agriculture, science technique and national defense. Energy modern industrial production is the major energy and power. With the development of modern civilization and progress, social production and life to the quality of power supply and management of the increasingly high demands. Factories power supply system is the core of the substation. The design is for the machine tool plant of Lan zhou for distribution design. The electric power plants to some, high-voltage technology, such as protection for the theoretical basis of professional knowledge, high Voltage Substation on the main part of the plant design graduate training. Design steps include: Determined by the importance of the plant load distribution methods and step-down substation for the main electric connection of choice; through the shop load calculation and the calculation of reactive power compensation, choose the workshop and the total step-down substation Transformer model and the number of Taiwan; by short-circuit current calculation of the lines and equipment for the protection of the design: the layout settings, and through the substation