小区配电所一次设计及cad画图30_毕业论文.doc

摘要 小区配电是电力系统重要的一部分，小区配电系统的可靠性及安全性是维持居民正常生活的基本前提，配电系统一旦出现问题，会直接扰乱居民的生活规律，影响生活生产，甚至会危及社会的稳定。小区配电系统是本文的主要设计内容，本文从保障小区居民供电的可靠性、安全性以及经济性角度设计小区配电系统，并考虑了随着社会经济的发展，居民负荷增长的可能，保证了5~10年满足居民生活对电能的需求。本论文根据小区的实际负荷在正常运行下的工作电流选择了变压器、断路器、隔离开关和互感器等电气设备，并根据其短路情况校验了所选的电气设备的动稳定性与热稳定性、绘制了小区的主接线图。由于小区的面积较大，设计由小区的实际地理位置和负荷平衡的角度选择了变压器的建造位置，并绘制了电缆沟的布置和截面图。 关键词 小区配电,设备选择,短路电流,设备校验 Abstract As an important part of the electrical power system, the reliability and the security of the plot power distribution are the basic premise to maintain the inhabitant normal life, Once the electrical power distribution system has the problem, it can harass inhabitant life directly, affects the life production, even can endanger the stability of the society. The plot power distribution system is the main content designed in this article, this article designs the plot power distribution system to supply power to inhabitants from safeguarding the reliability, the security and the efficiency angles, and has considered the possibility which the inhabitant power load grows with the social economy development, it guarantees satisfying the electrical energy demands of inhabitants in 5~10 years. The article chooses electrical equipments such as the transformer, circuit breaker, isolator and mutual inductor according to the actual load of the plot under the normal operating current and verifies dynamic stability and the thermo stability of the electrical equipments which have been elected, this article also has drawn up the plot main wiring diagram. Because the plot area is big, the design has chosen the transformer construction position by the plot actual geographical position and the load balanced angle, and has drawn up the cable trench arrangement and the profile chart. Key words Plot power distribution, Choose equipment, Short-circuit current, Verification equipment 目 录 摘要 I Abstract II 1 绪论 1 1.1 小区配电的发展背景 1 1.2 本设计的目的、内容以及要求 1 2 本设计的概述 2 2.1 小区供电的意义和要求 2 2.2 小区供电设计的一般原则 3 2.3 设计内容及步骤 3 3 负荷计算及电气设备的选择 5