毕业设计——青澄花园小区供配电工程设计报告rmtjf.doc

PAGE 本科生毕业设计 毕业设计题目 青澄花园小区供配电工程设计 学 生 姓 名 所 在 学 院 专业及班级 指 导 教 师 完 成 日 期 2013 年 5 月 摘 要 本工程为青澄花园小区供配电工程设计，主要设计步骤为负荷计算，一次接线设计，短路计算及高低压电器选择，微机保护，电线电缆选择，低压配电干线保护，防雷接地。 本工程中共有28幢建筑，其中3幢变电所，18幢叠拼，7幢高层。首先计算每幢楼的用电负荷，根据各变电所供电范围内的用电负荷，即可确定变压器容量。高层为双回路供电，叠拼为单回路供电。计算各回路出线电流，即可选择低压出线电缆。本工程低压侧配电方式为分区放射式，短路电流计算按照标幺法计算。继电保护主要整定变压器保护和电力线路保护。低压配电干线保护主要整定过电流脱扣器和低压进线断路器。防雷接地部分的主要工作是判断本工程中的建筑物为哪类防雷建筑，并设计相应保护措施。根据工程实际选择接地方式。 关键词：小区，供配电 Abstract This works for QingCheng Garden District for distribution engineering design, the main steps of the design load calculation, a wiring design, high and low voltage electrical short circuit calculation and selection, computer protection,cable selection, low-voltage distribution lines protection, lightning protection and grounding. In this project a total of 28 buildings, including three substations, 18 villas, seven top. First calculate each buildings electricity load, according to the power substation within the electricity load, you can determine the capacity of the transformer. Tops have double circuit power supply and villas have single loop. Calculate the loop current outlet, you can choose low-voltage outlet cables. The low side power distribution project for the partition radial, short-circuit current calculation in accordance with the per-unit basis. Main transformer protection relay setting and power line protection. Low-voltage distribution lines to protect the main tuning and low-voltage overcurrent release into the line circuit breaker. Lightning protection and grounding part of the main task of this project is to determine what kind of lightning in a building of architectural and design the appropriate protective measures. You can choice grounding way according to the project. Keywords: residential, supply and distribution of electrici