毕业设计---某大厦供配电系统设计

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1、 I 某大厦供配电系统设计 摘 要 本课题是关于大厦供电系统及变电所的设计。 设计的思路是依据国家规范要求以及 该大厦二类负荷对供电可靠性的要求，制定设计方案及供电措施。在该设计中，依据给 定的设计范围和基础资料，建立起适合自身生产和发展需要的供电系统。该大厦的供电 系统由一条 10kV 高压架空进线提供电源，为确保负荷供电的可靠性，在变电所低压母 线设柴油发电机，从而使整个供电系统更具有其可靠性和灵活性。为适应大厦用电负荷 变化大、自然功率因数低的特点，该设计中采用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。 设计中体现了安全、 可靠、灵

2、活、经济的原则。确定变电所的位置、形式、主变台数与容量等；确定二次继 电保护方案，选用先进的自动保护装置；确定变电所防雷过压保护与接地保护方案；根 据设计要求，绘制大厦供配电系统图、二次继电保护电路图及变电所平面布置图。 关键词关键词：供电系统，安全可靠，主接线 II The Distribution System Design of A Building ABSTRACT This topic is about building power supply system and substation design. The design ideas are based on national

3、regulatory requirements and the building load to the power supply reliability of two types of requirements, develop design and supply measures. In this design, the design based on the scope and given basic information, and establish their own production and development needs for the power supply sys

4、tem. The building by a 10kV high voltage power supply system into the line overhead to provide power supply, to ensure the reliability of the load, diesel oil generator is set up in the low voltage side of substation ,so that the entire power supply system more reliability and flexibility. In order

5、to meet building electricity load changes, the natural characteristics of low power factor, the design methods used to compensate for shunt capacitor reactive power, power supply system to reduce power loss and voltage loss, while improving the quality of supply voltage . Designed to reflect a safe,

6、 reliable, flexible and economic principles. Determine the location of substation, form, number and capacity of main transformer station, etc.; determine the secondary protection programs, use the advanced automatic protection devices; determine substation lightning over-voltage protection and grounding protection program; according to design requirements, draw Building supply and distribution system maps, the second protection circuit and substation layout plan. KEY WORDS：power supply systems