某小区10kV变电所电气部分设计-毕业论文.doc

某小区10kV变电所电气部分设计 Electrical design of a 10kV substation in residential area 摘要 在这个经济水平飞速发展新时代，工业用电和居民用电的需求都猛增，10kV变电所是连接高压输电网和低压配电网的关键核心。在我国电力系统中，10kV变电所肩负着低压配电网络的重要任务，其主要功能有：接受、变换和分配电能。所以，10kV变电所的设计尤为重要。 在民用与工业供电设施的建设中，10kV 变电所的设计直接影响供配电末端的安全可靠性。综合考虑安全、可靠、经济的因素，根据负荷容量确定变电所的主接线；变压器以及电气设备型号；继电保护和防雷接地；利用CAD软件完成高压、低压系统图、平面布置图、二次接线图以及整套施工图绘制。严格遵守设计规范，在满足安全指标的条件下，实现经济最优化。 关键词：10kV变电所；电气设计；设备选型；CAD绘图 Abstract In this new epoch of rapid economic development, both industrial and residential electricity demand has soared rapidly. 10kV substation is the pivotal core connecting the high-voltage transmission grid and low-voltage network. In our countrys electric power system, The vital assignment of low-voltage power distribution network falls on 10kV substation, and its main functions are: receiving, changing and distributing electric energy. Therefore, the design of 10kV substation is particularly important. In the construction of civil and industrial power supply facilities, the design of 10kV substation immediately impacts the safe reliability of the power supply and distribution terminal. Guarantee the design from the safety, economic and reliable aspects of comprehensive consideration, determine the main wiring of the substation on the basis of loading capacity; kinds of power transformer and electrical equipment; protective relaying and grounding for lightning; use CAD software to complete high and low voltage system diagram, floor plan, secondary connection diagram and a intact working plan. Strictly observe the design specification, under the condition of satisfying the safety index, optimize the economy. Key words: 10kV substation；electrical design；equipment selection；CAD drawing 目录 TOC \o 1-3 \h \u 第1章 绪论 1 1.1设计背景及目的 1 1.2小区的基本资料 1 1.2.1设计规范 1 1.2.2小区自然条件 2 1.2.3小区基本资料 2 1.3设计内容 2 第2章 负荷计算及变压器选择 4 2.1负荷计算 4 2.1.1需要系数法 4 2.1.2小区的负荷计算 5 2.2无功功率平衡及无功补偿 6 2.2.1无功补偿的要求及平衡 6 2.2.2无功功率平衡及补偿 6 2.3变压器选择 6 2.3.1变压器选择原则 7 2.3.