毕业设计（论文）-110kV变电站设计.doc

Abstract PAGE 56 PAGE 57 摘要 电力工业是能源工业、基础工业，在国家建设和国民经济发展中占据十分重要的位置，是时间国家现代化的战略重点。电能是一种无形的、不能大量储存的二次能源。电能的发、变、送、配和用电，几乎是在同一瞬间完成的，须随时保持功率平衡。要满足国民经济发展的要求就必须加强电网建设，而变电站建设就是电网建设中的重要一环。 110kV变电站属于高压网络，该地区变电所所涉及方面多，考虑问题多，分析变电所担负的任务及用户负荷等情况，选择所址，利用用户数据进行负荷计算，确定用户无功功率补偿装置。同时进行各种变压器的选择，从而确定变电站的接线方式，再进行短路电流计算，选择送配电网络及导线，进行短路电流计算。选择变电站高低压电气设备，为变电站平面及剖面图提供依据。本变电所的初步设计包括了：（1）总体方案的确定（2）负荷分析（3）短路电流的计算（4）高低压配电系统设计与系统接线方案选择（5）继电保护的选择与整定（6）防雷与接地保护等内容。 关键词：变电站 负荷 输电系统 配电系统 高压网络 补偿装置 Abstract The power industry is the energy industry, basic industries, in national construction and economic development occupies an important position, it is time the strategic focus of national modernization.Electricity is an invisible, not a lot of secondary energy storage.Power of hair, change, delivery, distribution and electricity, is almost completed at the same instant, must be ready to maintain the power balance.To meet the requirements of national economic development must strengthen power grid construction, and construction of power grid substation construction is an important part. 110kV high-voltage substations belong to the network, the region involved in more substations, consider the issue more, analysis of the tasks substation and user load, etc., select the site, the use of user data for load calculations to determine the user reactive power compensationdevice.While the choice of a variety of transformers to determine the substation wiring, then short-circuit current calculation, select the Transmission and Distribution network and electricity wires to short-circuit current calculations.Select the high and low voltage electrical substation equipment for the substation to provide a basis plane and profile.The preliminary design of the substation include: (1) determine the overall program (2) Load Analysis (3) short-circuit current calculation (4) high and low voltage distribution system design and system wiring scheme selection (5) relay protectionselection and tuning (6) lightni