营口青花10kv变电所设计 毕业设计 .doc

营口青花10kV变电所设计 摘要 本文是对营口青花10kV变电所进行设计，提供设计方案的说明。本设计根据营口青花集团实际供电需求，根据国家电气相关标准、规范以及青花集团建设规划及负荷现状，规模和发展规划结合近期建设与远期发展的关系，做到远近结合，适当考虑扩建的可能性和发展的可能性。对相应的10kV变电所进行设计,主要包括：对原始设计条件的分析；负荷的计算及无功功率的补偿；变电所主变压器台数、容量和型式的选择；变电所的主接线方案的选择；短路计算；二次回路控制方案的确定及继电保护的设计及校验；变电所进出线型号的选择及校验；防雷保护装置的设计；电路图的绘制。在设计中，应用了有关图表、公式进行相关计算，使用了Word、Auto CADAbstract This paper is a design of the Yingkou Qinghua 10kV substation, provide a description of the design scheme. According to the design of Yingkou Qinghua Groups actual demand for electricity supply, according to the national electrical related standards and codes, and Qinghua Group construction planning and load status, scope and development planning combined with short-term construction and long-term development, do a combination of distance and proper consideration of the expansion possible development and the possibility of. Of 10kV substation of design, mainly including: analysis of the original design conditions; load calculation and reactive power compensation; substation main transformer units, capacity and type selection; selection of substation main wiring plan; short circuit calculation; secondary loop control scheme is determined and relay protection design and verification; substation and outgoing line model selection and validation;design of lightning protection device; circuit diagram drawing.In the design, the application of the relevant chart, formula for the calculation, using Word,Auto CAD software for graphics. In the design and selection of equipment, the reliability, flexibility and economy are fully considered, from many aspects, the importance of power supply of the plant is reflected.The design focus on the safe and reliable power supply, to achieve the purpose of quality, energy saving. Keywords: substation; load calculation; short-circuit current; relay protection; lightning protection 目录 1 绪论 1 2 负荷计算和无功功率补偿 4 2.1 负荷的计算及分析 4 2.1.1 负荷计算的目的和方法 4 2.1.2 负荷分级及供电要求 4 2.1.3 负荷计算 5 2.2 无功功率补偿 6 3 主接线的选择和短路计算 8 3.1 主接线设