电气工程毕业设计

500KV变电站一次电力系统设计(伊敏电厂二期工程)

作者：郝伟健

指导教师：李刚

摘要

随着现代工业技术和电子信息科技的飞速发展，安全、可靠、优质的电能逐渐体现出它的重要地位，电能是工业生产和生产生活的主要能源和动力，由电气设备的不断提高，实现电气化可以大大增加产量，提高产品质量，提高生产效率，降低生产成本，改善工人的劳动条件，有利于实现生产过程自动化。按照设计500kV 变电站的电气一次部分的主接线的运行原则和功能实施，把500kV 变电站双母线的电气一次部分的双分段带旁路接线与3/2 断路器的接线方式对比设计，以选取出最优的主接线设计方案。其次，要合理选择、认真校验变电站的所有电气设备，已达到性能和经济最优。以此为前提，我们要认真分析变电站经常出现的问题，设计要做到对故障的分析以及解决，已达到防患于未然。

电力工业是能源性工业、基础性工业，在国家建设和人民生产生活以及经济发展中占有十分重要的位置，是国家实现现代化的战略重点。电能是一种无形且不能大量储存的二次能源。电能在发电、变电、送电、配电和用电，几乎是在同一瞬间完成的，须随时保持功率和频率的平衡。要满足国民经济发展的要求就必须加强对电网的建设，变电站的建设就是电网建设中的重要环节之一。

关键词500KV变电站主接线变压器隔离开关负荷计算短路计算

Abstract

With modern industrial technology and the rapid development of electronic information science and technology, safe, reliable, high-quality electricity reflects its important position gradually, electricity is the main industrial production and production life energy and power, and by the constant improvement of the electrical equipment, electrified can greatly increase production, improve product quality, improve production efficiency, reduce production cost, improve labor conditions and is helpful to realize automation of production process.According to the design of 500 KV substation run a part of the main electrical wiring principle and function implementation of the 500 KV double busbar substation electrical part of the double segment at a time with bypass connection with 3/2 circuit breaker connection mode of the design, to select the optimal main wiring design. Second, to a reasonable selection, carefully check all the electrical equipment, transformer substation has reached optimal performance and economy. Premise, we should carefully analyse substation often appear problem, design to do the analysis of the fault and solve, has reached to nip in the bud.

Electric power industry is a basic industry, energy industry, in national construction and people's production and living, and occupies a very important position in the economic development, is the national modernization strategic priorities. Electricity is a kind of intangible and cannot be a large number of secondary energy storage. Electrical energy in power generation, substation, transmission, distribution and utilization, is almost at the same instant, to keep the balance of power and frequency. To meet the requirements of national economic development it is necessary to strengthen the construction of power grid, the construction of the substation is one of the important link of power grid construction.

Key words 500KV Substation Main electrical connection transformer Isolating switch Load calculation Short circuit calculation