毕业论文___某中型火电厂电气部分设计.doc

某中型火电厂电气部分设计 [摘要] 发电厂是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济。发电厂的作用是将其他形式的能量转化成电能。按能量转化形式大体分为火力发电厂，水力发电厂，核能发电厂和风力发电场。而火力发电是现在电力发展的主力军，在现在提出和谐社会，循环经济的环境中，我们在提高火电技术的方向上要着重考虑电力对环境的影响，对不可再生能源的影响，虽然现在中国已有部分核电机组，但火电仍占领电力的大部分市场，近年电力发展滞后经济发展，全国上了许多火电厂，但火电技术必须不断提高发展，才能适应和谐社会的要求。 本次毕业设计的题目是《某中型火电厂电气部分设计》。,在设计的过程中,根据设计任务书的要求以及变电站的地理环境,容量和各回路数确定火电厂各电压等级电气主接线和厂用电接线,并且选择了各变压器的型号;进行参数计算,画等值网络图,并计算各电压等级侧的短路电流,列出短路电流结果表;计算回路持续工作电流,选择各种高压电气设备,并根据相关技术条件和短路电流计算结果表校验各高压设备.  [关键词] 主接线；短路电流；电气设备；主变保护；配电装置；防雷接地 ? The Design Of the Middle electrical part Of Steam power plant Abstract: Power plant is an important part of power system, which directly affects the security and economy of the whole power system.. The power plant is the role of other forms of energy into electricity. According to the energy conversion form of coal power plant, nuclear power plant and wind power plant. And thermal power is now the main force of the development of electric power, now put forward harmonious society, circular economy environment, we in the direction of improving the thermal power technology to focus on effects of power on the environment, does not affect the renewable energy, although now China has been part of the core motor group, but power is still occupying power of the majority of the market, in recent years power development lag economic development throughout the country, the many thermal power plant, but thermal power technology must enhance the continuous development in order to meet the requirements of harmonious society. According to the design request, in the design process, according to the transformer substation geographical environment, the capacity and various return routes number determined the transformer substation electricity host wiring and the station use electricity the wiring, and chooses various transformers the model; Carries on the parameter computation, the picture equivalent network chart, and calculates var