220kv变电所毕业论文.doc
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1、 摘 要变电站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运行,是联系发电厂和用户的中间环节,起着变换和分配电能的作用。电气主接线是发电厂变电所的主要环节,电气主接线的拟定直接关系着变电所电气设备的选择、配电装置的布置、继电保护和自动装置的确定,是变电站电气部分投资大小的决定性因素。本次所设计的课题是某220kV变电所电气初步设计,该变电所是一个地区性重要的降压枢纽变电所,它主要担任220kV及100kV两电压等级功率交换,把接受功率全部送往110kV侧线路。本所位于市中部,所址工程情况良好,处于地区网络枢纽点上,具有220kV、110k两个电压等级,220kV侧以接受功率为主
2、,110kV主要用于所用电以及变电站近区负荷。为保证正常的供配电要求,各地都在兴建一系列的供配电装置。本文针对220kV降压变电所的特点,阐述了220kV降压变电所的设计思路、设计步骤,并进行了相关的计算和校验。文中介绍的220kV降压变电所的设计方法、思路及新技术的应用可以作为相关设计的理论指导。关键词:变电站 ,主接线,主变压器,电气设备,配电装置AbstractElectricity substation is an important component of the system, it has a direct impact on the entire power systems
3、security and economy, users are connected power plants and the intermediate links, transformation and distribution of electric energy to play the role. Electrical wiring is the main power plants in the main link in Substations, the main electrical wiring directly related to the development of the el
4、ectrical substation equipment selection and distribution equipment layout, protection devices and automatic identification, electrical substation is part ofthe investment size The decisive factor.This topic is designed by a 220 kV electrical substation preliminarydesign, the substation is an importa
5、nt regional hub for the buck substation, as its main 220 kV and 100 kV two voltage power exchange, to acceptdelivery of all power 110 kV line to the side. By the city in the central part of the site works well, a regional network hub points, with 220kV,110k two voltage levels, 220 kV side to accept
6、the power-based, 110 kV and mainly used by the electricity substation near load. To ensure a normal power supply requirements, are built around a series of power supplydevices. In this paper, 220 kV substation buck to the characteristics ofrelief on the 220 kV substation design, design steps, and th
7、e relevantcalculation and validation. In this paper, the buck 220 kV substation design, ideas and new technology applications related to the design can beused as the theoretical guidance.Keywords: Substation, the main connection, the main transformers, electrical equipment, power distribution equipm
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