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毕业设计-220KV变电站设计，正文共65页，21751字
摘要：本次220KV变电站的设计包括一次和二次部分，主要对变压器台数和容量、主接线方案、高压开关设备、配电装置、防雷保护及继电保护的确定；对变电站负荷、短路电流的计算。在整个设计过程中，短路电流的计算是基础，根据计算出的短路电流进而选择高压开关设备，这样才能在正常运行和短路时可靠地工作。为了保护人身安全，需要装设各种保护装置，而防雷保护是保障人身安全的重要措施；为了提高系统运行可靠性，需要装设各种继电保护装置。
ABSTRACT: This paper is design the 220KV transformer substation which includes two parts of electrical divides. The first part mainly chooses the capacity and specification of the transformer and all kinds of divides. It also calculates the burden, passive compensation and the shot-circuited current. Among the design, the shot-circuited current is basic, upon which can we choose high-level instrument. So it can work firmly not only it is common, but also it is shot-circuited. In order to protect the human, we need all kinds of protected instruments, and it is the key point; in order to offer firm power, we need all kinds of protected instruments.
关键词：220KV 变电站设计
Keywords: 220 KV transformer substation, Comprehensive automation system, design

第1章：原始资料分析及主变选择
1．1原始资料分析
本工程情况：变电所类型为２２０ＫＶ降压变电所，该所建成后与110KV和220KV电网相连，并供给近区用户，按规划设计规划容量为240ＭＶＡ，单机容量为１２０ＭＶＡ，台数为两台。