毕业设计（论文）-330kV变电站一次电气部分设计.doc

330kV变电站一次电气部分设计 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，在全国电网中占有特别重要的位置。对变电站进行合理的规划和科学的设计是保证供电质量的前提和基础。本设计为330kV变电站一次设计，设计内容包括主变压器选择、主接线选择、短路电流计算、电气设备选择等几部分，同时附有电气主接线图等图纸加以说明。此次330kV变电站设计最终为2台主变压器。站内主接线分为330kV、110 kV两个电压等级。考虑到站用电，故将电压等级定为三级：330kV、110 kV、 10kV，各个电压等级分别采用双母线带旁路接线、双母线带旁路接线和单母线分段的接线方式。短路电流按三个电压等级母线处作为短路点进行计算。在电气设备的选择上以各种元器件参数选择为主。此外，还对导线、绝缘配合、及接地等方面进行了简单的设计，使变电站电气一次部分设计基本完整。 关键词： 330kV变电站；主变压器；电气主接线；短路电流Abstract The transformer substation is an important component part of the electric power system. It influences the safety of the whole electric power system and the economical operation directly, is the middle link that contacts the power station and the consumer; It has the effect that transforms and assigns the function of the electric energy, is possessed of special important location in the national power net. Carrying on the reasonable layout and scientific design to the transformer substation is the precondition and the foundation that promises the power supply masses. This is the preliminary design for the 330 kV transformer substation, is divided into the primary transformer, the primary connection, the short circuit current computing, and the selection of the device...etc. At the end of design has some electricity hookups to show. That transformer substations ultimately design is 2 primary transformers, this time goes into constructs one, the synthesis considered the project initial period and the long-term movement expense, pursues the equipment life time in most superior economic efficiency. Consider the arrival of electricity, so the voltage level set at three levels: 330kV, 110 kV, 10kV, the voltage level of each sub-band were used to doubles generating line, double generatrix and single generating line.The short-circuit current selects three voltages ranks place for short-circuit spot which carry on the computation. It is primary of device parameter choice in the selecting of electric equipment. In addition, th