1、 1 摘摘 要要 本设计主要是针对沙河县变电所 110kV 一次系统，概述了沙河变电 所设计的基本过程和基本方法。 第一章概括介绍了国内外电力工业研究及 发展现状和沙河变电所的基本情况，为后几章提供所需的基本资料。第二 章是电气主接线和电气设备的选择， 根据沙河变电所的原始资料拟定了主 接线方案，确定主变压器的容量和型号。变电所电气主接线是变电所电气 设计的主体、与变电所运行可靠性、经济性的要求等密切相关，对电器选 择和布置继电保护和控制方式等都有较大的影响。 第三章对变电所一次系 统做了短路电流计算，为后面设备的选型提供了依据。第四章是一次系统 电器设备的选择，并在正常工作条件下和短路条件下
2、对其进行校验， 同时 也是对前几章内容的综合概括。 随着科技的发展，变电所的自动化程度大大提高，这就对变电所的主 接线形式和配套设备提出了更高的要求，同时也要求变电所做到可靠、经 济、合理的运行，满足人们对电能的基本需求。 关键词：变电所 一次系统 主接线 短路计算 电气设备 2 Abstract This design is to aim at making one subsystem of Sha He power station 110 kV mainly. Chapter 1 has generalized to introduce research of domestic and i
3、nternational electric power industry and present conditions and basic circumstance of Sha He power station that is basic data needed by several chapters later. Chapter 1 is a choice that connects line and the electricity equipments. According to the original data of Sha He power station to draft con
4、nect line form, capacities and model numbers of generators, main transformers, the transformer the high pressure used by an factories, high the capacity transformers used in case. Connects the line is body of designs the power plant. Credibility and economy standard of power station is closely relat
5、ed, it has bigger influence to choice and arrangement of the electric appliances, to the way of protection and control, etc. According to the technique data of chapter 2, do the short-circuit electric current calculation of subsystem in chapter 3, provides basises for the behind equipments. The choi
6、ce of the subsystem in Chapter 4, its carry on check electric of appliances equipments under the condition of normal hot-circuit condition. Also is systemization of before part. Along with the development of science and technology, with the developing of substation automation, it needs higher requests to connect the line form and the kit equipments of the power station, also request the power plant to attain the credibility, economy, reasonable movement, also satisfy the peoples basi
