毕业设计（论文）-220KV枢纽降压变电所设计.doc

word文档可编辑 PAGE IV 摘 要 本次设计的220KV枢纽降压变电所，将从经济性、可靠性以及灵活性几方面予以选择主变压器、主接线方式、短路电流的计算及电气设备的选择，并将安全性作为继电保护规划、配电装置的规划及防雷规划设计的基本准则，同时还须兼顾经济性方面的考虑。 主接线的可靠性、经济性、灵活性较好。由于所设计的变电站是枢纽变电站，全站停电后，将影响整个地区的供电，所以此变电站在设计时，采用两台OSFPSL-120000/2200型变压器，满足了灵活性和可靠性。220KV侧2回架空线路，出于经济性和灵活性的考虑，采用双母线接线形式；110KV侧4回架空线路，为了满足供电的可靠性，采用了双母线带旁路母线的接线形式；10KV侧重要负荷较多，为14回电缆线路，出于可靠性和经济性的考虑，则采用了单母线分段的接线形式。设备选择后，对设备进行校验。 关键词：变电所；电气主接线；短路电流计算；设备选择校验； Abstract Should design the some problem that discussed in design first 220 KV change to give or get an electric shock, include an electricity lord that changing and giving or get an electric shock the choice, short-circuit electric current calculation connects the line design, electricity equipments and press protection etc. problem with the research that conduct electricity after the electricity protection programming. The reliability、economic and flexibility of the bus arrangement is well. This is a local electric substation. If the electric substation power cut, it will influence the whole area. So in the design of this electric substation use two transformers which model number is OSFPSL-120000/2200. So it can satisfy the flexibility and reliability. It doesn’t take load in the side of 220KV, so it uses double bus bar cord form in order to satisfy economy and reliability .There is much load in the side of 110KV. In order to satisfy the reliability of power supply, it uses double bus bars which have bypass bus bar cord form. There are much important load and it take the load of this electric substation in the side of 10KV, considering the reliability and economy, it use single bus bar section card form .After the equipment be selected, it should be checked. Key words：substation ；the electrical bus arrangement ；the calculation of short circuit；equipment selection and check。 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc171320519 摘 要 PAGEREF _Toc171320519 \h I HYPERLINK \l _Toc171320520 Abstract PAGEREF _Toc171320520 \h II HYPERLINK \l _Toc171320521 绪论 PAGEREF