2×12MW凝汽式火力发电厂电气部分设计.docVIP

攀枝花学院本科毕业论文 ABSTRACT PAGE 2×12MW凝汽式火力发电厂电气部分设计 攀枝花学院本科毕业论文 摘要 PAGE I 攀枝花学院本科毕业论文 ABSTRACT PAGE PAGE II 摘 要 本设计主要介绍了某区凝汽式火电站电气部分的相关知识，包括了电气主接线以及厂用电的设计、电气开关的选择、配置继电保护、防雷及接地等各方面的内容。 待建电站第一期工程装机容量和台数为2×12MW，第二期为2×25MW。总装机容量=2×12+2×25=74MW，小于200MW，单机容量小于50MW，为小型凝汽式火电厂。当本厂完全投产后，在系统总容量中占据的比列为：74/（4×25+2×25+74）×100%=33%，超过了电力系统检修备用容量与事故备用容量，而且最大负荷利用时间在四千到七千小时之间、包括了Ⅰ类负荷和Ⅱ类负荷，说明该火电站在未来供电系统中占据主要地位。从负荷特点及电压等级可知，它具有10KV， 110KV两级电压负荷。10KV负荷为地方负荷。110KV接受本厂剩余功率。最大可能接受本厂送出电力为74-13.2-74×10%=53.4MW，最小可能接受本厂送出电力为74-18.9-74×10%=47.7MW。 关键词：凝气式火电厂 电气部分 2×12MW + 2×25MW ABSTRACT This design mainly introduces the condenser type selecting good electrical part of the relevant knowledge. It also includes the main electrical wiring and APC design, the choice of electrical switch, configuration relay protection, lightning protection and grounding and so on various aspects of content. The power station is to be built, and its installed capacity and the numbers are 2 x 12MW for the first phase of the project, 2 x 25MW for the second phase. The total installed capacity of is equal to 2 x 12 + 2 x 25 = 74MW, but less than 200 MW. The standalone capacity of small condenser type coal-fired plants is less than 50MW .After the factory’s production completely, it occupies total capacity in the system, taking as: 74 / (than 4 * 25 + 2 x 25 + 74) x 100% = 33%, which is more than the power system maintenance spare capacity and accident the spare capacity. Besides ,the biggest load of the using time is from 4,000 to 7,000 hours, including theⅠkind of load and theⅡkind of load. From what have been mentioned above all, which embody that the power-stations play an important role in fut