煤矿井上变电站设计.doc
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- 煤矿 变电站 设计
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1、摘 要本次设计根据所学的煤矿供电知识,紧密结合实际,通过实地实践考察研究,并且搜集了大量的相关资料,按照设计供电系统的一般原则:安全性、可靠性、经济性和先进性,对王楼煤矿地面35kV变电站进行了初步设计。设计内容主要包括负荷统计、变压器的选择和校验、主接线的选择、短路计算、电气设备选择、继电保护方案、变电站的防雷保护与接地等等。根据负荷统计的计算的结果确定出该变电站主变压器的台数、容量,再考虑到经济性确定变压器的型号。负荷统计采用需要系数法,短路计算采用标幺值法,为电气设备的选择及校验提供了数据。根据王楼煤矿供电系统的特点,制定了变电所的主结线方式、运行方式、继电保护方案,根据电流整定值以及相
2、关数据的校验,选择了断路器、隔离开关、继电器等一系列电气设备。其中还对王楼煤矿的地面供电系统通过CAD制图直观的展现出来。在本次设计中,得到了学校老师、同学以及单位同事的耐心指导和大量帮助,在此对他们表示衷心的感谢和崇高的敬意,由于所学知识有限,实践经验缺乏,设计中难免存在许多不足之处,敬请老师批评指正。关键词:短路电流计算; 继电保护; 断路器ABSTRACT According to the knowledge of coal mine power supply,closely combined with the reality,through on-the-spot investigat
3、ion research,collecting a large number of relevant data,in accordance with the general principles of the power supply system design which include safety,reliablity,economy and advancement,the paper has carried on the preliminary design for the king building coal mine of 35kv substation.The design co
4、ntent mainly include load statistics,the selection and check of the transformer,main wiring selection,the short circuit calculation,electrical equipment selection,the design of relay protection,substation lighting protection and grounding,etc.First the sets and capacity of the main transformer subst
5、ation were determined by the result of load statistic calculation,then considering economically determine the transformer model.Load statistics adopt the need coefficient method and short circuit calculation use the MAO value method,which provide data for the selection and calibration of electrical
6、equipment.According to the characteristics of the king building coal mine power supply system,we formulated the main connection mode,operation mode,relay protection scheme of the substation.According to the current setting and relevant data validation,we choose a series of electrical equipment ,such
7、 as the circuit breaker,isolating switch,relay and so on. Also the ground power supply system of the king building coal mine were intutively displayed through the graphics of CAD. In this design, I obtained a lot of help and patient guidance from my school teachers,classmates and colleagues,so I exp
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