光明35kv煤矿变电所本科论文 .doc

光明35KV煤矿变电所设计 摘　　要 变电所是电力系统的一个重要组成部分，由电器设备及配电网络按一定的接线方式所构成，他从电力系统取得电能，通过其变换、分配、输送与保护等功能，然后将电能安全、可靠、经济的输送到每一个用电设备的转设场所。 本设计初步设计了煤矿地面35KV变电所设计。其设计过程主要包括负荷计算、主接线设计、短路计算、电气设备的选择、变电所的继电保护等。通过对35KV变电所的负荷统计，用需要系数法进行负荷计算，根据负荷计算的结果确定主变压器的台数、容量及型号。用标幺法对供电系统进行短路电流计算，为电气设备的选择及校验提供了数据。根据煤矿供电系统的特点，制定了矿井变电所的主接线方式、运行方式。其中35KV侧为全桥接线，6KV主接线为单母线分段接线。两台主变压器采用分列运行方式。并根据电流整定值以及相关数据，选择了断路器、隔离开关、互感器等电气设备，并进行校验。此外还进行了继电保护的设计和计算，提高了整个变电所的安全性。 关键词：35KV；变压器的选择；负荷计算；继电保护计算；短路电流计算 Guangming Design of 35KV Coal Mine Substation Abstract Substation power system is an important component of the electrical equipment and distribution by the network connection mode according to a certain pose, he obtained power from the power system, through its transformation, distribution, transmission and protection functions, and then power safe, reliable and economical electricity supply to each device to set up places. The design of the coal mine ground 35KV substation design. The design process includes load calculation, main wiring design, short-circuit calculation, electrical equipment selection, substation relay protection, etc. Through of 35kV transformer substation load statistics, the coefficient method carries on the load computation, according to the results of the computational load of the identified units, capacity and model of the main transformer. Using the standard method, the short-circuit current of the power supply system is calculated, and the data for the selection and the calibration of the electrical equipment are provided. According to the characteristics of coal mine power supply system, the main connection mode and operation mode of substation transformer substation are formulated. 35KV side is the full bridge connection, the main connection of 6KV is single bus block connection. Two main transformers by way of running. According to the current setting value and relevant data, the circuit breaker, isolation switch, transformer and other electrical equipment are selected, and the verificati