某煤矿供配电系统的设计_毕业设计.doc

摘 要 随着国民经济水平的提高，煤矿产业发展壮大，电作为当今煤矿生产的主要能源，随着煤矿产业的不断增加，对煤矿供配电系统的要求也随之增加。35kV变电所是煤矿供电系统的重要组成部分，它给全矿提供了电力保障。因此煤矿供配电系统对经济效益的提高具有十分重要的意义。 此毕业设计论文是关于某煤矿供配电系统的设计。设计的内容主要包括负荷计算、变压器的选择及短路计算、电气设备的选择以及防雷接地保护等。用需要系数法对负荷统计的结果进行负荷计算和无功补偿。通过负荷计算来确定此煤矿供配电系统变电所变压器的容量、台数以及型号。利用标幺值法对供配电系统进行短路电流的计算，给电气设备的选择和校验提供有力数据。根据此供配电系统的特点，来制定变电所的主接线方式、运行方式。由于电气设备可能产生漏电现象，变电所受到雷击，因此需要对变电所进行防雷接地的设计。通过对负荷计算、短路电流的计算、变压器的选择以及防雷接地保护的确定，提高了设计的可靠性，组合更加灵活，功能更加完善，降低功率损耗，有效保证矿区供电安全、稳定、高效的运行。 关键词：负荷计算；无功补偿；变压器；防雷接地 Abstract With the improvement of the level of the national economy, coal industry development and growth, todays electric energy as the main coal production, with the increase of coal mining industry, coal mine power supply system requirements have increased. 35kV substation is an important part of coal mine power system that provides electricity to the whole mine protection. Coal supply and distribution system therefore has great significance in improving economic efficiency. This graduation thesis on the supply and distribution system in a coal mine design. Designed mainly include load calculation, selection and transformer short circuit calculation, selection of electrical equipment and lightning protection and grounding protection. With the desired load factor method of statistical calculation results of load and reactive power compensation. Coal supply to determine the capacity of the transformer substation and distribution system, as well as the number of units by the load calculation model. The use of unit value method to calculate the distribution system short-circuit current, to the selection and verification of electrical equipment to provide strong data. According to this supply to distribution system, to develop the main substation wiring, operation mode. Since the electrical equipment may produce leakage, substation struck by lightning, and therefore need to conduct mine substation grounding design. Through the load calculation, calculation of short-circuit current, the transformer