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。本变电所的设计首先是要进行负荷的分析与计算,负荷分析的方法有许多,需用系数法,二项式法等等。经过分析,采纳需用系数法更加的适合。接着就是无功补偿,通过公式和查阅无功补偿率的表可以求出所需的无功补偿容量。在变压器台数及容量的选择时,为了提高变电所供电的可靠性,采纳的是两台型号相同的变压器,而主接线的设计,在高低压侧都采纳了单母线分段接线。短路计算中最终采纳了更为普遍的标么值法。对于设备的选择可分为高压侧(10kV 侧)和低压侧(380V 侧)两种。并根据不同的要求看是否需要进行动稳定或热稳定的校验。从而选择更适合的设备以及电缆,母线等。接下来是变压器的继电保护,对于容量小于 800kVA 的油浸式变压器可采纳了电流速断,过电流,以及过负荷三种保护。最后就是防雷与接地的设计,常用的防雷设备有避雷针,避雷带和避雷线 。最终经过分析,采纳了四支避雷针作为变电所电气部分的防雷保护。[关键词] 变电站、负荷、输电系统、配电系统、补偿装置 AbstractSubstation 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. First of all, the design of the substation is necessary to carry out the analysis and calculation of load, the load method of analysis there are many, need to factor method, binomial method and so on. The analysis required a more suitable method. Reactive power compensation and then, through the formula and check the rate of reactive power compensation can be obtained form the necessary reactive power compensation capacity. In the number and capacity of...