歷城60KV降压变电所电气部分毕业设计稿5956260.docVIP

摘 要 历城变电所电气部分初步设计主要包括主接线的比较，短路计算，电气设备的选择，配电装置的布置以及防雷保护等。其中电气主接线是电气设计中最为重要的一环，文中通过对两种主接线的经济性、可靠性以及优缺点的比较，得出最适合本所要求的主接线；短路计算是设备选择的基础，网络变换，短路点的选择，以及元件参数的计算，根据这些选择适合本设计的电器设备。电气设备主要是针对高压电气设备而言，（包括母线、高压断路器、隔离开关、电流互感器、电压互感器、避雷器、补偿电容器等），文中详细介绍了各种电气设备的选择方法和校验方式；配电装置的布置和防雷保护是息息相关的，根据配电装置的设计原则和本所的具体情况，本次设计采用的是普通中型布置；而根据这种配电布置方式和面积，对于防雷保护的设计决定采用避雷针和避雷器来构成。当然文中也涉及了自动装置和继电保护的配置，并在适当位置附加了图纸（主接线图、平面图、断面图、防雷保护图等）以及表格、插图等方便阅读、理解。 关键字 电力系统， 短路计算， 设备选择， 校验 Abstract The graduation thesis is about initial designing of electrical part for the substation in Anjiang. It mainly includes the comparison of chief wiring, the calculating for shorting-current, the choice for the electrical equipment, the arrangement for the distribution device and etc. The electrical chief wiring is one of the most important links in the electrical designing. In the text, by comparing the economic, reliability, advantage (disadvantage) for the two kinds of chief wirings, in order to get the most being required; Network transformation, the choice for the point of short-circuit, the calculating for the parameter of device and etc, in these steps, each one needs to be cautious, otherwise it will bring tremendous effect to the choice of equipment; Electrical equipment (high voltage) includes bus, high voltage breaker, CT, PT, lightning arrester and compensate-capacitor. In this text all kinds of equipments’ choosing and proofreading methods are introduced detailedly; The arrangement for the distribution device is integrate with the protection for defending thunder and lightning, so according to the principle of plan and the concrete situation of this substation, I choose a arrangement plan of ordinary and medium-sized, while adopt lightning rod and lightning arrester to constitute the protection for defending thunder and lightning. Of course, this article also simply introduces the designing for the automatic device and the relay’s protection, meanwhile it adds up some design drawing (chief wi