66kv-10kV变电所电气部分设计.doc

摘要
电在人们的日常生活中扮演着十分重要的角色,所以变电所的设计也就显得尤为重要。本设计是对于德州66kV/10kV变电所的设计。运用所学的知识,对变电所进行具体的设计。
首先根据任务书的已知数据对所给的负荷进行分析,之后确定负荷计算方案并进行负荷计算。为了使系统中的无功功率达到要求,需要设计无功补偿方案,并对变压器进行选择。根据实际情况确定电气主接线方式,并选择短路点进行短路计算。通过短路计算得出的短路电流的有效值与峰值,进行电气设备的选择与校验。在将这些工作系统设计完之后,进行电力系统继电保护的设计,根据之前求出的短路电流跟长时工作电流对变压器保护、补偿电容器保护进行设计,最后再对变电所的防雷与接地系统进行设计。
在对变电所进行设计的过程中,首先需要考虑变电所供电的可靠性,需要保证变电所遇到突发事故的时候不至于造成重大的损失。并且要注意的是,在保证可靠性的同时,还要保证经济性,要考虑建设变电所所需投资的费用,使投资尽可能少。
关键词:电力系统;变电所;电气主接线;继电保护
Abstract
Electricity in People's Daily life plays a very important role, so the design of the substation is particularly important. This design for the 66 kv / 10 kv Dezhou the learned knowledge, for the design of specific substation.
First of all, according to the specification of the known data to analyze the load, according to the known load after load calculation. In order to make the system reactive power requirements, reactive pensation scheme needs to be designed, and choose the transformer. Choose the main electrical wiring according to actual situation,And short-circuit point selection for short circuit to the short circuit calculation of short-circuit current RMS and peak, after choosing electric equipment and these work after the system the design of power system relay protection,According to calculate short circuit current and long before the working current of the transformer protection, compensation capacitor protection last, the design of lightning protection and grounding protection.
In the process of design of the substation,first of all, need to consider the reliability of the substation power supply,and Need to make sure that substation meet the accident not cause significant note,In the guarantee of reliability at the same time, and to ensure the to consider the cost of the investment needed for construction of substation, make investment in as little as possible.
Key words:Power system; Substation; The main