110kV变电站一次及二次系统的设计

摘要

本次设计的内容为110kV变电站一次及二次系统的的设计。本篇论文主要针对变电站设计过程中的负荷的统计与计算，电气主接线方案的提出与确定，短路电流的计算，电气设备的选择及校验，继电保护，二次接线，防雷保护等方面进行了论述。在本次设计中，为了尽可能使设计贴近实际生活，查阅和参考了大量资料，请教了多位老师，最终完成了本次设计。

在我国始终存在一个严重的问题：绝大部分的供电网络基础比较薄弱，但是供电的半径却由于地理原因而很长，造成的结果就是电力在线路上传输时的损耗较大，导致的结果就是传输到线路末端时用户的电压过低，从而对人民的正常的生产和生活影响。为了满足人民生活用电兼顾工农业发展，所以本次设计选择了设计一座110kV变电站。本变电站主要用于负担地方性负荷，包含的负荷区域内大部分负荷均为三类负荷，其余只有一处为二类负荷，为了保证供电的稳定性和可靠性，设计中尽可能选用电气性能好的新型设备，同时为了兼顾经济性的原则，选用的设备在保证性能的同时应尽可能选择价格合适的设备。110kV单回路进线，本变所有一处二类负荷，其余均为三类负荷，生活用电和工业负荷比重较大，共有8

⁄型条10kV出线。本变电所装设两台等容量主变，主变采用双绕组变压器SF7−10000110

⁄型，电压互感器同样变压器。断路器型号根据系统要求及安装地点综合选择ZN5−10630

根据额定电压和用途、安装地点综合考虑选择JDZX-10型电压互感器。10kV侧的电力电容器按照规程的要求需要装设过电压保护以及无时限过电流装置。而在10kV的出线处，同样按要求需要安装速断保护和过电流保护。主变压器处按规程要求需要安装过电流、过负荷保护，瓦斯保护以及电流速断等保护。

关键词：110kV变电所；主接线；电气设备；继电保护

Design of primary and secondary system of

110kVsubstation

Abstract

The design of the 110kV substation for the primary and secondary system design. This paper

mainly focuses on the statistics and calculation of the load in the substation design process, the

formulation and determination of the main electrical wiring scheme, the calculation of the short

circuit current, the selection and verification of the electrical equipment, the relay protection, the

secondary wiring, the lightning protection Aspects were discussed. In this design, in order to make

the design as close as possible to the actual life, access and reference a lot of information, ask a

number of teachers, and ultimately completed this design.

There is always a serious problem in our country: the vast majority of the power supply

network is relatively weak, but the radius of the power supply is long due to geographical reasons,

the result is the power transmission on the line when the loss is large, resulting in the result is the

transmission To the end of the line when the user's voltage is too low, thus the people's normal

production and life impact. In order to meet the people living electricity combined with industrial

and agricultural development, so this design chose to design a 110kV substation. The substation is

mainly used to bear the local load, including the load area of the majority of the load are three

types of load, and the remaining only one for the second class load, in order to ensure the stability

and reliability of power supply, the design as much as possible to use electrical performance Good

new equipment, and in order to take into account the principle of economy, the choice of

equipment to ensure the performance at the same time as much as possible to choose the right

price equipment. 110kV single loop into the line, the change of all the two types of load, the rest

are three types of load, the proportion of domestic electricity and industrial load larger, a total of

eight 10kv outlet. The substation installed two equal-capacity main transformer, the main

⁄type transformer. Breaker type transformer dual-winding transformer SF7−10000110

According to the system requirements and installation location Comprehensive selection ZN5−⁄type, the voltage transformer also according to the rated voltage and use, installation site 10630

to consider the choice of JDZX-10-type voltage transformer. 10kV side of the power capacitor in

accordance with the requirements of the requirements of the installation of over-voltage protection

and no time limit over current device. And in the 10kV outlet, the same requirements as required

to install quick-break protection and over-current protection. The main transformer according to

the regulations require the installation of over-current, overload protection, gas protection and

current quick-break protection.

Key words: 110kV substation; main wiring; electrical equipment; relay protection