35KV变电站设计-35kv变电站接线图

摘要

变电站是改变电压的场所。为了把发电厂发出来的电能输送到较远的地方，必须把电压升高，变为高压电，到用户附近再按需要把电压降低，这种升降电压的工作靠变电站来完成。变电站的主要设备是开关和变压器。按规模大小不同，称为变电所、配电室等变电站是把一些设备组装起来，用以切断或接通、改变或者调整电压，在电力系统中，变电站是输电和配电的集结点，变电站主要分为：升压变电站，主网变电站，二次变电站，配电站。

一个典型的变电站要求变电设备运行可靠、操作灵活、经济合理、扩建方便。出于这几方面的考虑，本论文设计了一个35kV降压变电站,此变电站有两个电压等级，一个是35kV，一个是10kV。同时对于变电站内的主设备进行合理的选型。本设计选择选择两台主变压器，其他设备如断路器，隔离开关，电流互感器，电压互感器，无功补偿装置和继电保护装置等等也按照具体要求进行选型、设计和配置，力求做到运行可靠，操作简单、方便，经济合理，具有扩建的可能性和改变运行方式时的灵活性。使其更加贴合实际，更具现实意义。

本文以35kV厂用电变电所设计为例，论述了工厂供电系统中变电所一次二次设计全过程。通过对变电所的主接线设计，站用电接线设计，短路电流计算，电气设备动、热稳定校验，主要电气设备型号及参数的确定，运行方式分析，防雷及过电压保护装置的设计，电气总平面及配电装置断面设计和无功补偿方案设计，较为详细地完成了电力系统中变电站设计。

关键词:35KV变电所设计负荷计算；短路电流；变压器选择

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Abstract

The place is change voltage substation. In order to make electricity power

transmission to distant places, must take voltage increases, into high voltage and to users according to need to nearby voltage reduced again, this kind of work by lifting voltage substation to complete. The main transformer substation equipment is switch and transformers. According to size different operations etc, called the substation, the substation is used to assemble some equipment to cut or connected, change or adjusting voltage, in the power system, the substation transmission and distribution of power are mainly divided into the rally point, the substation provids pressor substation, substation, power substation, second, match.

A typical substation needs the reliable and flexible operation, the economic rationality and free expansion of the equipments. For the consideration of these aspects, the paper designs a transformer substation of 35kV which has tow level of voltage, one is 35kV, and the other is 10kV. At the same time, choose the rational selection as to the main equipments in substation. This design chooses two main transformers. As to other equipments such as Circuit Breaker, Isolating switch, Current Transformer, Voltage Transformer, Reactive power compensation device, Protective Relay and so on are to be selected, designed, and configured in accordance with specific requirements. In order to make it reliable to operate, easy and simple to manipulate, economical, with the possibility of expansion and flexibility of changing its operation. As to make it more actual and practical significant.

This article 35 kV power substation factory to design as an example, this paper discusses the factory power supply system of substation a second design process. Through the design of substation Lord wiring, standing electricity wiring design, short-circuit current calculation, electrical equipment dynamic and thermal stability check, the main electrical equipment model and parameter determination, and operation mode analysis, overvoltage protection device lightning protection and the design, electrical total plane and power distribution equipment design and cross section of reactive power compensation scheme design, are detailed in the power system,

completed the substation design.

Key words:35kV substation design load calculation; short-circuit current;

transformer choice

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