电力变电所主变保护设计.doc

电力变电所主变保护设计
摘要： 变电所是电力系统的一个重要组成部分，特别是超高压枢纽变电站的地位更为突出，它起着汇集和分配电的等重要作用，是全系统安全、可靠、经济运行的重要一环。如果变电站的设备出现故障将危及整个系统连续稳定运行，可能出现系统解列，致使用户断电，造成巨大的经济损失。因此要给变电站的设备装设动作可靠、迅速、性能完善的保护，把故障影响限制在最小围。
本次设计的电力变电所有3个电压等级，110KV/35KV/10KV。高压侧采用双母带旁母的接线方式，中压侧采用单母线分段的接线方式，低压侧为单母线分段，无负荷，接有无功补偿装置。主变为SFSZ10型三绕组变压器（两台）。
本次设计中主要对主变压器进行了保护配置和整定计算，其次对各侧线路进行了保护配置和整定计算。以上设计都是参考《电力工程设计手册》、《电力系统继电保护原理》、《电力系统继电保护与安全自动装置整定计算》、《电力工程电气设计手册》等资料来进行配置和整定计算的。
关键词： 变电站 保护配置 整定计算
Electricity transformer substation designed to protect
Abstract： Substation power system is an important part, especially EHV substations hub status more prominent, and it plays a power pool and the allocation of an important role in the whole system is safe, reliable and economic operation of an important part. If the substation equipment failure would jeopardize the entire system for stable operation of the system may arise out, causing the user off, causing huge economic losses. So give the substation equipment installed Action reliable, rapid and sound performance of the protection, to limit the impact of failure within the framework of the smallest.
The design of the 110 KV substations are three voltage levels, 110 KV/35KV/10KV. High-pressure side of a dual master's cable next to the bus bar, a single-side pressure in the sub-bus connection mode, low-pressure side of a single sub-bus, no load, and then there reactive compensation devices. SFSZ10 into the main three-winding transformer（two）.
The design of the main transformer of main protection for the configuration and setting calculation, followed by the side of the line for the protection of configuration and setting calculation. Above reference design are "Power Engineering Design Manual", "power system protection principle", "power system protection and security automatic device setting calculation", "Electric Power Engineering Design Manual" and use other information used to configuration and setting calculation.
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