变压器的继电保护与整定计算

Transformer Relay Protection and Setting Calculation

变压器是供配电系统中不可缺少的重要电气设备,它的故障将对供电可靠性和系统安全运行带来严重的不良影响,同时大容量的变压器也是非常贵重的设备。因此,应根据变压器容量等级和重要程度,装设性能良好、动作可靠的继电保护装置。在电气设备选型中要选择可靠性强、灵敏度高的继电保护装置,使之能够迅速、准确地切除各种故障,保障装置安全、稳定、连续的生产。目前抚顺石化供配电系统中已经广泛的使用数字化继电保护装置,笔者以原油集中加工、炼油结构调整技术改造工程原油罐区及配套设施装置中供电系统变配电为例,介绍6 kV变压器数字化继电保护的应用与整定计算过程。

Transformer is an indispensable electrical equipment for power supply system, its failure will seriously affect the power supply reliability and system security, while large-capacity transformer is also very expensive equipment. Therefore, the relay protection device with good performance should be installed based on capacity class and importance of the transformer. In selection of electrical equipments, reliable and high sensitivity relay protection devices should be chosen, which can ensure to rapidly and accurately remove various failures to protect the device. Digital protection devices has been widely used in Fushun petrochemical current power supply system. In this paper, taking transformation and distribution equipments in a power supply system as an example, application of digital relay protection in 6 kV transformer was introduced as well as setting calculation process.