摘要
电力系统运行中,运行方式的改变、开关的操作或者雷电等扰动,都会形成过电压,对电气设备和电力系统的正常运行造成危害。避雷器具有优异的电气保护特性,常被用做变电站过电压的主保护,但是其保护效果受到其电气性能参数、配置方式的影响。以750 kV变电站为例,研究了电站用避雷器配置方式对雷电冲击下流过避雷器最大雷电流峰值和避雷器吸收能量的影响,即对避雷器动作负荷的影响。避雷器的标称放电电流越大,避雷器的额定电压越高,避雷器的保护水平相应降低,会影响对被保护设备的保护可靠性。
When power system is working, operation mode change, switch operation or lightning and other disturbances, will form overvoltage and damage the normal operation of electrical equipment and power systems. The arrester has excellent electrical protection characteristics, often used as the main vohage protection of substation, but its protection by its electrical performance parameters, the configura- tion mode. Taking a 750 kV substation as an example focuses on the influence of substation arrester ar- rangement mode on the maximum lightning current flow through the arrester absorption of energy under the lightning arrester lightning surge, that is, the impact of arrester load. The larger the nominal dis- charge current of the arrester, the higher the rated voltage of the arrester, the protection level of the ar- rester corresponding deterioration and will affect the protection of the protected equipment reliability.
出处
《电瓷避雷器》
CAS
北大核心
2018年第1期105-109,共5页
Insulators and Surge Arresters
关键词
避雷器
电气性能参数
配置方式
标称放电电流
arrester
electricalperformance parameters
configuration mode
nominal discharge current
