Application of Isolation Transformer in Lightning Protection of Power System
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
An analysis is made of the types of electric surges that invade weak current equipment, and the problem that the threshold voltage and residual voltage of Zn0 surge protection devices, which are commonly used in lightning protection engineering, tend to be high and cannot protect weak current equipment well. It is proposed that the commonmode and differentialmode components of the lightninginduced overvoltage should be treated separately while protecting. Isolating transformers are introduced as antisurge devices into the lightning protection engineering of weak current equipment, considering the characteristic that there is only electromagnetic coupling and no direct electrical channel between primary winding and secondary winding to isolate the commonmode voltage. The magnetic saturation and magnetic creeping phenomena of iron cores are used to restrain and reduce the differentialmode components of the lightninginduced overvoltage. Using the isolating transformer as essential protection unit in the Zn0 surge protection device to cover the disadvantage of Zn0 surge protection device, the weak current equipment can be protected. The effect of lightning protection is proved through practical application.
Keywords:
Project Supported:
Clc Number:
You are thevisitors
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.