Coupling Path Analysis of Electromagnetic Disturbances in a Substation
Zhenguang Liang · Gao dianya jishu · 2008
In order to study transmission of electromagnetic disturbances in a substation,usual electromagnetic disturbance sources are presented. The concept of electromagnetic topology is brought into substation electromagnetic interference analysis and the coupling relationship between electromagnetic disturbance sources and secondary circuit is then given. The tree figure of electromagnetic disturbance coupling in a substation is established. Selection of analysis models in the tree figure and suppression of electromagnetic interferences are further discussed. Model type,such as lumped model,distributed model,transmission line model and antenna model,should be determined by frequencies of electromagnetic disturbance signals. Return paths of electromagnetic disturbance signals need to be handled carefully when measures of shielding and grounding etc. are taken.