Analysis of Operation Mode on Induction Voltage and Induction Current of the Circuit Line of the Same Tower

Key words: 
• operation mode /
• induction voltage /
• induction current /
• maintenance strategy

Abstract: [Introduction] The induction voltage and induction current of the four circuit of the same tower are greatly influenced by mutual operation mode. [Method] According to an example of practical project, the influence of different operation modes such as shutdown combination and transmission power flow on the induced voltage and induced current was analyzed. [Result] The results show that the electromagnetic induction current of the circuit under test increases with the increase of power flow on other transmission lines, and different outage modes affect the magnitude of electrostatic induction voltage and electromagnetic induction current by changing the space distance and electromagnetic coupling between the operation loop and the detected loop. [Conclusion] When the grounding switches of substations failed to meet the requirements to control the induction voltage and induction current, a strategy of adjusting the operation mode to cooperate with the line overhaul and put into operation is introduced.