Research on Electromagnetic Transient of HV Power Transmission Project Based on EMTP
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Abstract
This paper focuses on the induced voltage and induced current of the double circuit lines on the same tower. The system component model of 500 kV Power plant access system engineering is built by use of electromagnetic transient program (EMTP). The three-phase voltage unbalance, three-phase current unbalance, inductive voltage, and inductive current of the double circuit line in the same tower from Power Plant to ChengXi substation are calculated by this model. The results show that the three-phase voltage unbalance and three-phase current unbalance can meet the requirements of the national standard based on the current phase sequence and transposition condition which is recommended in this project. When selecting the grounding switch, the inductive voltage should up 5% on the basis of the results in the study, and the inductive current could refer to the results in this study.
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