Based on the application of the study of six-sequence components method on parallel transmission lines on the same tower

combined with two-terminal fault analysis methods

design a kind of fault ranging device of parallel transmission lines on the same tower based on STM32. By theoretical analysis and calculation

establish the mathematical model and design circuits

including sampling circuit

protection circuit and main circuit. A set of hardware equipment is set up. The results show that the measured result is within 5 % which meets the requirements of fault ranging.