I am trying to use PSPICE to model the behaviour of a electrified and buried pipe.
Specifically, I wish to know the impedance of the steel pipe (ferromagnetic, hollow conductor). There is a rectifier which connects the pipe a grounding system: so a 120Hz rectified current is going through the ground to different points of the pipe and coming back to the rectifier.
I understand that I should not considered the system as a transmission line because is too short (10 miles) compared to the current frequency (120Hz).
Is the impedance the same for a pipe as for a cylindrical conductor (no hollow)? That is; is the Z= (1+j)/(sd); s=conductance, d=skin depth. Can I apply this equation even for low frequencies such as 120Hz?
Z= (1+j)/(sd) applies for the internal inductance and the surface resistance..Are there any other factor to consider (external inductance, coupled inductace)?
Thanks in advance!!
Specifically, I wish to know the impedance of the steel pipe (ferromagnetic, hollow conductor). There is a rectifier which connects the pipe a grounding system: so a 120Hz rectified current is going through the ground to different points of the pipe and coming back to the rectifier.
I understand that I should not considered the system as a transmission line because is too short (10 miles) compared to the current frequency (120Hz).
Is the impedance the same for a pipe as for a cylindrical conductor (no hollow)? That is; is the Z= (1+j)/(sd); s=conductance, d=skin depth. Can I apply this equation even for low frequencies such as 120Hz?
Z= (1+j)/(sd) applies for the internal inductance and the surface resistance..Are there any other factor to consider (external inductance, coupled inductace)?
Thanks in advance!!