Reversible Power Flow On D.C Line
HVDC line can transfer power line from one a.c line to another a.c line and vice-versa through the process of rectification and inverting. And that reversible power flow is decided on the basis of how the thyristor are fired on converter 1 and converter 2.
Summary
HVDC line can transfer power line from one a.c line to another a.c line and vice-versa through the process of rectification and inverting. And that reversible power flow is decided on the basis of how the thyristor are fired on converter 1 and converter 2.
Things to Remember
1) The full converter can be operated as both rectifier and inverter.
2) HVDC line can transfer power line from one a.c line to another a.c line and vice-versa through the process of rectification and inverting.
MCQs
No MCQs found.
Subjective Questions
No subjective questions found.
Videos
No videos found.
Reversible Power Flow On D.C Line
Reversible Power Flow On D.C Line
We know, the full converter can be operated as both rectifier and inverter. Therefore, the full converter is extensively used in HVDC transmission. The general arrangement of 1-Ф system is shown beside.
In this system, suppose power flow from converter 1 to converter 2; converter 1 is fired at α and converter 2 is fired at π + α, so that converter 1 acts as a rectifier and converter 2 as an inverter. Hence, both converters are fired at such an appropriate angle so that the average d.c output voltage of one converter is equal to the voltage input of another converter.
Let α1 and α2 be the firing angle of converter 1 and converter 2.
Vdc1 = (2*Vm* cos α1)/ π
Vdc2 = = (2*Vm* cos α2)/ π
As another converter acts as rectifier another as inverter, the following expression gets developed
Vdc1 = Vdc2
α2 = π -- α1
Hence, our assumption at the beginning is thus proved.
References
1)Wikipedia. High-voltage direct current. n.d. 15 05 2016. <https://en.wikipedia.org/wiki/High-voltage_direct_current>.
Lesson
HVDC Power Transmission
Subject
Electrical Engineering
Grade
Engineering
Recent Notes
No recent notes.
Related Notes
No related notes.