Trapezoidal phasor diagram and conditions for a line at the maximum load

摘要

This letter draws a phasor diagram and thereafter a trapezoid shaped phasor diagram for a transmission line carrying the maximum load. Certain facets of the voltage phasor diagram in this condition are presented. Through the trapezoid shaped phasor diagram, two conditions that characterize a transmission line at the maximum load are determined and presented and thereafter conclusions are drawn. These conditions might be used to ascertain the health of lines and develop new device protection schemes in distribution systems with fast acting renewables.