Effect of Load Encroachment on Distance Protection

For discussing the effect of Load Encroachment on Distance Protection, we make a steady state model of Transmission Line as shown in figure below. In the figure Vi is Sending End voltage and Vj is Receiving End voltage. Power Pij+jQijis flowing in the direction shown in figure. We know that,   Pij – jQij= VixI … Read more

Distance Protection Philosophy

Distance protection is a non-unit system of protection offering considerable economic and technical advantages. Unlike phase and neutral over current protection, the key advantage of distance protection is that its fault coverage of the protected circuit is independent of source impedance variations. Let us take an example of this to understand how distance protection is … Read more