Load shedding Prepared by :

Upadhyay Rakshita R.Roll no : 18

Contents:IntroductionFactors affecting load sheddingConsideration for industrial systemconclusion

introductionLoad shedding : To disconnect the load automatically by

frequency sensetive relay termed as load shedding.

Under frequency load sheddingObject : To balance the load and the genaration . The load is shed a block at a time untill the

frequency stabilize.

Factors affecting load shedding Maximum anticipated overload• load reduction factor (d)• For safest d=0;

Number of load shedding stepsMost utilities use between 2 to 5 load

shedding step.3 is the most common.

Size of load shed at each step• Express as % of overload• % overload = (load-power input/power

output)*100

Frequency setting

Time delay

Location of the frequency relay

Consideration for industrial system

Conclusion: