1. Prepared by :
Upadhyay Rakshita R.
Roll no : 18

2. Contents:
Introduction
Factors affecting load shedding
Consideration for industrial system
conclusion

3. introduction
Load shedding :
To disconnect the load automatically by frequency
sensetive relay termed as load shedding.
Under frequency load shedding
Object :
To balance the load and the genaration .
The load is shed a block at a time untill the frequency
stabilize.

4. Factors affecting load shedding
 Maximum anticipated overload
• load reduction factor (d)
• For safest d=0;
Number of load shedding steps
 Most utilities use between 2 to 5 load shedding step.
 3 is the most common.

5. Size of load shed at each step
• Express as % of overload
• % overload = (load-power input/power output)*100

6. Frequency setting

7. Time delay

8.  Location of the frequency relay

9. Consideration for industrial system

10. Conclusion: