The IUP Journal of Electrical and Electronics Engineering
Preventive Load Shedding for Avoiding Line Overload Under Emergency Conditions Using Sine-Cosine Technique and Accounting for Distributed Generations

Article Details
Pub. Date : Jan, 2020
Product Name : The IUP Journal of Electrical and Electronics Engineering
Product Type : Article
Product Code : IJEEE20120
Author Name : Pradeep Purey, Rajesh Arya, S C Choube
Availability : YES
Subject/Domain : Engineering
Download Format : PDF Format
No. of Pages : 10



At times, emergency load shedding is required based on predicted load in next interval. Under such situations, the load shedding strategy must be planned in anticipation and may be implemented after the load increase or in previous interval itself. In view of this, the paper presents a methodology for optimal load shedding in advance such that operating constraints are satisfied in the present condition and in the next interval predicted load condition. The effect of distribution generation has been considered. Sine-cosine optimization technique has been employed to get minimum load shedding at minimum buses. The algorithm has been implemented on a 14-bus standard test system.


Load shedding is an important issue once the system lands in non-correctable emergency state (Stott et al., 1987). Non-correctable emergency state may arise owing to violations of: (i) line flows; (ii) bus voltages; (iii) stability margin; and (iv) frequency deviations. In each of the above cases, load shedding is required. Many times, if system capability permits load shedding may be avoided by line switching which may even explore the possibility of line overload rotation (Arya et al., 2000).


Load shed, Severity index, Line overload alleviation, Distributed generation

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