Abstract
Two heuristic methods are proposed to find an effective and fast solution in modern power distribution networks. For solving the service restoration problem in distribution networks, switch selection indices based on an analytic approach and a practicable heuristic graph-based method are given. The formulation of the problem includes four different objective functions: 1) maximizing the total load restored; 2) minimizing the number of switching operations; 3) maximizing the top priority restored load; 4) minimizing load shedding. A suitable evaluation of switch indices is used for all candidate tie switches (TSs) in the network to find the best solution and decrease the number of switching operations. A new graph-based approach is utilized for finding the best sectionalizes switch (SS) and minimizing the voltage drop. The accuracy and the validity of the approach are tested in two standard electrical distribution networks. The results of the approach are used for IEEE 69-bus and IEEE 119-bus test case.
Highlights
In each modern electrical distribution network, increasing reliability is considered as one of the most important tasks for electrical distribution companies
The service restoration problem is to find a suitable configuration by transferring the loads in out-of-service un-faulted areas to neighboring feeders after the fault occurrence
Service restoration is implemented by changing switch state, the time taken by the service restoration depends on the number of switching operations
Summary
In each modern electrical distribution network, increasing reliability is considered as one of the most important tasks for electrical distribution companies. Service restoration in distribution networks is formulated as a multi-constraint and multi-objective problem, considering consumer’s priority and load shedding implementation. Two heuristic methods are used based on the switch indices and a graph-based approach for finding the best solution to restore the maximum total consumers in deenergized areas considering the minimum switch operations. Following the fault occurrence at point A, a number of the loads get deenergized, and the network gets ready to form a new structure for implementing service restoration plan. Isolating the fault; Creating a list of the candidate tie switches; Selecting one TS according to the first proposed method, implementing the load flow, and studying the network constraints. If the network constraints are unsatisfactory, the TS candidate must be operated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
