Simulation and contingency analysis of a distributed network in Iraq

Abstract EN

This paper presents the contingency analysis to study the impact of forced or planned outages on electrical distribution system.

The mathematical modeling of contingency analysis includes; the load flow analysis and the power restoration analysis.

The power restoration is formulated as a constrained multi-objective optimization problem, based on the ranking search method.

The method performs load flow simulations and utilizes the analytical information obtained to maximize the amount of total power restored and to minimize the number of required switching operations.In this work the contingency analysis is based on the advanced CYMDIST software as a tool for the simulation of a distribution network and performing the required analysis.

CYMDIST software is practical and efficient analysis software used by many electrical companies worldwide as well as by the Iraqi ministry of electricity.

The distribution network simulation and contingency analysis proposed in this paper were implemented on Al_Amereah 11 kV network which is a part of Baghdad city distribution network.

The results show that full power restoration under contingency conditions after fault isolation without violating constraints was achieved in three steps: optimal switching, addition of a feeder, and optimal capacitor placement