Power Flow Analysis and Steady State Contingency of IEEE 9-bus System Using DigSilent

Abstract

Power flow analysis and contingency states of a power system are fundamental tests of finding the real performance of an electrical network during power system planning and operation. Maintaining the system’s security is a challenging issue facing power system engineers. The system will be secure if it can run within system restrictions, such as limits of bus voltage magnitudes, current and power flow through the lines. in the case of a component failure, such as a generator or transmission line, contingency analysis is useful for increasing the power system’s resilience by examining the system’s vulnerability in case of components failure. Using an IEEE 9-bus system as benchmark, the analysis of power flow through contingency analysis is performed to identify the most critical component affected by voltage violation and critical loading condition. Using the one-by-one and two-by-two outages of generators and lines using DIgSILENT Power Factory software.  The results of the contingency analysis demonstrate how voltage on busbars can be critically affected when the power system is subject to some sort of unconditional phenomena during the operation of the electrical network.