Critical Contingency Study of Sudan National Grid For Electricity

Abstract

The main target and objective of this thesis is to avoid blackouts and to have a secure operating point with loadings of the transformers and transmission lines, below their limits to have a good margin for N-1 contingency analysis. Contingency analysis and evaluation are the most important tasks for planning and secure operation of large power systems. This thesis focuses on the contingency analysis of Sudanese National Grid (NGS) due to the rapid load growth and the transmission lines expanded. A power system under normal operation may face contingencies such as line outages, generator outages, loss of transformers, and sudden change in the loads or faults. These may cause transmission line over loading and bus voltage limit violations. For that reason Sudanese National Grid is simulated with base load (1700 MW). NEPLAN Program is used to study and analyze the contingency for the critical events which may occur. Major observations of dynamic behavior of the system are discussed. Lastly, a conclusion and recommendation are made.