Contingency Studies
Maintaining power system security is one of the most important requirements for any utility and this includes planning for various contingency situations like outage of transmission lines; loss/recovery of generators and loads; changing/setting of switched shunts; injection groups; as well as opening/closing of buses and equipments. Contingency evaluation is carried out by using static as well as dynamic analytical tools such as load flow analysis and transient stability analysis. Real time control and monitoring solutions in energy control centers or energy management systems or load dispatch centers usually use an algorithm called contingency ranking algorithm to shortlist credible contingencies for real time evaluation and control of power systems. Often contingency ranking algorithm will use some approximate and fast load flow type algorithms from a list of contingencies and rank them in the decreasing order of severity. This ordered or ranked list will normally be considered for a detailed contingency evaluation to assess system security. Often contingency ranking algorithm will use some approximate and fast load flow type algorithms from a list of contingencies and rank them in the decreasing order of severity. This ordered or ranked list will be considered for a detailed contingency evaluation to assess system security.
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