30-03-2012, 12:25 PM
power system security
Introduction
It defined as the ability of the system meet load under a credible set of contingencies.
Insecurity is the inability to meet all or part of the load.
REASON OF SYSTEM SECURITY
Imbalance between generated power & load demand
Variations of system frequency
Variations of system bus voltage
Overloading
SECURITY FUNCTION
SYSTEM MONITORING
CONTINGENCY ANALYSIS
CORRECTIVE ACTION ANALYSIS
SYSTEM MONITORING
Telemetry System
SCADA System
CONTINGENCY ANALYSIS
Contingency Analysis Program
CORRECTIVE ACTION ANALYSIS
Optimal Dispatch
Post Contingency
Secure Dispatch
Secure post-Contingency
FACTORS AFFECTING POWER SYSTEM SECURITY
Power must be delivered reliably.
Within the constraints placed on the system operation by reliability consideration, the system will be operated most economically.