Robust fault detection in the load-frequency control of interconnected power systems

This paper presents a robust approach to detecting and identifying a fault in the load-frequency control loop of interconnected power systems. Although the approach is applicable to N-area systems, a two-area example is considered for simplicity. The approach is capable of detecting faults in real time and under real life operating conditions. The detection of faults is robust in that it takes place in the presence of unknown load and other external disturbances, such as plant and sensor noises