Unit Commitment Problem with the Aim of Increasing System Resilience

System resilience as a new concept in the power industry becomes important recently. This paper with consider to the rate of change of frequncey as a new system resilience index, introduces a resilient constraint unit commitment model to increase resilience against rare and severe events that ultimately lead to outages and frequency instabilities. This model offers an effective approach to solve unit commitment problem to prevent frequency instability by using optimal distributed generation switching problem, emergency interruptible load contracts and adaptive automatic frequency load shedding and when the event occurs, it places the system’s operating point in a stable state close to its optimal point. All simulation steps in the MATLAB software were conducted on 57-bus IEEE standard system. Simulation results of the proposed method, when compared with the conventional unit commitment approach without optimal distributed generation switching, imply the effectiveness of this innovative approach in the power system frequency stability enhancement.