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Cascading failures typically involve a wide variety of power system dynamic phenomena, including cascading transmission line overloads, generator tripping, voltage collapse and/or rotor dynamic instability. Metrics that estimate proximity to critical points with respect to any of these phenomena could be useful as indicators of cascading failure risk. With the growing deployment of phasor measurement...
We introduce a new microscopic model of the outages in transmission power grids. This model accounts for the automatic response of the grid to load fluctuations that take place on the scale of minutes, when the optimum power flow adjustments and load shedding controls are unavailable. We describe extreme events, initiated by load fluctuations, which cause cascading failures of loads, generators and...
This paper deals with the use of system identification techniques for estimating low-order black-box state-space models formodal analysis. It presents a method to estimate state-space models for large power systems with many controllable devices from noisy measurements. To excite the system low-energy pulses generated by the controllable devices are used. The input signals are the controllable set-points...
We describe short-term swing dynamics leading to cascading failure in an interconnected power system. The notion of Coherent Swing Instability (CSI) was recently proposed in which most of synchronous machines in a power system coherently lose synchronism with the rest of the system after being subjected to a local and finite disturbance. CSI is an escape phenomenon from resonance in the nonlinear...
Autonomous shipboard electric power system operation is one of the major goals in order to ensure safe, reliable and economic system operation. Integrated electrical power systems need to be capable of redistributing power almost instantly in order to supply both non-propulsion and propulsion shipboard electrical loads. The dynamics of the power systems require differential-algebraic equations along...
Wide-area monitoring and control system complements the classical protection systems and overcomes their drawbacks. In such systems a dynamic view of power system, using synchronized measurements in short time intervals, smaller than 20 ms, is available. This new kind of system's information provides a novel preventive control action to prevent system's large disturbances. This paper proposes a new...
Continuous advances in terms of the capability of modern computers allow the development of power systems analysis tools that takes into consideration aspects that are usually neglected for power flow calculation. Examples are detailed models for generators, turbines, speed and voltage controllers that are usually over-simplified, flexible AC transmission systems devices, induction generators, dynamic...
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