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The paper introduces a new method to early identify the critical machine cluster (CMC) after a transient disturbance. For transient stability assessment with methods based on the equal area criterion it is necessary to split the generators into a group of critical and non-critical machines. The generators in the CMC are those likely to lose synchronism. The early and reliable identification of the...
We study the application of cyber-physical hierarchy on a class of smart grid systems to improve scalability. Our framework employs a multi-agent flocking-based approach to study the transient stability problem in emerging power systems. An agent in this context embodies a coherent group of system generators. We demonstrate how our paradigm conveniently facilitates the identification of coherent machine...
Accurately forecasting out-of-step section is very important to the correct action of out-of-step splitting devices. By analyzing the phase-angle difference change feature of branch in different location of network in time of one machine-infinite system losing stability, it is pointed out that out-of-step section only can occur in the middle part of lines between groups or vicinity. For complicated...
The effect of increasingly detailed turbine??generator representation on calculated system stability limits is discussed. A new computer program which permits transient saliency, flux linkage variation caused by armature current, saturation, machine and system damping, the speed-governor system, and the excitation system to be represented is compared to previous computing methods. Swing curves and...
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