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More and more electric power data are generated with the development of the electric power field. Hyponymy relationships extraction is an important task in building semantic knowledge base, information retrieval and other semantic applications etc. This paper uses sentences to match “is a” pattern as research subjects and proposes a novel hyponymy relation extraction approach, which combines lexical...
This paper discusses the demand side impact on electricity market. The demand reduction of common commodities usually leads to reduced price, and in response to the high price, demand side management may be a good price mitigation mechanism for most commodities. However, in the electricity market, electricity demand has complicated interactions with the electric network, and the demand at different...
Numerical integration, or time domain simulation, is an important tool to study dynamical systems. Many dynamical systems are stiff, for instance, electric power systems consist of a variety of components with greatly different time scales. Although explicit integration methods are computationally efficient, they are not commonly used for studying stiff systems, because these methods may have numerical...
The continuation of the invariant subspaces algorithm combined with the projected Arnoldi method is presented to trace the critical (right-most or least damping ratio) eigenvalues for the power system stability analysis. A predictor-corrector method is applied to calculate the critical eigenvalues trajectories as power system parameters change. The method can handle eigenvalues with any multiplicity...
Dynamical simulation or numerical integration is an important tool used to study dynamical systems. For electric power systems, dynamical simulation is used for analyzing power system dynamics with respect to aspects such as stability and control. For stiff systems, implicit algorithms are typically used to obtain numerical stability, but these are inefficient compared with explicit methods. A hybrid...
The continuation of invariant subspaces algorithm combined with projected Arnoldi method is presented to trace the critical (rightmost or least damping ratio) eigenvalues for the power system stability analysis. A predictor-corrector method is applied to calculate the critical eigenvalues trajectories as power system parameters change. The method can handle eigenvalues with any multiplicity and very...
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