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Mathematical models of a mechanical system in the time and frequency areas, which are realized by various software complexes, are considered. The results of identification of the experimental amplitude-frequency characteristic using the software complex IMS-I are presented. It is established that the design analysis method, in which one natural frequency (one mode) is considered does not provide the...
As more renewable energy resources connected by power electronics and gas-fueled generators are integrated into power grids, total system inertia has been significantly decreasing in recent years. The resulting decline in system primary frequency response threatens the reliability and stability of power grids. This paper aims to study the locational dependence of the impacts of inertia on system primary...
The paper examines two major implementations of inertial response in variable-speed wind turbine generators. Through time-domain simulations, these supplementary loops are compared based on their impact on grid frequency and the wind plant. Testing is performed on an isolated, hydro-dominated power system benchmark, to which a DFIG-based wind plant is connected. The results show that when these implementations...
A method is proposed in this paper to select the global input signals for Wide-area PSS to damp inter-area oscillations in large power systems. By analyzing the observability of interarea mode, the two important concepts of dominated mode and group are connected with each other. And according to two-group mutual oscillating feature and unit coherency characteristic of inter-area oscillation, the inertia...
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