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This paper presents a solution of optimal power flow (OPF) incorporating wind power. A paradigm for modeling the cost of wind-generated electricity from a wind farm is proposed. Based on the Weibull wind speed distribution and wind turbine model represented by function approximation, the frequency distribution of wind farm power output to be the basis for modeling wind generation cost is established...
With the integration of large-scale wind farm of direct-driven permanent magnet synchronous generator (PMSG) type into power systems, the impacts on the existing power system have to be evaluated elaborately and systematically. This paper will discuss the impact of grid-connected wind farm of PMSG type on power system small signal stability. First, a simplified practical model of wind farm of PMSG...
With introduction of smart grid concept, how to face up to the impacts of grid-connected renewable energy sources, especially like wind power on power systems becomes one of the most important issues in development of smart grid. This paper will discuss the potential challenges the smart grids will confront with respect to large wind generation intermittence and fluctuation from a technical point...
The probabilistic small signal stability analysis (PSSSA) considering uncertainty and randomness of wind generation is conducted in this paper. Firstly, the small signal model for wind farm with Doubly-fed Induction Generator (DFIG) type is presented. The stator flux-oriented vector control based method is utilized to implement stator active and reactive powers control in modelling rotor-side converter...
The transient stability evaluation of power system with consideration of large-scale grid-connected wind farms of Doubly-fed Induction Generator (DFIG) type was elaborately discussed in this paper. In accordance with an equivalent generator/converter model, the comprehensive numerical simulations involving multiple wind farm connections were carried out to reveal the impacts of wind farm on dynamic...
A new COI-based backstepping sliding-mode method for emergency frequency control of interconnected AC/DC power systems is proposed in this paper. It aims to provide inter-area power support to the disturbed control area(s) through the intact interconnecting structure under emergency conditions, when the normal Automatic Generation Control (AGC) is suspended to avoid worsening frequency stability....
In this paper, the doubly-fed induction generator (DFIG) for transient stability evaluations of power systems was systematically discussed, and the impacts of grid-connected large DFIG based wind farms on power system transient stability were then studied in detail. In the modeling of DFIG, an equivalent generator model was employed to reflect the combined behavior of the DFIG and its rotor converter...
A transient stability on-line forecasting algorithm, based on PMU measurements and EMS models, is proposed in this paper. This algorithm makes full use of both fast speed of PMU measurements and detailed models of EMS, which could deal with the situations with single fault or cascading faults. Several main factors that affect the accuracy of the forecasting algorithm are studied, and a binary search...
A task level intelligent computing architecture, called as smart workstation cluster distributed parallel computing model, is presented for transient stability constrained total transfer capability (TTC) evaluation of large scale interconnected power system with respect to a specified contingency set. The proposed intelligent distributed parallel computing mode can effectively integrate the heterogeneous...
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