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With the wind farm power system frequency stable homotopy Function Analysis

Author: WuJiKai
Tutor: JiangHui
School: Hunan University
Course: Electrical Engineering
Keywords: Wind Power Frequency stability Eigenvalue analysis Homotopy function
CLC: TM614
Type: Master's thesis
Year: 2008
Downloads: 300
Quote: 2
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Abstract


Wind Power With its green , abundant resources, easy to develop , cost advantages have been gradually improving world wide attention , is the world's fastest growing renewable energy. As the proportion of wind power in the grid continuous improvement , constant fluctuations in wind power output This feature makes with wind power system stability becomes increasingly important. Especially in the wind power system is subjected to large disturbances , due to the destruction of the active power balance , the system is bound to have some impact on the frequency stability characteristics . The purpose of this paper is to wind power system frequency stability analysis provides an effective way. Eigenvalue analysis method is a method used to analyze the stability of complex nonlinear dynamical systems approach ; homotopy function characterizes the dynamic system coupling between topological spaces , performing eigenvalue analysis can be used to determine the characteristic values ​​of wind power systems corresponding to the specific state variables. This article will introduce the homotopy function to the wind power system frequency stability analysis in the past. First, constant speed wind turbines and double-fed wind turbine principles and characteristics are discussed, on this basis, to establish a unified power system with wind farms frequency stability analysis of the mathematical model ; Then this frequency stability of the power system analysis methods are discussed , focusing on the Lyapunov stability theory evolved from the characteristic value analysis . Then a detailed analysis of the homotopy function and its application in wind power system eigenvalue analysis applications, that the function can be used to distinguish the homotopy eigenvalue corresponding state variables , in particular the frequency associated with the system state variables , in order to more accurately perform frequency stability eigenvalue analysis . Finally, with constant double-fed wind turbine and wind turbine power system , using characteristic values ​​and with the homotopy analysis method to identify the function of the frequency stability characteristics to achieve the results of comparison and analysis. Simulation results show that with double-fed wind turbine power system has better frequency stability.

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Variety of power generation > Wind power
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