基于Matlab/Simulink含风电的电力系统混沌特性研究

Study on Chaos Characteristic of Wind Grid-connection Power System Based on Matlab /Simulink

随着风力发电系统的规模逐渐增大及并网运行,风电并网引起的电力系统稳定性问题也日益引起重视。提出一种在Matlab环境下对风电并网的电力系统进行分析的方法,根据实际系统在Simulink环境下建立仿真模型,设置仿真参数并进行仿真。根据仿真结果,可以画出系统的运动轨迹相图,同时从定性和定量两方面采用功率谱、饱和分维数和Lyapunov指数来判断并网电力系统的非线性混沌特性。

With the increasing of the scale of wind power generation system and tend to parallel operation, the stability problem of power system caused by wind power grid-connection is increasingly been attached importance. A new scheme using Matlab to analyze power system with wind is proposed. According to the real system, the model of Simulink can be established and the necessary parameters can be set. The outputs of simulation can be utilized to plot the phase portraits directly, and further more power spectrum can be produced by employing fast Fourier trans- formation. Whether or not the system exists chaotic motion will be determined by phase portraits, power spectrum, Largest Lyapunov exponent and correlation dimension analysis based on time series using Matlab.