基于模态摄动法的电力系统动态模型降阶分析

对具有多台发电机和复杂电力网的电力系统进行运行分析与控制中．当考虑系统非线性的暂态过程时，常常面临高阶数学模型，给系统的分析和计算带来困难。模态摄动降阶法通过合理选择重要状态变量及相应的主导特征值，可以成功地将高阶电力系统降价。从理论上推导了逐次降阶方程，并以简单电力系统模型应用模态摄动法为例，从建模、降阶实现、效果分析验证了模态摄动法可获得较好的降阶效果.

Order reduction of power system dynamic model using mode act

When considering the nonlinear transient process in the operation analysis and control of power system with multiple machines and complex network,high order mathematical model always occurs,which brings difficulties to system analysis and calculation. Mode act order reduction method is introduced for it by proper selecting the significant state variables and their corresponding dominant eigenvalues. The successive order reduction equations are deduced in theory. With a sim- ple power system model as an example,its effect is demonstrated from the modeling,order reduction implementation and results analysis.