电解电容器特征参数提取方法研究

Parameter identification of power electronic circuit

研究电解电容器特征参数提取技术,提出了一种基于有限差分法与遗传算法的电解电容器特征参数提取方法,该方法可通过设置监测信号求得电解电容器特征参数值。以Buck-Boost电路为例,建立了电路模型,选择电感流经电流和电路输出电压作为监测信号,利用有限差分法对监测信号进行初步处理,然后结合遗传算法对电解电容器特征参数进行提取。实验结果表明,新方法能够有效实现电解电容器特征参数的提取。

Parametric identification method of power electronic circuits is studied in this paper.The electrolytic capacitors feature parameters can be obtained by setting the monitoring signals based on this method.The new method based on finite difference method and genetic algorithm for the parameter identification of power electronic circuits is proposed.Taking the Buck-Boost converter circuit as an example,the parameter identification of power electronic circuits is achieved.Firstly,the Buck-Boost converter’s transfer function model is established.Secondly,the output voltage and the inductor input voltage are selected as monitoring signals.The finite difference method is used to preliminary calculate and the genetic algorithm is used to estimate the circuit’s parameter.The experimental results show that the new method can be effectively applied in the parameter identification of power electronic circuits.