基于二阶最佳原理光伏充电控制系统的理论研究

光伏充电控制系统是光伏发电系统中重要组成部分,DC/DC变换是充电控制器的主回路,其电压、电流控制是一个双环反馈控制系统.采用电流内环、电压外环的双闭环控制方式,建立光伏充电控制系统数学模型,应用连续时间系统的工程设计方法,研究了电流环中的电流校正装置,将电流环简化为电压环中的一个比例环节,并与其他环节一起构成外环电压...

Theoretical Research on Photovoltaic Charge Control System Based on Second-order Optimization Principle

The photovoltaic charge control system is an important part of the photovoltaic system,in which the DC/DC conversion is the main circuit of the charge controller and the voltage,and current control is a double-loop feedback control system.In this paper,a dual closed loop control scheme including the inner current loop and outer voltage loop control was adopted to establish a mathematical model for photovoltaic charge control system.On the basis of the model,an engineering design approach of the continuous-time system was applied to the research of the current correction device in the current loop.The current loop was simplified as a proportion link in the voltage loop,and was constituted the control object of the outer voltage correction devices together with the other links.By the use of the voltage to control current,the transfer function of the current and voltage correction devices was obtained.Simulation results showed that corrected system met the requirements of second-order optimization principle.