【摘要】 针对基于推挽正激电路的数字光伏模拟器尚缺乏系统的控制器参数设计方法的问题,在介绍数字光伏模拟器总体结构及工作原理的基础上,利用状态空间平均法,建立推挽正激电路及系统的数学模型;针对负载电阻RL随系统的工作点变化导致控制器参数难以确定的问题,采用零极点对消技术和通过对以ki和RL分别为变量的根轨迹性能分析及频率特性分析,进行系统化的控制器参数设计,并进行稳态和动态性能实验验证。实验结果表明,基于状态空间平均法建模所设计的控制器参数应用到实际系统中具有良好的动态和稳态性能,使光伏模拟器具有有效工作范围宽、稳态精度高、控制性能好的优点,从而可验证所论数字光伏模拟器建模与控制器参数设计的正确性和可行性。更多还原

【Abstract】 In order to solve the problems of lacking systematic design method of the controller parameters for digital PVsimulator based on push-pull forward circuit,the mathematic models of push-pull forward circuit and the digital PVsimulator were established by the state-space averaging method based on the introduction of its overall configuration andworking principle. In order to solve the problem that load resistance RLchanging with operating point of PV simulatorleads to the difficult controller parameter design,pole-zero cancellation technique is employed and then its controllerparameters are systematically designed by the performance analysis of Root Loci of the closed current loop with kiand RLas variables and frequency response analysis for the simulator. The stationary and dynamic performances of the digital PVsimulator are tested by experiments. Experimental results showed that when the controller parameters designed accordingto state-space averaging model are applied to the PV simulator,its satisfactory dynamic and stationary performances areobtained,and make it have the merits of wide effective working range,high steady-state accuracy and good controlperformances,so that the modeling and controller parameter design of digital PV simulator based on push-pull forwardcircuit proposed is correct and feasible.更多还原