基于双环控制的光伏制氢变流器设计与仿真

Design and simulation of photovoltaic hydrogen production converter based on dual-loop control

变流器是实现光伏发电适用于制氢系统的重要器件,因此,研究变流器相关技术具有十分重要的使用价值和理论意义。该文研究了光伏制氢变流器及双环控制方法。首先,根据光伏制氢系统要求分别计算Boost电路和Buck-Boost电路的元件参数。然后,设计了光伏发电模块的控制回路,通过控制Boost电路中IGBT的导通和关断来升高光伏阵列的输出电压,使其能够达到最大功率点。设计基于电流环和电压环相结合的双环控制策略,控制电路中开关的导通和关断,保证系统输出电压和功率的稳定。储能模块的控制回路通过控制Buck-Boost电路中IGBT的导通和关断,实现蓄电池的充电和放电使得母线电压保持稳定。蓄电池的控制回路采用双环控制,使得光伏制氢系统的控制精度更高。完成设计后搭建光伏制氢系统仿真模型,观察系统在不同情况下的输出波形,验证设计的可行性。

Converters are important devices for achieving photovoltaic power generation suitable for hydrogen production systems.Therefore,studying converter related technologies has significant practical value and theoretical significance.This article studies the photovoltaic hydrogen production converter and the dual loop control method.Firstly,calculate the component parameters of the Boost circuit and the Buck Boost circuit according to the requirements of the photovoltaic hydrogen production system.Then,the control circuit of the photovoltaic power generation module was designed to increase the output voltage of the photovoltaic array by controlling the on and off of the IGBT in the Boost circuit,enabling it to reach the maximum power point.Design a dual loop control strategy based on the combination of current loop and voltage loop to control the conduction and shutdown of switches in the circuit,ensuring the stability of system output voltage and power.The control circuit of the energy storage module controls the on and off of the IGBT in the Buck Boost circuit to charge and discharge the battery and maintain stable bus voltage.The control circuit of the battery adopts dual loop control,which makes the control accuracy of the photovoltaic hydrogen production system higher.After completing the design,build a simulation model of the photovoltaic hydrogen production system,observe the output waveform of the system under different conditions,and verify the feasibility of the design.