利用微控制器实现恒压或恒流变负载的直流微电网控制研究

Research on DC Microgrid Control Using Microcontroller to Realize Constant Voltage or Constant Current Variable Load

[目的]为了在不同类型的负载条件下实现恒压或者恒流的微电网控制。[方法]使用微控制器和其他电路元件搭建一个简易直流微电网,采用闭环PID控制器对电路进行控制,同时搭建Simulink仿真模型,利用仿真模型对PID参数进行设计和提前模拟仿真,可以让PID参数设置合理,减少微电网中硬件出现安全隐患,保证了在硬件搭建过程中电路各部分的正常工作。[结果]由实验数据可知,在恒压或恒流输出方面都可以保证输出值误差在2%以下。[结论]研究证明了使用微控制器来对微电网电压电流控制的可行性。

[Introduction]The paper aims to realize constant voltage or constant current microgrid control under different types of load conditions.[Method]A simple DC microgrid was built by using a microcontroller and other circuit components,a closed-loop PID controller was used to control the circuit,and a Simulink simulation model was built at the same time,and the PID parameters were designed and simulated in advance using the simulation model.It could make the PID parameter setting reasonable,reduced the hidden danger of hardware in the microgrid,and ensured the normal operation of each part of the circuit in the process of hardware construction.[Result]It can be seen from the experimental data that the output value error can be guaranteed to be less than 2%in terms of constant voltage or constant current output.[Conclusion]The feasibility of using a microcontroller to control the voltage and current of the microgrid is demonstrated in this paper.