Performance simulation of active power factor correction system based on Simulink
In power systems, power factor is one of the important parameters for evaluating the power quality and efficiency of a circuit. Power factor correction is a common technology used to improve the power factor in power systems to improve energy efficiency and reduce energy losses. In this article, we will introduce how to use the Simulink tool in Matlab to perform performance simulation of a Simulink-based active power factor correction system.
System Architecture:
Our active power factor correction system consists of three main components: power supply, power electronics converter and control system. Power is the input to the system and can be either AC power or DC power. Power electronic converters are used to convert the input power into the required output voltage and current and implement power factor correction through the control system.
Establishment of Simulink model:
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Power supply model:
We can simulate the power supply using voltage source or current source in Simulink. Select AC power supply or DC power supply according to the actual situation, and set its voltage or current value. -
Power electronic converter model:
In active power factor correction systems, a commonly used power electronic converter is a controlled rectifier. We can use the Rectifier block in Simulink to model power electronic converters. Based on actual needs, select the appropriate rectifier type and parameters and connect it to the power supply model. -
Control system model:
The control system is a key component of the active power factor correction system, which is used to monitor the power factor of the circuit and adjust the working status of the power electronic converter as needed. We can use the control system toolbox in Simulink to build a control system model. Common control strategies include closed-loop control based on PI controller and advanced control based on model predictive control (MPC). An appropriate control strategy is selected based on the actual requirements and connected to the power electronics converter model.
Performance simulation:
After completing the model, we can perform performance simulation to evaluate the performance of the active power factor correction system. Before simulation, we need to define the simulation time and simulation parameters. Set the simulation time according to actual needs