Design of Microgrid Photovoltaic Inverter Based on STM32

How does a STM32 microprocessor work?

The inverter adopts a two-stage conversion structure. The high-speed timer of the STM32 microprocessor generates high-resolution PWM and SPWM pulses and drives the first-stage DC/DC convertor after driving the chip through UCC27324 and IR2111 respectively.

Which microprocessor is used in a 500W photovoltaic inverter?

In this paper, the STM32 microprocessor is used as the central control core, and a 500W photovoltaic inverter is designed. The inverter adopts a two-stage conversion structure.

How does the stm32f103xx microcontroller work?

The grid current feedback signal is obtained using a Hall effect sensor while the grid voltage sensing is performed using a voltage transformer. The two signals are then reported to the 0/3.3V voltage range required by the A-D converters of the STM32F103xx microcontrollers, by means of standard circuitry based on operational amplifiers.

Which microcontroller is suitable for a single-panel PV generation system?

The converter performs MPPT and grid connection by means of an ARM Cortex-M3 based microcontroller (STM32F103xx), which is well proven to be perfectly suited for PV applications. Simulation and experimental results have confirmed the consistency of the proposed solution for single-panel PV generation systems. Table 8. Document revision history

Which microcontroller is used for MPPT & grid connection?

The converter performs MPPT and grid connection by means of an ARM Cortex M3-based STM32F103xx microcontroller, which is proven to be well suited for such an application. In fact, the implemented DQ axis control scheme shows excellent regulation of both active and reactive power, as is also required for low power applications in the near future.

What is a dual-stage inverter for grid-connected applications?

Table 1. The dual-stage inverter for grid-connected applications includes a DC-DC converter to amplify the voltage and a DC-AC inverter to control the current injected into the grid. Figure 3. The DC-DC converter is depicted in Figure 3 together with the DC-AC converter and LCL filter.