FPGA-based solar grid-connected inverter

Abstract

The invention discloses an FPGA-based solar grid-connected inverter. The FPGA-based solar grid-connected inverter comprises an FPGA, a phase tracking module, an input undervoltage output overcurrent protection module, a triangular wave, a voltage and current control loop, an SPWM generation module, a full bridge inverter, a PWM, an AD conversion control, an AD conversion chip and a DC-DC, the FPGAis installed on a data collection chip; the AD conversion chip transmits the electric supply after processing to the phase tracking module; the AD conversion chip transmits a filtering inductive current after processing to the voltage and current control loop; the AD conversion chip transmits an inverted output voltage after processing to the phase tracking module; the AD conversion chip transmits an DC-DC output voltage after processing to the PWM and outputs the DC-DC output voltage to the DC-DC; the phase tracking module transmits the information after processing to the voltage and currentcontrol loop; the voltage and current control loop feeds back the information to the SPWM generation module; and the SPWM generation module generates a triangular wave to achieve full-bridge inversion. The FPGA-based solar grid-connected inverter is good in conversion effect and high in device protection performance.

Description

technical field [0001] The invention belongs to the technical field of solar grid-connected inverters, and in particular relates to an FPGA-based solar grid-connected inverter. Background technique [0002] In order to realize the grid-connected power supply of the low direct current energy on the solar cell, an inverter device is required, which is required to convert the low direct current into a sinusoidal alternating current with the same amplitude, frequency and phase as the grid voltage. In order to ensure reliable grid-connected power supply. The main part to realize the inverter is the inverter controller. [0003] The current solar grid-connected inverter has poor conversion effect and great harm to equipment. [0004] Therefore, it is very necessary to design a solar grid-connected inverter based on FPGA. Contents of the invention [0005] The purpose of the present invention is to provide an FPGA-based solar grid-connected inverter to solve the problems of po...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a solar grid-connected inverter based on FPGA to solve the problems of poor conversion effect and great harm to equipment of the current solar grid-connected inverter proposed in the above-mentioned background technology

Images