Photovoltaic grid-connected system based on FPGA and realization method thereof

Abstract

The invention discloses a photovoltaic grid-connected system based on an FPGA and a realization method thereof. The system comprises following apparatuses: a photovoltaic cell PV, a voltage-stabilizing capacitor, a DC / DC converting circuit, a direct current bus, a DC / AC full-bridge inverter, a core controller FPGA, an alternating current power grid and power supply device, a Web server, and a computer or a mobile terminal etc., the core controller FPGA employs a heterogeneous double-core mode, core-1 generates PWM driving signals of the pre-stage DC / DC converting circuit and the post-stage DC / AC full-bridge inverter and maximum power point tracking (MPPT) control signals, and core-0 performs functions of network service, a database, and remote monitoring etc. through a Linux system. The system and the realization method thereof are advantageous in that the heterogeneous double-core FPGA can process tasks in parallel, flexible combination of various functions is realized, and the operation efficiency of the system is improved; the expansion of the double-core system is easy, high processing performance can be combined with small size, and the system with the appearance is also advantaged by low power consumption and low heat generated by calculation of the power consumption.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to an FPGA-based photovoltaic grid-connected system and an implementation method thereof. Background technique [0002] With the rapid consumption of global energy reserves, the supply of traditional energy sources such as coal, oil, and natural gas has become increasingly tight. In order to alleviate the energy and environmental crisis, the development and utilization of primary renewable energy sources such as wind energy and solar energy have received high attention. In the past ten years, the solar photovoltaic industry has developed rapidly, and the total installed photovoltaic capacity has shown an explosive growth trend worldwide. In 2013 alone, the global photovoltaic installed capacity increased by 38.7GW, and the total installed capacity reached 140.6GW. The photovoltaic industry has entered a new period of development. [0003] At the same time, a series of photovolt...

AI Technical Summary

Problems solved by technology

Secondly, the control signals of DC and AC converters are often generated by the voltage and current double closed-loop PI control method. This method is simple to implement, but it depends on the error of the controlled quantity, and its control speed and robustness need to be improved.

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