Solar photovoltaic Grid-connected Key Technology

摘要

In order to solve the problem of solar energy photovoltaic grid technology, a kind of photovoltaic grid-connected simulation device based on FPGA was designed. It consists of FPGA, auxiliary fly-back switch power, full-bridge DC/AC converter, LC filter and some protecting circuit etc. The device has high speed of MPPT adjustment and tracking of frequency and phase, with frequency ranging from 30Hz to 55Hz, deviation is below 0.4%, stability is above 99.6%, converting efficiency is up to about 80%.