Research on Automatic Grid Connected Distributed Photovoltaic Inverters
Solar inverter is an important part of photovoltaic power generation.Its main function is to convert the DC power generated by photovoltaic modules into AC power.Based on the research of distributed photovoltaic power genera-tion Grid-tie inverter,an inverter circuit with a new control mode is designed.At the same time,the grid voltage signal and inverter voltage signal are collected,and the control signal is generated through the high-speed comparator circuit.The special Field-effect transistor driving chip IR2113 drives the H-bridge inverter circuit,and the sinusoidal AC voltage is obtained through LC filtering.By adjusting the inverter voltage through hardware circuits,the power grid voltage is automatically tracked to ensure that the inverter output voltage is always in the same frequency and phase as the power grid,thus achieving automatic grid connection operation function.The test results show that the low-cost automatic grid connected distributed Solar inverter with overvoltage and overcurrent protection features is safe operation,high efficiency and excellent performance.
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