Voltage type single-stage multi-input non-isolated inverter provided with series simultaneous option switches

Abstract

The invention relates to a voltage type single-stage multi-input non-isolated inverter provided with series simultaneous option switches, the circuit structure of the inverter is formed by connectionof a plurality of input filters which are not common ground and one common output filter through a multi-input non-isolated inverter circuit with series simultaneous option power switches, each inputend of the multi-input non-isolated inverter is connected with the output end of each input filter one by one, and the output ends of the multi-input non-isolated inverter are connected with the inputends of the output filters. The inverter has the advantages that multiple input sources are not common ground, simultaneous or time-sharing power supply can be realized, output and input are not separated, the output filters are not shared, the circuit topology is concise, single-stage power conversion is realized, the power density is high, the output voltage ripple is small, the application prospect is wide and the like, and a key technology is laid for the high-capacity distributed type power supply system which is powered-up jointly by various new energy resources.

Description

technical field [0001] The invention relates to a series-selected switching voltage type single-stage multi-input non-isolated inverter, which belongs to the power electronic conversion technology. Background technique [0002] The inverter is a static converter device that uses power semiconductor devices to convert an unstable and inferior DC power into a stable and high-quality AC power for AC loads or AC grid connection. Inverters with or without electrical isolation between the output AC load or the AC grid and the input DC power supply are called isolated and non-isolated inverters, respectively. Non-isolated inverters have the characteristics of simple circuit structure, high reliability, large output capacity, and low cost. application value. [0003] New energy sources such as solar energy, wind energy, tidal energy, and geothermal energy (also known as green energy) have the advantages of clean, pollution-free, cheap, reliable, and abundant, so they have broad ap...

AI Technical Summary

Problems solved by technology

The distributed power generation system realizes multiple input sources simultaneously supplying power to loads and prioritizing the utilization of energy, which improves the stability and flexibility of the system, but there are defects such as two-stage power conversion, low power density, low conversion efficiency, and high cost. Its practicality is limited to a large extent

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