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

A selective switch, multi-input technology, applied in the field of power electronic conversion, series-selective switch voltage type single-stage multi-input non-isolated inverter, can solve the problems of two-stage power conversion, low conversion efficiency, practical limitations, etc. Achieve the effect of large output capacity, high conversion efficiency and simple circuit topology

Inactive Publication Date: 2018-06-12
QINGDAO UNIV
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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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  • Voltage type single-stage multi-input non-isolated inverter provided with series simultaneous option switches
  • Voltage type single-stage multi-input non-isolated inverter provided with series simultaneous option switches
  • Voltage type single-stage multi-input non-isolated inverter provided with series simultaneous option switches

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Embodiment Construction

[0031] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

[0032]The series simultaneous selection switch voltage type single-stage multi-input non-isolated inverter is composed of a multi-input single-output high-frequency inverter circuit connecting multiple input filters with different grounds and a common output filter. Each input end of the single-output high-frequency inverter circuit is connected to the output end of each input filter in one-to-one correspondence, and the output end of the multi-input single-output high-frequency inverter circuit is connected to the input end of the output filter , the multi-input single-output high-frequency inverter circuit is composed of a multi-channel series-connected simultaneous selection power switch circuit with output terminals connected in series in the forward direction, and a bidirectional power flow single-input...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02J3/32H02J3/38
CPCH02J3/382H02J3/385H02J3/386H02J3/387H02J3/32H02M7/48H02M1/0083Y02E10/56Y02E10/76
Inventor 陈道炼
Owner QINGDAO UNIV
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