Multi-input rectifying circuit for distributed power generation

Abstract

The invention discloses a multi-input rectifying circuit for distributed power generation, which is formed by connecting n rectifying units, wherein n is not less than 2; each rectifying unit comprises a bridge type rectifier, a second diode and a semiconductor switch; an alternating current input end of each bridge type rectifier is connected with a group of independent alternating current power supply; a positive output end at a direct current side is connected with one end of each semiconductor switch; a negative output end at the direct current side is connected with a positive electrode of the second diode; a negative electrode of the second diode is connected with the other end of the semiconductor switch and used as a positive output end of the rectifying unit; the second diodes of the n rectifying units are connected in series in sequence by the same polarity; positive output ends at the direct current sides of the bridge type rectifiers of adjacent rectifying units are respectively connected together through first diodes; and the polarities of the first diodes are consistent with the second diodes in the rectifying units. The rectifying unit has simple structure, can output relatively-stable direct current voltage under the condition that the input voltage substantially changes by dynamically changing an electric connecting structure of the rectifying units in the running and is applicable for a small-scale wind driven generator group.

Description

technical field [0001] The invention relates to a multi-input rectifier circuit for distributed power generation, which is suitable for power conversion devices for distributed power generation with large input voltage range changes, especially for wind power generation occasions. Background technique [0002] In recent years, affected by global climate change and rising oil prices, the use of renewable energy, including wind energy, solar energy, and biomass energy, has attracted the attention of the international community. Many countries have put forward clear development goals, making renewable energy utilization technologies keep improving. [0003] One of the difficulties in the utilization of renewable energy is that the input power varies widely. Therefore, for distributed power generation equipment, the first thing to face is that it needs to have good performance under a wide range of input voltages. For example, in actual wind power generation equipment, the win...

AI Technical Summary

Problems solved by technology

However, the use of conventional voltage regulation circuits not only increases the cost, but also lowers the efficiency, and its adjustment range is very limited.

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