High-efficiency bi-directional conversion circuit for new-energy power generation and control method thereof

Abstract

The invention discloses a high-efficiency bi-directional conversion circuit for new-energy power generation and control method thereof. The high-efficiency bi-directional conversion circuit is composed of a full-control switch device K0, a full-control switch device K1, a full-control switch device K2, a conversion switch S0, a conversion switch S1, an isolation circuit, an isolated / non-isolated selector switch S2, a capacitor C0, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2, a diode D0, a diode D1, a diode D2, an interface 0, an interface 1, a contact 1, a contact 2, a contact S2_a, a contact S2_b, a contact a_1 and a contact b_1. A common end of the conversion switch S1 is connected with the inductor L1 and the capacitor C2, the contact 1 is connected with a new energy generation input interface, and the contact 2 is connected with the interface 1.With the conversion circuit, various energy conversion and management functions are realized; the cost of the conventional photovoltaic generation system is lowered; the overall efficiency of the system is improved; the overall size of the system device is reduced; and the power density ratio is enhanced. According to the circuit, flexible conversion between various working modes is realized. The circuit is suitable for application in various occasions.

Description

technical field [0001] The invention relates to a new energy power generation control conversion circuit technology, in particular to a high-efficiency bidirectional conversion circuit and control method for new energy power generation. Background technique [0002] With the increasing shortage of conventional fossil energy and the prominence of environmental problems, new energy, as a new type of renewable clean energy, has been paid more and more attention, and has been applied and promoted on a large scale. As important application forms of new energy power generation, solar power and wind power have developed rapidly in recent years, and their technologies have been constantly updated and improved. At the same time, because wind power and solar power generation are affected by environmental factors, there are certain fluctuations and randomness in their power generation output. In actual power generation engineering applications, it is often necessary to control and man...

AI Technical Summary

Problems solved by technology

However, due to the limitation of application requirements of some photovoltaic power generation systems, the conventional basic bidirectional Cuk cannot meet its application requirements well.

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