Multi-port converter based on five-terminal impedance network, and new energy system

Abstract

The invention discloses a multi-port converter based on a five-terminal impedance network, and a new energy system. The multi-port converter comprises a diode, a first switching tube, a second switching tube, a first inductor, a second inductor, a first capacitor, a second capacitor and a third capacitor; the diode is connected with a power supply module, and the diode is also connected with the first end of the first inductor and the first capacitor separately; the second end of the first inductor is connected with the first end of the second capacitor and the first end of the first switching tube separately; the second end of the first switching tube is connected with the first end of a load or a power grid and the first end of the second switching tube separately; the second end of the second switching tube is connected with the third capacitor, the first end of the second inductor and the positive electrode of an energy storage apparatus separately; the second end of the second inductor is connected with the negative electrode of the energy storage apparatus, the second end of the second capacitor and the negative electrode of the power supply module separately; and the third capacitor is connected with the second end of the load or the power grid and the first capacitor separately. The multi-port converter is simple in structure, easy to control, high in working efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a multi-port converter based on a five-terminal impedance network and a new energy system. Background technique [0002] With the maturity of new energy technology, a large number of new energy systems have been put into power applications, and users have higher and higher requirements for the efficiency and safety of power electronic circuits in new energy systems. [0003] In practical applications, new energy systems have the problems of low output voltage and intermittent voltage output. Such as figure 1 , figure 2 as shown, figure 1 A structural schematic diagram of a new energy system provided for the prior art, figure 2 Schematic diagram of the structure of another new energy system provided for the existing technology. [0004] In order to solve the problem of low output voltage of the new energy system, the existing technology additionally adds a DC / DC c...

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Problems solved by technology

[0006] It can be seen that the existing technology uses three converters to solve the problem of low output voltage and intermittent voltage output of the new energy system, which makes the whole new energy system have problems of increased circuit stages, high cost, complex circuit structure, difficult control and low efficiency. question

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