Off-line phase split device and inverter system

Abstract

The invention provides an off-line phase split device and an inverter system. In an embodiment, the off-line phase split device comprises a first input port, a second input port, a first output port,a second output port, a third output port, a first capacitor, a second capacitor, a first switch circuit, a second switch circuit, a first node and an inductor, wherein the first input port and the second input port are respectively connected with a first phase port and a second phase port of a power supply, the first output port and the second output port are used for providing a second voltage for a first load, the second output port and the third output port are used for providing a third voltage for a second load, the first capacitor is connected between the first output port and the second output port, the second capacitor is connected between the second output port and the third output port, the first switch circuit and the second switch circuit are connected in series between the first input port and the second input port and are unidirectionally conducted along opposite directions, the first node is arranged between the first switch circuit and the second switch circuit, and the inductor is connected between the first node and the second output port.

Description

technical field [0001] The invention relates to the technical field of inverters, in particular to an off-grid phase splitter and an inverter system. Background technique [0002] Inverters are power systems that convert DC power into AC power, and are widely used in new energy power generation industries such as photovoltaics. As the core equipment for power generation, the inverter inverts the optimized DC of photovoltaic modules into AC, and then chooses to transmit power to the grid (grid-connected) or load power supply (off-grid). Such as figure 1 An inverter system in the prior art shown generally has three power ports: a DC input port, a battery port and an AC output port, corresponding to three main operating modes, namely: inverter of solar DC power inputted by DC When the utility power fails, the DC power at the battery port is converted into AC power, which is output from the AC output port to supply power to the load; the DC input solar DC power is converted to...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of this application provides an off-grid phase splitter and an inverter system. Through the off-grid phase splitter provided by this application, the power supply requirements for different load systems are realized; at the same time, the transformer of the inverter system is replaced The off-grid phase splitter provided for this application can solve the problem of excessive volume of the inverter system due to the existence of the transformer and the safety hazards of burning the insurance or sticking the relay due to the surge current

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