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Novel photovoltaic off-grid and grid-connected inverter

An inverter device and photovoltaic technology, applied in photovoltaic power generation, circuit devices, AC network circuits, etc., can solve problems such as load power supply, reduced battery life, and narrow operating range of mains power, so as to reduce and prolong the charging and discharging switching frequency The effect of service life and strong environmental adaptability

Active Publication Date: 2017-01-11
FOSHAN BAYKEE NEW ENERGY TECH INC
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AI Technical Summary

Problems solved by technology

However, the existing off-grid photovoltaic inverter device has a narrow working range of mains power. When the mains voltage is low or high, the photovoltaic off-grid inverter device must be isolated from the grid, and the solar energy is supplemented by battery discharge. Insufficient board power, when the battery power is exhausted, it will not be able to supply power to the load, and frequent charging and discharging will also reduce the service life of the battery

Method used

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  • Novel photovoltaic off-grid and grid-connected inverter
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  • Novel photovoltaic off-grid and grid-connected inverter

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Embodiment Construction

[0031] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0032] The new photovoltaic off-grid inverter device of this embodiment includes a photovoltaic input module, a mains input module, a storage battery input module and an inverter output module, such as figure 1 As shown, it also includes a mode switching circuit 22 and a PFC boost circuit 23;

[0033] The output end of the mains input module is electrically connected to the mains input switch of the mode switching circuit 22, the output end of the storage battery input module is electrically connected to the battery input switch of the mode switching circuit 22, and the PFC boost circuit 23 The input end is electrically connected to the output port of the mode switching circuit 22, and the output end of the photovoltaic input module, the output end of the PFC boost circuit 23 are electrically connec...

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Abstract

The invention discloses a novel photovoltaic off-grid and grid-connected inverter, comprising a photovoltaic input module, a mains supply input module, a storage battery input module and an inversion output module, and further comprising a mode switching circuit and a PFC boosted circuit, wherein the mode switching circuit is used for controlling the on-off of the PFC boosted circuit and the mains supply input module and the on-off of the PFC boosted circuit and the storage battery input module. According to the novel photovoltaic off-grid and grid-connected inverter, the working range of mains supply is widened, the switching frequency of charging and discharging for a storage battery is reduced, the service life of the storage battery is prolonged, and a stable and uninterrupted power supply is provided for loads. The photovoltaic off-grid and grid-connected inverter is high in environmental suitability and is applied in regions where power grid is poor in quality and voltage is unstable.

Description

technical field [0001] The invention relates to the field of power electronic equipment, in particular to a novel photovoltaic off-grid inverter device. Background technique [0002] With the development of technology and the development of energy saving and emission reduction, photovoltaic power generation has received more and more attention and attention. Photovoltaic inverter devices can convert solar energy into electrical energy and are important devices in photovoltaic power generation systems. There are many kinds of photovoltaic inverter devices, among which off-grid photovoltaic inverter devices are widely used because they have both off-grid and grid-connected modes and are flexible to use. The off-grid photovoltaic inverter device is in grid-connected mode when there is mains power, and the power is supplied by the grid to the load, and solar energy can be transmitted to the grid; output energy to the load. However, the existing off-grid photovoltaic inverter d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J9/06
CPCH02J3/383H02J3/388H02J9/062Y02B10/70Y02E10/56
Inventor 黄敏潘世高
Owner FOSHAN BAYKEE NEW ENERGY TECH INC
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