Grid-connected inverter of distributed photovoltaic power generation system
A distributed photovoltaic and power generation system technology, applied in photovoltaic power generation, circuit devices, electrical components, etc., can solve the problems of damage to power equipment, endangering the personal safety of workers, endangering the personal safety of low-voltage power distribution system maintenance workers, etc. Solve the problem of loose flow, ensure safety, enhance the effect of anti-interference ability and accuracy
Inactive Publication Date: 2016-10-26
竑光新能源科技有限公司
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Problems solved by technology
The difference in the construction of the low-voltage power distribution system and the photovoltaic power generation system has brought great challenges to the safe operation of the two systems. Some accidents have occurred in the actual operation process, causing damage to power equipment, and some accidents have endangered the personal life of the staff. Safety, the asynchronous grid connection between the two systems, after the low-voltage power distribution system is powered off, the photovoltaic power generation system reversely sends power to the low-voltage power distribution system, endangering the personal safety of the maintenance staff of the low-voltage power distribution system
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[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0013] see figure 1 , the present invention provides a technical solution: a grid-connected inverter device for a distributed photovoltaic power generation system, including a photovoltaic array 1 and a storage battery 2, the electrical output of the photovoltaic array 1 is connected to a charging unit 3, and the charging unit 3 is respectively The electrical output is connected to the A / D conversion module 4 and the bidirectional inverter 6, and the electrica...
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The invention discloses a grid-connected inverter of a distributed photovoltaic power generation system. The grid-connected inverter comprises a photovoltaic array and a storage battery, wherein electrical output of the photovoltaic array is connected to a charging unit; the electrical output of the charging unit is connected to an A / D conversion module and a bidirectional inverter separately; the electrical output of the A / D conversion module is connected to an energy storage unit; the electrical output of the bidirectional inverter is connected to an anti-reflux control unit and a bidirectional metering unit separately; the electrical output of the anti-reflux control unit and the bidirectional metering unit is connected to a power grid port; and the electrical output of the bidirectional metering unit is connected to a metering comparison unit. According to the grid-connected inverter of the distributed photovoltaic power generation system, the anti-jamming capability and accuracy of an inverter unit are strengthened through the bidirectional inverter arranged in a grid-connected circuit; the feeding phenomenon of the inverter to the power grid port is effectively prevented; the problem of stray current in the photovoltaic power generation system is effectively solved; and the safety is better ensured.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a grid-connected inverter device for a distributed photovoltaic power generation system. Background technique [0002] With the country's promotion of renewable energy applications, photovoltaic power generation systems have become an indispensable and important supplement to my country's energy supply. An important development direction. At present, a large number of small hybrid photovoltaic power generation systems are connected to the low-voltage power distribution system. The construction of the low-voltage power distribution system and the construction of the photovoltaic power generation system are not synchronized. to access. The difference in the construction of the low-voltage power distribution system and the photovoltaic power generation system has brought great challenges to the safe operation of the two systems. Some accidents have occurred in t...
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Login to View More IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 彭景生
Owner 竑光新能源科技有限公司