Ternary conversion system based on distributed power generation system
A distributed power generation and power grid system technology, applied to electrical components, output power conversion devices, AC power input conversion to DC power output, etc., can solve problems such as the inability to realize flexible control of multi-terminal DC systems
Inactive Publication Date: 2018-03-02
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0008] Aiming at the problem that the full DC grid-connected technology of the related technology cannot realize the flexible control of the multi-terminal DC system, no effective solution has been proposed so far. Therefore, the main purpose of the present invention is to provide a three-element commutation based on a distributed power generation system system to solve the above problems
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[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] In its most basic configuration, the figure 1 is a schematic structural diagram of a three-element converter system based on a distributed power generation system according to an embodiment of the present invention.
[0024] Such as figure 1 As shown, the ternary converter system based on the distributed power generation system may include: a distributed power generation system 10, a load system 30, a power grid system 50, and a converter device 70 connected to the distributed power generation system, the load system and the power grid system respectively and controller 90 .
[0025] Wherein, the converter device 70 may include: an inverter device 701 and a rectification and inverter ...
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The invention discloses a ternary conversion system based on a distributed power generation system. The ternary conversion system comprises a distributed power generation system, a load system, a power grid system, a conversion device which is respectively connected with the distributed power generation system, the load system and the power grid system and a controller, wherein the conversion device comprises an inversion device and a rectification and inversion device, and the inversion device is connected with the rectification and inversion device through a first set of direct current buses; the distributed power generation system is connected with the conversion device through a second set of direct current buses, and the first set of direct current buses are connected with the secondset of direct current buses in parallel; and the controller controls the connection state between the distributed power generation system, the load system as well as the power grid system and the conversion device, and the connection state comprises connection or disconnection. The ternary conversion system can realize flexible control for a multi-terminal direct current system.
Description
technical field [0001] The invention relates to the field of power electronics and household appliances, in particular to a three-element commutation system based on a distributed power generation system. Background technique [0002] With the upsurge of renewable energy development and utilization, renewable energy grid-connected technologies such as photovoltaic power generation have been rapidly developed and applied. At present, the scheme widely used in photovoltaic energy feedback grid system is: first convert solar energy into electrical energy, and then convert the electrical energy through a DC / DC converter to meet the requirements of DC / AC converter for pulse width modulation or space vector pulse width modulation. DC voltage, and finally the photovoltaic energy is fed back to the AC grid through the DC / AC converter. Load electricity is provided by the grid system after the photovoltaic energy is imported into the grid system. [0003] According to the difference...
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IPC IPC(8): H02J3/38H02M7/797
CPCH02J3/381H02M7/797
Inventor 赵志刚张雪芬蒋世用刘克勤
Owner GREE ELECTRIC APPLIANCES INC