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Power control method and device based on parallel double inverters

A power control and dual-inverter technology, applied in the field of power control methods and devices based on parallel-connected dual-inverters, can solve problems such as unbalanced power consumption of parallel-connected dual-inverters, and achieve improved overall performance and balanced power wear and reduce the effect of the difference in service life

Active Publication Date: 2022-03-15
INNER MONGOLIA POWER GRP
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Problems solved by technology

[0005] The purpose of the present invention is to provide a power control method and device based on parallel double inverters to improve the problem of unbalanced power consumption of parallel double inverters in the grid connection period in the prior art

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  • Power control method and device based on parallel double inverters
  • Power control method and device based on parallel double inverters

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Embodiment Construction

[0023] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

[0024] Before explaining the specific embodiments of the present invention, the inventors of the present invention found that: in the previous research and devel...

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Abstract

The present invention provides a power control method and device based on parallel dual inverters. The method includes: performing the following steps in the current grid-connected period to obtain the corrected reference active and reactive power of the first inverter; calculating The difference between the total actual output active power of the first inverter and the second inverter in the last grid-connected full period; the corrected reference active power of the second inverter is calculated based on the difference in active power; Calculate the difference between the total actual output reactive power of the first inverter and the second inverter in the last full period of grid connection; calculate the reference for the correction of the second inverter based on the difference in reactive power Reactive power; power control is performed on the first and second inverters according to the revised reference active and reactive power. The invention can improve the problem of unbalanced power consumption of the first inverter and the second inverter in the grid-connected state.

Description

technical field [0001] The invention relates to the field of power control of inverters, in particular to a power control method and device based on parallel double inverters. Background technique [0002] In recent years, with the rapid development of distributed generation (DG) technologies for renewable energy sources such as solar energy, wind energy, and fuel cells, grid-connected inverters, as the key equipment for connecting distributed power sources to the public power grid, have good or bad control performance. It directly affects the massive access and reliable operation of distributed energy. [0003] The prior art "improved power control and parallel-off-grid dual-mode control method based on parallel dual inverters" proposes a general structure for connecting distributed power sources to the grid, and proposes a corresponding coordinated control strategy. The distributed power generation unit is connected to a common connection point (Point of Common Coupling, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02M7/42
CPCH02M7/42
Inventor 韩俊飞何晋伟王宇强
Owner INNER MONGOLIA POWER GRP
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