Adjusting device and method for optimizing matched load changes based on multi-inverter combination
A technology of matching loads and combination optimization, which is applied to circuit devices, AC network circuits, electrical components, etc., can solve problems such as large no-load loss, reduced controllability, and inverters that cannot work all the time, so as to ensure reliability, Effect of reducing no-load loss
Pending Publication Date: 2018-01-19
SHANGHAI GHREPOWER GREEN ENERGY
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Problems solved by technology
It mainly has the following defects: 1. The capacity of the single inverter is large, and the no-load loss is also large; 2. Due to the change of the load power, the inverter cannot always work in the high efficiency area
However, several sets of transformers are added to the system. Since the transformers also have energy loss, the controllability of this method to improve efficiency is reduced.
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[0023] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.
[0024] The adjusting device provided by the present invention is based on the combination of multiple sets of inverters to optimize and match load changes, including a load group, an inverter, a load management system, and the like.
[0025] Among them, the load group is composed of multiple loads with the same or similar voltage level, working period, and important level, which is convenient for the unified management of the loads. like figure 1 As shown, in this embodiment, two load groups are taken as an example for description, that is, load group 1 and load group 2 .
[0026] The number of inverters is equivalent to the number of load groups, and the capacity of the inverters is determined according to the total power of the load groups to ensure that the inverters can work in the high-efficiency area (load rate 40% to 80%)....
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The invention relates to an adjusting device for optimizing matched load changes based on multi-inverter combination, and is characterized by comprising N load groups, N inverters and a load management system. The invention further provides an adjusting method for optimizing matched load changes based on multi-inverter combination. The method has the advantages that inverters of different specifications are selected according to different load groups, so that the inverters can work in an efficient area; and the switching time period of the corresponding inverter is set according to the workingtime period of the load group, so that the zero-load loss of the whole inverter system is reduced; when an inverter of the important load breaks down, the load management system automatically switches the important load to other inverters, so that the reliability of the important load is guaranteed.
Description
technical field [0001] The invention relates to a device for controlling an inverter to supply power to an AC load whose load power has peak-to-valley changes and a control method based on the device. Background technique [0002] With the vigorous promotion of the new energy industry and smart microgrid applications, the application of inverters has attracted more and more attention, and efficiency and no-load loss are important design indicators for inverters. [0003] In the off-grid power supply system, the common power supply method adopts the centralized off-grid inverter load mode, that is, as figure 1 As shown, a single inverter is used to power all loads. It mainly has the following defects: 1. The capacity of the single inverter is large, and the no-load loss is also large; 2. Due to the change of the load power, the inverter cannot always work in the high efficiency area. [0004] With the continuous improvement of technology, the current method of using multi-i...
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Inventor 邱德杰叶余胜俞卫魏爱萍
Owner SHANGHAI GHREPOWER GREEN ENERGY