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Active isolation type single-phase high-quality power supply system

A power supply system, isolated technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of low utilization efficiency of energy storage batteries, increased power consumption and production costs, and increased capacity of energy storage batteries, etc. Efficiency of energy transmission, saving electricity cost, and the effect of fewer components

Pending Publication Date: 2021-03-16
格瑞美科技(武汉)有限公司
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Problems solved by technology

The UPS can basically filter out all the interference and harmonics in the power grid, and there is no conversion time for switching. At present, the technology development is relatively mature, and it is applied to most users. However, the rectifier and inverter of the UPS not only need Transmission of all load power results in high operating loss and low transmission efficiency of the system, and the control strategies of both need to match the operating state of the energy storage battery, so the control is more complicated. low efficiency
[0006] In summary, the traditional single-phase power supply system has certain contradictions in system control performance, transmission efficiency or module utilization efficiency, and with the increasing load capacity of important users, especially the power consumption and production of double-conversion UPS The significant increase in cost, coupled with the increase in the capacity of energy storage batteries with a single function makes the utilization efficiency of energy storage batteries even lower, making this type of contradiction more prominent

Method used

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  • Active isolation type single-phase high-quality power supply system
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  • Active isolation type single-phase high-quality power supply system

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0042] figure 1 Shown is a schematic diagram of a typical existing double-conversion UPS system. When the system is in the grid-connected mode of the power supply system, the electric energy of the AC grid is filtered by the filter inductor 15 and then converted into DC by the rectifier 16. According to the system control command, Part of the electric energy is charged to the energy storage bat...

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Abstract

The invention belongs to the technical field of power transmission and distribution of power systems, and provides an active isolation type single-phase high-quality power supply system which is usedfor providing high-quality power supply and guaranteed power supply for important users and realizing peak-load shifting through cooperation with a power grid. The system comprises an input switch, anoutput switch, a bypass switch, an isolation reactor, a filter, a single-phase inverter, an energy storage battery and the like. Through improvement of a topological structure, the isolation reactorin the power supply system can achieve a good isolation effect under power grid disturbance or faults during normal operation of the power grid, and meanwhile, a power grid side power factor can be basically a unit power factor in cooperation with single-phase inverter control; and the single-phase inverter does not need to transmit load active power when the power grid operates normally and a peak-load shifting instruction of the system is not received, so the operation loss of the system is greatly reduced, the energy transmission efficiency of the system is improved, and the above advantages are more prominent in the case of a high-capacity load.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution of power systems, and more specifically relates to an active isolated single-phase high-quality power supply system, which is used to provide high-quality power supply and guaranteed power supply for important users, and cooperate with power grids to cut peaks and fill valleys. Background technique [0002] Today, important users not only require production indicators such as high power supply quality, power supply reliability, and operating efficiency, but also with the increasing load capacity, while ensuring high-quality power supply, improving the transmission efficiency of the power supply system and the utilization efficiency of modules have a significant impact on production. It is of great significance to study the power supply system with stable control performance and high operating efficiency. As a high-quality power supply system, Uninterrupted Power Supply ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J3/00H02J3/32
CPCH02J9/062H02J3/0073H02J3/32
Inventor 左文平张港华周猛文劲宇
Owner 格瑞美科技(武汉)有限公司
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