An Uninterruptible Power Supply with Reactive Power Compensation and Active Filtering Functions

A technology of source filter and power supply, which is applied in active power filtering, reactive power adjustment/elimination/compensation, emergency power supply arrangement, etc., and can solve problems that affect the service life of UPS equipment, energy waste, and reduce energy utilization. Achieve the effects of improving power quality, improving conversion efficiency, and improving utilization

Active Publication Date: 2018-11-27
青岛创统科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing UPS uninterruptible power supply can rectify and invert the appropriate AC mains to obtain a stable AC output, the conversion efficiency does not exceed 95%, which reduces the utilization rate of energy and causes Unnecessary energy waste, and a lot of heat will be generated during the conversion process, which affects the service life of UPS equipment

Method used

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  • An Uninterruptible Power Supply with Reactive Power Compensation and Active Filtering Functions
  • An Uninterruptible Power Supply with Reactive Power Compensation and Active Filtering Functions
  • An Uninterruptible Power Supply with Reactive Power Compensation and Active Filtering Functions

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Embodiment Construction

[0038] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] In order to improve conversion efficiency and improve power supply quality, the uninterruptible power supply of this embodiment proposes a new circuit topology, such as figure 2 As shown, it includes mains input terminal VIN, load output terminal VOUT, active filter APF, reactive power compensator SVG, converter, centralized controller, double switching device KD and battery BAT and other main components. Wherein, the mains input terminal VIN is used for connecting to an external power grid and connecting to an AC mains. Inside the uninterruptible power supply, the mains input terminal VIN can be connected to the double switching device KD through the main power transmission line, and then connected to the load output terminal VOUT through the double switching device KD. The AC mains connected to the power input terminal VIN is transm...

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Abstract

The invention discloses an uninterruptible power supply with the functions of reactive power compensation and active filtering. The power supply comprises a city power input end, a load output end, an active filter, a reactive power compensator, a converter, a storage battery, a double-switch device and a centralized controller. The centralized controller controls the converter to work in a rectified state when city power is normal, switches on the active filter and the reactive power compensator to carry out harmonic suppression and reactive compensation on city power, powers an external load, and stores energy for the storage battery. The centralized controller controls the converter to work in an inversion state when city power is abnormal, inverse direct current output by the storage battery into alternating current to provide uninterruptible power supply for the external load. The power need of the load is met. The power supply quality is improved. The conversion efficiency of the uninterruptible power supply is greatly improved. The energy use ratio is improved. The heat of a system circuit is reduced. The service life of the uninterruptible power supply is prolonged.

Description

technical field [0001] The invention belongs to the technical field of uninterruptible power supply equipment, and in particular relates to an uninterruptible power supply with dual functions of reactive power compensation and active filtering. Background technique [0002] With the increasing requirements for the quality, safety and reliability of electric energy in today's society and the increasing demand for electricity, using UPS to improve the stability of system operation has gradually become a development trend. UPS is uninterruptible power supply, the structure is as follows figure 1 As shown, it usually includes rectifier, inverter and battery. Among them, the rectifier is directly connected to the power grid. When the mains power is normal, the rectifier rectifies the AC mains power into direct current, transmits it to the battery, and uses the battery to store electric energy. When the mains power is interrupted or fails, the UPS immediately converts the DC pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/01H02J9/06
CPCH02J3/01H02J3/1821H02J9/061H02J9/068Y02E40/20
Inventor 郜克存隋学礼
Owner 青岛创统科技发展有限公司
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