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Power inverter with functions of UPS (uninterrupted power supply) and active power filter

A technology of power filters and power converters, which is applied in the direction of current collectors, electric vehicles, electrical components, etc., can solve problems such as out-of-control equipment, economic losses, and data loss, and achieve fast dynamic compensation, high hardware utilization, and reduced The effect of equipment cost

Inactive Publication Date: 2012-04-11
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, factors such as lightning in nature and poor grounding of the power grid all affect the power supply quality of the power grid
Due to the influence of the above factors, computer equipment connected to the power grid, including communication, medical, financial, weapon control and other sophisticated instruments and equipment, may have serious consequences such as loss of control, data loss, shutdown, damage, etc., directly affecting the normal work of users , causing severe economic losses

Method used

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  • Power inverter with functions of UPS (uninterrupted power supply) and active power filter
  • Power inverter with functions of UPS (uninterrupted power supply) and active power filter
  • Power inverter with functions of UPS (uninterrupted power supply) and active power filter

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] Such as figure 1 As shown, a power converter with both UPS and active power filter functions is composed of an active power filter, a digital control circuit and a storage battery 9, and the storage battery 9 and the digital control circuit are respectively electrically connected to the active power filter ;

[0020] The storage battery 9 is connected in parallel to the main circuit DC side of the active power filter;

[0021] The storage battery 9 is connected in parallel with both ends of the capacitor 8 and connected with the DC side voltage sensor 6 in parallel.

[0022] Described active power filter comprises voltage sensor 2, three-phase power supply 1, load current sensor 3, APF side current sensor 4, APF side voltage sensor 5, power converter 7, capacitor 8 and load 10; The input of voltage sensor 2 connected in parallel to the output terminal of the t...

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Abstract

The invention relates to a power inverter with functions of a UPS (uninterrupted power supply) and an active power filter, belonging to the technical fields of power inverters. The power inverter comprises an active power filter a digital control circuit and further comprises a storage battery, wherein the storage battery and the digital control circuit are respectively electrically connected with the active power filter. The power inverter has the beneficial effects that the storage battery is parallel connected to the direct-current side of the main circuit of the active power filter, and when harmonic current and reactive compensation are finished, energy is stored for the storage battery, thus when malfunctions of power supply through the power grid voltage occurs, power can be supplied for the load by the storage battery through the inverter; through the control of the inverter, the additional UPS device is saved for the system, thus the device cost is lowered; and when power is supplied normally for the power supply, after certain voltage stabilization and filtering is carried out on the power supply by the UPS, power is sent to the load, thus an alternating-current power supply with better quality can be obtained for the load.

Description

technical field [0001] The invention relates to a power converter, in particular to a power converter with both UPS and active power filter functions, and belongs to the technical field of power converters. Background technique [0002] In recent years, the widespread use of power electronic devices and nonlinear loads has caused a large amount of harmonic current and reactive current to be injected into the grid, which seriously threatens the safe operation and normal use of the grid and electrical equipment. Filtering and compensation of harmonic reactive power has been People pay more and more attention to it. Active power filter is one of the best options to improve power quality, so it is developing very rapidly. The shunt active filter injects compensation current into the power grid to offset the harmonics generated by the harmonic source, making the power supply current a sine wave, which itself exhibits the characteristics of a current source. With the increasingl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/34
Inventor 张晓谭国俊王峰李晓迅李成君张课张传金孔令军张迎孙华
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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