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Parallel connection electric power regulating system with cyclic current wave filter

A technology for power conditioning, circulating current, applied in single-grid parallel feeding arrangements, AC networks to reduce harmonics/ripples, electrical components, etc.

Inactive Publication Date: 2009-05-13
TATUNG COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coupled inductors in Figure 6(A) can be stacked to increase the number of output pins, but all inverters must be connected to the same coupled inductor, which will also cause the problem of circulating current

Method used

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  • Parallel connection electric power regulating system with cyclic current wave filter
  • Parallel connection electric power regulating system with cyclic current wave filter
  • Parallel connection electric power regulating system with cyclic current wave filter

Examples

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Embodiment Construction

[0039] 7 is a schematic diagram of a parallel-parallel power conditioning system of a filter capable of filtering circulating currents of the present invention, which includes: a power supply 710 , an input terminal 720 , a plurality of power conditioning devices 730 and a load 740 .

[0040] The power source 710 can be a low-voltage fuel cell or other power sources (such as solar photovoltaic modules, etc.). The input terminal 720 is used for receiving an input terminal power. The input power source is preferably the output of the power source 710 . The plurality of power conditioning devices 730 are used to convert the output DC voltage Vin of the power supply 710 into an AC voltage vo. Each power conditioning device 730 includes a DC-DC converter 750 , a DC-AC converter 760 and a filter 770 . The load 740 is connected to the plurality of power conditioning devices 730 , and the plurality of power conditioning devices 730 are connected to the load 740 in parallel.

[0041...

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PUM

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Abstract

The invention provides a parallel connection power conditioning system which is provided with a filer for filtering cyclic currents, comprising an input terminal, a plurality of power conditioning devices and a load. The input terminal is used for receiving an input terminal power supply. Every power conditioning device comprises a DC-DC converter, a DC-AC transducer and the filter for filtering the cyclic currents. The DC-DC converter is used for receiving and transforming the input terminal power supply to form a steady DC voltage. The DC-AC transducer converts the steady DC voltage to an AC voltage. The filter is coupled to the DC-AC transducer for filtering noise in the AC voltage and the cyclic currents between the power conditioning devices and generating a filtration voltage. The load is connected to a plurality of power conditioning devices, wherein, a plurality of power conditioning devices are connected to the load in parallel.

Description

technical field [0001] The invention relates to the technical field of electric power regulation, in particular to a parallel-parallel power regulating system, which has a filter capable of filtering out circulating current. Background technique [0002] As for the technology of power supply (Power Supply) and uninterruptible power system (uninterruptible power system, UPS), the industry has proposed many technologies of parallel-parallel inverters. The known method is that the output of the frequency converter is filtered by a combination of inductance and capacitance (LC), figure 1 is a block diagram of a known parallel-parallel power conditioning system. Such as figure 1 As shown, the output voltage and current of the power supply 110 are output to a load 150 through a plurality of power conditioning devices (Power Condition System, PCS) 120 . The power conditioner 120 of this low voltage source includes a DC-DC converter 130 and a DC-AC converter 140 . However, each ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/537H02M1/12H02J3/01H02J3/38
CPCY02E40/40
Inventor 赖日生林明宪陈虹妏刘育轩林峰源陈建良
Owner TATUNG COMPANY
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