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Direct current power source device for photovoltaic inverter

A photovoltaic inverter, DC power supply technology, applied in photovoltaic power generation, circuit devices, irreversible AC power input conversion to DC power output and other directions, can solve problems such as complicated structure, achieve simple structure, reduce input current harmonics , the effect of reducing grid voltage distortion

Inactive Publication Date: 2015-02-04
WEIHAI GUANGTAI AIRPORT EQUIP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The DC power supply can output a relatively stable DC analog signal, and it is less likely to cause damage to the back-end device under test. Its substantial disadvantage is that the structure is cumbersome

Method used

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  • Direct current power source device for photovoltaic inverter
  • Direct current power source device for photovoltaic inverter

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Embodiment Construction

[0016] The present invention is further described below in conjunction with accompanying drawing:

[0017] as attached figure 2 As shown, a DC power supply device for a photovoltaic inverter is provided with an input reactor, a soft start circuit and a 12-pulse rectification circuit, the input reactor is set at the front end of the soft start circuit, and the back end of the soft start circuit is connected to The 12-pulse rectifier circuit can reduce the input current harmonics through the input reactor, so that the grid voltage meets the test conditions of the photovoltaic inverter. To reduce the input current harmonic effect, resistors R1, R2, R3 and two contactors K1, K2 form a soft start circuit, one contactor K1 is connected in series with three resistors R1, R2, R3 respectively, and then connected in parallel with another contactor K2 , The 12-pulse rectifier circuit consists of a transformer T1, two three-phase uncontrolled rectifier bridges B1, B2, a balance reactor ...

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Abstract

The invention relates to the technical field of photovoltaic new energy, in particular to a direct current power source device for a photovoltaic inverter. The direct current power source device for the photovoltaic inverter is characterized by comprising an input electric reactor, a soft start circuit and 12-pulse-wave rectifying circuit; the input electric reactor is arranged at the front end of the soft start circuit; the rear end of the soft start circuit is connected with the 12-pulse-wave rectifying circuit; the function of reducing the input current harmonic is achieved through the input electric reactor to enable the power grid voltage to satisfy a testing condition of the photovoltaic inverter. The direct current power source device for the photovoltaic inverter has the advantages of being simple in structure, reducing the current harmonic inputting into the direct current power source, reducing the power grid voltage distortion, being matched with the photovoltaic inverter in utilization after grid connection, reducing electricity, being energy saving and environmental friendly, enabling the power grid voltage to satisfy a photovoltaic inverter testing condition and the like.

Description

technical field [0001] The invention relates to the technical field of new photovoltaic energy sources, in particular to a DC power supply device for a photovoltaic inverter. Background technique [0002] Solar photovoltaic power generation is growing rapidly due to its small size, long life and zero emissions. At this stage, photovoltaic power generation mainly includes 400V low-voltage user-side grid-connected systems, medium-sized photovoltaic power stations connected to 10kV and 35kV through step-up transformers, and large-scale photovoltaic power stations connected to 66kV. On July 21, 2009, the Ministry of Finance, the Ministry of Science and Technology, and the National Energy Administration jointly issued the "Notice on the Implementation of the Golden Sun Demonstration Project", and decided to comprehensively adopt financial subsidies, scientific and technological support and market pull methods to accelerate the industrialization of domestic photovoltaic power gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/12H02M1/36H02M7/17H02M1/32H02M3/38
CPCH02J3/383H02M1/12H02M1/32H02M1/36H02M7/17Y02E10/56
Inventor 陈江岸马传翔雷小明彭海强常国洁张云亮
Owner WEIHAI GUANGTAI AIRPORT EQUIP CO LTD
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