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New energy power generation system and distributed mixing maximum power tracking method

A power generation system and new energy technology, applied in photovoltaic power generation, control/regulation systems, electrical components, etc., can solve the problems of large self-loss, reduced reliability, and large heat generation of MPPT systems, and achieve low cost, cost reduction, and The effect of low self-loss

Inactive Publication Date: 2014-10-22
SHANGHAI CONVERTERGY ENERGY TECH
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Problems solved by technology

[0004] At present, distributed MPPT systems are generally connected to the back end of photovoltaic new energy power generation equipment in series. Each MPPT system processes the overall power of the photovoltaic new energy power generation equipment connected to it, so the self-loss of each distributed MPPT system is relatively small. Large, high heat generation, high cost, and reduced reliability

Method used

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  • New energy power generation system and distributed mixing maximum power tracking method
  • New energy power generation system and distributed mixing maximum power tracking method

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Embodiment Construction

[0032] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0033] see figure 1 , the new energy power generation system 100 provided by the present invention consists of n new energy power generation equipment 101 1 -101 n , n DC-DC converters 102 and a centralized converter 103, wherein the new energy power generation equipment 101 1 -101 n The output terminal of is connected in parallel with the input terminal of DC-DC converter 102, and n new energy generating equipment 101 1 -101 n The output sides of the DC devices are connected in series in sequence, thus forming a DC equipment string 106 .

[0034] n new energy power generation equipment 101 in the DC equipment string 106 1 -101 n The output terminals connected in series form a high-voltage DC bus 105, and n new energy power generation equ...

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Abstract

A distributed new energy power generation system and a distrusted mixed maximum power tracking method. Output ends of a plurality of serially connected new energy power generation devices (1011, 1012, …, 101n) form a high-voltage direct-current bus bar. A DC-DC converter (102) and a backend integrated converter (103) separately perform MPPT on an output power of each new energy power generation device (1011, 1012, …, 101n) and an output power of a whole new energy power generation system. A difference current of the new energy power generation device (1011, 1012, …, 101n) is delivered to the DC-DC converter (102), and the output voltage is adjusted by using the DC-DC converter (102), so that this part of energy is merged into the direct-current bus bar and jointed delivered to the integrated converter (103), and by means of the collaboration of two MPPT functions, the whole new energy power generation system outputs a maximum power.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a maximum power point tracking technology of a solar photovoltaic cell grid-connected / off-grid system, in particular to a new energy power generation system, a corresponding distributed hybrid maximum power tracking system and a corresponding tracking method. Background technique [0002] The development and utilization of new energy generation technologies such as solar energy and thermoelectricity are important measures to deal with energy and environmental crises. Due to the high cost of new energy power generation equipment and low energy conversion efficiency, the cost of power generation has been greatly increased, which limits the promotion and application of new energy power generation technology. The application background of the present invention will be described below by taking a solar photovoltaic power generation system as an example. [0003] Photovoltaic grid-co...

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Application Information

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IPC IPC(8): H02J3/38G05F1/67
CPCG05F1/67H02J2300/26H02J3/381Y02E10/56
Inventor 孟令孔郑伟
Owner SHANGHAI CONVERTERGY ENERGY TECH
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