Distributed new energy power generation system and distributed mixing maximum power tracking method

A distributed new energy and power generation system technology, applied in the direction of photovoltaic power generation, control/regulation system, and regulation of electrical variables, can solve the problems of large self-loss, decreased reliability, and large heat generation of MPPT systems, achieving low cost, The effect of cost reduction and low self-loss

Inactive Publication Date: 2014-03-12
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 modules in series. Each MPPT system processes the overall power of the photovoltaic modules connected to it, so each distributed MPPT system has a large self-loss and a large heat generation. , higher cost, lower reliability

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  • Distributed new energy power generation system and distributed mixing maximum power tracking method
  • Distributed new energy power generation system and distributed mixing maximum power tracking method

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Embodiment Construction

[0031] 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.

[0032] 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 side of the DC equipment is connected in series, thus forming a DC equipment string 106; in the DC equipment string 106, n new energy power generation equipment 101 1 -101 n The output ends connected in series form a high-voltage DC bus 105, and the output ends of n DC-DC converters 102 in the DC equipmen...

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Abstract

The invention discloses a distributed new energy power generation system and a distributed mixing maximum power tracking method. When the system operates, a DC-DC converter and a rear-end centralized converter respectively perform MPPT on the output power difference portion of a single new energy power generating device and the output power of a whole new energy power generation system, at the same time, the DC-DC converter can draw out energy from a rear-end DC bus to offset the difference of the output power of a front-end single new energy power generating device, and through the mutual coordination and cooperation of two MPPT functions, the whole new energy power generation system reaches maximum power output. According to the invention, the maximum power output of each new energy power generating device in the system can be realized, accurate monitoring of output power can be provided, and precision data is provided for system analysis so that the system can adjust control strategies to improve system generating efficiency, and rapid positioning of problematic assemblies is facilitated.

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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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G05F1/67
CPCY02E10/56
Inventor 吴红飞高峰孙健邢岩
Owner SHANGHAI CONVERTERGY ENERGY TECH
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