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

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

[0030] In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the present invention will be further explained below in conjunction with specific drawings.

[0031] 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, among them, new energy power generation equipment 101 1 -101 n The output terminal of is connected in parallel with the input terminal of the DC-DC converter 102, and n new energy power generation equipment 101 1 -101 n The output side of is connected in series to form a DC device string 106; in the DC device string 106, n new energy power generation devices 101 1 -101 n The output terminals connected in series form a high-voltage DC bus 105. The output terminals of the n DC-DC converters 102 in the DC equipment string 106 are dir...

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Abstract

The invention discloses a 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 directly merge the power difference portion of the single new energy power generating device into a rear-end DC bus, 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 field of new energy technology, and relates to a solar photovoltaic cell grid-connected / off-grid system maximum power point tracking technology, in particular to a new energy power generation system, and 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 and thermal power 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 is greatly increased and the promotion and application of new energy power generation technologies are restricted. The following takes a solar photovoltaic power generation system as an example to illustrate the application background of the present invention. [0003] Grid-connected photovoltaic power gen...

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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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