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Photovoltaic cell multiple-peak maximum power tracing method and system based on particle swarm

A maximum power tracking, photovoltaic cell technology, applied in photovoltaic power generation, control/regulation systems, adjustment of electrical variables, etc., can solve problems such as slow tracking speed, increased power loss, power oscillation, etc.

Inactive Publication Date: 2019-05-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that most of the existing technologies are single-peak maximum power tracking methods, while the traditional methods are slow in tracking speed, and are prone to power oscillations in steady state, increasing power loss, and prone to misjudgment and falling into local Optimum Technical Deficiencies, Provides a Particle Swarm Based Multi-Peak Maximum Power Tracking Method for Photovoltaic Cells

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  • Photovoltaic cell multiple-peak maximum power tracing method and system based on particle swarm
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  • Photovoltaic cell multiple-peak maximum power tracing method and system based on particle swarm

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Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0045] refer to figure 1 , which is figure 1 It is a schematic block diagram of the circuit structure of the photovoltaic maximum power tracking in the embodiment of the present invention, and the working structure of the circuit includes:

[0046] Photovoltaic cell array module, DC / DC converter module, load or inverter module, wherein the control unit includes data acquisition unit, particle swarm algorithm and controller unit;

[0047] The data acquisition unit collects the photovoltaic cell array to obtain the output current and output voltage values ​​required by the particle swarm algorithm, and uses the particle swarm algorithm to calculate and determine the maximum power;

[0048] The controller unit outputs th...

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Abstract

The invention discloses a photovoltaic cell multiple-peak maximum power tracing method and system based on a particle swarm. The data values of voltage and current output by a photovoltaic cell underthe partial shaded condition are obtained, particles are initialized to a possible voltage value, the maximum power point of the particles is iteratively continually updated, a historical optimal position and a global optimal position of an individual are looked for, therefore, the multi-peak maximum power point obtained under the complicated partial shaded condition is determined, and after a corresponding ending condition is reached, searching of the maximum power point is ended. Compared with a traditional maximum power tracing method, the maximum power tracing method can prevent searchingfrom trapping in local optimum, the tracing precision and speed are ensured, oscillation loss generated in the tracing process is reduced, and the method more conforms to reality.

Description

technical field [0001] The invention relates to a particle swarm-based multi-peak maximum power tracking method and system for photovoltaic cells, belonging to the field of photovoltaic power generation engineering. Background technique [0002] With the gradual consumption of mineral energy and the gradual aggravation of environmental pollution, more and more renewable energy sources are favored by people. As an environmentally friendly and renewable energy source, solar photovoltaic power generation technology has been widely used, and photovoltaic (PV) devices are increasingly put into various applications. However, the problem of photoelectric conversion efficiency has always been a technical bottleneck hindering the development of photovoltaic power generation. In order to maximize the development and utilization of solar energy resources, tracking the maximum power point of the photovoltaic power generation system is a very effective way to improve the photoelectric c...

Claims

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Application Information

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IPC IPC(8): G05F1/67
CPCY02E10/56
Inventor 谭智力杨胜胜
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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