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Method for tracking maximum power of photovoltaic cell

A maximum power tracking, photovoltaic cell technology, applied in photovoltaic power generation, optical radiation generators, adjusting electrical variables, etc., can solve the problems of poor adaptability, slow response speed, low tracking efficiency, etc., to improve speed and stability accuracy, reduce Effects of System Oscillation

Active Publication Date: 2013-06-05
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are some problems in the maximum power tracking method of photovoltaic cells, such as low detection accuracy, slow response speed, poor adaptability and low tracking efficiency, etc.

Method used

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  • Method for tracking maximum power of photovoltaic cell
  • Method for tracking maximum power of photovoltaic cell
  • Method for tracking maximum power of photovoltaic cell

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Experimental program
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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, technical content of the present invention is described:

[0024] Such as figure 1 Shown, the maximum power tracking method of a kind of photovoltaic cell of the present invention is specifically implemented as follows:

[0025] Step 1: Collect the voltage and current of the photovoltaic panel through the voltage sensor and the Hall sensor, send the collected voltage and current to the digital signal processor (DSP) through the current conditioning circuit, and pass P=U* in the DSP I calculates the power and calculates the derivative of the power with respect to the voltage at the current moment. The derivative of power to voltage can be approximated by dividing the power deviation at two moments before and after by the voltage deviation at two moments before and after.

[0026] Step 2: Judging whether the absolute value of the derivative of power to voltage at the current moment is less than the set precision ε. The se...

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Abstract

The invention discloses a method for tracking the maximum power of a photovoltaic cell. By the method, an excursion direction of an error is judged according to a power differential coefficient to a voltage; when the differential coefficient is on the left side of a maximum power point, a regulation value is increased; and when the differential coefficient is on the right side of the maximum power point, the regulation value is decreased. When the power differential coefficient to the voltage is smaller than a certain given parameter, a step length is converted so as to track the power further. Simulation shows that compared with the conventional algorithm for tracking the maximum power point, the method has the advantages that the precision, the speed and the stability of tracking the maximum power point are improved.

Description

technical field [0001] The invention relates to a maximum power tracking method of a photovoltaic cell. The invention belongs to the technical field of photovoltaic cell power tracking. Background technique [0002] Photovoltaic power generation is a recognized high-tech and promising new energy technology. This is because solar energy is inexhaustible and inexhaustible, does not produce any waste, has no pollution such as noise, and does not have adverse effects on the environment. It is an ideal clean energy source. my country's "Renewable Energy Medium and Long-Term Development Plan" clearly states that by 2010, the total capacity of photovoltaic power generation will reach 300MW, and by 2020 it will reach 1800MW. In order to implement the strategic deployment of the Party Central Committee and the State Council on accelerating the cultivation and development of strategic emerging industries, it is necessary to raise awareness, firmly grasp the strategic opportunity per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67H02N6/00
CPCY02E10/58Y02E10/56
Inventor 刘皓明袁晓玲李世军张叶王闯周雪婵陈宇斌
Owner HOHAI UNIV