A kind of mppt circuit with counting, digital storage and comparison functions multiplexed

A digital storage and function multiplexing technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of high chip complexity, achieve the effect of low circuit complexity, reduced circuit complexity, and high tracking accuracy

Active Publication Date: 2018-04-03
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can overcome the problem of offset in the analog comparator, but in the current method, it is necessary to use a counter, a digital memory and a digital comparator, which leads to a high complexity of the chip, and there are a large number of complex digital parts

Method used

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  • A kind of mppt circuit with counting, digital storage and comparison functions multiplexed
  • A kind of mppt circuit with counting, digital storage and comparison functions multiplexed
  • A kind of mppt circuit with counting, digital storage and comparison functions multiplexed

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Embodiment Construction

[0029] The following is a detailed description of the MPPT (Maximum Power Point Tracking) circuit that realizes multiplexing of counting, digital storage and comparison functions.

[0030] figure 1 It is an algorithm flow diagram of the MPPT circuit multiplexed with counting, digital storage and comparison functions. At the beginning of the cycle, the counter is reset, the counter is cleared, and then the output power of the battery panel in the form of current charges the discharged capacitor, and the counter starts counting up at the same time. When the capacitor voltage reaches the set threshold voltage, the counter stops counting. Then the value in the counter at this time represents the size of the output power value of the solar panel. Then disturb the output voltage of the battery board, and then count the counter in the previous step in the same way. In the whole process of counting, as long as the counter is judged to have exceeded the full "1" point, the output powe...

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PUM

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Abstract

The invention discloses an MPPT (maximum power point tracking) circuit with multiple functions of counting, digital storage and comparison. The circuit comprises a simulation conversion unit, a counter unit and a logic judgment unit, wherein the simulation conversion unit is used for converting an input solar cell panel power value simulating the current form into a time value; the counter unit is used for counting the time value converted by the simulation conversion unit, and the magnitude of the counting value reflects the length of time and thus reflects the magnitude of a simulation current input signal; the logic judgment unit judges the magnitude of cell panel power values of two adjacent periods and determines the disturbance direction of cell panel output voltage of the next period. The MPPT circuit can solve the problem of comparator imbalance when simulation comparators are used for comparing power values and the problem of circuit complexity caused by use of complex storages and digital comparison modules in common counting methods and has high application value.

Description

technical field [0001] The invention relates to the field of maximum power point tracking (MPPT) of a solar cell panel, in particular to an MPPT algorithm realization circuit with simple structure, low complexity and high precision tracking. Background technique [0002] In recent years, with the decreasing stock of traditional energy and the global climate and environmental issues, green energy has become the focus of attention of various countries around the world. As a renewable and clean energy with relatively mature technology, solar power generation has received more and more attention in countries all over the world, followed by the maximum power tracking (MPPT) device to improve the power output efficiency of the battery panel, which has also become a research hotspots. [0003] In MPPT technology, DSP or MCU is often used as the control core of MPPT controller, but the complex circuit and expensive price are not suitable for large-scale and distributed lightweight ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67
CPCG05F1/67
Inventor 江如成韩雁张世峰
Owner ZHEJIANG UNIV
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