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Maximum power tracking system and method based on self-adaptive voltage

A technology of maximum power tracking and self-adaptive voltage, which is applied in control/regulation systems, photovoltaic power generation, and electric variable adjustment. The effect of weight, improving output power and control system stability

Active Publication Date: 2019-09-24
SHANGHAI INST OF SPACE POWER SOURCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both the perturbation and observation method and the incremental conductance method need to sample the output voltage and current of the solar array, which is difficult to implement with hardware circuits and has low reliability
The fixed voltage method does not need to sample the current of the solar array, but it needs to sample the open-circuit voltage of the solar battery at regular intervals. At this time, the solar battery cannot output power to the load, and the battery needs to provide power, which artificially increases the charging and discharging times of the battery, causing waste and reducing the use of the battery. life

Method used

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  • Maximum power tracking system and method based on self-adaptive voltage
  • Maximum power tracking system and method based on self-adaptive voltage
  • Maximum power tracking system and method based on self-adaptive voltage

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Embodiment Construction

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] figure 1 It is a structural block diagram of an adaptive voltage-based maximum power tracking system provided by an embodiment of the present inventio...

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Abstract

The invention discloses a maximum power tracking system and method based on a self-adaptive voltage. The system comprises a sampling circuit, a proportion adjusting circuit, a holding circuit, a comparison circuit, an integrating circuit, a PI adjusting circuit and a driving circuit. The sampling circuit obtains a solar array real-time voltage signal; the proportion adjusting circuit obtains a voltage-dividing signal of the solar array real-time voltage; the holding circuit obtains a self-adaptive solar array output voltage; the comparison circuit is used for comparing the solar array real-time voltage signal with the self-adaptive output voltage to obtain a solar array voltage control signal; and the integrating circuit is used for integrating the control signal obtained by the comparison circuit to obtain the reference of the control system. The maximum power tracking method provided by the invention is simple in structure and stable in control system, and provides a mode of effectively improving the output power of the solar cell, reducing the area of the solar array and reducing the weight of the power supply for a satellite powered by the solar array.

Description

technical field [0001] The invention belongs to the technical field of solar array maximum power tracking adjustment control, and in particular relates to a maximum power tracking system and method based on adaptive voltage. Background technique [0002] In the satellite power system, there are two main methods of power regulation: direct energy transfer (Direct Energy Transfer, DET) and maximum power tracking (Maximum Power Point Tracking, MPPT). The DET method adopts the design method of constant voltage point, and the number of series connection of the solar array is designed according to the working point voltage at the end of the service life. Different from the existing DET method, the MPPT method controls the output voltage of the solar array to make it work near the maximum power point. The solar array can output the maximum power under various environmental conditions and different life stages, reducing the solar array area and The discharge depth of the battery re...

Claims

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Application Information

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IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 陈达兴戴永亮丁一宁陈姝慧朱景春邢航航
Owner SHANGHAI INST OF SPACE POWER SOURCES
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