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Photovoltaic power generation maximum power point tracking fuzzy proportion integration differentiation (PID) control method

A technology of maximum power point and photovoltaic power generation, applied in the direction of photovoltaic power generation, adaptive control, general control system, etc., can solve problems such as differential control, achieve good dynamic performance, both accuracy and rapidity, and eliminate oscillation phenomenon Effect

Inactive Publication Date: 2012-11-28
黄克亚
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Problems solved by technology

However, fuzzy control has no integral link, and belongs to differential control, and the oscillation near the maximum power point still exists

Method used

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  • Photovoltaic power generation maximum power point tracking fuzzy proportion integration differentiation (PID) control method
  • Photovoltaic power generation maximum power point tracking fuzzy proportion integration differentiation (PID) control method

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Embodiment Construction

[0014] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the structural diagram of the fuzzy PID control method for maximum power point tracking of photovoltaic power generation is given. When the system is working, it is first judged which working area it is running in according to the current power value and duty cycle value, and then different algorithms are adopted according to different working areas. track control. The fuzzy control is used for quick response adjustment in the large deviation range, and the conventional PID control is used for the precision adjustment in the small deviation range. Switch between the two control methods through the switch function. In the figure, k1 and k2 are the conversion thresholds of the fuzzy controller and the PID controller. When k1<dP / dD<k2 is satisfied, the PID control is adopted, and the fuzzy control.

[0016] B...

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Abstract

The invention discloses a photovoltaic power generation maximum power point tracking fuzzy proportion integration differentiation (PID) control method which is basically that the duty ratio of a Boost circuit is directly used as a control variable, the conventional PID control is added on the basis of fuzzy control, the fuzzy control is adopted to quickly response and adjust within a large deviation range, the conventional PID control is adopted to accurately adjust within a small deviation range, and two algorithms are switched in a threshold comparison mode. The method realizes both the accuracy and rapidity of photovoltaic power generation maximum power point tracking.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation system output power control, in particular to a fuzzy PID control method for maximum power point tracking of photovoltaic power generation. Background technique [0002] With the global energy crisis and environmental pollution becoming more and more serious, effective and rational use of existing limited resources and environmental protection have become the focus of global attention. Solar photovoltaic power generation has the advantages of no pollution, no noise, inexhaustible and inexhaustible, and has become one of the hotspots in new energy research. However, solar photovoltaic modules are unstable power sources. Changes in illumination, temperature, and load will cause changes in the output power of photovoltaic cells. In order to effectively use solar energy, it is necessary to perform maximum power point tracking (MPPT). [0003] Currently known MPPT algorithms main...

Claims

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Application Information

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IPC IPC(8): G05F1/67G05B13/04
CPCY02E10/58Y02E10/56
Inventor 黄克亚
Owner 黄克亚
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