MPPT control algorithm transient real-time simulation method and device based on FPGA

A technology of control algorithm and real-time simulation, which is applied in general control systems, design optimization/simulation, control/regulation systems, etc., and can solve problems such as real-time transient simulation of distributed power generation systems that are difficult to implement detailed models

Pending Publication Date: 2022-04-12
TIANJIN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a kind of MPPT control algorithm transient real-time emulation method based on FPGA, to alleviate traditional real-time simulation based on serial hardware such as conventional CPU processor or digital signal processor (DSP) in the prior art. It is difficult for the simulator to realize the technical problem of the real-time transient simulation of the distributed power generation system of the detailed model within a small simulation step size. The maximum power can be tracked in real time by virtue of the adaptive step size to achieve the effect of real-time simulation

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  • MPPT control algorithm transient real-time simulation method and device based on FPGA
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  • MPPT control algorithm transient real-time simulation method and device based on FPGA

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Embodiment 1

[0060] The present invention provides a kind of FPGA-based MPPT control algorithm transient state real-time emulation method, specifically comprises the following steps:

[0061] Construct the simulation topology of photovoltaic array, the simulation topology of described photovoltaic array comprises power supply module, Buck circuit module and load;

[0062] The duty cycle of the Buck circuit module is adjusted so that the equivalent total resistance of the Buck circuit module and the load matches the internal resistance r of the photovoltaic panel of the power module.

[0063] Further, it is necessary to match the equivalent load with the internal resistance of the photovoltaic cell. . Photovoltaic arrays usually match the load impedance with an external power conversion circuit to achieve maximum power output. image 3 As shown, the present invention connects the photovoltaic panel to the load resistance through the Buck circuit, and the FPGA processes the detected power...

Embodiment 2

[0104] The embodiment of the present invention provides a kind of FPGA-based MPPT control algorithm transient real-time simulation device, comprising:

[0105] Topology building module: used to construct the simulation topology of the photovoltaic array, the simulation topology of the photovoltaic array includes a power module, a Buck circuit module and a load;

[0106] Duty cycle adjustment module: used to adjust the duty cycle of the Buck circuit module so that the equivalent total resistance of the Buck circuit module and the load matches the internal resistance r of the photovoltaic panel of the power module.

Embodiment 3

[0108] combine figure 2 as well as image 3 , in the embodiment provided by the present invention, the initial value of the duty cycle is given as 0.5 (the counter value is 200), and then a disturbance in the positive direction is given to perform functional verification on the overall design module on the modelsim software platform, u1 and i1 is the collected u pv and i pv , data2t is the power output by the photovoltaic panel at the current moment, data1t is the output power at the previous moment, d3=|data2t-data1t|, Duty ratio ddt=α*400, duty ratio difference quotient=ΔD=d3 / d4, considering that the base number is 400, taking into account the calculation accuracy and speed, here the step size ΔD is calculated as an approximate integer.

[0109] When the rising edge of the second pulse arrives, it is calculated that data2=56>data1=22, and the change in duty cycle is ΔD=214-201=13>0. At this time, the system judges that it is a disturbance in the positive direction, and ...

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Abstract

The invention provides an MPPT control algorithm transient real-time simulation method and device based on an FPGA, and relates to the technical field of power electronic simulation, and the method specifically comprises the following steps: constructing a simulation topology of a photovoltaic array, the simulation topology of the photovoltaic array comprising a power supply module, a Buck circuit module and a load; and adjusting the duty ratio of the Buck circuit module to enable the equivalent total resistance of the Buck circuit module and the load to be matched with the internal resistance r of the photovoltaic cell panel of the power supply module. According to the method and the device provided by the invention, the technical problem that a traditional real-time simulator based on serial hardware such as a conventional CPU (Central Processing Unit) or a DSP (Digital Signal Processor) in the prior art is difficult to realize transient real-time simulation of the distributed power generation system of a detailed model within a small simulation step length can be relieved; the maximum power can be tracked in real time by means of the self-adaptive step length, so that the real-time simulation effect is achieved.

Description

technical field [0001] The invention relates to the technical field of power electronics simulation, in particular to a method and device for transient real-time simulation of an MPPT control algorithm based on FPGA. Background technique [0002] With the depletion of traditional energy sources, photovoltaic power generation technology has achieved rapid development, and some high-power grid-connected solar power plants have been put into operation. However, when the photovoltaic cell array is working, it is easily affected by factors such as sunlight intensity and ambient temperature, and its output power will vary greatly. In order to output as much electric energy as possible under different sunshine and temperature conditions, finding the maximum power point using MPPT control technology (Maximum Power Point Tracking Technology) has become one of the important issues at present. [0003] The output power of photovoltaic cells has a nonlinear relationship with temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06F30/20G05F1/67G05B17/02
CPCY02E10/56
Inventor 王守相何汝训张春雨赵倩宇袁霜晨
Owner TIANJIN UNIV
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