DSP (digital signal processor) based photovoltaic networking system bifurcation controller and working method thereof

A photovoltaic power generation system and controller technology, applied in the direction of photovoltaic power generation, single-network parallel feeding arrangement, etc.

Inactive Publication Date: 2012-12-19
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies are still in their infancy for the bifurcation control of nonlinear systems. Although there are many methods for controlling bifurcations, if they are related to specific nonlinear dynamical systems, different control strategies have different effects on the system

Method used

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  • DSP (digital signal processor) based photovoltaic networking system bifurcation controller and working method thereof
  • DSP (digital signal processor) based photovoltaic networking system bifurcation controller and working method thereof
  • DSP (digital signal processor) based photovoltaic networking system bifurcation controller and working method thereof

Examples

Experimental program
Comparison scheme
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Embodiment

[0043] Embodiment: a kind of bifurcation controller of photovoltaic grid-connected system based on DSP (see figure 1 ), characterized in that it includes a photovoltaic power generation system, an interface circuit and a DSP control unit; wherein, the photovoltaic power generation system and the interface circuit are bidirectionally connected, receive control signals from the interface circuit and provide sampling data for the interface circuit; the interface circuit It is bidirectionally connected with the DSP control unit, and the DSP control unit receives the sampling data of the interface circuit and provides a driving signal.

[0044] The photovoltaic power generation system (see figure 1 ) consists of a photovoltaic array, a DC / DC conversion unit, a DC / AC conversion unit, an output filter unit and a power grid; wherein, the input terminal of the DC / DC conversion unit receives the output current of the photovoltaic array, and its output terminal is connected to The inp...

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Abstract

The invention discloses a DSP (digital signal processor) based photovoltaic networking system bifurcation controller which is characterized by comprising a photovoltaic power generation system, an interface circuit and a DSP control unit; a working method of the system comprises the steps of signal acquisition, analog-to-digital conversion, bifurcation judgment, instruction issuing and on-off action. The system has the advantages that firstly, the control precision is high, and the stability is strong; secondly, by adding the time-lag feedback control, the bifurcation phenomenon generated by an electric device in the photovoltaic system controller can be solved better; thirdly, the control precision and the control effect are improved; and fourthly, the calculation speed is high, the structure is simple, and the control is easy.

Description

(1) Technical field: [0001] The invention is used in the solar grid-connected photovoltaic power generation industry, and relates to the interdisciplinary field of power electronics technology and control theory, in particular a DSP-based photovoltaic grid-connected system bifurcation controller and its working method. (2) Background technology: [0002] With the intensification of environmental pollution and the shortage of fossil energy, the utilization of renewable resources has attracted much attention, and solar energy has become the focus of utilization due to its clean, abundant and universal characteristics. At present, as one of the main utilization methods of solar energy - photovoltaic power generation has been developed rapidly. The utilization of solar energy mainly includes two forms: thermal utilization and photovoltaic power generation utilization. Among them, photovoltaic grid-connected power generation belonging to the power generation system has become th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 马幼捷蔡莹雪周雪松
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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