System and method for judging small-disturbance stability of grid-connected photovoltaic system on basis of FPGA (Field Programmable Gate Array)

A photovoltaic system and stability technology, applied in photovoltaic power generation, single-grid parallel feeding arrangement, special data processing applications, etc., can solve the lack of mechanism analysis of photovoltaic power generation system stability, no controller parameters are designed, and no detailed consideration is given. Mathematical model of photovoltaic cell group and control model of grid-connected inverter

Active Publication Date: 2014-01-22
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) The mathematical model of the photovoltaic battery pack and the control model of the grid-connected inverter are not considered in detail
[0005] (2) There is a lack of mechanism analysis on the stability of photovoltaic power generation systems, and there is no design of appropriate controller parameters

Method used

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  • System and method for judging small-disturbance stability of grid-connected photovoltaic system on basis of FPGA (Field Programmable Gate Array)
  • System and method for judging small-disturbance stability of grid-connected photovoltaic system on basis of FPGA (Field Programmable Gate Array)
  • System and method for judging small-disturbance stability of grid-connected photovoltaic system on basis of FPGA (Field Programmable Gate Array)

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Embodiment

[0049] Embodiment: a small disturbance stability judging system of a grid-connected photovoltaic system based on FPGA (see figure 1 ), including a power grid, is characterized in that it includes a photovoltaic array, a Boost DC conversion unit, a DC / AC AC conversion unit, a filtering unit, an interface circuit, a display unit and a central processing unit; wherein, the input terminal of the Boost DC conversion unit receives The output current of the photovoltaic array is connected to the input end of the DC / AC AC conversion unit; the input end of the filter unit is connected to the output end of the DC / AC AC conversion unit, and the output end is connected to the power grid; the interface circuit The collected signal is output to the central processing unit, and the output terminal of the central processing unit is connected to the display unit.

[0050] The filtering unit (see figure 1 ) is the LC filter.

[0051] The interface circuit (see figure 1 ) is composed of a vol...

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Abstract

The invention relates to a system for judging small-disturbance stability of a grid-connected photovoltaic system on basis of an FPGA (Field Programmable Gate Array), which is characterized by comprising a photovoltaic array, a Boost DC (Direct Current) conversion unit, a DC/AC (Direct Current/Alternating Current) conversion unit, a filtering unit, an interface circuit, a display unit and a central processing unit. A working method of the system comprises the steps of voltage and current signal acquisition, detection, calculation and display. The system has the advantages that 1, accuracy is high and universality is strong; 2, a small amount of variables are required and the system is easy to implement; and 3, hardware adopts the high-performance XC4VSX35-type FPGA, high-speed computation can be carried out and an accurate computing result is provided.

Description

(1) Technical field: [0001] The invention is used in a grid-connected photovoltaic system, and relates to the field of control theory and photovoltaic grid-connected technology, in particular a system and method for judging small disturbance stability of a grid-connected photovoltaic system based on FPGA (Field Programmable Gate Array—Field Programmable Gate Array). (2) Background technology: [0002] Due to the world's energy shortage and increasingly serious environmental pollution problems, photovoltaic power generation has attracted more and more attention from all over the world. Photovoltaic grid-connected power generation is the development trend of photovoltaic power generation technology in the world, and it is an important technical step for the photovoltaic industry to enter the stage of large-scale application and become the core part of the power industry. With my country's continuous emphasis on and strong support for photovoltaic grid-connected power generatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06F19/00
CPCY02E10/56
Inventor 周雪松吴家瑞马幼捷李季李超徐晓宁陈墨侯兆豪吴浩
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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