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Stability analysis method based on MATLAB microgrid photovoltaic system

A technology of photovoltaic system and analysis method, applied in photovoltaic power generation, electrical components, circuit devices, etc.

Inactive Publication Date: 2016-11-16
TARIM UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, the reason why this power generation method is not popular is that it still has some problems, the most important of which is the stability of the micro-grid, including the stability of the photovoltaic micro-grid itself and the grid-connected stability of the micro-grid

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  • Stability analysis method based on MATLAB microgrid photovoltaic system
  • Stability analysis method based on MATLAB microgrid photovoltaic system
  • Stability analysis method based on MATLAB microgrid photovoltaic system

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] 1 Modeling of photovoltaic cells

[0030] The basic characteristics of a solar cell can be represented by a U-I diagram, and the current, voltage and the relationship between the two are represented by a series of other parameters. Among these parameters, it is most important to consider the sunlight intensity and battery temperature on the surface of solar cells in southern Xinjiang. The relationship between the output voltage and current of the photovoltaic array is as follows:

[0031] When considering solar radiation changes and temperature effects,

[0032] in: du=-βdT-R s dl,dT=T c -T ref The output characteristics of the photovoltaic array can be obtained by establishing the equation group from the above formula. In the formula: A is the ideal factor of the diode, Boltzmann's consta...

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Abstract

The invention discloses a stability analysis method based on an MATLAB microgrid photovoltaic system. A photovoltaic array model is established by using a photovoltaic cell simulation model, so that a whole photovoltaic microgrid system model is established. For the sake of maximum output power of a solar photovoltaic array in a DC-DC power, firstly an MPPT principle is elaborated in detail, and finally modeling and simulation are carried out on MPPT control under an MATLAB / Simulink simulation environment; for the sake of stable and controllable output power of an inverter, firstly research and analysis are carried out on a control technology, and PQ control is selected to prove effectiveness of PQ through verification.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and relates to a method for analyzing the stability of a microgrid photovoltaic system based on MATLAB. Background technique [0002] Photovoltaic power generation is one of the ways to solve energy sustainable development. The currently used photovoltaic power generation methods include independent photovoltaic power generation systems and grid-connected photovoltaic power generation systems. Among them, the photovoltaic grid-connected power generation system can not only effectively use light energy, but also flexibly control the output power to meet the power supply demand of the user. Therefore, grid-connected power generation using photovoltaic microgrids is more popular. However, the reason why this power generation method is not popular is that it still has some problems, the most important of which is the stability of the micro-grid, including the stability of the pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38G06F17/50
CPCG06F30/367H02J3/383H02J3/00H02J2203/20Y02E10/56
Inventor 罗继东李建军王建平王宪磊邹梦丽刘文亮刘媛杰刘润泽
Owner TARIM UNIV
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