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Grid-connected photovoltaic generation system taking regard of cloud shielding

A photovoltaic power generation system and cloud shading technology, applied in photovoltaic power generation, photovoltaic modules, AC network circuits, etc., can solve problems such as system operation fluctuations, frequent charging and discharging of batteries, and complex harmonic components injected into the grid, and achieve stable and efficient output Effect

Inactive Publication Date: 2017-05-10
南京恒誉名翔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of serious shading and drastic changes, the system operation will fluctuate greatly. When the photovoltaic power generation system is connected to the grid, the system fluctuation will lead to more complex harmonic components injected into the grid and poor power quality.
[0005] 2. Affect the service life of other parts of the system
It is difficult to continuously meet the demand of the load, which will also lead to frequent charging and discharging of the battery
This will greatly affect the actual storage capacity and service life of the energy storage module

Method used

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  • Grid-connected photovoltaic generation system taking regard of cloud shielding
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  • Grid-connected photovoltaic generation system taking regard of cloud shielding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] As shown in the figure, the grid-connected photovoltaic power generation system considering cloud shading includes a control module and an electrical module, the control module is connected to the control electrical module; the electrical module consists of a photovoltaic array, a switch matrix, a DC / DC converter, and grid inverters and transformers; the control module is a configuration control algorithm; the photovoltaic array is composed of multiple photovoltaic modules; the photovoltaic modules are connected to a switch matrix, and the switch matrix is ​​connected to a DC / DC converter. The / DC converter is connected to the grid-connected inverter, the grid-connected inverter is connected to the transformer, and the transformer is connected to the grid; the grid is connected to the grid-connected inverter and the DC / DC converter through the inverter control circuit; the switch The matrix is ​​connected to the DC / DC converter through the MPPT solar controller; the conf...

Embodiment 2

[0021] The photovoltaic array adopts a 3×3 array of small photovoltaic power generation. The entire array is composed of 9 photovoltaic panels connected by a switch matrix, and the photovoltaic array structure adopts a complete cross structure.

Embodiment 3

[0023] When the light is uniform, the working process of the system is as follows: the photovoltaic module forms a photovoltaic array with a TCT structure under the connection of the switch matrix, and the photovoltaic array receives light to generate electric energy; due to the nonlinear output characteristics of the photovoltaic module, the MPPT solar controller detects the photovoltaic The output parameters of the array, and then generate trigger pulses to drive the DC / DC converter; the MPPT solar controller makes the entire system work at the maximum power point; the DC generated by the photovoltaic array is connected to the grid-connected inverter, and the inverter The drive circuit detects the parameters of the power grid and the DC side of the inverter, and generates a PWM control signal to drive the inverter to successfully invert and connect to the grid.

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Abstract

A grid-connected photovoltaic generation system taking regard of cloud shielding comprises a control module and an electrical module. The control module is connected with and is configured to control the electrical module; the electrical module is composed of a photovoltaic array, a switch matrix, a DC / DC converter, a grid-connected inverter and a transformer; the control module is the configuration control algorithm; the photovoltaic array is composed of a plurality of photovoltaic modules; the photovoltaic modules are connected with the switch matrix, the switch matrix is connected with the DC / DC converter, the DC / DC converter is connected with the grid-connected inverter, the grid-connected inverter is connected with the transformer, and the transformer is connected with the power grid; the power grid is connected with the grid-connected inverter and the DC / DC converter through an inverter control circuit; the switch matrix is connected with the DC / DC converter through an MPPT solar energy controller; the configuration control algorithm is connected with a plurality of photovoltaic modules; and the control module is connected with the switch matrix through the switch matrix driving circuit. The grid-connected photovoltaic generation system taking regard of the cloud shielding improves the disadvantage of the cloud shielding problem of a traditional photovoltaic power generation system to allow the photovoltaic generation system to keep stable and efficient output in the condition of cloud shielding.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a grid-connected photovoltaic power generation system considering cloud occlusion. Background technique [0002] Fossil fuels are still widely used in today's society, but fossil fuels will eventually run out one day. And the environmental problems caused by the extensive use of fossil fuels are becoming more and more serious, seriously affecting the normal life and physical and mental health of human beings. Humans urgently need to find a clean and reliable new energy source to replace fossil fuels. Solar energy is the energy with the largest reserves that human beings can utilize. Human beings have a very long history of using solar energy. Strictly speaking, the fossil fuels used today are also stored in special forms of ancient solar energy. As a new type of renewable energy, solar energy has the characteristics of large energy reserves, no regional differences...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02S40/32H02S20/32
CPCH02J3/385H02S20/32H02S40/32Y02E10/56
Inventor 李冰李相武王瑛费浚纯吴佳男
Owner 南京恒誉名翔科技有限公司
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