Solar grid-connected electricity-generation energy output maximization circuit structure

A technology of energy output and circuit structure, applied in the field of power system, can solve problems such as energy waste, non-uniform potential field damage excitation ability, fading, etc.

Inactive Publication Date: 2006-12-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it will not only cause a waste of energy, but also cause the non-uniform potential field to be destroyed and the excitation ability to decline.

Method used

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  • Solar grid-connected electricity-generation energy output maximization circuit structure
  • Solar grid-connected electricity-generation energy output maximization circuit structure
  • Solar grid-connected electricity-generation energy output maximization circuit structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Embodiment: The rated output voltage of the solar cell group 1 is 48V, and there are 6 basic inverter units 2 , 1 soft connector 3 and 1 controller 4 .

[0022] Condition: The flexible connector has any structural form and its conversion that can realize the serial / parallel connection of the six basic inverter units 2 with each other.

[0023] Control strategy: the controller 4 controls the power electronic switching devices in the six basic inverter units 2 to turn on or off, and the on / off time is 10ms, and controls the soft connector 3 to connect the six basic inverter units 2 in series / parallel Connection, serial / parallel state control time is determined by PWM (pulse width modulation) control strategy.

[0024] The specific process is as follows:

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PUM

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Abstract

The invention discloses a solar interconnected power generation energy output maximum circuit structure in the electric system technology, which comprises the following parts: solar battery group, basic inversed unit, flexible connector and controller to form multi-level concatenation inversion topological structure, wherein the solar battery group is composed of individual solar battery board to form combination board block of 48V nominal voltage output through cascading or paralleling pattern; the basic inversion unit is composed of electric electronic switch element to form bridge-patterned circuit; the solar battery voltage is controlled by passing or breaking time of four switch elements, which makes basic inversing unit output positive, zero, negative three-conditioned step voltage within time; the flexible connector is composed of electric electronic switch, which solves cascading or paralleling relationship of inversed unit mutually through PWM strategy. The invention realizes the output of step differentiated sine AC power of system topological structure, which maximizes energy output.

Description

technical field [0001] The invention relates to a circuit structure in the technical field of electric power systems, in particular to a circuit structure for maximizing energy output of solar grid-connected power generation. Background technique [0002] Aiming at the current increasingly tense energy and increasingly prominent environmental protection issues, solar energy, as a renewable energy source, has become a research hotspot in the development of new energy technologies in the world to supplement electric energy to the grid by means of grid-connected power generation. The key technology of photovoltaic grid-connected power generation is: how to make the photovoltaic array output the maximum power and transmit it to the user or the grid as safely and efficiently as possible. The above problems depend on the technological achievements in three aspects: power electronic devices, inverter circuit topology and inverter control strategy. [0003] The multi-level cascaded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00G05F1/67H02J3/38H02S40/30H02S40/32
CPCY02E10/58Y02E10/56
Inventor 曾国辉张秀彬赵兴勇肖杭
Owner SHANGHAI JIAO TONG UNIV
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