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Smooth power output device used for photovoltaic power generating system and working method thereof

A photovoltaic power generation system and power smoothing technology, which is applied in photovoltaic power generation, circuit devices, light radiation generators, etc., can solve the problem that the system cannot obtain power output, etc., and achieve the effect of simple programming and smooth power output

Inactive Publication Date: 2012-01-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing photovoltaic power generation control strategy often takes the expected power E(x) as the output, but it leads to the problem that the actual power output jumps back and forth around E(x) within a certain period of time, and the jump range is determined by the variance D (x) determined
When D(x) is relatively large, the energy storage system needs to be charged and discharged frequently, and the system cannot obtain stable power output E(x) at all.

Method used

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  • Smooth power output device used for photovoltaic power generating system and working method thereof
  • Smooth power output device used for photovoltaic power generating system and working method thereof
  • Smooth power output device used for photovoltaic power generating system and working method thereof

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Embodiment

[0033] Embodiment: a kind of power smoothing output device for photovoltaic power generation system (see figure 1), including a photovoltaic cell, is characterized in that it is composed of a current sampling module, an A / D conversion module, a logic calculation module, a control circuit module and a DC shunt module; wherein the input of the current sampling module is connected to a photovoltaic cell, and its output terminal is connected to the input end of the A / D conversion module; the output end of the A / D conversion module is connected to the input end of the logic calculation module; the output end of the logic calculation module inputs the calculation result to the control circuit through the A / D conversion module module; the DC shunt circuit module receives the control signal of the control circuit module, adjusts the current of the DC bus, and realizes the smooth output of power.

[0034] The current sampling module (see Figure 7 ) is made up of a current sensor, an ...

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Abstract

The invention relates to a smooth power output device used for a photovoltaic power generating system, which comprises a current sampling module, an A / D (Analog to Digital) conversion module, a logical calculation module, a control circuit module and a DC shunting module. The working method comprises the steps of current sampling, A / D conversion, logical calculation, D / A conversion and control signal output. The working method has the advantages that programming is simple; the problem of intermittent quantitative energy source analysis is solved; the current sampling system is more accurate and reliable; and the stable current output value mu is calculated by using the calculation of one-side confidence interval under the condition of determining output voltage U and stability degree alpha, so that the power output of the photovoltaic system is smooth, stable and reliable.

Description

(1) Technical field: [0001] The invention belongs to the technical field of intermittent energy smooth output of a smart grid, in particular to a power smooth output device for a photovoltaic power generation system and a working method thereof. (two) background technology: [0002] The application of new energy is already an integral part of the well-known smart grid. It is predicted that solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the 21st century, not only to replace some conventional energy sources, but also to become the main body of the world's energy supply. It is estimated that by 2030, renewable energy will account for more than 30% of the total energy structure, and solar photovoltaic power generation will account for more than 10% of the world's total power supply; More than 50% of energy consumption, solar photovoltaic power generation will account for more than 20% of total electricity; by the end of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00H02J1/00G05F1/67
CPCY02E10/56
Inventor 马幼捷马步云周雪松石立国谷月
Owner TIANJIN UNIVERSITY OF TECHNOLOGY