Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Communication-free working mode selection method applied to series photovoltaic power optimizers

A technology of power optimizer and working mode, applied in photovoltaic power generation, parallel operation of DC power supply, DC network circuit devices, etc., can solve the problems of increasing system control complexity, increasing cost, and high communication system requirements, reducing hardware costs and reducing hardware costs. Installation cost, effect of safe boot

Active Publication Date: 2021-10-08
ZHEJIANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Traditional control methods require communication modules to ensure system startup, protection and stable operation, which will inevitably increase costs and increase the complexity of system control. is also very demanding

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Communication-free working mode selection method applied to series photovoltaic power optimizers
  • Communication-free working mode selection method applied to series photovoltaic power optimizers
  • Communication-free working mode selection method applied to series photovoltaic power optimizers

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0049] In this embodiment, the structure of a tandem photovoltaic power optimizer system, such as figure 1 Indicated. The example consists of three photovoltaic modules, and the corresponding three photovoltaic power optimizer. Known voltage DC bus V bus , The DC bus may be a variety of ways (battery, DC-DC converter, photovoltaic inverter, etc.) are given;

[0050] Tandem photovoltaic power optimizer no communication mode selection method of the processes figure 2 Indicated. Power optimizer uses pre-Boost topology, previous stage to achieve the maximum power point tracking of the photovoltaic panels, and selection method to determine the current operation state according to the mode of the present invention. After setting the threshold number of starts n = 2, there are two or more photovoltaic module receives the light, the system can be started smoothly.

[0051] Intermediate DC bus voltage level is controlled by a battery, are:

[0052] V bus = V out1 + V out2 + V out3

[0053...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a distributed photovoltaic power generation technology, and aims to provide a communication-free working mode selection method applied to series photovoltaic power optimizers. The method comprises the steps that a power optimizer detects the output voltage of the power optimizer after being started, the power optimizer is turned on when the output voltage is lower than the lower limit of a hysteresis threshold, and the power optimizer is turned off when the output voltage is higher than the upper limit of the hysteresis threshold; after the illumination condition meets the threshold value of the starting number of the power optimizers, the whole series photovoltaic power optimizer system is started and transmits power to a backward stage; after the system is started, when the output voltage is higher than a shutdown threshold value, the power optimizer enters a standby state and waits for the change of an illumination condition; in the standby state, when it is detected that the output voltage is lower than a restart threshold value, the power optimizer is restarted. The power optimizers select the working modes according to the electrical parameters of the ports of the power optimizers, each power optimizer does not need a communication module, safe starting, operation, shutdown and restarting can be achieved, and the hardware cost and the installation cost are reduced.

Description

Technical field [0001] The present invention relates to the field of distributed photovoltaic power generation, and more particularly to an operation mode selection method applied to a series-type photovoltaic power optimizer. Background technique [0002] Solar safety, clean, efficient, sustainable, extensive distribution, and thus the development of photovoltaic industry is developing rapidly. The series power optimizer structure is one of a variety of photovoltaic power generation system, and the power optimizer controls the photovoltaic battery output voltage, achieving the maximum power point tracking (MPPT), and the output terminal constitutes a DC bus backward system. The series-type power optimizer structure can effectively solve the shadow occlusion, the unempline caused by the aging of components, has the characteristics of high modular, low cost, high flexibility. [0003] Each photovoltaic component in the series power optimizer system connects the corresponding power...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10
CPCH02J1/102H02J2300/26Y02E10/56
Inventor 齐继志陈敏韩放郑睿瑞傅钰泰
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com