Supercharge Your Innovation With Domain-Expert AI Agents!

Photovoltaic system energy storage isolated three-port dc-dc converter and control method

A technology of DC-DC and control method, applied in the field of energy storage isolated three-port DC-DC converter and its control, can solve the problems affecting the volume and energy loss of power electronic converters, and achieve safety improvement and reduction. The effect of improving volume and efficiency

Active Publication Date: 2021-03-26
HARBIN ENG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a traditional photovoltaic power generation system, the energy generated by photovoltaic cells needs to be imported into the DC bus through a power electronic converter. During this process, energy loss is inevitable. At the same time, the power delivered by photovoltaic cells also affects the power used. The volume of the electronic converter

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
  • Photovoltaic system energy storage isolated three-port dc-dc converter and control method
  • Photovoltaic system energy storage isolated three-port dc-dc converter and control method
  • Photovoltaic system energy storage isolated three-port dc-dc converter and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The following examples describe the present invention in more detail.

[0025] The photovoltaic power generation system is composed of photovoltaic solar cells, energy storage battery, isolated three-port converter and DC bus.

[0026] combine figure 1 , the main circuit topology is an isolated three-port converter, and the three windings of the high-frequency transformer HFT are respectively connected to the full-bridge converter of port 1, port 2 and port 3. Among them, the switch tube S of the full-bridge converter of port 1, port 2, and port 3 1 -S 4 , Q 1 -Q 4 and K 1 -K 4 The duty cycle of each bridge arm is 0.5, the upper and lower switching tubes of each bridge arm are complementary conduction, and the phase shift angle between the adjacent bridge arms of the full-bridge converter of ports 1, 2, and 3 is fixed at 180°. The input of port 1 is directly connected to the DC bus, the output of port 2 is connected to the DC bus after being connected in series w...

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 provides a photovoltaic system energy storage isolation type three-port DC-DC converter and a control method thereof. The input of a port 1 of an isolated three-port converter is connected with a direct-current bus, the output of a port 2 of the isolated three-port converter is connected with a photovoltaic cell in series and then connected into the direct-current bus, and the port 2outputs a voltage to compensate the difference between the voltage of the direct-current bus and the terminal voltage of the photovoltaic cell, so that the photovoltaic cell is in a maximum power acquisition state. A port 3 is connected with the energy storage battery, and the energy storage battery is charged and discharged by adjusting the external phase shift angles of the port 1 and the port3 so as to maintain the stability of the DC bus voltage. According to the invention, energy generated by the photovoltaic cell can be ensured to be directly transmitted to the DC bus. By adopting thetopological structure provided by the invention, the efficiency of the whole photovoltaic power generation system can be remarkably improved on the basis of maintaining the voltage stability of the direct current bus and obtaining the maximum photovoltaic power, and the electrical isolation between the energy storage battery and the photovoltaic power generation system is achieved.

Description

technical field [0001] The present invention relates to a control device for a photovoltaic power generation system. The present invention relates to a control method for a photovoltaic power generation system, in particular to an energy storage isolated three-port DC- DC converter and its control method. Background technique [0002] The increasing depletion of non-renewable energy has rapidly promoted the popularity of new energy power generation in recent years, among which photovoltaic power generation has become one of the hot spots. However, in the photovoltaic power generation system, the problem that photovoltaic cells are prone to mismatch in lighting conditions and lead to a large amount of power loss has received more and more attention and research. How to ensure the maximum degree of photovoltaic energy acquisition and maintain the stable operation of the power generation system has become hot topic of current research. [0003] The main components of the phot...

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 Patents(China)
IPC IPC(8): H02M3/335H02J1/10H02J7/34
CPCH02J1/102H02J7/34H02M3/33576Y02E10/56
Inventor 游江刘洪胜彭辉张镠钟王西贝李晓旭王芳瑞张春雷
Owner HARBIN ENG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com