Middle-high voltage energy conversion system

An energy conversion, medium and high voltage technology, used in control/regulation systems, flexible AC transmission systems, DC power input conversion to DC power output, etc., can solve the problem of poor system output stability and reliability, isolated DC/DC converters Complex control strategy and high cost

Active Publication Date: 2018-10-09
SUNGROW POWER SUPPLY CO LTD
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a medium and high voltage energy conversion system to solve the problems of complex control strategy, high cost, and poor stability and reliability of system output in the prior art for isolated DC / DC converters

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
  • Middle-high voltage energy conversion system
  • Middle-high voltage energy conversion system
  • Middle-high voltage energy conversion system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0063] The invention provides a medium and high voltage energy conversion system to solve the problem of low efficiency of isolated DC / DC converters in the prior art.

[0064] Specifically, the medium and high voltage energy conversion system includes a system communication module, a system detection module and a system auxiliary power supply, at least one system controller and its three phase circuits, and the three phase circuits can be Figure 1a with Figure 2a shown in star connection,...

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 middle-high voltage energy conversion system. The input end of each high-voltage isolation type DC/DC converter in a phase circuit is connected with a public DC bus, and eachhigh-voltage isolation type DC/DC converter adopts an opened loop/closed loop control policy so as to adjust the DC input voltage of the own connected cascading module to an instruction value relatedto the voltage of the public DC bus; the system controller at least adopts the voltage-current dual-loop control policy so as to compute three phase modulation instructions sent to various cascading modules of three phases according to the parameter related to the voltage of the public DC bus, and the grid-connected control of three phase circuits is realized; and then each high-voltage isolationtype DC/DC converter can realize the modular control by using the same policy, the current sharing can be realized without using the coupling control in the prior art, and the problems of complex control policy, high cost, and bad system output stability and the reliability caused by the coupling control in the prior art are avoided.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a medium and high voltage energy conversion system. Background technique [0002] In the field of photovoltaic power generation, in order to achieve medium and high voltage output, the output ends of multiple H-bridge modules are usually cascaded; a high-voltage isolated DC / DC converter is installed at the input end of each H-bridge module to realize the output of all H-bridge modules. MPPT control connected to photovoltaic panels; and, in order to achieve current sharing, coupling control of each high-voltage isolated DC / DC converter is required, and this coupling control will not only complicate the control strategy of each high-voltage isolated DC / DC converter, The cost is high, and it will also lead to poor stability and reliability of the system output. Contents of the invention [0003] The present invention provides a medium and high voltage energy...

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): H02J3/38H02M3/335
CPCH02J3/383H02M3/33523H02M3/33592H02M3/01H02M3/33573H02J3/1814H02M7/49H02J2300/24H02J3/381Y02E10/56Y02E40/10H02M1/0003H02M1/0077H02M1/007H02J2300/26H02J3/46H02J3/38
Inventor 王新宇赵涛庄加才徐君顾亦磊
Owner SUNGROW POWER SUPPLY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap