Sine wave inverter parallel system with variable current ratio

A current ratio and inverter technology, which is applied in the direction of irreversible DC power input conversion to AC power output, AC power input conversion to DC power output, electrical components, etc., can solve the complex control scheme and cannot realize different capacity inverters Transformer parallel connection and other problems, to achieve good steady-state and dynamic performance, good maintainability, simple control method

Inactive Publication Date: 2011-07-13
STATE GRID ELECTRIC POWER RES INST +1
View PDF3 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problems of complex control schemes and inability to realize parallel connection of inverters with different capacities existing in the existing inverter parallel connection system, and proposes a redundant inverter parallel conne

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
  • Sine wave inverter parallel system with variable current ratio
  • Sine wave inverter parallel system with variable current ratio
  • Sine wave inverter parallel system with variable current ratio

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] figure 1 It is a functional block diagram of the sine wave inverter parallel system of the present invention. It can be seen from the figure that the system consists of a monitoring management unit and n inverter power supply modules connected in parallel. Among them, the monitoring and management unit is connected with all inverter power supply modules through communication signal lines, and its main functions are: on the one hand, collect relevant data of each parallel module and upload it to the upper-level monitoring system; on the other hand, receive and execute instructions from the upper-level monitoring system , to control and manage the parallel system.

[0032] figure 2 and image 3 The circuit schematic diagram and control block diagram of the inverter power supply module adopting the double-closed-loop instantaneous feedback control technology of output voltage and output filter inductor current are given respectively. The module is mainly composed of i...

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 discloses a sine wave inverter parallel system with variable current ratio, which is characterized by comprising a monitoring management unit and one or a plurality of inverter power supply modules in redundancy parallel operation; the monitoring management unit is connected with all the inverter power supply modules through a communication signal wire; the inverter power supply modules are mutually connected by the communication signal wires, synchronous signal wires and average current signal wires; and each inverter power supply module is simultaneously connected with a DC (Direct Current) input end and an AC (Alternating Current) output end. The proportion of the load current shared by each module of the parallel system provided by the invention can be set as required so as to meet the requirements on uniform load current sharing (current equalization) by parallel inverter power supply modules with same capacity or load current sharing by the inverter power supply modules with different capacities in the parallel system according to different proportions, so that the parallel function of the inverter power supply modules with different capacities is realized.

Description

technical field [0001] The invention relates to the field of AC inverter power supplies, in particular to a sine wave inverter parallel system with variable current ratio. Background technique [0002] The inverter is a power electronic conversion device that converts DC power into AC power, and its main function is to provide AC power for electrical equipment. The sine wave inverter refers to the inverter whose AC output voltage is a sine wave, and the inverters in the following descriptions all refer to the sine wave inverter. [0003] In the case of using the inverter to supply power to the load, in order to improve the reliability of the inverter power supply system, or when the capacity of a single inverter cannot meet the load demand, multiple modules can be used to form an inverter parallel system to Work. In order to make the system have a capacity corresponding to the number of modules connected in parallel, it is required that each inverter connected in parallel ...

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
IPC IPC(8): H02M7/42H02M7/5387
Inventor 陈良亮尹宏旭洪福斌张蓓蓓吴鸣董浩鲍恩奇
Owner STATE GRID ELECTRIC POWER RES INST
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