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

Multi-power-supply gridconnected system control method based on modularized multilevel convertor

A modular multi-level, control method technology, applied in the direction of irreversible DC power input conversion to AC power output, single-network parallel feeding arrangement, etc., can solve the problem of DC component in grid-connected current

Active Publication Date: 2014-11-19
SHANDONG UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inconsistency of the DC power supply voltage will cause a certain DC component in the grid-connected current, which needs to be suppressed

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
  • Multi-power-supply gridconnected system control method based on modularized multilevel convertor
  • Multi-power-supply gridconnected system control method based on modularized multilevel convertor
  • Multi-power-supply gridconnected system control method based on modularized multilevel convertor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] The control strategy of the energy storage system based on MMC consists of four parts: inverter power control, grid-connected power supply maximum power point tracking control and SOC balance control, circulating current control, and grid-connected current DC component suppression. The focus of the present invention is to propose an appropriate control strategy for the problems existing in the multi-level grid-connected system based on MMC, and flexibly control the circulating current and suppress the grid-connected current according to the needs of SOC balance control and maximum power point tracking control. DC component.

[0052] As mentioned above, because the circulating current will cause power loss, it is not desirable to perform power exchange through the interphase circulating current under normal circumstances. When it is necessary to u...

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 multi-power-supply gridconnected system control method based on a modularized multilevel convertor. The multi-power-supply gridconnected system control method comprises the following steps: the power control part of the modularized multilevel convertor generates a sinusoidal modulation wave; the sinusoidal modulated wave is sequentially subject to direct current supply control, an interphase circumfluence control and a gridconnected current direct current component inhibit control to superpose corresponding regulation value, and is finally subject to carrier wave dephasing SPWM modulation to generate a switch driving signal. The multi-power-supply gridconnected system control method can flexibly control the interphase circumfluence according to the operation state of the multi-power-supply gridconnected system.

Description

technical field [0001] The invention relates to a control method for a multi-power grid-connected system based on a modular multilevel converter. Background technique [0002] With the increasing energy crisis and environmental protection issues, the research on renewable energy power generation technology has attracted much attention. In the renewable energy grid-connected power generation system, the power converter is an important part. Renewable energy sources (such as photovoltaic arrays, wind turbines, fuel cells, etc.) connected to the grid need to transmit energy to the grid through inverters. [0003] At present, the power converters commonly used in renewable energy grid-connected power generation systems include two-level inverters, neutral-point clamped multi-level inverters, cascaded multi-level inverters, and modular multi-level inverters. level converter, etc. [0004] For two-level inverters and neutral-point clamped multi-level inverters, after connecting...

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): H02J3/38H02M7/49
Inventor 高峰张磊
Owner SHANDONG 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