Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Distributed power supply grid-connected control method and system

A technology of distributed power supply and control method, which is applied in the direction of single-network parallel feeding arrangement, multi-phase network elimination/reduction of asymmetry, etc., can solve the problem of unable to reduce the three-phase unbalanced state of the distribution network and aggravate the three-phase distribution network Risk of unbalanced state, failure to consider three-phase unbalanced state, etc.

Active Publication Date: 2018-01-26
CHINA AGRI UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the new scenario where large-scale distributed energy is connected to the distribution network and power generation is gradually increasing, the traditional distributed power grid-connected control strategy does not consider the three-phase unbalanced state, and assumes that the distribution network is in a three-phase balanced state. The three-phase balanced current is used as the reference input current of the distributed power supply, but because the voltage is in an unbalanced state, the traditional distributed power grid-connected control strategy cannot reduce the three-phase unbalanced state in the distribution network, and it will further aggravate the distribution The risk of the three-phase unbalanced state of the power grid

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
  • Distributed power supply grid-connected control method and system
  • Distributed power supply grid-connected control method and system
  • Distributed power supply grid-connected control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] figure 1 A flow chart of a distributed power grid-connected control method provided by an embodiment of the present invention, such as figure 1As shown, the method includes: S1, according to the positive sequence voltage of each phase in the three phases of the distributed power supply, the negative sequence voltage of each phase, the active power of each phase ...

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 embodiment of the present invention provides a distributed power supply grid-connected control method and system. According to the present invention, the imbalance state of the system is considered during a grid-connected process, by taking the imbalance amount of the active power as an objective function and utilizing a Lagrange multiplier method, the reference output current of each of the three phases of a distributed power supply is calculated, and the reference output current of each phase is utilized to adjust the actual output current of each phase, so that the grid-connected control of the distributed power supply is realized, and the voltage imbalance degree of a power distribution network is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of distributed power generation in distribution networks, and more specifically, to a distributed power grid-connected control method and system. Background technique [0002] Distributed power generation has extensive economic and social benefits. Today, when energy is increasingly scarce, the country vigorously advocates distributed power generation, especially the use of solar energy, and photovoltaic power generation has been vigorously developed. While distributed generation meets self-sufficiency, the excess power needs to be input into the distribution network for other users. Correspondingly, when distributed generation cannot meet its own supply, the distribution network is required to provide power support. Multiple distributed power sources can be connected to the distribution network independently or form a microgrid system to connect to the distribution network. Compared w...

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): H02J3/38H02J3/26
Inventor 杜松怀邓潘陈定宇盛万兴苏娟刘科研叶华
Owner CHINA AGRI UNIV
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
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