Method for improving adaptability of distributed photovoltaics to AC/DC hybrid microgrid

A distributed photovoltaic, AC-DC hybrid technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve problems such as no longer meeting grid-connected standards

Active Publication Date: 2018-08-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the total harmonic distortion (total harmonic distortion, THD) and power factor (power factor, PF) of the grid-connected current of the distributed photovolt...

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
  • Method for improving adaptability of distributed photovoltaics to AC/DC hybrid microgrid
  • Method for improving adaptability of distributed photovoltaics to AC/DC hybrid microgrid
  • Method for improving adaptability of distributed photovoltaics to AC/DC hybrid microgrid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0082] A method for improving the adaptability of a distributed photovoltaic to AC / DC hybrid microgrid according to the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

[0083] A method for improving the adaptability of distributed photovoltaics to AC / DC hybrid microgrids of the present invention can ensure the grid-connected current quality of the system under strong power grid conditions through the setting of the double closed-loop parameters of the distributed photovoltaic single-phase grid-connected system. The method of hysteresis link compensation after virtual impedance and parallel inductance is used to enhance the adaptability of the system to the weak grid.

[0084] Such as figure 1 As shown, a method for improving the adaptability of distributed photovoltaic to AC / DC hybrid microgrid of the present invention includes the following steps:

[0085] 1) Determine the double-closed-loop control parame...

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 method for improving adaptability of distributed photovoltaics to an AC/DC hybrid microgrid. The method includes the steps of determining double closed loop control parametersof a distributed photovoltaic grid-connected system under a strong power grid condition, the double closed loop control parameters including a proportional control factor of a PI controller, an integral control factor of the PI controller and a capacitance current feedback factor; realizing virtual shunt impedance based on output impedance under a weak power grid condition; and determining valueranges of the parameters and shunt inductance of a phase lag link after system compensation. The method provided by the invention ensures that the system can stably run under the strong power grid condition, and at the same time, can satisfy requirements of a stable state and a transient state; and improves adaptability of the system to a weak power grid, i.e., through double closed loop parametersetting under the strong power grid condition, the method provided by the invention ensures grid connection performance under the strong power grid condition, and a method of lag link compensation and shunt inductance after adoption of virtual shunt impedance is employed to improve adaptability of the system to the weak power grid.

Description

technical field [0001] The invention relates to a method for improving adaptability of a microgrid. In particular, it relates to a method for improving the adaptability of distributed photovoltaics to an AC / DC hybrid microgrid. Background technique [0002] With the continuous advancement of my country's industrial process, energy depletion and environmental pollution have gradually become the main factors that curb the progress of modern industry. New energy technologies represented by photovoltaics and wind turbines have gradually entered people's field of vision and gradually occupied an increasing role in my country's energy structure. proportion. The characteristics of distributed photovoltaics, such as self-use and adaptation to local conditions, have developed rapidly in my country. As a key interface between distributed photovoltaics and AC / DC hybrid microgrids, the performance of grid-connected inverters has a decisive impact on the grid-connected performance of di...

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): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 李鹏张新宗王敏刘嘉伟余杰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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