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

Power transmission method and system for realizing real-time tracking internal resistance matching

A technology of real-time tracking and power transmission, which is applied in the direction of conversion of AC power input to DC power output, output power conversion equipment, and conversion equipment without intermediate conversion to AC, which can solve the problem of unstable curve and unstable convergence effect of power output , power output jitter and other issues

Active Publication Date: 2019-12-17
JINAN LICHENG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +1
View PDF12 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The simulation results obtained by using the open circuit voltage method and the constant voltage method will oscillate over time, and the power output will have a certain "jitter"; when the external light conditions change suddenly, the power output convergence effect of the disturbance observation method is unstable, and the curve is relatively smooth. smooth

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
  • Power transmission method and system for realizing real-time tracking internal resistance matching
  • Power transmission method and system for realizing real-time tracking internal resistance matching
  • Power transmission method and system for realizing real-time tracking internal resistance matching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1 of the present invention proposes a power transmission method and system for real-time tracking of internal resistance matching. The method first models and selects a Boost circuit boost module of a two-stage three-phase grid-connected photovoltaic power generation system. attached figure 1 It is a schematic diagram of a two-stage three-phase grid-connected photovoltaic power generation system based on Embodiment 1 of the present invention; it includes a photovoltaic cell array, a Boost circuit boost module, an inverter module, and an LC filter module; the photovoltaic cell array boosts the Boost circuit The module provides DC voltage; the Boost circuit boost module is used to boost the DC power input by the photovoltaic cell array; the inverter module converts the DC voltage raised by the Boost circuit boost module into AC; the LC filter circuit is used to realize AC voltage filtering.

[0067] The Boost circuit boost module generates an error signal thro...

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 power transmission method and system for realizing real-time tracking internal resistance matching. The method comprises the steps: carrying out modeling and selection on a Boost circuit boosting module of a two-stage three-phase grid-connected photovoltaic power generation system, and obtaining an equivalent model and a simplified equivalent model of an inverter DC side for an inverter circuit; defining photovoltaic cell internal resistance RST, equivalent input resistance ROUT of the inverter input side and duty ratio DST of a photovoltaic inverter under a standard condition, and calculating photovoltaic cell internal resistance variation delta R1, which changes with the outside world, and duty ratio delta D, which is adjusted with the change of the delta R1; andby changing the delta D, finding real-time match with the photovoltaic cell internal resistance delta R, and realizing photovoltaic power generation maximum power tracking. On the basis of the methodprovided by the invention, the invention further provides the power transmission system for realizing real-time tracking internal resistance matching. On the premise of ensuring tracking accuracy andstability, the method and system realize simplicity and rapidity of a power transmission algorithm for realizing real-time tracking internal resistance matching.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a power transmission method and system for real-time tracking of internal resistance matching. Background technique [0002] In recent years, due to people's high attention to renewable energy, photovoltaic power generation technology has developed rapidly, but there are certain problems in photovoltaic power generation. Since solar radiation is affected by meteorological factors such as seasons and weather, photovoltaic power generation has obvious randomness and volatility. [0003] Compared with other control methods, the constant voltage tracking method, that is, CVT, is easier to operate, the control program design is simple, and there is no shock and vibration at the maximum power point, and it is relatively stable. This is better than other maximum power tracking strategies, but there are some limitations. The set voltage value determines...

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): H02J3/38H02M3/10H02M7/5387
CPCH02M3/10H02M7/5387Y02E10/56
Inventor 安宁贾崇胜李化波刘双喜赵博琛徐现昊王乐秋
Owner JINAN LICHENG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
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