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

A power quality optimization method for distribution transformer area based on photovoltaic inverter

A photovoltaic inverter, power quality technology, applied in the energy industry, electrical components, circuit devices, etc., can solve the problems of user fines, complicated control, and many equipment, etc., to achieve the effect of simple equipment and prevention of reverse current situation

Active Publication Date: 2021-11-02
SHIJIAZHUANG KE IOT TECH CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, for medium-sized industrial and commercial users and schools, hospitals and other application scenarios that can be used as a separate power supply for a station area, photovoltaic power generation will also be generated so that the power factor of the electric energy delivered by the grid to the station area is unqualified, and users face being fined by the grid company question
[0006] The existing technology is to adjust and improve the power quality through the combination of photovoltaic inverters, SVG reactive power compensation, capacitors and other equipment. There are many equipments and complicated control

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
  • A power quality optimization method for distribution transformer area based on photovoltaic inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The application scenarios of this embodiment are medium-sized and above-sized industrial and commercial users, as well as schools, hospitals, etc. that supply power independently in one station area. In this scenario, there are many high-power electrical appliances, and they are responsible for the power factor.

[0048] Firstly, it is judged which situation the current station area is in, and then the calculation process is performed.

[0049] In this embodiment, there are three situations.

[0050] Situation 1: The amount of photovoltaic power generation is relatively large, and putting all of it into use will lead to the risk of backflow. Part of it needs to be used as active power, part of it needs to be put into use as reactive power, and the rest is idle.

[0051] Situation 2: The amount of photovoltaic power generation is small, and all power needs to be invested. Under the premise of ensuring normal power factor, try to make the power put into use close to the ...

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

A photovoltaic inverter-based power quality optimization method for a distribution transformer area belongs to the control technology of a photovoltaic power station and relates to the field of power quality control, in particular a method for optimizing power quality by making full use of the capabilities of a photovoltaic power station. TTU obtains the output threshold and reactive compensation power factor set by the transformer in the station area, obtains the output parameters of the current transformer through AC collection, obtains the available capacity and output parameters of the current photovoltaic power station through communication with the photovoltaic power station, and obtains it through parameter comparison According to the current state of the station area, the output level of the photovoltaic power station is calculated and adjusted according to the state. By adopting the present invention, it is possible to prevent reverse flow in the station area as much as possible, and make full use of the ability of the photovoltaic power generation equipment in the station area to provide active power and reactive power compensation. The equipment is simple, and it is especially applied to medium-sized and above-sized plants that can be used as a separate power supply for a station area. In the application environment of industrial and commercial users, schools, hospitals, etc., users can be prevented from being fined by the power company.

Description

technical field [0001] The invention belongs to the control technology of a photovoltaic power station, and relates to the field of power quality control, in particular to a method for optimizing power quality by making full use of the ability of a photovoltaic power station. Background technique [0002] In order to prevent the electric energy generated by the photovoltaic power generation system from entering the public grid (countercurrent), causing an impact on the public grid and resulting in a decline in the power quality of the public grid, the state has formulated Q / GDW480-2010 "Technical Regulations for Connecting Photovoltaic Power Stations to the Grid", which clearly stipulates that In addition, for areas with weak power grids, photovoltaic power generation systems must be equipped with anti-backflow devices. The State Grid Corporation of China requires that when the photovoltaic power generation system is designed to be irreversible grid-connected, when the rever...

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 Patents(China)
IPC IPC(8): H02J3/38H02J3/48H02J3/50
CPCH02J3/381H02J3/48H02J3/50H02J2300/22Y02P80/20
Inventor 王强李春海郭殿聪陈贺翟志国刘朋飞刘海涛芦斌刘晓龙崔振伟支智勇袁琳琳李世敏汪淼梁芳蕾
Owner SHIJIAZHUANG KE IOT TECH CO LTD
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