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

A low-cost device and method for controlling power grid voltage dips and short-term interruptions

A power grid voltage and low-cost technology, applied in the field of distribution network, can solve the problems of large energy storage capacity configuration, high energy consumption and maintenance costs, and difficult promotion, so as to reduce the overall volume and cost, reduce the overall cost, and reduce the The effect of design costs

Active Publication Date: 2020-04-03
NANJING HEXI ELECTRIC CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The real-time online series compensation method AVC compensates the voltage, no energy storage device is required, the energy consumption is extremely low, and the cost is also low. It can cope with frequent and mild voltage dips. Equipment fails to meet compensation requirements
The off-line parallel inverter compensation method DVR includes an energy storage device. Through the inverter voltage method, a wide range of deep compensation can be achieved, but limited by its energy storage capacity, it is not suitable for frequent voltage drops, and it needs to face high energy consumption and Maintenance cost, energy storage capacity needs to be configured relatively large, investment cost is high, and promotion is difficult

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 low-cost device and method for controlling power grid voltage dips and short-term interruptions
  • A low-cost device and method for controlling power grid voltage dips and short-term interruptions
  • A low-cost device and method for controlling power grid voltage dips and short-term interruptions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] figure 1 It shows a specific structural diagram of a low-cost compensation device for controlling power grid voltage sags and short-term interruptions. The energy storage unit and the parallel inverter are connected in series between the system power supply and the sensitive load.

[0033] The fast switching units SCR1 and SCR2 are respectively connected to the main power supply and the backup power supply, and are mainly used for the switching of the dual power supply; the two bypass mechanical maintenance switch units are respectively connected in parallel with SCR1 and SCR2, and are mainly used for SCR1 and SCR2 failure. Bypass operation prevents the interruption of load power supply when the AC fast switch fails; the DC energy storage unit is mainly used to provide the active power provided by SCR1 and SCR2 to the load during the switching process; during the switching process of SCR1 and SCR2, parallel inverters need Obtain energy from the DC energy storage unit, ...

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 an apparatus and method for the low-cost control of voltage sag and short-term interruption of a power grid. The method employs a double-channel power supply for solving a problem of the quick mutual switching of load power supply reliability and employs the advantages of the conventional DVR, and combines the two sides, so the apparatus can solve a problem of voltage sag and energy quality which commonly exist in the power grid, effectively guarantees the power utilization reliability of a sensitive load, solves problems that the energy storage element in a conventional voltage sag compensation device is expensive and difficult to maintain, can reduce the energy consumption, can save the installation space, can reduce the operation cost of the apparatus, and is very good in economic benefits.

Description

technical field [0001] The invention relates to the field of distribution networks, in particular to a low-cost device and method for controlling voltage sags and short-term interruptions of power networks. Background technique [0002] Voltage sag is the most common power quality problem in the field of industrial power consumption. It is specifically manifested as a short-term voltage interruption, or a sudden drop in the effective value of the voltage and then a rapid recovery. Voltage sags are mostly accidental emergencies with a high frequency of occurrence, and the cause of the fault is complex and difficult to troubleshoot. With the increasing degree of industrial automation and the extensive use of sensitive loads such as precision electronic equipment, equipment shutdown due to power supply voltage disturbances will cause serious economic losses. [0003] For most factories with large power consumption, there are generally two 10kV / 35kV high-voltage incoming lines,...

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): H02J3/00H02J3/32
CPCH02J3/0073H02J3/32
Inventor 黄晓辉袁景李志国
Owner NANJING HEXI ELECTRIC 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