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

Method for achieving arc suppression coil function by using high-voltage cascading type SVG

A technology of arc suppressing coil and high-voltage cascading, which is applied to emergency protection circuit devices, electrical components, and AC networks used to limit overcurrent/overvoltage to reduce harmonics/ripples, etc., and can solve the problem that the compensation function cannot be satisfied, etc. problems, to achieve the effect of simple implementation, elimination of capacitive current to ground, and flexible conversion

Active Publication Date: 2013-12-11
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme cooperates with the active dynamic reactive power and harmonic compensation device through the non-adjustable arc suppression coil, which can accurately compensate the single-phase grounding capacitance current, but the compensation device is connected between the neutral point and the ground, which cannot meet the normal Compensation function under state

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 achieving arc suppression coil function by using high-voltage cascading type SVG
  • Method for achieving arc suppression coil function by using high-voltage cascading type SVG

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0025] Such as figure 1 As shown, the present invention uses high-voltage cascaded SVG to realize the method for arc suppression coil function, the steps are:

[0026] (1) Monitor whether the system is running normally. When the system is running normally, turn to step (2); when the system is not running normally, exit and end the operation;

[0027] (2) Disconnect the neutral point grounding switch, close the access breaker to start the reactive power compensation and harmonic control function mode; control the cascaded SVG converter to perform system reactive power compensation, eliminate harmonics, and monitor the bus at the same time Voltage; judge whether the neutral point of the bus voltage is shifted or zero-sequence voltage is generated, if yes, go to s...

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 a method for achieving an arc suppression coil function by using a high-voltage cascading type SVG. The method includes the steps of 1) monitoring whether a system runs normally or not, 2) when the system runs normally, starting a reactive compensation mode and a harmonic suppression function mode, controlling a cascading type SVG converter to perform system reactive compensation and harmonic cancellation, meanwhile, monitoring bus voltage, judging whether a neutral point of the bus voltage deviates and generates zero-sequence voltage or not, if the neutral point of the bus voltage deviates and generates the zero-sequence voltage, executing the step 3), and otherwise, keeping the current operation state, 3) starting an arc suppression coil function mode, controlling the cascading type SVG converter to compensate ungrounded phase grounding capacitive current, and meanwhile monitoring the bus voltage, judging whether deviation and the zero-sequence voltage of the neutral point of the bus voltage disappear or not, if deviation and the zero-sequence voltage of the neutral point of the bus voltage disappear, executing the step 2), and otherwise keeping the current operation state. The method has the advantages of being simple to achieve and capable of adjusting automatically, having the dual function modes, and being flexible in mode conversion.

Description

technical field [0001] The invention mainly relates to the field of neutral point ungrounded systems, in particular to a method for realizing the function of an arc suppression coil by using a high-voltage cascaded SVG in a neutral point ungrounded system. Background technique [0002] Reactive power and harmonic current problems are common in 35kV and below neutral point non-directly grounded systems, which are generally equipped with various types of control devices, typically including active var generators (SVG) and dynamic var compensation devices (SVC), capacitance compensation device (FC), etc. With the development of technology, SVG devices in the small and medium capacity range have been widely used due to their superior performance and convenient construction. In addition, most of the power supply lines of systems below 35kV whose neutral point is not directly grounded are cables, and have a large ground capacitance. When a single-phase ground fault occurs, the gr...

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): H02J3/01H02H9/08
CPCY02E40/40
Inventor 王才孝黄燕艳周方圆龙礼兰涂绍平吴强沈辉邱文俊吴明水朱建波胡前吴选保文韬张典龚芬
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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