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

System and method for testing withstand voltage between DC voltage support capacitor terminals

A technology of withstand voltage test and DC voltage, applied in the direction of testing dielectric strength, instruments, measuring electricity, etc., can solve problems such as easy safety accidents, insufficient consideration of personnel safety, and inability to provide suitable test voltages for capacitor types.

Active Publication Date: 2018-09-11
JIANGSU ELECTRIC POWER CO +2
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few rationally designed withstand voltage test systems between capacitor terminals. Most test systems use a power supply with fixed voltage output to provide working voltage for the test circuit, but cannot provide a suitable test voltage for specific capacitor types; some test methods are difficult for personnel. The safety of the battery is also insufficiently considered. During the test, high voltage is accumulated at both ends of the capacitor, and safety accidents are prone to occur when the insulation work is not in place; in the prior art, there is also the problem of low discharge efficiency of the tested capacitor

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
  • System and method for testing withstand voltage between DC voltage support capacitor terminals
  • System and method for testing withstand voltage between DC voltage support capacitor terminals
  • System and method for testing withstand voltage between DC voltage support capacitor terminals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In one embodiment of the present invention, a DC voltage support capacitor terminal withstand voltage test system is provided, the test system includes a DC charging power supply device (such as figure 2 shown) and test and discharge circuits (such as figure 1 shown), see figure 2 , the input end of the DC charging power supply device is connected to the power frequency grid, the DC charging power supply device is used to convert alternating current to direct current, and the output end of the DC charging power supply device is connected to the test and discharge circuit;

[0039] like figure 1 As shown, the test and discharge circuit includes a test unit and a discharge unit, and the test unit includes one or more test modules connected in parallel to the output terminal of the DC charging power supply device, for example, figure 1 Among them are five test modules, each test module includes a DC fuse 1 connected in series and a capacitor 2 to be tested, that is, fi...

Embodiment 2

[0046] In one embodiment of the present invention, a test method based on the above-mentioned withstand voltage test system between terminals of DC voltage support capacitors is also provided, see Figure 4 , the method includes the following steps:

[0047] S1. Wiring according to the test and discharge circuit, and disconnect all switching switches of the discharge unit;

[0048] S2. Connect the output end of the DC charging power supply device to the test and discharge circuit, and connect the input end of the DC charging power supply device to the power frequency grid;

[0049] S3. Continue the test for a certain period of time. If the fuse is disconnected, the withstand voltage test fails, and S4 is executed, otherwise, S5 and S6 are executed;

[0050] S4. Use the fault discharge module to discharge the capacitor that has completed the withstand voltage test, and end the test;

[0051] S5, using the main discharge module to discharge the capacitor that has completed 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

The invention discloses a system and method for testing a withstand voltage between DC voltage support capacitor terminals, and the system comprises a DC charging power device and a testing and discharging circuit. The DC charging power device is used for converting AC power into DC power, and outputting the DC power to the testing and discharging circuit for connection. The testing and discharging circuit comprises a testing unit and a discharging unit, and the testing unit comprises one or more parallel testing modules, wherein each testing module comprises a DC fuse and a to-be-tested capacitor, which are connected in series. The discharging unit is used for discharging a capacitor which has completed the withstand voltage testing, and comprises a main discharging module and a fault discharging module. The system employs a modular power design, provides different test voltages for different capacitors, gives full consideration to the test safety and discharge effectiveness, is simple in test method, and is high in reliability of a testing result.

Description

technical field [0001] The invention relates to the field of flexible direct current transmission engineering, in particular to a withstand voltage test system and a test method between terminals of a direct current voltage support capacitor. Background technique [0002] The DC voltage support capacitor is one of the main components of the converter valve in the flexible DC transmission system. It mainly plays the role of filtering, energy storage and protection, so it is required to have extremely high DC voltage tolerance. As one of the withstand voltage test items in the type and routine tests of capacitors, the withstand voltage test between terminals can intuitively and effectively evaluate the DC withstand voltage level of capacitors. [0003] At present, there are few rationally designed withstand voltage test systems between capacitor terminals. Most test systems use a power supply with fixed voltage output to provide working voltage for the test circuit, but cannot...

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): G01R31/12
CPCG01R31/1227
Inventor 张志昌吴健徐近龙任孟干吕东董晓峰栾洪州张宇宁高阳明
Owner JIANGSU 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