AC-into-DC-system detection and forced tripping device

A DC system and AC technology, applied in the direction of measuring devices, general control systems, control/regulation systems, etc., can solve problems such as unmanageable and single functions, and achieve the effects of automatic prevention and control, enhanced safety, and saving manpower and material resources

Active Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +2
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are also some detection methods and equipment for the fault of AC intrusion into the DC system, which can test the amplitude of the AC intrusion and the specific fault circuit, but they all have a single function and can only detect and cannot be treated.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The invention is a detection and forced jumping device for alternating current intruding into a direct current system.

[0012] One end of the first DC blocking capacitor and the second DC blocking capacitor are respectively connected to the positive busbar of the DC system and the negative busbar of the DC system, and the other ends of the first DC blocking capacitor and the second DC blocking capacitor are respectively connected to the AC voltage transmitter (signal conditioning The input terminal of the conditioning circuit) and the output terminal are connected to the A / D interface of the microprocessor to form a channeling AC sampling circuit of the device.

[0013] The key unit and the display unit are respectively connected to the keyboard and the display interface of the microprocessor to realize the input and display functions of the device, and of course neither of them can be connected. The two I / O ports of the microprocessor are respectively connected to pin...

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 relates to an AC-into-DC-system detection and forced tripping device. The AC-into-DC-system detection and forced tripping device is characterized in that a DC system positive pole bus (+KM) is connected with one input end of an AC signal transmitter through a first DC blocking capacitor (C1); a DC system negative pole bus (-KM) is connected with another input end of the AC signal transmitter through a second DC blocking capacitor (C2); the output end of the AC signal transmitter is connected with a microprocessor; the two ports of the microprocessor are connected with the control end of a first optical coupler (OP1) and the control end of a second optical coupler (OP2) respectively; the output end of the first optical coupler (OP1) is connected in series with a coil of a first contactor (S1); and the output end of the second optical coupler (OP2) is connected in series with a coil of a second contactor (S2). The AC-into-DC-system detection and forced tripping device can realize on-line and real-time detection of the AC-into-DC fault, and meanwhile, can enable an AC or DC switch on a loop where the AC is mixed to be tripped in a forced manner to isolate the fault branch.

Description

technical field [0001] The invention relates to a detection and forced tripping device for alternating current intruding into a direct current system. Background technique [0002] In the substation, the DC system provides DC power for control, signal, relay protection, automatic device and emergency lighting, etc. The stable and reliable operation of the DC power supply plays a very important role in the safety and stability of the power system. However, due to the wide coverage of the DC system and the complex environment, faults of AC intrusion into the DC system occur from time to time, which can cause serious accidents such as metallic grounding of the DC system, false alarms of monitoring devices, and misoperation of relay protection devices, which are extremely harmful. According to the "Eighteen Major Power Grid Anti-Accident Measures of the State Grid Corporation" [2012]: "5.1.1.18.3 Newly built or renovated substations, DC system insulation monitoring devices shoul...

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): G01R19/00G05B19/042
Inventor 吴良方韩力罗强马建辉王浩彬秦庆章王明韩涛张丹杰拓守辉马永奎毛志刚李永增苏国泷马守林邓拓
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap