CN201726120U - DC voltage reduction open circuit protector - Google Patents
DC voltage reduction open circuit protector Download PDFInfo
- Publication number
- CN201726120U CN201726120U CN2010202523646U CN201020252364U CN201726120U CN 201726120 U CN201726120 U CN 201726120U CN 2010202523646 U CN2010202523646 U CN 2010202523646U CN 201020252364 U CN201020252364 U CN 201020252364U CN 201726120 U CN201726120 U CN 201726120U
- Authority
- CN
- China
- Prior art keywords
- electronic switch
- reducing device
- voltage reducing
- alarm signal
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a DC voltage reduction open circuit protector which comprises a standby voltage reducing device, an electronic switch and a trigger judging circuit; one end of the electronic switch is connected with the negative end of the standby voltage reducing device; the positive pole of the standby voltage reducing device is connected on an input end port; the other end of the electronic switch is connected on an output end port; the trigger judging circuit is connected between the output end port and the input end port, is connected with the electronic switch and controls the electronic switch; when the circuit of the voltage reducing device of an original DC panel is open and the voltage difference between a closing but and a control but is increased, the trigger judging circuit sends out a trigger signal, the electronic switch is instantly connected, the standby voltage reducing device is connected, and simultaneously, a fault alarm signal output relay is actuated and sends out an alarm signal; if the original voltage reducing device needs to be maintained, the switch of the protector is first manually closed, so that the standby voltage reducing device is connected and then the original voltage reducing device is taken out, and at this time, the fault alarm signal output relay acts and sends out the alarm signal; and the DC voltage reduction open circuit protector ensures the control bus does not lose power and a DC power supply system works safely and reliably.
Description
Technical field
The utility model relates to the open circuit protector, particularly a kind of protector of reduction voltage loop open circuit.
Background technology
The operating power of 220kV and above transformer station adopts DC power system by state's net requirement; DC power system is the heart of transformer station; if the open circuit of the reduction voltage loop in the DC power system (broken string); with the loss of voltage that causes on the control bus; be connected on relaying protection, automatics dead electricity on the control bus, can't send the emergency stop valve trip instruction and make the primary cut-out tripping operation, can't excise fault; accident is enlarged, cause very serious harm.
When dropping equipment or step-down automatic controller need artificial maintenance, also to avoid closing bus bar and control bus to open a way.
Therefore need a kind of device to prevent the harm that the reduction voltage loop open circuit is brought in the DC power system.
The utility model content
In view of this, the purpose of this utility model provides a kind of DC decompression loop open-circuit protector.
The purpose of this utility model is achieved through the following technical solutions:
Described DC decompression loop open-circuit protector comprises standby dropping equipment 3, electronic switch 1 and triggering decision circuitry 2; Described electronic switch 1 one ends are connected with standby dropping equipment 3 negative pole ends, the positive pole of this standby dropping equipment 3 is connected on the input port DK1, the other end of electronic switch 1 is connected on the output port DK2, described input port DK1 is used to connect the input of closing bus bar+wo, output port DK2 is used to connect the output of control bus+wc, dropping equipment 6 is connected between control bus wc and the closing bus bar wo, described triggering decision circuitry 2 is connected between output port DK2 and the input port DK1, and described triggering decision circuitry 2 links to each other with electronic switch 1, and control electronic switch 1.
Further, described triggering decision circuitry 2 connects fault alarm signal output relay 5.
Further, described electronic switch 1 two ends are connected with hand switch 4, and this hand switch 4 is as hand-reset and manual control electronic switch 1.
The beneficial effects of the utility model: the utility model provides DC decompression loop open-circuit protector, when the dropping equipment open circuit, when making closing bus bar become big with the voltage difference of controlling bus, trigger decision circuitry and send triggering signal, make the electronic switch momentary connection, standby dropping equipment is connected, guarantee not dead electricity of control bus, alarm signal is sent in the adhesive of simultaneous faults alarm signal output relay; When safeguarding dropping equipment if desired, the switch of the protector that manually closes is earlier connected standby dropping equipment, and then is taken out the dropping equipment of former fault, and alarm signal is sent in fault alarm signal output relay action at this moment; Can guarantee to control not dead electricity of bus, ensure the DC power system safe and reliable operation.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Accompanying drawing is a DC decompression loop open-circuit protector schematic diagram.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection range of the present utility model.
As shown in drawings, described DC decompression loop open-circuit protector comprises standby dropping equipment 3, electronic switch 1 and triggering decision circuitry 2; Described electronic switch 1 one ends are connected with standby dropping equipment 3 negative pole ends, the positive pole of this standby dropping equipment 3 is connected on the input port DK1, the other end of electronic switch 1 is connected on the output port DK2, described input port DK1 is used to connect the input of closing bus bar wo, output port DK2 is used to connect the output of control bus wc, dropping equipment 6 is connected between control bus wc and the closing bus bar wo, described triggering decision circuitry 2 is connected between output port DK2 and the input port DK1, and described triggering decision circuitry 2 links to each other with electronic switch 1, and control electronic switch 1.
Described triggering decision circuitry 2 connects fault-signal alarm output relay 5.
When dropping equipment 6 operate as normal, the triggering decision circuitry 2 of DC decompression loop open-circuit protector is measured the voltage at dropping equipment 6 two ends all the time, is failure to actuate as long as the voltage at dropping equipment 6 two ends in 35V, triggers decision circuitry 2; When dropping equipment 6 open circuit, the voltage difference that makes closing bus bar and control bus triggers decision circuitry 2 and sends triggering signal during greater than 35V+12V, electronic switch 1 momentary connection, guarantee not dead electricity of control bus, alarm signal is sent in 5 adhesives of simultaneous faults alarm signal output relay.
When safeguarding dropping equipment 6 if desired, the hand switch 4 of the protector that manually closes is earlier connected the branch road at standby dropping equipment 3 places; and then taking-up dropping equipment 6; at this moment fault alarm signal output relay 5 actions are sent alarm signal, call user's attention.
Described electronic switch 1 two ends are connected with hand switch 4; these hand switch 4 control electronic switches 1; the hand switch 4 of DC decompression loop open-circuit protector; it also is the reset switch of DC decompression loop open-circuit protector; after the electronic switch 1 of DC decompression loop open-circuit protector is connected, have only by hand switch 4 just can reset, with 4 dozens of positions of connecting of hand switch; and then disconnect, the branch road at standby dropping equipment 3 places could disconnect.If it is normal that dropping equipment 6 does not recover, hand switch 4 is inoperative, guarantees not dead electricity of control bus.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. a DC decompression loop open-circuit protector comprises standby dropping equipment (3), it is characterized in that: also include electronic switch (1) and trigger decision circuitry (2); Described electronic switch (1) one end is connected with standby dropping equipment (3) negative pole end, the positive terminal of this standby dropping equipment (3) is connected on the input port (DK1), the other end of electronic switch (1) is connected on the output port (DK2), described input port (DK1) is used to connect closing bus bar (+wo) input, output port (DK2) is used for connecting control bus (+wc) output, described triggering decision circuitry (2) is connected between input port (DK1) and the output port (DK2), and described triggering decision circuitry (2) links to each other with electronic switch (1), and control electronic switch (1).
2. DC decompression according to claim 1 loop open-circuit protector is characterized in that: described triggering decision circuitry (2) connects fault alarm signal output relay (5).
3. DC decompression according to claim 1 loop open-circuit protector is characterized in that: described electronic switch (1) two ends are connected with hand switch (4), and this hand switch (4) is as hand-reset and manual control electronic switch (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202523646U CN201726120U (en) | 2010-07-09 | 2010-07-09 | DC voltage reduction open circuit protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202523646U CN201726120U (en) | 2010-07-09 | 2010-07-09 | DC voltage reduction open circuit protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726120U true CN201726120U (en) | 2011-01-26 |
Family
ID=43494473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202523646U Expired - Fee Related CN201726120U (en) | 2010-07-09 | 2010-07-09 | DC voltage reduction open circuit protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726120U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891530A (en) * | 2012-10-22 | 2013-01-23 | 四川省电力公司广元电业局 | Control bus voltage loss prevention device |
| CN113447705A (en) * | 2021-06-21 | 2021-09-28 | 深圳供电局有限公司 | Device and method for keeping secondary neutral point of voltage transformer grounded |
-
2010
- 2010-07-09 CN CN2010202523646U patent/CN201726120U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891530A (en) * | 2012-10-22 | 2013-01-23 | 四川省电力公司广元电业局 | Control bus voltage loss prevention device |
| CN113447705A (en) * | 2021-06-21 | 2021-09-28 | 深圳供电局有限公司 | Device and method for keeping secondary neutral point of voltage transformer grounded |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20130709 |