CN109270397A - A kind of direct-current grounding monitoring device - Google Patents
A kind of direct-current grounding monitoring device Download PDFInfo
- Publication number
- CN109270397A CN109270397A CN201811419532.3A CN201811419532A CN109270397A CN 109270397 A CN109270397 A CN 109270397A CN 201811419532 A CN201811419532 A CN 201811419532A CN 109270397 A CN109270397 A CN 109270397A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 2
- 238000011835 investigation Methods 0.000 abstract description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Alarm Devices (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a kind of direct-current grounding monitoring devices comprising: the first circuit, second servo loop and monitoring modular, the first circuit include primary equipment module, secondary device module and first line；Second servo loop includes warning device and the second route, and the second route is normally opened track circuit；Monitoring modular controls the second route closure when monitoring that DC earthing occurs in the first circuit for monitoring whether the first circuit occurs DC earthing.By whether DC earthing occurring in the first line between setting monitoring module monitors primary equipment module and secondary device module, and the warning device of corresponding first line is set, alert is triggered when DC earthing occurs, allow staff's quicklook knows that DC earthing occurs in which circuit, so as to greatly reduce the investigation time of DC earthing, ensure that grid equipment arranges stable operation.
Description
Technical field
The present invention relates to route survey technical field more particularly to a kind of direct-current grounding monitoring devices.
Background technique
The substation that newly puts into operation in recent years is increasing, and after equipment runs many years, cable insulation is generally reduced, various terminals
Case, mechanism case, knife switch secondary contact case etc. get rusty damage, and leakproofness decline is met thunderstorm, snow, wet fog weather, easily connect
Ground.When automation equipment secondary circuit is grounded, it is possible to cause automation equipment signal device, relay protection and automatic
Device, the malfunction of breaker or miss operation, it is possible to cause DC power supply short-circuit, cause fuse blows, or fast point of electricity
Source switch disconnects, and equipment is made to lose operation power, causes electric system catastrophe failure or even accident.Therefore, transforming plant DC connects
Earth fault, it is not only unfavorable to equipment, but also constitute a threat to the safety of entire electric system, it should try to exclude immediately.But
In live actual mechanical process, since DC ground fault type is more, lookup is complex, and time-consuming, has seriously affected and has set
Standby safe and stable operation.
Summary of the invention
The present invention provides a kind of direct-current grounding monitoring devices, it is intended to shorten DC earthing and exclude the time, ensure that power grid is set
It is standby to arrange stable operation.
The present invention provides a kind of direct-current grounding monitoring devices comprising:
First circuit, first circuit include primary equipment module, secondary device module and for being electrically connected
State the first line of primary equipment module and the secondary device module；
Second servo loop, the second servo loop include warning device and described for the warning device to be electrically connected to
Second route in the first circuit, second route are normally opened track circuit；
Monitoring modular, the monitoring modular are being monitored for monitoring whether first circuit occurs DC earthing
First circuit occurs controlling the second route closure when DC earthing.
Further, the monitoring modular includes the electrical resistance monitoring device being serially connected on first circuit, and concatenation
Normal open switch on the second line are each.
Further, the electrical resistance monitoring device is sense resistance, the normal open switch and the sense resistance electrical property phase
Even, the monitoring modular controls the normal open switch closure when the resistance value of the sense resistance is more than preset threshold.
Further, the primary equipment module includes the first contact of multiple groups in parallel, and the primary equipment module passes through
First contact is connected with the first line.
Further, the secondary device module includes multiple groups the second contact corresponding with first contact, and
Multiple groups third contact corresponding with the monitoring modular, it is corresponding with the third contact that the warning device is equipped with multiple groups
The 4th contact, second connection is between the third contact and the 4th contact.
Further, first circuit includes a plurality of between the multiple first contact and the multiple second contact
First sub-loop is equipped with the electrical resistance monitoring device in every first sub-loop.
Further, it is equipped with and first sub-loop pair between multiple third contacts and the multiple 4th contact
The second sub-loop answered, second sub-loop is in parallel with the electrical resistance monitoring device, is all provided in every second sub-loop
There is the normal open switch.
Further, the warning device includes the alarm of corresponding each second sub-loop.
The embodiment of the present invention passes through first between setting monitoring module monitors primary equipment module and secondary device module
DC earthing whether occurs on route, and the warning device of corresponding first line is set, triggers and issues when DC earthing occurs
Warning message, allow staff's quicklook knows that DC earthing occurs in which circuit, straight so as to greatly reduce
The investigation time of ground connection is flowed, ensures that grid equipment arranges stable operation.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of module diagram of direct-current grounding monitoring device provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of direct-current grounding monitoring device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this description of the invention merely for the sake of description specific embodiment
And be not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in description of the invention and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is a kind of module signal of direct-current grounding monitoring device provided in an embodiment of the present invention
Figure, Fig. 2 is a kind of structural schematic diagram of direct-current grounding monitoring device provided in an embodiment of the present invention, the direct-current grounding monitoring device
Including the first circuit, second servo loop and monitoring modular 300, the first circuit includes primary equipment module 100, secondary device module
200 and the first line for being electrically connected primary equipment module 100 and secondary device module 200；Second servo loop includes report
Alarm device 400 and the second route for warning device 400 to be electrically connected to the first circuit, the second route are normally opened line
Road；Monitoring modular 300 is monitoring that DC earthing occurs in the first circuit for monitoring whether the first circuit occurs DC earthing
When control the second route closure.
Specifically, the first circuit is primary equipment module 100, secondary device module 200 and primary for being electrically connected
The complete loops that the first line of EM equipment module 100 and secondary device module 200 is formed, first line are primary equipment module
The first outside line between 100 contact and the contact of secondary device module 200 and be set to primary equipment module 100 and
For connecting the first inside cabling of each contact, the first outside cabling contact as shown in Figure 2 in secondary device module 200
Cabling between 1 and contact 11 and contact 2 and contact 12, the first inside cabling are not shown in the figure.Second servo loop includes alarm
Device 400 and the second route for warning device 400 to be electrically connected to the first circuit, the second route include being set to two
Outside the second inside cabling in secondary device module 200 and second between secondary device module 200 and warning device 400
Portion's cabling, the second outside cabling contact 27 as shown in Figure 2 and contact 28, contact 26 and contact 29 and contact 13 and first
Route between external cabling.Second route is in normally open under normal conditions, can open for example shown in Fig. 2 equipped with normally opened
S1 is closed, when DC earthing does not occur for the first circuit, S1 is in the open state, once monitoring modular 300 monitors DC earthing,
Normal open switch S1 closure, which can then be triggered, allows second servo loop to be connected, to trigger warning device 400.
Specifically, it is monitored between primary equipment module 100 and secondary device module 200 by setting monitoring modular 300
DC earthing whether occurs in first line, and the warning device 400 of corresponding first line is set, is touched when DC earthing occurs
Alert is sent out, allow staff's quicklook knows that DC earthing occurs in which circuit, so as to significantly
The investigation time of DC earthing is reduced, ensures that grid equipment arranges stable operation.
In one embodiment, monitoring modular 300 includes the electrical resistance monitoring device being serially connected on the first circuit, and is serially connected in
Normal open switch on second route.
In one embodiment, electrical resistance monitoring device is sense resistance, and normal open switch is electrical connected with sense resistance, monitors mould
Block control normal open switch closure when the resistance value of sense resistance is more than preset threshold.
Specifically, it connects in route sense resistance, because resistance will increase when DC earthing occurs, when being grounded
When, the resistance value of sense resistance increases, when increasing to preset threshold value, be closed normal open switch, normal open switch can be with
The independent switch of sense resistance parallel connection, is also possible to be set to the interior switch in parallel inside sense resistance, and normal open switch closes
Second servo loop is connected after conjunction, to trigger the alarm of warning device 400.
In one embodiment, primary equipment module 100 includes the first contact of multiple groups in parallel, and primary equipment module 100 is logical
The first contact is crossed to be connected with first line.
In one embodiment, secondary device module 200 includes multiple groups the second contact corresponding with the first contact, Yi Jiduo
Group third contact corresponding with monitoring modular 300, warning device are equipped with multiple groups and the third contact the corresponding 4th
Contact, second connection is between the third contact and the 4th contact.
Specifically, the first contact contact 1~10 as shown in Figure 2, wherein contact 1 and 2 is that one group of first contact belongs to
In a sub-loop, contact 3 and 4 is one group of first contact, in parallel with the circuit that contact 1 and 2 is formed, and so on, contact 5
With the first contact that 6,7 and 8,9 and 10 are respectively in other sub-loops parallel with one another, with first in secondary device module 200
Contact it is opposite have the second contact, the second contact contact 11,12,14,16,18,20 as shown in Figure 2, contact 12,14,16,
18, parallel with one another between 20, pass through contact 11 respectively and corresponding first contact forms complete first circuit, such as connects
--- --- contact 12 --- contact 2 --- contact 1 is equipped with electrical resistance monitoring device to contact 11 to point 1 between contact 2 and contact 12
R1, it is parallel with one another between remaining multiple sub-loop.
In one embodiment, the first circuit includes that a plurality of first son between multiple first contacts and multiple second contacts returns
Road is equipped with electrical resistance monitoring device in every first sub-loop.
In one embodiment, corresponding with the first sub-loop second is equipped between multiple third contacts and multiple 4th contacts
Sub-loop, the second sub-loop is in parallel with electrical resistance monitoring device, is equipped with normal open switch in every second sub-loop.
In one embodiment, warning device includes the alarm of corresponding each second sub-loop.
Specifically, electrical resistance monitoring device, electrical resistance monitoring device R1 as shown in Figure 2 are equipped in every first sub-loop
~R5, and be corresponding to it and be equipped with normal open switch S1~S5 and alarm M1~M5 in every second sub-loop, the second son returns
It road can self-resistance monitoring device R1 --- normal open switch the S1 --- --- contact 26 --- contact 29 --- of contact 13 in such as Fig. 2
--- --- contact 27 --- contact 12 --- electrical resistance monitoring device R1, the second cabling includes internal cabling to contact 28 to alarm M1
It is identical as above-mentioned first trace portions with external cabling, it is not repeated herein.It is parallel with one another between each second sub-loop, each
Alarm corresponds to second sub-loop, that is, corresponds to first sub-loop, so that first sub-loop occurs directly wherein
Triggering alarm is alarmed when stream ground connection, and staff is allowed fast and accurately to find fault point, improves maintenance efficiency.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (8)
1. a kind of direct-current grounding monitoring device characterized by comprising
First circuit, first circuit include primary equipment module, secondary device module and for being electrically connected described one
The first line of secondary device module and the secondary device module；
Second servo loop, the second servo loop include warning device and for the warning device to be electrically connected to described first
Second route in circuit, second route are normally opened track circuit；
Whether monitoring modular, the monitoring modular occur DC earthing for monitoring first circuit, and monitor it is described
First circuit occurs controlling the second route closure when DC earthing.
2. direct-current grounding monitoring device according to claim 1, which is characterized in that the monitoring modular includes being serially connected in institute
State the electrical resistance monitoring device on the first circuit, and the normal open switch of concatenation on the second line are each.
3. direct-current grounding monitoring device according to claim 2, which is characterized in that the electrical resistance monitoring device is sensitive electricity
Resistance, the normal open switch are electrical connected with the sense resistance, and the monitoring modular is more than pre- in the resistance value of the sense resistance
If controlling the normal open switch closure when threshold value.
4. direct-current grounding monitoring device according to claim 1, which is characterized in that the primary equipment module includes parallel connection
The first contact of multiple groups, the primary equipment module is connected by first contact with the first line.
5. direct-current grounding monitoring device according to claim 4, which is characterized in that the secondary device module includes multiple groups
The second contact corresponding with first contact and multiple groups third contact corresponding with the monitoring modular, the report
Alarm device is equipped with multiple groups the 4th contact corresponding with the third contact, and second connection is in the third contact
Between the 4th contact.
6. direct-current grounding monitoring device according to claim 2, which is characterized in that first circuit includes the multiple
A plurality of first sub-loop between first contact and the multiple second contact is equipped in every first sub-loop described
Electrical resistance monitoring device.
7. direct-current grounding monitoring device according to claim 6, which is characterized in that multiple third contacts and described more
The second sub-loop corresponding with first sub-loop is equipped between a 4th contact, second sub-loop and the resistance are supervised
It is in parallel to survey device, is equipped with the normal open switch in every second sub-loop.
8. direct-current grounding monitoring device according to claim 7, which is characterized in that the warning device includes corresponding each
The alarm of second sub-loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419532.3A CN109270397B (en) | 2018-11-26 | 2018-11-26 | DC grounding monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419532.3A CN109270397B (en) | 2018-11-26 | 2018-11-26 | DC grounding monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109270397A true CN109270397A (en) | 2019-01-25 |
| CN109270397B CN109270397B (en) | 2024-10-15 |
Family
ID=65190755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811419532.3A Active CN109270397B (en) | 2018-11-26 | 2018-11-26 | DC grounding monitoring device |
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| Country | Link |
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| CN (1) | CN109270397B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06113442A (en) * | 1992-09-29 | 1994-04-22 | Shin Kobe Electric Mach Co Ltd | Ground-fault detection circuit of dc current-feeding circuit |
| US5644293A (en) * | 1995-05-16 | 1997-07-01 | General Signal Corporation | Ground fault detection with location identification |
| CN203894345U (en) * | 2014-04-21 | 2014-10-22 | 深圳供电局有限公司 | Monitoring device for secondary neutral point gap insurance of voltage transformer |
| CN104407265A (en) * | 2014-11-14 | 2015-03-11 | 深圳供电局有限公司 | Method and device for monitoring line defect in bus differential protection current analog quantity of transformer substation |
| CN106443293A (en) * | 2016-08-15 | 2017-02-22 | 国家电网公司 | Direct current ground fault online detection and alarm device |
| CN106646079A (en) * | 2016-11-30 | 2017-05-10 | 国网江苏省电力公司连云港供电公司 | Online direct-current grounding monitoring system for power distribution automation terminal |
| CN207588523U (en) * | 2017-12-25 | 2018-07-06 | 国网安徽省电力有限公司安庆供电公司 | A kind of intelligent charging system of VRLA accumulators |
| JP2018129912A (en) * | 2017-02-07 | 2018-08-16 | 日立化成株式会社 | Method for detecting dc ground fault spot |
| CN209264877U (en) * | 2018-11-26 | 2019-08-16 | 国网安徽省电力有限公司安庆供电公司 | A kind of direct-current grounding monitoring device |
-
2018
- 2018-11-26 CN CN201811419532.3A patent/CN109270397B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06113442A (en) * | 1992-09-29 | 1994-04-22 | Shin Kobe Electric Mach Co Ltd | Ground-fault detection circuit of dc current-feeding circuit |
| US5644293A (en) * | 1995-05-16 | 1997-07-01 | General Signal Corporation | Ground fault detection with location identification |
| CN203894345U (en) * | 2014-04-21 | 2014-10-22 | 深圳供电局有限公司 | Monitoring device for secondary neutral point gap insurance of voltage transformer |
| CN104407265A (en) * | 2014-11-14 | 2015-03-11 | 深圳供电局有限公司 | Method and device for monitoring line defect in bus differential protection current analog quantity of transformer substation |
| CN106443293A (en) * | 2016-08-15 | 2017-02-22 | 国家电网公司 | Direct current ground fault online detection and alarm device |
| CN106646079A (en) * | 2016-11-30 | 2017-05-10 | 国网江苏省电力公司连云港供电公司 | Online direct-current grounding monitoring system for power distribution automation terminal |
| JP2018129912A (en) * | 2017-02-07 | 2018-08-16 | 日立化成株式会社 | Method for detecting dc ground fault spot |
| CN207588523U (en) * | 2017-12-25 | 2018-07-06 | 国网安徽省电力有限公司安庆供电公司 | A kind of intelligent charging system of VRLA accumulators |
| CN209264877U (en) * | 2018-11-26 | 2019-08-16 | 国网安徽省电力有限公司安庆供电公司 | A kind of direct-current grounding monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 钟著辉 等: "直流二次回路异常接地分析及处置", 《国网技术学院学报》, vol. 19, no. 5, 28 October 2016 (2016-10-28), pages 36 - 39 * |
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| Publication number | Publication date |
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| CN109270397B (en) | 2024-10-15 |
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