CN106130014A - A kind of anti-error power-supply system based on high resistance grounding - Google Patents
A kind of anti-error power-supply system based on high resistance grounding Download PDFInfo
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- CN106130014A CN106130014A CN201610566668.1A CN201610566668A CN106130014A CN 106130014 A CN106130014 A CN 106130014A CN 201610566668 A CN201610566668 A CN 201610566668A CN 106130014 A CN106130014 A CN 106130014A
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- resistance
- ground connection
- error power
- supply system
- high resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- 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
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a kind of anti-error power-supply system based on high resistance grounding, including isolating transformer and anti-error power supply, also include the high resistance grounding device being connected with fire wire output end and ground line output terminal, comprising: ground connection switching pressing plate, first end is connected with ground line output terminal, second end is connected with fire wire output end, and the first end of the 3rd end and the first end of the first resistance and the second resistance connects.Second end of the first resistance and the first end of the 4th resistance connect, and the second end of the second resistance and the first end of the 3rd resistance connect, the second end of the second resistance and the second end ground connection of the 4th resistance.When certain end point ground connection in live wire, then the earth point at the second end place of the second end of the second resistance and the 4th resistance will produce abnormal signal.When no ground, can conveniently realize the trouble shooting of anti-error power-supply system, and ensure to be limited in the current potential of anti-error power-supply system normal scope, thus ensure that the safety in the operation detection carrying out anti-error power-supply system.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of anti-error power-supply system based on high resistance grounding.
Background technology
When primary equipment in transformer station operates, in order to ensure the safety of the person, equipment, it is necessary to meet " five prevent " and require:
The most anti-error point, conjunction chopper, anti-on-load drawing isolation switch, anti-charged co-grounding switch, anti-line with ground closes chopper, anti-
Mistakenly entering charged chamber.The anti-error power-supply system of tradition transformer station, typically by electromagnetic lock, electrification display and various auxiliary contact group
Become, shown in connection principle Fig. 1.Fig. 1 is the circuit diagram of the anti-error power-supply system that prior art uses.Preventing of this anti-error power-supply system
Power supply typically uses the earth-free 220V power supply through isolating transformer, as shown in Fig. 1 left-half by mistake.
The anti-error power-supply system of tradition is by ground connection 220V alternating current power supply, 220V/220V isolating transformer 10, anti-error power supply
FWA1-FWN1, FWA2-FWN2, FWA3-FWN3, FWA4-FWN5 and corresponding fuse (sky is opened) composition.Fig. 2 is prior art
Middle transformer station 110kV inlet wire and main transformer high-pressure side anti-misoperation partial circuit diagram.Anti-error power supply is shape after isolating transformer is isolated
Becoming isolated neutral system, its main purpose is to prevent short circuit after outdoor equipment ground connection, even results in opening by mistake of anti-misoperation locking and puts.Through every
After transformator, anti-error power supply can be isolated with the AC system of transformer station, thus ensures the independent reliable of anti-error loop.
The problem that the earth-free anti-error power-supply system of tradition exists includes:
Firstly it is difficult to outdoor equipment node is checked: earth-free anti-error power-supply system does not has ground connection reference point, therefore
FWN or FWA of reference is needed when checking anti-error loop.But owing to lacking FWN or FWA, it is difficult to check G1, G3 institute in Fig. 2
The outdoor equipment contact shown is the most normal.
Secondly, switching electronic loop is fragile: the above earth potential of earth-free anti-error power-supply system depends on anti-error loop
The factors such as direct-to-ground capacitance, therefore its above earth potential may be significantly larger than 220V.Fig. 3 is that in prior art, 10kV Capacitor banks is anti-error
The circuit diagram of operation locked loop.Wherein chopper there is fin in the electronic type rectifier bridge Qo-Yo of operating mechanism locking
Ground connection, the suspension high-potential of anti-error power supply is easily by the soft breakdown over the ground of Qo-Yo rectifier bridge.
Finally, it is impossible to by one or more ground connection of equipment Inspection: traditional anti-error power-supply system occurs one or more to connect
During ground, it is impossible to by equipment Inspection, and will the exception in anti-error loop be caused when or multipoint earthing at 2.
In sum, earth-free anti-error power-supply system in prior art, when carrying out associative operation, owing to detecting
Whether with the presence of ground signalling in system, cause the safety that cannot ensure operating process.
As can be seen here, how realizing the detection of the ground signalling to anti-error power-supply system is that those skilled in the art are urgently to be resolved hurrily
Ground problem.
Summary of the invention
It is an object of the invention to provide a kind of anti-error power-supply system based on high resistance grounding, for realizing anti-error power supply
The inspection of system and prevent the damage of electronic component.
For solve above-mentioned technical problem, the present invention provides a kind of anti-error power-supply system based on high resistance grounding, including with
The isolating transformer that power supply connects, the anti-error power supply being connected with the fire wire output end of described isolating transformer and ground line output terminal,
Also include the high resistance grounding device being connected with described fire wire output end and described ground line output terminal；
Described high resistance grounding device includes: ground connection switching pressing plate, described ground connection switching pressing plate the first end with describedly
Line output terminal connects, and the second end of described ground connection switching pressing plate is connected with described fire wire output end, described ground connection switching pressing plate
First end of the 3rd end and the first end of the first resistance and the second resistance connects, the second end of described first resistance and the 4th resistance
The first end connect, the first end connection of the second end of described second resistance and the 3rd resistance, the second end of described second resistance
The second end ground connection with described 4th resistance.
Preferably, also including the first fuse and the second fuse, the first end of described ground connection switching pressing plate is by described first
Fuse is connected with described ground line output terminal, and the second end of described ground connection switching pressing plate is defeated with described live wire by described second fuse
Go out end to connect.
Preferably, ground connection alarm relay and alarm device, the second end of described second resistance and the described 4th are also included
Second end of the resistance coil ground connection by described ground connection alarm relay, described alarm device and described ground connection alarm relay
Switch connect, described switch Guan Bi in the case of alarm prompt.
Preferably, described ground connection alarm relay is alternating voltage relay.
Preferably, described alarm device includes that buzzer is connected in the case of described switch Guan Bi.
Preferably, described alarm device also includes that flash lamp is connected in the case of described switch Guan Bi.
Anti-error power-supply system based on high resistance grounding provided by the present invention, including high resistance grounding device, normally transports
During row, ground connection is switched pressing plate and switches in ground line side, by ground wire through high resistance (first resistance the-the four resistance) ground connection.When in live wire
Certain end point ground connection time, then the earth point at the second end place of the second end of the second resistance and the 4th resistance will produce exception
Signal.When no ground, can conveniently realize the trouble shooting of anti-error power-supply system, and ensure the current potential of anti-error power-supply system
It is limited in normal scope.When needs anti-misoperation, ground connection is switched pressing plate and switches in hot side whether to check ground line side
There is a ground signalling, then ground connection is switched pressing plate switch in hot side, after checking no ground signal, carry out the behaviour of anti-error power-supply system
Conduct a survey, thus ensure that the safety in the operation detection carrying out anti-error power-supply system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention, the accompanying drawing used required in embodiment will be done simply below
Introduce, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ordinary skill people
From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of the anti-error power-supply system that prior art uses；
Fig. 2 is transformer station 110kV inlet wire and main transformer high-pressure side anti-misoperation partial circuit diagram in prior art；
Fig. 3 is the circuit diagram in 10kV Capacitor banks anti-incorrect manipulation deadlock loop in prior art；
The circuit diagram of a kind of based on high resistance grounding the anti-error power-supply system that Fig. 4 provides for the present invention；
The circuit diagram of the another kind anti-error power-supply system based on high resistance grounding that Fig. 5 provides for the present invention；
A kind of actual application circuit of high resistance grounding device that Fig. 6 provides for the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiment wholely.Based on this
Embodiment in invention, those of ordinary skill in the art are not under making creative work premise, and obtained is every other
Embodiment, broadly falls into scope.
The core of the present invention is to provide a kind of anti-error power-supply system based on high resistance grounding.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings and detailed description of the invention
The present invention is described in further detail.
The circuit diagram of a kind of based on high resistance grounding the anti-error power-supply system that Fig. 4 provides for the present invention.As shown in Figure 4,
Anti-error power-supply system based on high resistance grounding includes the isolating transformer 10 being connected with power supply, with the live wire of isolating transformer 10
The anti-error power supply FWA1-FWN1 that outfan FWA and ground line output terminal FWN connects, FWA2-FWN2, FWA3-FWN3, FWA4-
FWN5.Also include the high resistance grounding device 11 being connected with fire wire output end FWA and ground line output terminal FWN；
High resistance grounding device 11 includes: ground connection switching pressing plate QP, and first end of ground connection switching pressing plate QP exports with ground wire
End FWN connect, ground connection switching pressing plate QP the second end is connected with fire wire output end FWA, ground connection switch pressing plate QP the 3rd end and
First end of first end of the first resistance R1 and the second resistance R2 connects, the of second end of the first resistance R1 and the 4th resistance R4
One end connects, and second end of the second resistance R2 and first end of the 3rd resistance R3 connect, second end and the 4th of the second resistance R2
The second end ground connection of resistance R4.
In being embodied as, in anti-error power supply FWA1-FWN1, the loop of FWA2-FWN2, FWA3-FWN3, FWA4-FWN5
On arrange the present invention provide high resistance grounding device 11.
The circuit diagram of the another kind anti-error power-supply system based on high resistance grounding that Fig. 5 provides for the present invention.Such as Fig. 5 institute
Show, also include the first fuse F1 and the second fuse F2,
First end of ground connection switching pressing plate QP is connected with ground line output terminal FWN by the first fuse F1, ground connection switching pressing plate
Second end of QP is connected with fire wire output end FWA by the second fuse F2.
On the basis of above-described embodiment, also include ground connection alarm relay J1 and alarm device 12, the second resistance R2's
Second end of the second end and the 4th resistance R4 coil ground connection by ground connection alarm relay J1, alarm device 12 alerts with ground connection
The switch K1 of relay J 1 connects, alarm prompt in the case of switch K1 Guan Bi.
In being embodied as, alarm device 12 includes that buzzer is connected in the case of switch Guan Bi.Real at another
Executing in example, alarm device 12 also includes that flash lamp is connected in the case of switch Guan Bi.
It is understood that the selection mode of alarm device 12 has a variety of, as long as can be in the situation of switch K1 Guan Bi
Under, alarm prompt is the most permissible, it is not limited to above two embodiment.
Choose hereinafter to the parameter of the high resistance grounding device 11 of above-mentioned offer and elaborate.Connect based on high resistance
In the anti-error power-supply system on ground, needing to select earth resistance, selection principle is:
1, the loop that earth resistance and Abnormal Grounding point are formed should not result in anti-error partial failure.
2, the longtime running requirement under the power passed through in earth resistance should meet full voltage, and when anti-error electric power loop
During middle any point ground connection, this resistance will not damage.
3, high resistance grounding device is when certain end point ground connection, forms loop when high resistance grounding device is too small with FWN,
Cause the DSD electromagnetic lock on loop to open by mistake to put, when selecting earth resistance, it is necessary to prevent anti-error loop any point ground connection from causing
Open by mistake and put.
A kind of actual application circuit of high resistance grounding device that Fig. 6 provides for the present invention.As shown in Figure 6, high resistance is worked as
The grounding device 11 situation when 891 end points ground connection:
1 select grounding resistance resistance on principle: each branch road in anti-error loop typically has a resistance to be 2k Ω
Electromagnetic lock DSD, it is minimum may be calculated by 20% rated voltage by operation voltage.After meter and margin requirement, by electromagnetic lock DSD's
Minimum possible operation voltage be limited in the level less than 10% rated voltage, it should is can reliably to prevent the malfunction of electromagnetic lock from opening
Put, thus resistance R1-R4 series connection and parallel connection after all-in resistance RE be:
When earth resistance RE and electromagnetic lock DSD connects the anti-error power-supply system of access, earth resistance resistance is 20k Ω-2k
Ω=18k Ω.For ensureing reliability, actual value elects 20k Ω as.
Owing to RE is to connect after two parallel connections of R1-R4 resistance again, so identical when R1-R4 resistance according to Ohm's law
Time, RE resistance is single resistance, but power is 4 times of single resistance.
2 performance number selecting earth resistances on principle: the connecing of earth resistance RE and alternating current die mould in extreme circumstances
Ground detection relay bears the full voltage of anti-error power supply, then the power calculating earth resistance RE and ground connection alarm relay J1 is:
The capacity of RE is 4 times of (R1-R4) single resistance capacity, and so conversion is to the merit of each 20k Ω resistance (R1-R4)
Rate is 0.5W, it is considered to nargin backsight is 1W, then the power of ground connection alarm relay J1 is: PRelay=202/ (2k Ω)=0.2W.
In view of the gap of theoretical value Yu actual value, in being embodied as, the power selecting ground connection alarm relay J1 is big
In 1W.
The selection of ground connection alarm relay operation voltage
In being embodied as, ground connection alarm relay J1 uses alternating voltage relay, it is assumed that ground connection alarm relay J1
Impedance be 2k Ω, operation voltage scope is 5～20V, under extreme case when FWA or FWN metallic earthing as shown in Figure 6
RE and grounding relay J1 bears anti-error power supply full voltage, and the partial pressure value of ground connection alarm relay J1 is:
So the alternating voltage relay that ground connection alarm relay J1 selects rated voltage to be 48V；
When earth resistance Re is 20k Ω, all-in resistance is 20k Ω+22k=42k Ω, then on ground connection alarm relay J1
Dividing potential drop is:
In sum, for ensureing sensitivity, typically adjust as 10V, can when the earth resistance ground connection less than 20k Ω
By alarm.
The high resistance grounding device using priciple that the present invention provides is:
Time properly functioning, QP is switched in ACN side, by FWN through high resistance (R1-R4) ground connection, when having FWA through less than 20k Ω
During ground resistance earth, may result in alarm relay J1 action output alarm signal.
Time no ground, can conveniently realize the fault detect in anti-error loop, and ensure to be limited in the current potential in anti-error loop
Normal scope.When needs anti-misoperation, QP is switched in ACA and has detected whether FWN ground connection, then QP is switched in ACN, inspection
After surveying no ground signal, carry out the operation detection in anti-error loop.
Based on high resistance grounding the anti-error power-supply system that the present invention provides, including high resistance grounding device, properly functioning
Time ground connection switched pressing plate switch in ground line side, by ground wire through high resistance (first resistance the-the four resistance) ground connection.When in live wire
During certain end point ground connection, then the earth point at the second end place of the second end of the second resistance and the 4th resistance will produce abnormal letter
Number.When no ground, can conveniently realize the trouble shooting of anti-error power-supply system, and ensure to limit the current potential of anti-error power-supply system
System is in normal scope.When needs anti-misoperation, ground connection is switched pressing plate and switches in hot side to check whether ground line side has
Ground signalling, then ground connection is switched pressing plate switch in hot side, after checking no ground signal, carry out the operation of anti-error power-supply system
Check, thus ensure that the safety in the operation detection carrying out anti-error power-supply system.
Above anti-error power-supply system based on high resistance grounding provided by the present invention is described in detail.Description
In each embodiment use the mode gone forward one by one to describe, what each embodiment stressed is different from other embodiments it
Place, between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment, owing to it is with real
Executing method disclosed in example corresponding, so describe is fairly simple, relevant part sees method part and illustrates.Should refer to
Go out, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention
Carrying out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Professional further appreciates that, in conjunction with the unit of each example that the embodiments described herein describes
And algorithm steps, it is possible to electronic hardware, computer software or the two be implemented in combination in, in order to clearly demonstrate hardware and
The interchangeability of software, the most generally describes composition and the step of each example according to function.These
Function performs with hardware or software mode actually, depends on application-specific and the design constraint of technical scheme.Specialty
Technical staff specifically should can be used for using different methods to realize described function to each, but this realization should not
Think beyond the scope of this invention.
The method described in conjunction with the embodiments described herein or the step of algorithm can direct hardware, processor be held
The software module of row, or the combination of the two implements.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, depositor, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Claims (6)
1. an anti-error power-supply system based on high resistance grounding, including the isolating transformer being connected with power supply, with described isolation
The anti-error power supply that the fire wire output end of transformator and ground line output terminal connect, it is characterised in that also include exporting with described live wire
The high resistance grounding device that end and described ground line output terminal connect；
Described high resistance grounding device includes: ground connection switching pressing plate, and the first end of described ground connection switching pressing plate is defeated with described ground wire
Going out end to connect, the second end of described ground connection switching pressing plate is connected with described fire wire output end, the 3rd of described ground connection switching pressing plate
End is connected with the first end of the first resistance and the first end of the second resistance, the of the second end of described first resistance and the 4th resistance
One end connects, and the second end of described second resistance and the first end of the 3rd resistance connect, the second end of described second resistance and institute
State the second end ground connection of the 4th resistance.
Anti-error power-supply system based on high resistance grounding the most according to claim 1, it is characterised in that also include that first melts
Silk and the second fuse,
First end of described ground connection switching pressing plate is connected with described ground line output terminal by described first fuse, and described ground connection switches
Second end of pressing plate is connected with described fire wire output end by described second fuse.
Anti-error power-supply system based on high resistance grounding the most according to claim 1 and 2, it is characterised in that also include connecing
Ground alarm relay and alarm device, the second end of described second resistance and the second end of described 4th resistance are by described ground connection
The coil ground connection of alarm relay, described alarm device is connected with the switch of described ground connection alarm relay, closes at described switch
Alarm prompt in the case of conjunction.
Anti-error power-supply system based on high resistance grounding the most according to claim 3, it is characterised in that described ground connection alerts
Relay is alternating voltage relay.
Anti-error power-supply system based on high resistance grounding the most according to claim 3, it is characterised in that described alarm device
Connect in the case of described switch Guan Bi including buzzer.
Anti-error power-supply system based on high resistance grounding the most according to claim 4, it is characterised in that described alarm device
Also include that flash lamp is connected in the case of described switch Guan Bi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566668.1A CN106130014A (en) | 2016-07-15 | 2016-07-15 | A kind of anti-error power-supply system based on high resistance grounding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566668.1A CN106130014A (en) | 2016-07-15 | 2016-07-15 | A kind of anti-error power-supply system based on high resistance grounding |
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| CN106130014A true CN106130014A (en) | 2016-11-16 |
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| CN201610566668.1A Pending CN106130014A (en) | 2016-07-15 | 2016-07-15 | A kind of anti-error power-supply system based on high resistance grounding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799393A (en) * | 2018-12-29 | 2019-05-24 | 王翰凌 | Earth resistance tester for home circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053129A (en) * | 1990-01-06 | 1991-07-17 | 吴湘汉 | Detect the method and the device of ground current |
| CN201066780Y (en) * | 2007-07-12 | 2008-05-28 | 朱开久 | A field secure power device |
| US8058745B2 (en) * | 2008-12-16 | 2011-11-15 | General Electric Company | Systems and methods providing a power converter |
| CN202940561U (en) * | 2012-10-25 | 2013-05-15 | 朱开久 | Dedicated explosion-proof power supply device for field operation |
| CN104158146A (en) * | 2014-07-31 | 2014-11-19 | 康力电梯股份有限公司 | Short-to-ground protection device for safety circuit |
| CN205829171U (en) * | 2016-07-15 | 2016-12-21 | 国网浙江省电力公司杭州供电公司 | A kind of anti-error power-supply system based on high resistance grounding |
-
2016
- 2016-07-15 CN CN201610566668.1A patent/CN106130014A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053129A (en) * | 1990-01-06 | 1991-07-17 | 吴湘汉 | Detect the method and the device of ground current |
| CN201066780Y (en) * | 2007-07-12 | 2008-05-28 | 朱开久 | A field secure power device |
| US8058745B2 (en) * | 2008-12-16 | 2011-11-15 | General Electric Company | Systems and methods providing a power converter |
| CN202940561U (en) * | 2012-10-25 | 2013-05-15 | 朱开久 | Dedicated explosion-proof power supply device for field operation |
| CN104158146A (en) * | 2014-07-31 | 2014-11-19 | 康力电梯股份有限公司 | Short-to-ground protection device for safety circuit |
| CN205829171U (en) * | 2016-07-15 | 2016-12-21 | 国网浙江省电力公司杭州供电公司 | A kind of anti-error power-supply system based on high resistance grounding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799393A (en) * | 2018-12-29 | 2019-05-24 | 王翰凌 | Earth resistance tester for home circuit |
| CN109799393B (en) * | 2018-12-29 | 2024-03-12 | 王翰凌 | Ground resistance tester for household circuit |
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