CN109980623A - Assembling landscape type unit equipment for neutral resistance protection - Google Patents
Assembling landscape type unit equipment for neutral resistance protection Download PDFInfo
- Publication number
- CN109980623A CN109980623A CN201910247742.7A CN201910247742A CN109980623A CN 109980623 A CN109980623 A CN 109980623A CN 201910247742 A CN201910247742 A CN 201910247742A CN 109980623 A CN109980623 A CN 109980623A
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- Prior art keywords
- frame
- unit equipment
- column
- assembling
- neutral
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- 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.)
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 57
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 16
- 239000002023 wood Substances 0.000 claims description 8
- 238000005269 aluminizing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 229960001296 zinc oxide Drugs 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Patch Boards (AREA)
Abstract
The invention discloses a kind of assembling landscape type unit equipments for neutral resistance protection; including the ground resistance apparatus and unit equipment cabinet being connected between neutral point and the earth; the ground resistance apparatus is located in the unit equipment cabinet; and the ground resistance apparatus includes an incoming-line busbar, ground resistance and current transformer; neutral point is sequentially connected to an incoming-line busbar, ground resistance, the primary coil of current transformer and geodetic network, the secondary coil of the current transformer and is connected to protective relaying device.The present invention uses unit equipment cabinet, and each equipment is accommodated wherein, has clean and tidy, beautiful and anti-corrosion effect, while the busbar for connecting inlet wire and unit equipment box house equipment being arranged in unit equipment cabinet, guarantees the stability of conveying electricity.
Description
Technical field
The present invention relates to neutral ground technical fields, and in particular to a kind of assembling for neutral resistance protection
Landscape type unit equipment.
Background technique
Neutral Grounding Method of Power Distribution System usually has isolated neutral, Neutral Grounding through Resistance in Electrical and neutral point through disappearing
Arc coil ground connection.Various earthing modes are different, and usage mode is also different.With the development of national economy, many urban power distribution networks
The situation changed over based on overhead transmission line, but based on cable run, at the same time, some novel devices,
Such as compact-sized closed SF6 switchgear, twisted polyethylene cable and Zinc-Oxide Arrester obtains more and more extensive
Using this allows for the non-effective earthing mode continued to use originally, and some are not applicable.Therefore, how effectively economic setting neutral point
Ground connection becomes the emphasis of current powered operation.
Currently, China has the method for operation that many power network neutral points use resistance grounded.Installation neutral point connects
It after ground resistance cabinet, when non-metal earthing occurs, is influenced by grounding point resistance, flows through the electric current ratio of grounding point and neutral point
There is significant decrease when metallic earthing, meanwhile, perfect phase voltage rising and be significantly reduced, residual voltage value is about single phase metal
The half of ground connection.It can be seen that using Neutral Grounding through Resistance in Electrical, transient overvoltage when can reduce single-phase earthing eliminates arc
Light grounding surge and certain resonance overvoltages, and faulty line can be selected rapidly using simple protective relaying device, it cuts off
Fault point.
Neutral resistance unit equipment is the equipment for being fully exposed to work in atmospheric environment, and it is large-scale to carry protection
The vital task that the neutral point of transformer is encroached on from various overvoltage, and subject environment and various weather conditions year in year out
Influence, continuous attack metal components make its corrosion, and then influence the mechanical electric performance of product, threaten power grid fortune
Capable reliability.A kind of non-maintaining or reduced-maintenance neutral resistance combination of reliable performance of power equipment market in urgent need is set
It is standby, so that safe operation of the transformer in power grid can have better guarantee in 6~35kV, 50Hz medium-voltage distribution power grid.
Summary of the invention
Regarding the issue above, the present invention provides a kind of assembling landscape type for neutral resistance protection
Unit equipment.
In order to achieve the above objectives, present invention employs following technical proposals:
A kind of assembling landscape type unit equipment for neutral resistance protection, including it is connected to neutral point and the earth
Between ground resistance apparatus and unit equipment cabinet, the ground resistance apparatus is located in the unit equipment cabinet, and institute
Stating ground resistance apparatus includes an incoming-line busbar, ground resistance and current transformer, and neutral point is sequentially connected to described primary
Incoming-line busbar, ground resistance, the primary coil of current transformer and geodetic network, the secondary coil of the current transformer are connected to
Protective relaying device.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the unit equipment cabinet
Including bottom frame, it is provided with frame and column on the bottom frame, the top of the frame and column is equipped with top cover, the frame week
Exterior surface is covered with multiple sealing plates, and the ground resistance apparatus is located in the frame.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, it is embedded on front side of the frame
There is door-plate, and the side of the door-plate is connected by flag-shaped hinge with the frame.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the frame passes through semicircle
Head square neck bolt is connected with the column.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the frame roof and/
Or bottom offers column slot, and the first threaded hole, the top and/or bottom of the column are offered on the cell wall of the column slot
It is inserted in the column slot, and the top of the column and/or bottom end offer the be adapted with first threaded hole
Two threaded holes, the half-round head square neck bolt are connected the frame and column by passing through the first threaded hole and the second threaded hole
It connects.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the frame and column are equal
It is made of aluminizing zine plate material.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the unit equipment cabinet
Front side lower end is covered with anticorrosive wood, and has sealing strip between the anticorrosive wood of longitudinal arrangement；The junction of adjacent sealing plate has close
Strip of paper used for sealing.
Envelope in the above-mentioned assembling landscape type unit equipment for neutral resistance protection, on front side of frame
Riveting has instrument box on plate.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, the column and/or frame
It is fixed with an incoming-line busbar being laterally arranged on frame, is connected with conductive column, the ground resistance on an incoming-line busbar
It is fixed on the top of the conductive column, the current transformer is fixed on base of frame.
In the above-mentioned assembling landscape type unit equipment for neutral resistance protection, connect on the ground resistance
There are multiple terminals out, each terminals corresponds to the different resistance values of the ground resistance.
Relative to the neutral resistance unit equipment of other forms, the present invention has the advantages that using unit equipment
Cabinet accommodates each equipment wherein, has clean and tidy, beautiful and anti-corrosion effect, while being arranged in unit equipment cabinet and being used for
The busbar of inlet wire and unit equipment box house equipment is connected, guarantees the stability of conveying electricity；In dismountable assembling landscape type
Structure, it is excellent to have that structure is simple, be easy to adjustment, good appearance, corrosion resistance are strong, more reliable performance, quick for installation, service life are grown etc.
Point.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the present invention for the assembling landscape type unit equipment of neutral resistance protection；
Fig. 2 is the circuit diagram of neutral resistance protection of the present invention；
Fig. 3 is connection of the present invention for assembling the landscape type unit equipment frame and column of neutral resistance protection
Structure；
Fig. 4 is internal structure chart of the present invention for the assembling landscape type unit equipment of neutral resistance protection.
In figure: unit equipment cabinet 1；Bottom frame 11；Frame 12；Column 13；Top cover 14；Sealing plate 15；Door-plate 16；Anticorrosive wood
17；Sealing strip 18；Incoming-line busbar 21；Ground resistance 22；Terminals 221；Current transformer 23；Half-round head square neck bolt 3；
Column slot 4；Z-type grounding transformer U.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
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 only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment propose it is a kind of for neutral resistance protection assembling landscape type combination set
It is standby, the ground resistance apparatus being connected between neutral point and the earth and unit equipment cabinet 1 are specifically included, ground resistance apparatus is
It is connected to a kind of current limliting electric protective equipment of the transformer (or generator) between neutral point and the earth；As shown in Fig. 2, in power grid
It does not work when normal operation, when power network line outlet failure, transformer neutral point voltage will generate offset, at this time due to transformation
Device neutral point is connected to ground resistance apparatus, and power network neutral point can be forced to be grounded by ground resistance apparatus, and limit its failure
Electric current realizes tripping and spare switching, avoids power distribution network and electricity so that relay protection device be made to have time enough to be detected
Gas equipment is destroyed.
Wherein ground resistance apparatus is located in unit equipment cabinet 1.Specifically, ground resistance apparatus includes an inlet wire mother
Row 21, ground resistance 22 and current transformer 23, the neutral points of the equipment such as transformer or generator with cable be connected to once into
Then line busbar 21 is connected to the primary coil and the earth of ground resistance 22, current transformer 23 by successively incoming-line busbar 21
For net to constitute earth-return circuit, the secondary coil of current transformer 23 is connected to protective relaying device, and secondary coil is by the electricity of measurement
Flow valuve is exported to electromechanical protection device, to realize the automatic protection of transformer neutral point overvoltage.
Further, the dismountable connection structure of the use of unit equipment cabinet 1 specifically includes bottom frame 11, consolidates on bottom frame 11
Surely there are frame 12 and column 13, frame 12 is connected by half-round head square neck bolt 3 with column 13；Door-plate is embedded on front side of frame 12
16, the side of door-plate 16 is connected by flag-shaped hinge with frame 12.The top of frame 12 and column 13 is equipped with top cover 14, frame
12 circumferential exterior surfaces are covered with multiple sealing plates 15, and ground resistance apparatus is located inside frame 12.
Further, it as shown in figure 3,12 top and bottom of frame offer column slot 4, is opened on the cell wall of column slot 4
Equipped with the first threaded hole, the top and bottom of column 13 are inserted in the column slot 4 of frame roof and the column of base of frame respectively
In slot 4, and the top of column 13 and bottom end offer the second threaded hole being adapted with the first threaded hole, half-round head square neck bolt
3 are connect frame 12 with column 13 by passing through the first threaded hole and the second threaded hole.
Preferably, frame 12 is made with column 13 of aluminizing zine plate material, and 1 front side lower end of unit equipment cabinet is covered with
Anticorrosive wood 17, and there is sealing strip 18 between the anticorrosive wood 17 of longitudinal arrangement；Similarly, the junction of adjacent sealing plate 15 has close
Strip of paper used for sealing 18.
Here the splendid aluminizing zine plate material of corrosion resistance is applied to ground resistance unit equipment, with the mode of assembling,
Each component of cabinet is connected with each other, makes product from the influence of outdoor environment factor；And setting anticorrosive wood in side mentions outside the enclosure
High cabinet anti-corrosion effect, while there is beautification function, it is allowed to mutually coordinate with ambient enviroment, meets Urban ecological design theory.
Further, instrument box is riveted on the sealing plate 15 of the front side of frame 12, convenient for staff's observation, debugging and
The work such as maintenance.Current transformer 23 is fixed on 12 bottom of frame.
Further, as shown in figure 4, lower portion, which is located on column 13 and/or frame 12, is fixed with two rows of laterally settings
An incoming-line busbar 21, there are two conductive columns, the other end of each conductive column to connect for connection on incoming-line busbar 21 of every row
It is connected to a ground resistance 22, and has picked out at least two terminals 221, each terminals on each ground resistance 22
221 correspond to the different resistance values of ground resistance 22.It can easily select suitably to be grounded as needed in this way in staff
Resistance is particularly suitable for needing to be replaced frequently the occasion of ground resistance resistance value convenient for the work such as debugging and maintenance.
The present embodiment is accommodated each equipment wherein using unit equipment cabinet 1, and whole design is at modular construction, respectively
Dismountable connection type is used between component, is easy to implement modularization, mass production, complete property is strong, is greatly improved
Production efficiency.Product can transport to use site, Yong Hu after manufactory's assembling and setting is qualified by the way of entire package
Use site is not required to reassemble product and adjust and can come into operation, and product is convenient to install and maintain quick using safe,
The installation phase of user is shortened, and can better ensure that performance reliability and service life of the product after putting into operation.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of assembling landscape type unit equipment for neutral resistance protection, including it is connected to neutral point and the earth
Between ground resistance apparatus, which is characterized in that further include unit equipment cabinet (1), the ground resistance apparatus is located at described group
It closes in equipment box (1), and the ground resistance apparatus includes an incoming-line busbar (21), ground resistance (22) and Current Mutual Inductance
Device (23), neutral point be sequentially connected to an incoming-line busbar (21), ground resistance (22), current transformer (23) it is primary
The secondary coil of coil and geodetic network, the current transformer (23) is connected to protective relaying device.
2. the assembling landscape type unit equipment according to claim 1 for neutral resistance protection, feature exist
In the unit equipment cabinet (1) includes bottom frame (11), is provided with frame (12) and column (13), institute on the bottom frame (11)
The top for stating frame (12) and column (13) is equipped with top cover (14), and frame (12) circumferential exterior surface is covered with multiple sealing plates
(15), the ground resistance apparatus is located in the frame (12).
3. the assembling landscape type unit equipment according to claim 2 for neutral resistance protection, feature exist
In frame (12) front side is embedded with door-plate (16), and the side of the door-plate (16) passes through flag-shaped hinge and the frame
(12) it is connected.
4. the assembling landscape type unit equipment according to claim 2 for neutral resistance protection, feature exist
In the frame (12) is connected by half-round head square neck bolt (3) with the column (13).
5. the assembling landscape type unit equipment according to claim 4 for neutral resistance protection, feature exist
In at the top of the frame (12) and/or bottom offers column slot (4), offers the first spiral shell on the cell wall of the column slot (4)
Pit, the top and/or bottom of the column (13) are inserted in the column slot (4), and the top of the column (13) and/
Or bottom end offer with first threaded hole be adapted the second threaded hole, the half-round head square neck bolt (3) by across
The frame (12) is connect by the first threaded hole and the second threaded hole with column (13).
6. the assembling landscape type unit equipment according to claim 5 for neutral resistance protection, feature exist
In the frame (12) is made with column (13) of aluminizing zine plate material.
7. the assembling landscape type unit equipment according to claim 2 for neutral resistance protection, feature exist
In lower end is covered with anticorrosive wood (17) on front side of the unit equipment cabinet (1), and is had between the anticorrosive wood (17) of longitudinal arrangement
Sealing strip (18)；Adjacent sealing plate (15) junction have sealing strip (18).
8. the assembling landscape type unit equipment according to claim 2 for neutral resistance protection, feature exist
In being located at riveting on the sealing plate (15) on front side of frame (12) has instrument box.
9. the assembling landscape type unit equipment according to claim 1 for neutral resistance protection, feature exist
In being fixed with an incoming-line busbar (21) being laterally arranged, an inlet wire mother on the column (13) and/or frame (12)
It is connected with conductive column on row (21), the ground resistance (22) is fixed on the top of the conductive column, the current transformer
(23) it is fixed on frame (12) bottom.
10. the assembling landscape type unit equipment according to claim 9 for neutral resistance protection, feature exist
In having picked out multiple terminals (221) on the ground resistance (22), it is electric that each terminals (221) corresponds to the ground connection
Hinder the different resistance values of (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247742.7A CN109980623A (en) | 2019-03-29 | 2019-03-29 | Assembling landscape type unit equipment for neutral resistance protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247742.7A CN109980623A (en) | 2019-03-29 | 2019-03-29 | Assembling landscape type unit equipment for neutral resistance protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109980623A true CN109980623A (en) | 2019-07-05 |
Family
ID=67081473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910247742.7A Pending CN109980623A (en) | 2019-03-29 | 2019-03-29 | Assembling landscape type unit equipment for neutral resistance protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109980623A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543343A (en) * | 2024-01-09 | 2024-02-09 | 山西中能天胜科技有限公司 | Power distribution protection device for gardens and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005033877A (en) * | 2003-07-09 | 2005-02-03 | Mitsubishi Electric Corp | Earth fault protection device for generator of gas turbine power generation plant |
| CN2759023Y (en) * | 2004-12-28 | 2006-02-15 | 广州南方电力集团电器有限公司 | Combined ground resistance apparatus |
| CN208062789U (en) * | 2018-04-23 | 2018-11-06 | 厦门兴厦控恒昌自动化有限公司 | A kind of transformer neutral point earthing resistance cabinet complexes |
-
2019
- 2019-03-29 CN CN201910247742.7A patent/CN109980623A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005033877A (en) * | 2003-07-09 | 2005-02-03 | Mitsubishi Electric Corp | Earth fault protection device for generator of gas turbine power generation plant |
| CN2759023Y (en) * | 2004-12-28 | 2006-02-15 | 广州南方电力集团电器有限公司 | Combined ground resistance apparatus |
| CN208062789U (en) * | 2018-04-23 | 2018-11-06 | 厦门兴厦控恒昌自动化有限公司 | A kind of transformer neutral point earthing resistance cabinet complexes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543343A (en) * | 2024-01-09 | 2024-02-09 | 山西中能天胜科技有限公司 | Power distribution protection device for gardens and application method thereof |
| CN117543343B (en) * | 2024-01-09 | 2024-04-02 | 山西中能天胜科技有限公司 | Power distribution protection device for gardens and application method thereof |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190705 |
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| RJ01 | Rejection of invention patent application after publication |