CN106159932A - 10kV neutral grounding by small resistance complexes - Google Patents
10kV neutral grounding by small resistance complexes Download PDFInfo
- Publication number
- CN106159932A CN106159932A CN201610476789.7A CN201610476789A CN106159932A CN 106159932 A CN106159932 A CN 106159932A CN 201610476789 A CN201610476789 A CN 201610476789A CN 106159932 A CN106159932 A CN 106159932A
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- Prior art keywords
- humidity
- controller
- resistance
- grounding
- heater
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Classifications
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- 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
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of 10kV neutral grounding by small resistance complexes, including high-tension switch cabinet, grounding transformer, earth resistance summation current transformer, described high-tension switch cabinet, grounding transformer, earth resistance summation current transformer is sequentially connected in series between 10KV bus and ground, described grounding transformer and earth resistance are arranged in casing, humidity sensor is also set up in described casing, controller and heater, the signal of the collection of humidity sensor transmits to controller, controller controls heater action according to receive from humidity sensor signal, when humidity sensor detection ambient humidity is higher than when setting humidity, controller starts heater, reduce humidity, when humidity sensor detection ambient humidity is less than when setting humidity 5%, controller controls heater and stops heating.Reduce the purpose of equipment failure rate.
Description
Technical field
The present invention relates to power domain, in particular it relates to a kind of 10kV neutral grounding by small resistance complexes.
Background technology
At present, along with developing rapidly of urban economy, 10 kV power distribution networks of some big city new developments mainly use underground
Cable, makes capacitive earth current be greatly increased.If employing grounding through arc, then need bigger compensation capacity, Er Qieyao
Configuration multiple stage.10kV distribution network line be in operation operation more, the tap of arc suppression coil adjusts in time and has any problem, and easily goes out
Existing resonance overvoltage phenomenon.Therefore China's many big cities 10 kV power distribution network have employed Neutral Point Through Low Resistance mode
Solve this problem.But in existing neutral grounding by small resistance device, ambient temperature is bigger on the impact of device, especially
In the case of air humidity is relatively big, easily break down.
Summary of the invention
It is an object of the invention to, for the problems referred to above, propose a kind of 10kV neutral grounding by small resistance complexes,
To realize the advantage reducing equipment failure rate.
For achieving the above object, the technical solution used in the present invention is:
A kind of 10kV neutral grounding by small resistance complexes, including high-tension switch cabinet, grounding transformer, earth resistance and electricity
Current transformer, described high-tension switch cabinet, grounding transformer, earth resistance summation current transformer are sequentially connected in series on 10KV bus and ground
Between, described grounding transformer and earth resistance are arranged in casing, also set up in described casing humidity sensor, controller and
Heater, the signal transmission of the collection of humidity sensor to controller, controller according to receive from humidity sensor signal
Control heater action, when humidity sensor detection ambient humidity is higher than when setting humidity, and controller starts heater, reduces
Humidity, when humidity sensor detection ambient humidity is less than when setting humidity 5%, and controller controls heater and stops heating.
Preferably, described earth resistance is adjustable resistance, and the maximum resistance of adjustable resistance is 16 Ω.
Technical scheme has the advantages that
Technical solution of the present invention, by arranging intelligent humidity control, is that the humidity of casing is maintained within a certain range, thus reaches
Reduce the purpose of equipment failure rate.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Fig. 1 is the 10kV neutral grounding by small resistance complexes electrical connection schematic diagram described in the embodiment of the present invention.
1-10KV bus；2-high-tension switch cabinet；3-grounding transformer；4-earth resistance；5-current transformer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred reality described herein
Execute example be merely to illustrate and explain the present invention, be not intended to limit the present invention.
As it is shown in figure 1, a kind of 10kV neutral grounding by small resistance complexes, including high-tension switch cabinet, ground connection transformation
Device, earth resistance summation current transformer, high-tension switch cabinet, grounding transformer, earth resistance summation current transformer are sequentially connected in series
Between 10KV bus and ground, grounding transformer and earth resistance are arranged in casing, also set up in described casing humidity sensor,
Controller and heater, the signal transmission of the collection of humidity sensor to controller, controller passes from humidity according to receive
Sensor signal controls heater action, when humidity sensor detection ambient humidity is higher than when setting humidity, and controller starts heating
Device, reduces humidity, when humidity sensor detection ambient humidity is less than when setting humidity 5%, and controller controls heater and stops adding
Heat.
Preferably, earth resistance is adjustable resistance, and the maximum resistance of adjustable resistance is 16 Ω.
Tank material uses corrosion resistant plate.Grounding transformer, technology requirement is: 1mimn power frequency withstanding voltage: 35kV；
Rated lightning impulse withstand voltage: 75kV；Office zoom level≤10PC；Noise level: under nominal operating conditions, away from transformation
At the horizontal 2m of device body, terrain clearance is at the 1/2 of transformator, measured noise level≤55dB.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (2)
1. 10kV neutral grounding by small resistance complexes, it is characterised in that include high-tension switch cabinet, grounding transformer,
Earth resistance summation current transformer, described high-tension switch cabinet, grounding transformer, earth resistance summation current transformer are sequentially connected in series
Between 10KV bus and ground, described grounding transformer and earth resistance are arranged in casing, also set up humidity and pass in described casing
Sensor, controller and heater, the signal transmission of the collection of humidity sensor to controller, controller according to receive from wet
Degree sensor signal controls heater action, when humidity sensor detection ambient humidity is higher than when setting humidity, and controller starts
Heater, reduces humidity, when humidity sensor detection ambient humidity is less than when setting humidity 5%, and controller controls heater and stops
Only heating.
10kV neutral grounding by small resistance complexes the most according to claim 1, it is characterised in that described ground connection electricity
Resistance is adjustable resistance, and the maximum resistance of adjustable resistance is 16 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476789.7A CN106159932A (en) | 2016-06-27 | 2016-06-27 | 10kV neutral grounding by small resistance complexes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476789.7A CN106159932A (en) | 2016-06-27 | 2016-06-27 | 10kV neutral grounding by small resistance complexes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106159932A true CN106159932A (en) | 2016-11-23 |
Family
ID=57349269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610476789.7A Pending CN106159932A (en) | 2016-06-27 | 2016-06-27 | 10kV neutral grounding by small resistance complexes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159932A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293198A (en) * | 2017-06-21 | 2017-10-24 | 柳州职业技术学院 | A kind of low-voltage power supply system fault diagnosis actual training device |
| CN109004531A (en) * | 2018-07-27 | 2018-12-14 | 国网江苏省电力有限公司苏州供电分公司 | A kind of neutral resistance complexes |
| CN114137354A (en) * | 2021-09-29 | 2022-03-04 | 汕头经济特区广澳电力发展公司 | Low-voltage distribution network electric leakage simulation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06260308A (en) * | 1993-03-04 | 1994-09-16 | Hitachi Ltd | Neutral-point ground apparatus |
| CN203151088U (en) * | 2013-03-31 | 2013-08-21 | 国家电网公司 | Single-phase grounding fault isolation device |
| CN204463970U (en) * | 2015-01-28 | 2015-07-08 | 陕西恒信远电力科技有限公司 | The nonmetal earthing resistance cabinet of a kind of intelligent monitor-type |
| CN205051337U (en) * | 2015-10-02 | 2016-02-24 | 陕西恒信远电力科技有限公司 | Intelligent monitoring type generator ground resistance cabinet |
-
2016
- 2016-06-27 CN CN201610476789.7A patent/CN106159932A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06260308A (en) * | 1993-03-04 | 1994-09-16 | Hitachi Ltd | Neutral-point ground apparatus |
| CN203151088U (en) * | 2013-03-31 | 2013-08-21 | 国家电网公司 | Single-phase grounding fault isolation device |
| CN204463970U (en) * | 2015-01-28 | 2015-07-08 | 陕西恒信远电力科技有限公司 | The nonmetal earthing resistance cabinet of a kind of intelligent monitor-type |
| CN205051337U (en) * | 2015-10-02 | 2016-02-24 | 陕西恒信远电力科技有限公司 | Intelligent monitoring type generator ground resistance cabinet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293198A (en) * | 2017-06-21 | 2017-10-24 | 柳州职业技术学院 | A kind of low-voltage power supply system fault diagnosis actual training device |
| CN109004531A (en) * | 2018-07-27 | 2018-12-14 | 国网江苏省电力有限公司苏州供电分公司 | A kind of neutral resistance complexes |
| CN114137354A (en) * | 2021-09-29 | 2022-03-04 | 汕头经济特区广澳电力发展公司 | Low-voltage distribution network electric leakage simulation system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161123 |
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| RJ01 | Rejection of invention patent application after publication |