CN104362441A - Grounding grid resistance reduction method for high soil resistivity transformer substation - Google Patents

Grounding grid resistance reduction method for high soil resistivity transformer substation Download PDF

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Publication number
CN104362441A
CN104362441A CN201410652419.5A CN201410652419A CN104362441A CN 104362441 A CN104362441 A CN 104362441A CN 201410652419 A CN201410652419 A CN 201410652419A CN 104362441 A CN104362441 A CN 104362441A
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CN
China
Prior art keywords
resistance
grounding
transformer substation
resistivity
soil
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Pending
Application number
CN201410652419.5A
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Chinese (zh)
Inventor
王炜
汤永春
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JURONG HUAYUAN ELECTRICAL APPLIANCE EQUIPMENT CO Ltd
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JURONG HUAYUAN ELECTRICAL APPLIANCE EQUIPMENT CO Ltd
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Priority to CN201410652419.5A priority Critical patent/CN104362441A/en
Publication of CN104362441A publication Critical patent/CN104362441A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors

Abstract

A grounding grid resistance reduction method for a high soil resistivity transformer substation includes the following steps of a, a horizontal epitaxy laying ground connection method, b, a deeply-buried type grounding electrode method, c, a ground resistance drag-reduction agent laying method and d, an electrolytic ion grounding system using method. According to the deeply-buried type grounding electrode method, after a grounding body is deeply buried, the grounding body goes deep into a stratum with low earth resistivity, and thus the purpose of reducing ground resistance can be achieved through small earth resistivity. According to the ground resistance drag-reduction agent laying method, after the drag-reduction agent is laid around the grounding electrode, the functions of increasing the appearance size of the grounding electrode and lowering contact resistance can be achieved. According to the electrolytic ion grounding system using method, active electrolytic ions are released continuously and automatically, so that the electrical conductivity of surrounding soil is made to be kept at a high level all the time, hence, fault currents can be diffused into the surrounding soil smoothly, and the protective effect of the grounding system can be fully achieved. By means of the grounding grid resistance reduction method for the high soil resistivity transformer substation, the soil resistivity can be effectively lowered, and the reliable operation of the power system and the personal safety of workers of the transformer substation can be guaranteed; moreover, implementation is easy, and construction cost is low.

Description

High soil resistivity grounding net of transformer substation methods to reduce resistance
Technical field
The present invention relates to high soil resistivity grounding net of transformer substation methods to reduce resistance, belong to power technology in field.
Background technology
Due to the restriction by geographical conditions, some transformer station has to build high soil resistivity in, causes the design calculated value of the earth resistance of these transformer stations, step voltage and touch voltage higher, cannot meet the requirement of current standard.Therefore, rationally determine the design of earthing device, reduce earth resistance, this is one of emphasis of transformer station's electrical design construction.
Summary of the invention
According to above-mentioned requirements, the object of this invention is to provide high soil resistivity grounding net of transformer substation methods to reduce resistance, effectively to reduce soil resistivity, ensure the reliability service of electric power system and the personal safety of work of transformer substation personnel.
For achieving the above object, the present invention is realized by following technological means:
High soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: comprise following methods:
A. horizontal extension ground connection is laid: level is put and established operating expenses low, not only can reduce power frequency earthing resistance, effectively can also reduce impulse earthed resistance;
B. deep embeded type earth electrode: after buried earth electrode, makes earth electrode be deep in the low stratum of earth resistivity, is reached the object reducing earth resistance by little earth resistivity;
C. lay Earthing Resistance Reducer: laid resistance reducing agent around earth electrode after, can play and increase earth electrode overall dimension, reduce the effect of contact resistance;
D. electrolytic ion grounding system is utilized: constantly release active electrolytic ion makes the electric conductivity of surrounding soil to remain at higher level automatically; so fault current can be diffused in the soil of surrounding smoothly, thus give full play to the protective effect of grounding system.
Further:
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: the described horizontal extension earthing method that lays is applicable to smooth relief.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, is applicable to the place that underground water is comparatively abundant and level of ground water is higher.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, as swum metal ore near ground network, earth electrode is inserted ore body.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, the spacing of buried earth electrode is greater than 20m.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described lays Earthing Resistance Reducer method, and resistance reducing agent is by the formulated chemical resistance-reducing agent of several material.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described utilizes electrolytic ion grounding system method, and described electrolytic ion is discharged by nontoxic electrolytic ion compound.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described electrolytic ion compound is contained in copper alloy tube.
The invention has the beneficial effects as follows: high soil resistivity grounding net of transformer substation methods to reduce resistance of the present invention, effectively can reduce soil resistivity, ensure the reliability service of electric power system and the personal safety of work of transformer substation personnel, and it is simple to have enforcement, the advantage that construction cost is low.
Embodiment
High soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: comprise following methods:
A. horizontal extension ground connection is laid: level is put and established operating expenses low, not only can reduce power frequency earthing resistance, effectively can also reduce impulse earthed resistance;
B. deep embeded type earth electrode: after buried earth electrode, makes earth electrode be deep in the low stratum of earth resistivity, is reached the object reducing earth resistance by little earth resistivity;
The method of buried earth electrode can be adopted to reduce earth resistance.Therefore utilize the earth character, after buried earth electrode, make earth electrode be deep in the low stratum of earth resistivity, reached the object reducing earth resistance by little earth resistivity.
C. lay Earthing Resistance Reducer: laid resistance reducing agent around earth electrode after, can play and increase earth electrode overall dimension, reduce the effect of contact resistance;
D. electrolytic ion grounding system is utilized: constantly release active electrolytic ion makes the electric conductivity of surrounding soil to remain at higher level automatically; so fault current can be diffused in the soil of surrounding smoothly, thus give full play to the protective effect of grounding system.
The too high immediate cause of soil resistivity is that electrolytic ion grounding system can provide a large amount of free ions in soil, thus effectively solves problem with grounding in default of the additional conductive effect of free ion in soil.
Further:
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: the described horizontal extension earthing method that lays is applicable to smooth relief.
Level is put and is established operating expenses low, and in the place that physical features is smooth, the method is preferred option.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, is applicable to the place that underground water is comparatively abundant and level of ground water is higher.
Underground water can play the effect strengthening conduction, reduces high soil resistivity.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, as swum metal ore near ground network, earth electrode is inserted ore body.
Equally, ore body can play the effect strengthening conduction, reduces high soil resistivity.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described deep embeded type earth electrode method, the spacing of buried earth electrode is greater than 20m.
The spacing of buried earth electrode should be greater than 20m, can disregard the impact of shielding mutually.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described lays Earthing Resistance Reducer method, and resistance reducing agent is by the formulated chemical resistance-reducing agent of several material.
Resistance reducing agent adopts industry is commonly used, neutral ion compound composition, to guarantee to provide stable, reliable ground protection.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described utilizes electrolytic ion grounding system method, and described electrolytic ion is discharged by nontoxic electrolytic ion compound.
Described high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: described electrolytic ion compound is contained in copper alloy tube.
Copper alloy tube; to guarantee higher electric conductivity and longer useful life; it is inner containing special, nontoxic electrolytic ion compound; the moisture in air can be absorbed; by deliquescent effect, active electrolytic ion is effectively discharged in surrounding soil, makes the electric conductivity of surrounding soil to remain at higher level; so fault current can be diffused in the soil of surrounding smoothly, thus give full play to the protective effect of grounding system.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.

Claims (8)

1. high soil resistivity grounding net of transformer substation methods to reduce resistance, is characterized in that: comprise following methods:
A. horizontal extension ground connection is laid: level is put and established operating expenses low, not only can reduce power frequency earthing resistance, effectively can also reduce impulse earthed resistance;
B. deep embeded type earth electrode: after buried earth electrode, makes earth electrode be deep in the low stratum of earth resistivity, is reached the object reducing earth resistance by little earth resistivity;
C. lay Earthing Resistance Reducer: laid resistance reducing agent around earth electrode after, can play and increase earth electrode overall dimension, reduce the effect of contact resistance;
D. electrolytic ion grounding system is utilized: constantly release active electrolytic ion makes the electric conductivity of surrounding soil to remain at higher level automatically; so fault current can be diffused in the soil of surrounding smoothly, thus give full play to the protective effect of grounding system.
2. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, is characterized in that: the described horizontal extension earthing method that lays is applicable to smooth relief.
3. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, is characterized in that: described deep embeded type earth electrode method, is applicable to the place that underground water is comparatively abundant and level of ground water is higher.
4. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, is characterized in that: described deep embeded type earth electrode method, as swum metal ore near ground network, earth electrode being inserted ore body.
5. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, is characterized in that: described deep embeded type earth electrode method, the spacing of buried earth electrode is greater than 20m.
6. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, it is characterized in that: described lays Earthing Resistance Reducer method, resistance reducing agent is by the formulated chemical resistance-reducing agent of several material.
7. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 1, it is characterized in that: described utilizes electrolytic ion grounding system method, described electrolytic ion is discharged by nontoxic electrolytic ion compound.
8. high soil resistivity grounding net of transformer substation methods to reduce resistance as claimed in claim 7, is characterized in that: described electrolytic ion compound is contained in copper alloy tube.
CN201410652419.5A 2014-11-18 2014-11-18 Grounding grid resistance reduction method for high soil resistivity transformer substation Pending CN104362441A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901030A (en) * 2015-06-09 2015-09-09 河北省电力勘测设计研究院 Construction method of resistance reduction and grounding device of transformer station
CN107959135A (en) * 2017-12-22 2018-04-24 国网山东省电力公司济宁供电公司 A kind of novel integrated earthed system and construction method based on more performances
CN109066250A (en) * 2018-08-14 2018-12-21 中国铁建电气化局集团北方工程有限公司 Mountain area high roadbed, high soil resistivity high-speed railway traction substation are grounded engineering method
CN111883942A (en) * 2020-07-13 2020-11-03 中国人民解放军63653部队 High-resistance rock cavern indoor full-section combined grounding technology
CN112350128A (en) * 2020-09-28 2021-02-09 甘肃酒钢集团宏兴钢铁股份有限公司 Manufacturing method of grounding device of open-air limestone mine power supply system

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Publication number Priority date Publication date Assignee Title
US3726812A (en) * 1970-05-29 1973-04-10 Nitto Chemical Industry Co Ltd Acrylamide type earth resistance reducing agent and method of use thereof
CN102280726A (en) * 2011-05-18 2011-12-14 湖南省电力公司科学研究院 Method for reducing grounding resistance of grounding network with non-uniform soil resistivity
CN102610935A (en) * 2012-03-31 2012-07-25 云南省昆明农业气象试验站 Soil non-excavation grounding resistance reduction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726812A (en) * 1970-05-29 1973-04-10 Nitto Chemical Industry Co Ltd Acrylamide type earth resistance reducing agent and method of use thereof
CN102280726A (en) * 2011-05-18 2011-12-14 湖南省电力公司科学研究院 Method for reducing grounding resistance of grounding network with non-uniform soil resistivity
CN102610935A (en) * 2012-03-31 2012-07-25 云南省昆明农业气象试验站 Soil non-excavation grounding resistance reduction method

Non-Patent Citations (1)

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Title
余晓东: "高土壤电阻率地区变电站接地设计与降阻技术研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》, 15 December 2009 (2009-12-15), pages 2 - 6 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901030A (en) * 2015-06-09 2015-09-09 河北省电力勘测设计研究院 Construction method of resistance reduction and grounding device of transformer station
CN107959135A (en) * 2017-12-22 2018-04-24 国网山东省电力公司济宁供电公司 A kind of novel integrated earthed system and construction method based on more performances
CN109066250A (en) * 2018-08-14 2018-12-21 中国铁建电气化局集团北方工程有限公司 Mountain area high roadbed, high soil resistivity high-speed railway traction substation are grounded engineering method
CN109066250B (en) * 2018-08-14 2019-11-19 中国铁建电气化局集团北方工程有限公司 Mountain area high roadbed, high soil resistivity high-speed railway traction substation are grounded engineering method
CN111883942A (en) * 2020-07-13 2020-11-03 中国人民解放军63653部队 High-resistance rock cavern indoor full-section combined grounding technology
CN112350128A (en) * 2020-09-28 2021-02-09 甘肃酒钢集团宏兴钢铁股份有限公司 Manufacturing method of grounding device of open-air limestone mine power supply system

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