CN102723617A - Equipotential grounding structure for control system of gas-turbine generator set - Google Patents
Equipotential grounding structure for control system of gas-turbine generator set Download PDFInfo
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- CN102723617A CN102723617A CN2012102110863A CN201210211086A CN102723617A CN 102723617 A CN102723617 A CN 102723617A CN 2012102110863 A CN2012102110863 A CN 2012102110863A CN 201210211086 A CN201210211086 A CN 201210211086A CN 102723617 A CN102723617 A CN 102723617A
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Abstract
The invention discloses an equipotential grounding structure for a control system of a gas-turbine generator set. The equipotential grounding structure comprises an equipotential grounding device which is connected with a ground electrode in single point mode. More than one grounding terminal for single point connection of weak current electrical appliances is arranged on the equipotential grounding device. The equipotential grounding structure can reduce potential difference between devices, removes interference and improves electromagnetic compatibility of the control system of the gas-turbine generator set.
Description
Technical field
The present invention relates to Gas Turbine Generating Units electric power system and electromagnetic compatibility field, especially, relate to a kind of electrical grounding structure that is used for the Gas Turbine Generating Units control system.
Background technology
During Gas Turbine Generating Units electric equipment operate as normal, need to install exposed conductive part ground connection, just the ground connection of electric equipment shell in the low-voltage electrical appliance is called protective earthing.
As shown in Figure 1, existing earthing mode is around factory building, to bury earth electrode 5 underground, in factory building, lays ground connection band steel 6 along wall then, and earth electrode 5 leads to (not shown) with ground connection band steel 6 through multiple spot welding in succession.All equipment that need ground connection such as the unit control cubicle of combustion machine, generator control cabinet, stand, low-voltage cabinet, high-voltage board, direct current cabinet, 24V battery terminal negative, frequency converter all nearby with factory building in ground connection band steel 6 be connected, stand is connected with the earth through 2.Gas Turbine Generating Units is fired unit control cubicle, generator control cabinet, stand, low-voltage cabinet, high-voltage board, direct current cabinet, 24V battery terminal negative, frequency converter of machine etc. at present, and all need the equipment of ground connection to concentrate on an earth electrode ground connection all.
This ground structure has the following advantages: the earth fault loop resistance is little, and short circuit current is big, is easy to adopt all kinds protective device, disjunction power supply, protection electric equipment, distribution line and personal safety.But false voltage can spread between each device along earth connection.Owing to the imbalance of three-phase system, add a large amount of uses of components and parts such as gaseous discharge lamp, electric ballast, three times and multiple harmonic sharp increase in the circuit; A large amount of zero-sequence currents flow through earth connection; In a single day the voltage drop of its generation is fluctuateed to some having a resistance property of sensitiveness electronic equipment interference, and disturbs, because a large amount of earth connections are arranged; Very difficult the eliminating disturbed, and has a strong impact on unit debugging and normal operation.
Summary of the invention
The object of the invention is to provide a kind of can reduce the equipment room potential difference, eliminate the electrical grounding structure that is used for the Gas Turbine Generating Units control system of disturbing, improving the Electro Magnetic Compatibility of Gas Turbine Generating Units control system, to solve the technical problem that the Gas Turbine Generating Units control system is subject to disturb and be difficult to get rid of interference.
For realizing above-mentioned purpose; The invention provides a kind of electrical grounding structure that is used for the Gas Turbine Generating Units control system; Comprise: the electrical grounding device that single-point is connected with earth electrode, said electrical grounding device are provided with the earth terminal that supplies light current electric equipment single-point to insert more than.
As further improvement of the present invention:
Said electrical grounding device comprises the electrical grounding copper bar; Said electrical grounding copper bar is provided with the screw more than two; Wherein, a screw is connected with earth electrode through a copper conductor, and all the other screws supply light current electric equipment single-point to insert as earth terminal.
Said light current electric equipment comprises unit control cubicle, stand and dc power cathode.
Said DC power supply is the 24V battery.
Said electrical grounding copper bar is installed in the insulation casing, and said insulation casing is installed on body of wall or the frame and electric insulation between said electrical grounding copper bar and said body of wall or the frame.
The sectional area of said copper conductor is not less than 50mm
2
The resistance of said earth electrode is less than 1 Ω.
The present invention has following beneficial effect:
1, the electrical grounding structure that is used for the Gas Turbine Generating Units control system of the present invention; Make the weak current equipment in the Gas Turbine Generating Units control system adopt an equipotential as ground or negative pole; There is not potential difference between the equipment ground wire; Can eliminate crosstalking between the weak current equipment, reduce of the interference of other weak current equipments the unit control cubicle.In addition, weak current equipment separates ground connection with heavy current installation, can prevent that electromagnetic wave from bringing the light current circuit into by the forceful electric power circuit, reduces that scattered electromagnetic wave improves the Electro Magnetic Compatibility of control system to the interference of Gas Turbine Generating Units control system in the external magnetic field.
2, the electrical grounding structure that is used for the Gas Turbine Generating Units control system of the present invention; Weak current equipment all adopts single-point to insert the electrical grounding copper bar; Equipment in the stand adopts an equipotential as ground or negative pole, can eliminate original equipment room potential difference that produces because of 2 ground connection of stand, makes that the equipment in the stand is worked on same earth potential; Can eliminate the equipment interference each other in the stand, improve the precision and the stability of measuring equipment.
3, the electrical grounding structure that is used for the Gas Turbine Generating Units control system of the present invention, equipotential bonding can better reduce the potential difference between device housings than protective earthing commonly used, can reduce prospective touch voltage; False voltage eliminates danger.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the ground structure sketch map of Gas Turbine Generating Units control system of the prior art;
Fig. 2 is the composition sketch map of the electrical grounding structure that is used for the Gas Turbine Generating Units control system of the preferred embodiment of the present invention;
Fig. 3 is the electrical grounding structure user mode sketch map that is used for the Gas Turbine Generating Units control system of the preferred embodiment of the present invention.
Marginal data:
1, electrical grounding device; 2, electrical grounding copper bar; 3, earth terminal; 4, insulation casing; 5, earth electrode; 6, ground connection band steel; 7,24V GND.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 2, Fig. 3; The electrical grounding structure that is used for the Gas Turbine Generating Units control system of the present invention; Comprise: the electrical grounding device 1 that single-point is connected with earth electrode 5, electrical grounding device 1 are provided with the earth terminal 3 that supplies light current electric equipment single-point to insert more than.
In the present embodiment; Electrical grounding device 1 comprises electrical grounding copper bar 2; Electrical grounding copper bar 2 is provided with four screws, and wherein, a screw is connected with earth electrode 5 through a copper conductor; Its excess-three screw supplies light current electric equipment single-point to insert as earth terminal 3, and screw is generally brass screw.The sectional area of the copper conductor that is connected with earth electrode 5 is not less than 50mm
2The resistance of earth electrode 5 is less than 1 Ω.
In the present embodiment, the light current electric equipment comprises unit control cubicle, stand and 24V GND 7.Stand also is not less than 50mm through sectional area
2The copper conductor single-point be connected on the earth terminal 3, unit control cubicle and 24V GND 7 are not less than 16mm through sectional area respectively separately
2The copper conductor single-point be connected on the earth terminal 3.The unit control cubicle has mainly been installed PLC control system and ancillary equipment thereof; Measuring equipment, electrohydraulic servo valve etc. have been installed in the stand.In stand; Each equipment ground line all single-point access nearby is located on the stand ground connection copper bar in the stand, and stand ground connection copper bar is communicated with the stand shell, and stand shell single-point inserts electrical grounding copper bar 2; Can eliminate original equipment room potential difference that produces because of 2 ground connection of stand; The equipment in the stand that makes is worked on same earth potential, can eliminate the equipment interference each other in the stand, improves the precision and the stability of measuring equipment.All the other equipment, as: generator control cabinet, low-voltage cabinet, high-voltage board and direct current cabinet (exchanging changes direct current, adopts AC power) etc. still adopt existing ground structure (inserting ground connection band steel 6) to carry out ground connection.
In the present embodiment, electrical grounding copper bar 2 be installed in one the insulation casing 4 in, the insulation casing 4 be installed on body of wall or the frame and electrical grounding copper bar 2 and body of wall or frame between electric insulation.
To sum up; Adopt ground structure of the present invention, make that the weak current equipment in the Gas Turbine Generating Units control system adopts an equipotential as ground or negative pole, do not have potential difference between the equipment ground wire; Can eliminate crosstalking between the weak current equipment, reduce of the interference of other weak current equipments the unit control cubicle.In addition; Weak current equipment separates ground connection with heavy current installation; Can prevent that electromagnetic wave from bringing the light current circuit into by the forceful electric power circuit, reduce that scattered electromagnetic wave is to the interference of Gas Turbine Generating Units control system in the external magnetic field, the heavy current installation here mainly refers to low-voltage cabinet and high-voltage board etc.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. electrical grounding structure that is used for the Gas Turbine Generating Units control system; It is characterized in that; Comprise: the electrical grounding device (1) that single-point is connected with earth electrode (5), said electrical grounding device (1) are provided with the earth terminal (3) that supplies light current electric equipment single-point to insert more than.
2. the electrical grounding structure that is used for the Gas Turbine Generating Units control system according to claim 1; It is characterized in that; Said electrical grounding device (1) comprises electrical grounding copper bar (2), and said electrical grounding copper bar (2) is provided with the screw more than two, wherein; A screw is connected with earth electrode (5) through a copper conductor, and all the other screws supply light current electric equipment single-point to insert as earth terminal (3).
3. the electrical grounding structure that is used for the Gas Turbine Generating Units control system according to claim 2 is characterized in that said light current electric equipment comprises unit control cubicle, stand and dc power cathode.
4. the electrical grounding structure that is used for the Gas Turbine Generating Units control system according to claim 3 is characterized in that said DC power supply is the 24V battery.
5. according to each described electrical grounding structure that is used for the Gas Turbine Generating Units control system in the claim 1～4; It is characterized in that; Said electrical grounding copper bar (2) is installed in the insulation casing (4), and said insulation casing (4) is installed on body of wall or the frame and electric insulation between said electrical grounding copper bar (2) and said body of wall or the frame.
6. according to each described electrical grounding structure that is used for the Gas Turbine Generating Units control system in the claim 2～4, it is characterized in that the sectional area of said copper conductor is not less than 50mm
2
7. according to each described electrical grounding structure that is used for the Gas Turbine Generating Units control system in the claim 1～4, it is characterized in that the resistance of said earth electrode (5) is less than 1 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102110863A CN102723617A (en) | 2012-06-25 | 2012-06-25 | Equipotential grounding structure for control system of gas-turbine generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102110863A CN102723617A (en) | 2012-06-25 | 2012-06-25 | Equipotential grounding structure for control system of gas-turbine generator set |
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| CN102723617A true CN102723617A (en) | 2012-10-10 |
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| CN2012102110863A Pending CN102723617A (en) | 2012-06-25 | 2012-06-25 | Equipotential grounding structure for control system of gas-turbine generator set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493782A (en) * | 2018-04-02 | 2018-09-04 | 深圳市怡富通讯科技有限公司 | A kind of prefabricated cabin |
| CN114497857A (en) * | 2022-01-29 | 2022-05-13 | 中船黄埔文冲船舶有限公司 | Power battery system installation process |
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|---|---|---|---|---|
| JP2005033877A (en) * | 2003-07-09 | 2005-02-03 | Mitsubishi Electric Corp | Earth fault protection device for generator of gas turbine power generation plant |
| CN202058870U (en) * | 2011-02-24 | 2011-11-30 | 武汉第二船舶设计研究所 | Grounding device of signal ground grounding system |
-
2012
- 2012-06-25 CN CN2012102110863A patent/CN102723617A/en active Pending
Patent Citations (2)
| 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 |
| CN202058870U (en) * | 2011-02-24 | 2011-11-30 | 武汉第二船舶设计研究所 | Grounding device of signal ground grounding system |
Non-Patent Citations (4)
| Title |
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| 《称重科技-第九届称重技术研讨会论文集》 20100430 刘同海，马洁 谈谈衡器接地系统技术和维护 第46页第1段 7 , * |
| 中华人民共和国机械工业部: "《建筑物防雷设计规范》", 1 February 2001, 中国计划出版社 * |
| 刘同海，马洁: "谈谈衡器接地系统技术和维护", 《称重科技—第九届称重技术研讨会论文集》 * |
| 马岫辉，温志宇: "燃气轮机发电机组控制器的研制", 《中国航空学会轻型燃气轮机专业第四次学术交流会议》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493782A (en) * | 2018-04-02 | 2018-09-04 | 深圳市怡富通讯科技有限公司 | A kind of prefabricated cabin |
| CN108493782B (en) * | 2018-04-02 | 2023-10-20 | 深圳市怡富通讯科技有限公司 | Prefabricated cabin |
| CN114497857A (en) * | 2022-01-29 | 2022-05-13 | 中船黄埔文冲船舶有限公司 | Power battery system installation process |
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Application publication date: 20121010 |