CN112265475A - Method for designing field section grounding path sections of direct-current traction power supply system - Google Patents
Method for designing field section grounding path sections of direct-current traction power supply system Download PDFInfo
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- CN112265475A CN112265475A CN202011044816.6A CN202011044816A CN112265475A CN 112265475 A CN112265475 A CN 112265475A CN 202011044816 A CN202011044816 A CN 202011044816A CN 112265475 A CN112265475 A CN 112265475A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
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Abstract
The invention provides a method for designing grounding paths of field segments of a direct-current traction power supply system in sections. The invention ensures that the grounding paths between the positive line and the field section, and between the inside and outside of the field section library can be segmented, and the stray current is prevented from flowing through the grounding paths.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a field section grounding path sectional design method of a direct-current traction power supply system.
Background
Urban rail transit is increasingly developed vigorously at home and abroad due to energy conservation, environmental protection and high efficiency on time, and a direct-current traction power supply system occupies a higher application proportion.
In the engineering adopting the direct current traction power supply system, the stray current protection problem is one of the key points of engineering attention, and according to research, because the tracks are dense in a field section, the leakage resistance between the steel rail and a track bed is low, so that the stray current of a positive line is gathered towards the field section and then flows through the steel rail to return to the positive line.
At present, in some projects in China, the stray current is reduced to be gathered to a vehicle section by adopting measures such as a one-way conduction device for real-time conduction of a vehicle at a steel rail insulation joint between a main line and a field section, and meanwhile, a method for separating stray current circulation passages inside and outside a warehouse by the steel rail insulation joint and the one-way conduction device is arranged at an entrance of the warehouse. In order to effectively reduce the stray current leakage, an effective grounding path segmentation design scheme is required to be adopted between the positive line and the field section, and between the inside and the outside of the field section library.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for designing the field section grounding path segments of the direct-current traction power supply system, which ensures that grounding paths between a positive line and a field section, and between a field section library and a field section library can be segmented, and avoids stray current from flowing through the grounding paths.
The technical scheme adopted by the invention is as follows: a field segment grounding path segment design method for a direct current traction power supply system is characterized in that segments are correspondingly arranged at field segments and main lines of the direct current traction power supply system, and field segment in-warehouse and out-warehouse boundaries, and isolating switches are arranged at the segments.
And a potential equalizing device is arranged at the subsection.
The field section and the positive line boundary section comprises a contact network overhead ground wire section, a medium-voltage ring network cable metal armor, a shielding layer section and a grounding flat steel section, two ends of the contact network overhead ground wire section, the medium-voltage ring network cable metal armor, the shielding layer section and the grounding flat steel section are respectively provided with a grounding connection jumper wire, and the isolating switch is arranged on the contact network overhead ground wire section.
The contact net overhead ground wire subsection, the medium-voltage looped network cable metal armor and shielding layer subsection and one end of the grounding flat steel subsection, which are positioned on the field section, are communicated through a grounding connection jumper wire, and the contact net overhead ground wire subsection, the medium-voltage looped network cable metal armor and shielding layer subsection and one end of the grounding flat steel subsection, which are positioned on the positive wire, are communicated through the grounding connection jumper wire.
And the grounding busbar in the traction substation in the field section is connected with the medium-voltage ring network cable metal armor and shielding layer section and the grounding flat steel section.
And the section at the boundary between the inside and the outside of the field section library is a contact network overhead ground wire section.
The overhead ground wire section of the overhead ground wire comprises an overhead ground wire section, a contact network section and a traveling rail section, the isolating switch adopts a three-pole isolating switch, the three-pole isolating switch is respectively connected with two ends of the overhead ground wire section, the contact network section and the traveling rail section, and the overhead ground wire section is connected with a grounding connection jumper.
The overhead line system is characterized in that a sectional insulator is arranged on the overhead line system section, and a steel rail insulating joint is arranged on the walking rail section.
And an overhead ground wire terminal lower anchor is arranged at the overhead ground wire subsection.
And the overhead ground wire segments of the contact network in the field section are connected with the grounding busbar through the grounding downlead of the overhead ground wire.
The working principle is as follows: unlike the customary design methods for connected states. The method realizes the stray current path blocking function in the normal operation mode and the grounding protection path communication function in the power supply supporting operation mode by correspondingly arranging sections on each grounding path at the boundary between a field section and a main line and between the field section inside and outside the field section and installing a connection switch. And a potential equalizing device is arranged at the subsection, so that the two ends are in high impedance under the normal condition when no pressure difference exists between the two ends, and when one end has a ground fault or other reasons, the potentials at the two ends are conducted inconsistently, thereby ensuring the personal safety.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can completely block the stray current path formed by the grounding path under the condition of a normal operation mode, thereby reducing the corrosion hazard caused by stray current leakage;
2. the invention can form a working grounding protection path by closing the three-pole isolating switch under the condition of supporting power supply operation;
3. the invention can realize the synchronous open circuit and synchronous connection of the positive electrode, the negative electrode and the grounding at the subsection;
4. the invention is provided with a potential equalizing device, thereby eliminating the potential safety hazard of personnel caused by the pressure difference between two ends of the subsection;
5. the invention has simple structure and is convenient for operation and maintenance.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a ground path segment at the boundary between a field segment and a positive line according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection of the isolation switch at the boundary between the field section and the positive line according to the embodiment of the present invention;
FIG. 4 is a schematic illustration of a ground path segment at the intra-field and extra-field boundaries of an embodiment of the present invention;
FIG. 5 is a schematic diagram of the connections of the isolation switches at the boundary between the interior and the exterior of the field bay according to the embodiment of the present invention;
fig. 6 is a schematic diagram of a three-pole isolating switch according to an embodiment of the invention.
In the figure, 1-overhead earth wire subsection of a contact network, 2-metal armor and shielding layer subsection of a medium-voltage looped network cable, 3-grounding flat steel subsection, 4-isolating switch, 5-potential equalizing device, 6-grounding connection jumper, 7-overhead earth wire grounding down lead, 8-grounding busbar, 9-overhead earth wire terminal down anchor, 10-traction substation, 11-overhead earth wire subsection, 12-contact network subsection and 13-traveling rail subsection.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a method for designing a field section grounding path section of a direct current traction power supply system, as shown in figures 1-6, a field section of the direct current traction power supply system is divided into a positive line and a field section library boundary, each grounding path is correspondingly provided with a section, and an isolating switch 4 and a potential equalizing device 5 are arranged at the section.
The sections at the boundary of the field section and the positive line comprise a contact network overhead ground wire section 1, a medium-voltage looped network cable metal armor and shielding layer section 2 and a grounding flat steel section 3, two ends of the contact network overhead ground wire section 1, the medium-voltage looped network cable metal armor and shielding layer section 2 and the grounding flat steel section 3 are respectively provided with a grounding connection jumper 6, and the isolating switch 4 is arranged on the contact network overhead ground wire section 1. The overhead ground wire section 1 of the contact network, the metal armor and shielding layer section 2 of the medium-voltage ring network cable and one end of the grounding flat steel section 3, which is positioned in the field section, are communicated through a grounding connection jumper 6, and the overhead ground wire section 1 of the contact network, the metal armor and shielding layer section 2 of the medium-voltage ring network cable and one end of the grounding flat steel section 3, which is positioned in the positive line, are communicated through the grounding connection jumper 6. The potential equalizing device 5 is connected to two ends of the grounding flat steel section 3. And a grounding busbar 8 in a traction substation 10 in the field section is connected with the medium-voltage looped network cable metal armor and shielding layer section 2 and the grounding flat steel section 3. The overhead ground wire section 1 of the contact network comprises an overhead ground wire section 11, a contact network section 12 and a traveling rail section 13, the isolating switch 4 adopts a three-pole isolating switch 4, the three-pole isolating switch 4 is respectively connected with two ends of the overhead ground wire section 11, the contact network section 12 and the traveling rail section 13, and the overhead ground wire section 11 is connected with a grounding connection jumper 6. The overhead line system subsection 12 is provided with a subsection insulator, and the traveling rail subsection 13 is provided with a steel rail insulation joint.
And the section at the boundary between the inside and the outside of the field section library is a contact network overhead ground wire section 1. The overhead ground wire section 1 of the contact network comprises an overhead ground wire section 11, a contact network section 12 and a traveling rail section 13, the isolating switch 4 adopts a three-pole isolating switch 4, and the three-pole isolating switch 4 is respectively connected with two ends of the overhead ground wire section 11, the contact network section 12 and the traveling rail section 13. An overhead ground wire terminal lower anchor 9 is arranged at the overhead ground wire section 11, and an electric connecting wire is not arranged at the overhead ground wire terminal lower anchor 9, so that a natural electric section is formed. The overhead line system subsection 12 is provided with a subsection insulator, and the traveling rail subsection 13 is provided with a steel rail insulation joint. The overhead ground wire in the warehouse is connected to a grounding busbar 8 arranged in the warehouse through an overhead ground wire grounding downlead 7, and the overhead ground wire outside the warehouse is connected to a grounding busbar 8 arranged in a traction substation 10 through the overhead ground wire grounding downlead 7, so that a working grounding protection passage under a normal power supply operation mode is formed respectively. Meanwhile, grounding connection jumpers 6 are respectively arranged at two ends of the overhead ground wire section 1 of the overhead ground wire of the contact network at the boundary between the inside and the outside of the field section and at the tail end inside the field section to form a complete grounding path voltage-sharing and standby path network.
Under the normal operation mode, the three-pole disconnecting switch 4 at the grounding passage subsection at the field section and the positive line boundary is in an open state, the stray current circulation passage formed by the field section and the positive line indirect grounding passage is completely blocked, and when the positive line supports the vehicle section power supply operation mode or the vehicle section supports the positive line power supply operation mode, the three-pole disconnecting switch 4 at the grounding passage subsection at the field section and the positive line boundary is closed for forming the working grounding protection passage. Potential equalizing devices 5 are arranged at the segmented positions, the two ends of the potential equalizing devices are high impedance under normal conditions when no pressure difference exists between the two ends, and when one end of the potential equalizing devices is in ground fault or other reasons, the potentials at the two ends are conducted inconsistently, so that personal safety is ensured.
Under the normal operation mode, the three-pole isolating switch 4 at the boundary between the interior and the exterior of the field section warehouse is in an open state, the stray current circulation path formed by the indirect path between the interior and the exterior of the field section warehouse is completely blocked, and when the normal line supports the vehicle section power supply operation mode or the inter-regional power supply support operation mode of the related power supply inside and outside the field section warehouse, the three-pole isolating switch 4 at the boundary between the interior and the exterior of the field section warehouse is closed for forming the working grounding protection path.
Three-pole isolating switch 4 adopts three brake tool bits, shares a connecting shaft, and the connecting shaft is connected with the switch operating rod and drives the operating rod through the operating mechanism box to realize synchronous opening and closing. Two sides of the three knife switch heads are respectively connected to the overhead ground wire subsection 11, the contact network subsection 12 and the traveling rail subsection 13.
The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The scope of the invention is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teaching of the technical solutions of the present invention, should be considered to be within the scope of the present invention, and all equivalent changes and modifications made within the scope of the present invention or equivalent technical solutions designed to achieve the above technical effects are also within the scope of the present invention.
Claims (10)
1. A field segment grounding path subsection design method of a direct current traction power supply system is characterized by comprising the following steps: the field section and the positive line of the direct current traction power supply system, and the boundary between the field section inside and outside the field section library are correspondingly provided with segments on each grounding path, and isolating switches are arranged at the segments.
2. The method of claim 1, wherein the method further comprises: and a potential equalizing device is arranged at the subsection.
3. The method according to claim 2, wherein the method comprises the following steps: the field section and the positive line boundary section comprises a contact network overhead ground wire section, a medium-voltage ring network cable metal armor, a shielding layer section and a grounding flat steel section, two ends of the contact network overhead ground wire section, the medium-voltage ring network cable metal armor, the shielding layer section and the grounding flat steel section are respectively provided with a grounding connection jumper wire, and the isolating switch is arranged on the contact network overhead ground wire section.
4. The method according to claim 3, wherein the method comprises the following steps: the contact net overhead ground wire subsection, the medium-voltage looped network cable metal armor and shielding layer subsection and one end of the grounding flat steel subsection, which are positioned on the field section, are communicated through a grounding connection jumper wire, and the contact net overhead ground wire subsection, the medium-voltage looped network cable metal armor and shielding layer subsection and one end of the grounding flat steel subsection, which are positioned on the positive wire, are communicated through the grounding connection jumper wire.
5. The method according to claim 3, wherein the method comprises the following steps: and the grounding busbar in the traction substation in the field section is connected with the medium-voltage ring network cable metal armor and shielding layer section and the grounding flat steel section.
6. The method according to claim 2, wherein the method comprises the following steps: and the section at the boundary between the inside and the outside of the field section library is a contact network overhead ground wire section.
7. The method according to claim 3 or 6, wherein the method comprises the following steps: the overhead ground wire section of the overhead ground wire comprises an overhead ground wire section, a contact network section and a traveling rail section, the isolating switch adopts a three-pole isolating switch, the three-pole isolating switch is respectively connected with two ends of the overhead ground wire section, the contact network section and the traveling rail section, and the overhead ground wire section is connected with a grounding connection jumper.
8. The method according to claim 7, wherein the method comprises the following steps: the overhead line system is characterized in that a sectional insulator is arranged on the overhead line system section, and a steel rail insulating joint is arranged on the walking rail section.
9. The method according to claim 7, wherein the method comprises the following steps: and an overhead ground wire terminal lower anchor is arranged at the overhead ground wire subsection.
10. The method according to claim 6, wherein the method comprises the following steps: and the overhead ground wire segments of the contact network in the field section are connected with the grounding busbar through the grounding downlead of the overhead ground wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044816.6A CN112265475B (en) | 2020-09-28 | 2020-09-28 | Method for designing field section grounding path sections of direct-current traction power supply system |
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| CN202011044816.6A CN112265475B (en) | 2020-09-28 | 2020-09-28 | Method for designing field section grounding path sections of direct-current traction power supply system |
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| CN112265475A true CN112265475A (en) | 2021-01-26 |
| CN112265475B CN112265475B (en) | 2022-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220330411A1 (en) * | 2021-04-07 | 2022-10-13 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing well site system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996023343A1 (en) * | 1995-01-24 | 1996-08-01 | Elpro Ag Berlin Industrieelektronik Und Anlagenbau | Overvoltage protector |
| EP3351454A1 (en) * | 2017-01-13 | 2018-07-25 | Dual Inventive Holding B.V. | Device for the remote deactivation of an overhead line |
| CN109130962A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of dedicated return current rail system field section segment design scheme |
| CN109130956A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of positive and negative electrode systems in field section and earthed system that special rail flows back under power supply system |
-
2020
- 2020-09-28 CN CN202011044816.6A patent/CN112265475B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996023343A1 (en) * | 1995-01-24 | 1996-08-01 | Elpro Ag Berlin Industrieelektronik Und Anlagenbau | Overvoltage protector |
| EP3351454A1 (en) * | 2017-01-13 | 2018-07-25 | Dual Inventive Holding B.V. | Device for the remote deactivation of an overhead line |
| CN109130962A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of dedicated return current rail system field section segment design scheme |
| CN109130956A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of positive and negative electrode systems in field section and earthed system that special rail flows back under power supply system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220330411A1 (en) * | 2021-04-07 | 2022-10-13 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing well site system |
| US11596047B2 (en) * | 2021-04-07 | 2023-02-28 | Yantai Jereh Petroleum Equipments Technologies Co., Ltd. | Fracturing well site system |
| US11683878B2 (en) | 2021-04-07 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing well site system |
| US11729893B2 (en) | 2021-04-07 | 2023-08-15 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing well site system |
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Address after: Room 125, 36 Central West Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Applicant after: CHINA RAILWAY ELECTRIFICATION SURVEY DESIGN & RESEARCH INSTITUTE Co.,Ltd. Address before: Room 125, 36 Central West Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Applicant before: TIANJIN ZHONGTIE ELECTRIFICATION DESIGN RESEARCH INSTITUTE Co.,Ltd. |
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