CN112485612A - Monitoring system and method for improving insulating property of isolated double-source trolley bus - Google Patents
Monitoring system and method for improving insulating property of isolated double-source trolley bus Download PDFInfo
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- CN112485612A CN112485612A CN202011264679.7A CN202011264679A CN112485612A CN 112485612 A CN112485612 A CN 112485612A CN 202011264679 A CN202011264679 A CN 202011264679A CN 112485612 A CN112485612 A CN 112485612A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 93
- 239000012212 insulator Substances 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims 15
- 239000011241 protective layer Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention relates to a monitoring system and a method for improving the insulating property of an isolated double-source trolley bus, which comprises a wire net, a trolley pole, an insulating shaft sleeve, a trolley frame bottom plate, a first insulator, a cross beam, a second insulator, a DC/DC converter, a motor controller, a high-voltage battery, a whole vehicle controller and a vehicle body, wherein the trolley pole is arranged on the trolley frame bottom plate; connecting wires with electromagnetic shielding layers are adopted for connecting the DC/DC converter and the collecting frame, and two ends of the electromagnetic shielding layers are respectively connected to the shell of the DC/DC converter and the collecting frame bottom plate, so that the collecting frame bottom plate and the shell of the DC/DC converter are at the same potential; when the insulation detector detects the insulation performance of the collector bar and the DC/DC converter shell, the insulation performance of the collector bar, the DC/DC converter shell and the collector frame bottom plate is detected, only the primary insulation of the collector frame is detected, and when the primary insulation of the collector frame system fails, the primary insulation can be found in advance, so that corresponding inspection and maintenance are performed, and the safety performance is improved.
Description
Technical Field
The invention relates to the technical field of electrified highway systems, in particular to a monitoring system and a monitoring method for improving the insulating property of an isolated double-source trolley bus.
Background
In the prior art, three-level insulation is adopted between a collector frame system and a trolley body of a novel double-source trolley bus system. The novel double-source trolley bus system collects the electric energy of a wire net through a trolley pole, and realizes an insulation function with a large bottom plate of an actuating mechanism of a trolley frame through an insulation shaft sleeve, so that the novel double-source trolley bus system is primary insulation of the trolley frame system; two cross beams are additionally arranged under the large bottom plate of the executive mechanism of the collector frame to support the large bottom plate of the collector frame, and the cross beams and the large bottom plate are supported and fixed by insulators to realize the secondary insulation of a collector system; meanwhile, the cross beam and the vehicle body of the system of the collector frame realize three-level insulation through insulators.
The three-level insulation is realized between the collector frame system and the trolley body of the novel double-source trolley bus system in a physical isolation mode. However, only when the primary, secondary and tertiary insulation are all failed, the insulation detection system of the novel double-source trolley bus system can detect the insulation condition of the wire net and the trolley body. When primary insulation and secondary insulation became invalid, and the primary insulation did not become invalid, the insulation detecting system of whole car could not detect out, but the car was can normally operate this moment, so greatly increased whole insulating risk of car, threatened car passenger's life safety and other electrical equipment's safety.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a monitoring system and a monitoring method for improving the insulating property of an isolated double-source trolley bus.
The technical scheme of the invention is as follows: a monitoring system for improving the insulating property of an isolated double-source trolley bus comprises a collector frame (4), a collector frame bottom plate (5), a DC/DC converter (9) and a trolley body (13); wherein, a collector frame bottom plate (5) is supported on one side of the top of the vehicle body (13) through a cross beam (7), a collector frame (4) is fixedly arranged on the top of the collector frame bottom plate (5), and a DC/DC converter (9) is fixedly arranged on the other side of the top of the vehicle body (13); a connecting line (L) with an electromagnetic shielding layer (L1-3) is connected between the collector frame (4) and the DC/DC converter (9), and two ends of the electromagnetic shielding layer (L1-3) of the connecting line (L) are respectively connected with a collector frame bottom plate (5) and a shell (9-1) of the DC/DC converter (9).
Furthermore, the connecting wire (L) sequentially comprises a conductor layer (L1-1), an insulating layer (L1-2), an electromagnetic shielding layer (L1-3), a torsion protection layer (L1-4) and a shell layer (L1-5) from inside to outside in the radial direction.
Further, the thickness of the torsion protection layer (L1-4) is larger than that of the insulation layer (L1-2), the thickness of the insulation layer (L1-2) is larger than that of the electromagnetic shielding layer (L1-3), and the thickness of the insulation layer (L1-2) is larger than that of the shell layer (L1-5).
Furthermore, the collector frame (4) is located at the top center position of the collector frame bottom plate (5), and a distance for connecting an electromagnetic shielding layer (L1-3) of the connecting line (L) exists between the outer edge of the collector frame (4) and the outer edge of the collector frame bottom plate (5).
Furthermore, the cross beams (7) are arranged in a plurality and are uniformly distributed on the periphery of the bottom of the collecting frame bottom plate (5).
Further, the monitoring system also comprises a first insulator (6), a cross beam (7) and a second insulator (8); the first insulator (6) is arranged between the bottom of the collector frame bottom plate (5) and the top of the cross beam (7), and the second insulator (8) is arranged between the bottom of the cross beam (7) and the top of the vehicle body (13).
Further, still provide a monitoring method that promotes isolated double-source trolley bus insulating property, its characterized in that: the method comprises the following steps:
1) replacing a connecting line (L) connecting the DC/DC converter (9) and the power collecting frame (4) with a connecting line (L) with an electromagnetic shielding layer (L1-3);
2) two ends of the electromagnetic shielding layer (L1-3) are respectively connected to a shell (9-1) of the DC/DC converter (9) and a collector frame bottom plate (5), so that the collector frame bottom plate (5) and the shell (9-1) of the DC/DC converter (9) are at the same potential;
3) the insulation performance of the trolley pole (2), the shell (9-1) of the DC/DC converter (9) and the insulation performance of the power collection frame bottom plate (5) can be detected by detecting the insulation performance of the trolley pole (2) and the shell (9-1) of the DC/DC converter (9) through an insulation detector.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the technical scheme provided by the invention, the connecting wires of the DC/DC converter and the current collecting frame are connected by adopting the connecting wires with the electromagnetic shielding layers, and two ends of the electromagnetic shielding layers are respectively connected to the shell of the DC/DC converter and the bottom plate of the current collecting frame, so that the bottom plate of the current collecting frame and the shell of the DC/DC converter are at the same potential; when the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, the insulation performance of the trolley pole, the DC/DC converter shell and the base plate of the collecting rack is detected, which is equivalent to that only the primary insulation of the collecting rack is detected, when the primary insulation of the collecting rack system fails, the primary insulation can be found in advance, corresponding inspection and maintenance are carried out, and the safety performance is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a prior art monitoring system;
FIG. 2 is a schematic diagram of a prior art connection wire;
FIG. 3 is a schematic diagram of a monitoring system provided herein;
FIG. 4 is a schematic structural diagram of a connecting wire provided in the present application;
FIG. 5 is a schematic view of the installation of the connection cable provided herein;
fig. 6 is a structural sectional view of a connection line provided in the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and will therefore make the scope of the invention more clearly and clearly defined.
Fig. 1 is a schematic structural diagram of a monitoring system for improving the insulation performance of an isolated double-source trolley bus adopted in the prior art; the specific scheme is as follows: the device comprises a wire mesh 1, a trolley pole 2, an insulating shaft sleeve 3, a trolley frame 4, a trolley frame bottom plate 5, a first insulator 6, a cross beam 7, a second insulator 8, a DC/DC converter 9, a motor controller 10, a high-voltage battery 11, a whole vehicle controller 12 and a vehicle body 13; the trolley frame bottom plate 5 is supported on one side of the top of the vehicle body 13 through the cross beam 7, the trolley frame 4 is fixedly arranged on the top of the trolley frame bottom plate 5, the top of the trolley frame 4 is connected with the bottom of the trolley pole 2 through the insulating shaft sleeve 3, the top of the trolley pole 2 is in contact with the wire mesh 1 to obtain electric energy, a first insulator 6 is arranged between the bottom of the trolley frame bottom plate 5 and the top of the cross beam 7, a second insulator 8 is arranged between the bottom of the cross beam 7 and the top of the vehicle body 13, a DC/DC converter 9 is fixedly arranged on the other side of the top of the vehicle body 13, the DC/DC converter 9 is electrically connected with a motor controller 10 arranged inside the vehicle body 13, a high-voltage battery 11 arranged inside the vehicle body 13 is connected with the motor controller 10 to provide electric energy.
Adopt tertiary insulation between trolley bus's collecting frame 4 and automobile body 13 of two sources:
1) the double-source trolley bus collects the electric energy of a wire mesh 1 through a trolley pole 2, and realizes an insulation function with a trolley frame bottom plate 5 through an insulation shaft sleeve 3, namely primary insulation between a trolley frame 4 and a trolley body 13;
2) two cross beams 7 are additionally arranged below the collector frame bottom plate 5 to support the collector frame bottom plate 5, and a first insulator 6 is used for supporting and fixing the cross beams 7 and the collector frame bottom plate 5 to realize secondary insulation;
3) and the cross beam 7 and the vehicle body 13 are insulated in a three-level manner through a second insulator 8.
The three-level insulation is realized between the collector frame 4 and the trolley body 13 of the double-source trolley bus in a physical isolation mode. However, only when the primary, secondary and tertiary insulation fails, the insulation detection system of the double-source trolley bus can detect the failure condition by detecting the insulation condition of the wire net and the vehicle body. When primary insulation and secondary insulation fail, an insulation detection system of the whole vehicle cannot detect the failure, but the vehicle can normally operate at the moment, so that the insulation risk of the whole vehicle is greatly increased, and the life safety of vehicle passengers and the safety of other electrical equipment are threatened.
The insulation detection scheme in the prior art is to detect respectively:
1) insulation properties between the source side (i.e., the collector bar) and the DC/DC converter housing;
2) the insulation performance between the secondary side of the DC/DC converter and the shell of the DC/DC converter;
3) insulation between the source side (i.e., the collector bar) and the vehicle body;
4) insulation between the source side (i.e. the collector bar) and the secondary side of the DC/DC converter;
5) insulation performance between a casing of the DC/DC converter and a vehicle body;
the detection scheme can detect the insulation conditions of the source side (namely the collector bar) and the vehicle body only by an insulation detector under the condition that primary insulation, secondary insulation and tertiary insulation of the collector frame are all failed, but the detection result is delayed at the moment, so that potential safety hazards exist.
Fig. 2 is a schematic diagram of a connection line of a monitoring system adopted in the prior art. The cable comprises a conductor layer L0-1, an inner insulating layer L0-2, an outer insulating layer L0-3 and an outer shell layer L0-4 which are sequentially arranged from inside to outside in the radial direction.
Fig. 3-6 show a monitoring system for improving the insulation performance of an isolated double-source trolley bus provided by the invention.
The specific technical scheme is as follows:
a lifting isolation type double-source trolley bus insulation monitoring system comprises a wire mesh 1, a trolley pole 2, an insulation shaft sleeve 3, a trolley frame 4, a trolley frame bottom plate 5, a first insulator 6, a cross beam 7, a second insulator 8, a DC/DC converter 9, a motor controller 10, a high-voltage battery 11, a whole vehicle controller 12 and a vehicle body 13; the electric energy collecting device comprises a vehicle body 13, a cross beam 7, a collecting frame bottom plate 5, a collecting frame 4, a first insulator 6, a second insulator 8, a DC/DC converter 9, a motor controller 10, a high-voltage battery 11 and a vehicle controller 10, wherein the collecting frame bottom plate 5 is supported on one side of the top of the vehicle body 13 through the cross beam 7, the collecting frame 4 is fixedly arranged on the top of the collecting frame bottom plate 5, the top of the collecting frame 4 is connected with the bottom of a collecting pole 2 through an insulating shaft sleeve 3, the top of the collecting pole 2 is in contact with a wire mesh 1 to obtain electric energy, the first insulator 6 is arranged between the bottom of the collecting frame bottom plate 5 and the top of the cross beam 7, the second insulator 8 is arranged between the bottom of the cross beam 7 and the top of the vehicle body 13, the other side;
a connecting line L with an electromagnetic shielding layer L1-3 is connected between the collector frame 4 and the DC/DC converter 9, and two ends of the electromagnetic shielding layer L1-3 of the connecting line L are respectively connected with the collector frame bottom plate 5 and the shell 9-1 of the DC/DC converter 9; therefore, the bottom plate of the collector frame and the shell of the DC/DC converter are at the same potential; when the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, the insulation performance of the trolley pole, the DC/DC converter shell and the base plate of the collecting rack is detected, which is equivalent to that only the primary insulation of the collecting rack is detected, when the primary insulation of the collecting rack system fails, the primary insulation can be found in advance, corresponding inspection and maintenance are carried out, and the safety performance is greatly improved.
Specifically, the connecting wire L sequentially comprises a conductor layer L1-1, an insulating layer L1-2, an electromagnetic shielding layer L1-3, a torsion protection layer L1-4 and a shell layer L1-5 from inside to outside in the radial direction, the conductor layer is used for achieving signal transmission between the collector frame 4 and the DC/DC converter 9, the insulating layer effectively achieves separation between the conductor layer L1-1 and the electromagnetic shielding layer L1-3 to avoid mutual interference, the torsion protection layer L1-4 effectively enhances the strength of the torsion protection layer during bending, and the shell layer L1-5 achieves effective protection of an internal structure.
Specifically, the thickness of the torsion protection layer L1-4 is greater than that of the insulation layer L1-2, so that the strength of the torsion protection layer is enhanced when the torsion protection layer L1-2 is twisted and bent, the thickness of the insulation layer L1-2 is greater than that of the electromagnetic shielding layer L1-3, and the thickness of the insulation layer L1-2 is greater than that of the shell layer L1-5, so that the conductor layer L1-1 and the electromagnetic shielding layer L1-3 are separated by the greater thickness, and mutual interference is avoided.
Specifically, the collector frame 4 is located at the top center position of the collector frame bottom plate 5, and a distance for connecting the electromagnetic shielding layer L1-3 of the connecting line L exists between the outer edge of the collector frame 4 and the outer edge of the collector frame bottom plate 5, so that connection between one end of the electromagnetic shielding layer L1-3 and the collector frame bottom plate 5 is facilitated.
Specifically, the crossbeam 7 is provided with a plurality ofly, and evenly distributed is in collecting rack bottom plate 5's bottom position all around to realize the even support and the insulating effect to collecting rack bottom plate 5.
Specifically, the invention discloses a method for monitoring insulation of a lifting isolation type double-source trolley bus, which is characterized by comprising the following steps: the method comprises the following steps:
1) replacing the connecting line L connecting the DC/DC converter 9 and the current collecting rack 4 with the connecting line L with the electromagnetic shielding layer L1-3;
2) two ends of the electromagnetic shielding layer L1-3 are respectively connected to the shell 9-1 of the DC/DC converter 9 and the collector frame bottom plate 5, so that the collector frame bottom plate 5 and the shell 9-1 of the DC/DC converter 9 are at the same potential;
3) the insulation performance of the trolley pole 2, the shell 9-1 of the DC/DC converter 9 and the insulation performance of the collector frame bottom plate 5 can be detected by detecting the insulation performance of the trolley pole 2 and the shell 9-1 of the DC/DC converter 9 through an insulation detector; therefore, the bottom plate of the collector frame and the shell of the DC/DC converter are at the same potential; when the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, the insulation performance of the trolley pole, the DC/DC converter shell and the base plate of the collecting rack is detected, which is equivalent to that only the primary insulation of the collecting rack is detected, when the primary insulation of the collecting rack system fails, the primary insulation can be found in advance, corresponding inspection and maintenance are carried out, and the safety performance is greatly improved.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A monitoring system for improving the insulating property of an isolated double-source trolley bus comprises a collector frame (4), a collector frame bottom plate (5), a DC/DC converter (9) and a trolley body (13); wherein, a collector frame bottom plate (5) is supported on one side of the top of the vehicle body (13) through a cross beam (7), a collector frame (4) is fixedly arranged on the top of the collector frame bottom plate (5), and a DC/DC converter (9) is fixedly arranged on the other side of the top of the vehicle body (13);
the method is characterized in that: a connecting line (L) with an electromagnetic shielding layer (L1-3) is connected between the collector frame (4) and the DC/DC converter (9), and two ends of the electromagnetic shielding layer (L1-3) of the connecting line (L) are respectively connected with a collector frame bottom plate (5) and a shell (9-1) of the DC/DC converter (9).
2. The monitoring system for improving the insulation performance of the isolated double-source trolley bus according to claim 1, wherein: the connecting wire (L) comprises a conductor layer (L1-1), an insulating layer (L1-2), an electromagnetic shielding layer (L1-3), a torsion protective layer (L1-4) and an outer shell layer (L1-5) from inside to outside in sequence in the radial direction.
3. The monitoring system for improving the insulation performance of the isolated double-source trolley bus according to claim 2, wherein: the thickness of the torsion protection layer (L1-4) is larger than that of the insulation layer (L1-2), the thickness of the insulation layer (L1-2) is larger than that of the electromagnetic shielding layer (L1-3), and the thickness of the insulation layer (L1-2) is larger than that of the shell layer (L1-5).
4. The monitoring system for improving the insulation performance of the isolated double-source trolley bus according to claim 1, wherein: the collector frame (4) is located at the center of the top of the collector frame bottom plate (5), and a distance for connecting an electromagnetic shielding layer (L1-3) of the connecting line (L) exists between the outer edge of the collector frame (4) and the outer edge of the collector frame bottom plate (5).
5. A monitoring system for lifting insulation performance of an isolated double-source trolley bus according to any one of claims 1 to 4, wherein: the cross beams (7) are arranged in a plurality and are uniformly distributed on the periphery of the bottom of the collector frame bottom plate (5).
6. A monitoring system for lifting insulation performance of an isolated double-source trolley bus according to any one of claims 1 to 4, wherein: the monitoring system further comprises a first insulator (6), a cross beam (7) and a second insulator (8); the first insulator (6) is arranged between the bottom of the collector frame bottom plate (5) and the top of the cross beam (7), and the second insulator (8) is arranged between the bottom of the cross beam (7) and the top of the vehicle body (13).
7. A monitoring method for improving insulating property of an isolated double-source trolley bus is characterized by comprising the following steps: the method comprises the following steps:
1) replacing a connecting line (L) connecting the DC/DC converter (9) and the power collecting frame (4) with a connecting line (L) with an electromagnetic shielding layer (L1-3);
2) two ends of the electromagnetic shielding layer (L1-3) are respectively connected to a shell (9-1) of the DC/DC converter (9) and a collector frame bottom plate (5), so that the collector frame bottom plate (5) and the shell (9-1) of the DC/DC converter (9) are at the same potential;
3) the insulation performance of the trolley pole (2), the shell (9-1) of the DC/DC converter (9) and the insulation performance of the power collection frame bottom plate (5) can be detected by detecting the insulation performance of the trolley pole (2) and the shell (9-1) of the DC/DC converter (9) through an insulation detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264679.7A CN112485612B (en) | 2020-11-13 | 2020-11-13 | Monitoring system and method for improving insulation performance of isolated double-source trolley bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264679.7A CN112485612B (en) | 2020-11-13 | 2020-11-13 | Monitoring system and method for improving insulation performance of isolated double-source trolley bus |
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| Publication Number | Publication Date |
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| CN112485612A true CN112485612A (en) | 2021-03-12 |
| CN112485612B CN112485612B (en) | 2024-06-14 |
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| CN202011264679.7A Active CN112485612B (en) | 2020-11-13 | 2020-11-13 | Monitoring system and method for improving insulation performance of isolated double-source trolley bus |
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| CN112485612B (en) | 2024-06-14 |
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