CN112485612B - Monitoring system and method for improving insulation performance of isolated double-source trolley bus - Google Patents
Monitoring system and method for improving insulation performance of isolated double-source trolley bus Download PDFInfo
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- CN112485612B CN112485612B CN202011264679.7A CN202011264679A CN112485612B CN 112485612 B CN112485612 B CN 112485612B CN 202011264679 A CN202011264679 A CN 202011264679A CN 112485612 B CN112485612 B CN 112485612B
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- 238000009413 insulation Methods 0.000 title claims abstract description 97
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000012212 insulator Substances 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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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
-
- 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 insulation performance of an isolated double-source trolley bus, comprising a wire net, a trolley pole, an insulating shaft sleeve, a current collecting 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 wire net is arranged on the wire net; connecting the DC/DC converter with the collector frame by adopting a connecting wire with an electromagnetic shielding layer, and respectively connecting two ends of the electromagnetic shielding layer to the shell of the DC/DC converter and the collector frame bottom plate to enable the collector frame bottom plate and the shell of the DC/DC converter to be at the same potential; the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, and then the insulation performance of the trolley pole, the DC/DC converter shell and the collector frame bottom plate is detected, and only the primary insulation of the collector frame is detected, so that the collector frame system can be found in advance when the primary insulation of the collector frame system fails, and accordingly, the collector frame system can be inspected and maintained correspondingly, 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 method for improving insulation performance of an isolated double-source trolley bus.
Background
In the prior art, three-level insulation is adopted between a collector frame system and a vehicle body of a novel double-source trolley bus system. The novel double-source trolley bus system collects electric energy of a wire net through a trolley pole and achieves an insulation function with an actuating mechanism large bottom plate of the collector frame through an insulation shaft sleeve, and the electric energy is primary insulation of the collector frame system; two cross beams are added below the large bottom plate of the actuating mechanism of the collector frame to support the large bottom plate of the collector frame, and two-stage insulation of a collector system is realized by supporting and fixing the cross beams and the large bottom plate through insulators; and meanwhile, the cross beam and the vehicle body of the system of the current collecting frame are insulated in three stages through insulators.
Three-level insulation is realized between the collector rack system of the novel double-source trolley bus system and the vehicle body in a physical isolation mode. But only when the insulation of the primary, secondary and tertiary insulation is completely invalid, the insulation detection system of the novel double-source trolley bus system can detect the insulation condition of the wire net and the vehicle body. When primary insulation and secondary insulation fail, and when primary insulation is not failed, the insulation detection system of the whole vehicle cannot detect, but the vehicle can normally operate at the moment, so that the risk of whole vehicle insulation is greatly increased, and the personal safety of passengers and the safety of other electrical equipment are threatened.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a monitoring system and a method for improving the insulation performance of an isolated double-source trolley bus.
The technical scheme of the invention is as follows: a monitoring system for improving insulation performance 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 vehicle body (13); the power collecting device comprises a power collecting frame, a power collecting frame base plate (5), a power collecting frame (4), a DC/DC converter (9) and a power collecting frame, wherein the power collecting frame base plate (5) is supported on one side of the top of a vehicle body (13) through a cross beam (7), and the power collecting frame (4) is fixedly arranged on the top of the power collecting frame base plate (5), and the DC/DC converter (9) is fixedly arranged on the other side of the top of the vehicle body (13); connecting wires (L) with electromagnetic shielding layers (L1-3) are connected between the current collecting frame (4) and the DC/DC converter (9), and two ends of the electromagnetic shielding layers (L1-3) of the connecting wires (L) are respectively connected with a current collecting frame bottom plate (5) and a shell (9-1) of the DC/DC converter (9).
Further, the connecting line (L) 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 sequence.
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 outer shell layer (L1-5).
Further, the collector frame (4) is located at the top center of the collector frame bottom plate (5), and a distance between the outer edge of the collector frame (4) and the outer edge of the collector frame bottom plate (5) is provided for connecting the electromagnetic shielding layers (L1-3) of the connecting lines (L).
Further, the cross beams (7) are arranged in a plurality and uniformly distributed at the periphery of the bottom plate (5) of the current collecting frame.
Further, the monitoring system also comprises a first insulator (6), a cross beam (7) and a second insulator (8); the electric power collecting device is characterized in that a first insulator (6) is arranged between the bottom of the bottom plate (5) of the electric power collecting frame and the top of the cross beam (7), and a second insulator (8) is arranged between the bottom of the cross beam (7) and the top of the vehicle body (13).
Further, a monitoring method for improving insulation performance of an isolated double-source trolley bus is also provided, which is characterized in that: the method comprises the following steps:
1) Replacing the connection line (L) connecting the DC/DC converter (9) and the collector frame (4) with a connection line (L) with electromagnetic shielding layers (L1-3);
2) Two ends of an electromagnetic shielding layer (L1-3) are respectively connected to a shell (9-1) of a DC/DC converter (9) and a collector frame base plate (5), so that the collector frame base 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 shell (9-1) of the trolley pole (2) and the DC/DC converter (9) through the 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 wire of the DC/DC converter and the current collecting frame adopts the connecting wire with the electromagnetic shielding layer, and two ends of the electromagnetic shielding layer 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; the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, and becomes the insulation performance of the trolley pole, the DC/DC converter shell and the collector frame bottom plate, which is equivalent to detecting only the primary insulation of the collector frame, and the collector frame system can be found in advance when the primary insulation fails, so that the corresponding inspection and maintenance can be performed, 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 according to the present application;
FIG. 4 is a schematic structural view of a connecting wire according to the present application;
FIG. 5 is a schematic view of the installation of the connection wire provided by the present application;
Fig. 6 is a structural cross-sectional view of the connection wire provided by the present application.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present patent.
Fig. 1 is a schematic structural diagram of a monitoring system for improving insulation performance of an isolated double-source trolley bus in the prior art; the specific scheme is as follows: the device comprises a wire net 1, a trolley pole 2, an insulating shaft sleeve 3, a collector frame 4, a collector 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; wherein, a collector frame bottom plate 5 is supported through crossbeam 7 in automobile body 13 top one side, collector frame bottom plate 5's top is fixed to be provided with collector frame 4, collector frame 4's top is connected with collector bar 2's bottom through insulating sleeve 3, collector bar 2's top is contacted with wire net 1 in order to obtain the electric energy, be provided with first insulator 6 between collector frame bottom plate 5 bottom and crossbeam 7's the top, be provided with second insulator 8 between crossbeam 7's bottom and automobile body 13's the top, automobile body 13 top opposite side is fixed to be provided with DC/DC converter 9, DC/DC converter 9 is connected with the motor controller 10 electricity that sets up with automobile body 13 inside, high-voltage battery 11 that sets up in automobile body 13 is connected with motor controller 10 in order to provide the electric energy for it, whole car controller 12 sets up inside automobile body 13.
Three-stage insulation is adopted between the collector frame 4 and the vehicle body 13 of the double-source trolley bus:
1) The double-source trolley bus collects electric energy of the wire net 1 through the trolley pole 2 and realizes an insulation function with the trolley frame bottom plate 5 through the insulation shaft sleeve 3, namely primary insulation between the trolley frame 4 and the vehicle body 13;
2) Two cross beams 7 are added under 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) Three-level insulation is realized between the cross beam 7 and the vehicle body 13 through the second insulator 8.
Three-level insulation is realized between the collector frame 4 and the vehicle body 13 of the double-source trolley bus in a physical isolation mode. However, the insulation detection system of the double-source trolley bus can only detect the failure condition by detecting the insulation condition of the wire net and the vehicle body under the condition that the primary insulation, the secondary insulation and the tertiary insulation are all failed. When primary insulation and secondary insulation fail, the insulation detection system of the whole vehicle cannot detect, but the vehicle can normally operate at the moment, so that the risk of whole vehicle insulation is greatly increased, and the personal safety of 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 trolley pole) and the housing of the DC/DC converter;
2) Insulation properties between the secondary side of the DC/DC converter and the housing of the DC/DC converter;
3) Insulation properties between the source side (i.e., trolley pole) and the vehicle body;
4) Insulation properties between the source side (i.e., the trolley pole) and the secondary side of the DC/DC converter;
5) Insulation performance between the housing of the DC/DC converter and the vehicle body;
the detection scheme can only detect the insulation condition of the source side (namely the trolley pole) and the vehicle body through the insulation detector under the condition that the primary insulation, the secondary insulation and the tertiary insulation of the current collecting frame are all invalid, but the detection result is lagged, and potential safety hazards exist.
Fig. 2 is a schematic structural diagram of the connection lines of the monitoring system used 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 insulation performance of an isolated double-source trolley bus.
The specific technical scheme is as follows:
An insulation monitoring system of a lifting isolation type double-source trolley bus comprises a wire net 1, a trolley pole 2, an insulation shaft sleeve 3, a current collecting frame 4, a current collecting 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-bus controller 12 and a bus body 13; the electric power generation device comprises a vehicle body 13, a power collecting frame bottom plate 5, a power collecting frame 4, an insulating shaft sleeve 3, a wire net 1, a first insulator 6, a second insulator 8, a DC/DC converter 9, a motor controller 10, a high-voltage battery 11, a motor controller 10, a vehicle controller 12 and a vehicle body 13, wherein the power collecting frame bottom plate 5 is supported on one side of the top of the vehicle body 13 through the cross beam 7, the power collecting frame 4 is fixedly arranged on the top of the power collecting frame bottom plate 5, the top of the power collecting frame 4 is connected with the bottom of the power collecting rod 2 through the insulating shaft sleeve 3, the top of the power collecting rod 2 is contacted with the wire net 1 to obtain electric power, the first insulator 6 is arranged between the bottom of the power 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 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 the motor controller 10, the motor controller 10 and the high-voltage battery 11 arranged in the vehicle 13 are electrically connected to provide electric power for the motor controller 10 and the motor controller 10;
A connecting line L with an electromagnetic shielding layer L1-3 is connected between the current collecting 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 current collecting frame bottom plate 5 and a shell 9-1 of the DC/DC converter 9; so that the collector frame bottom plate and the shell of the DC/DC converter are at the same potential; the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, and becomes the insulation performance of the trolley pole, the DC/DC converter shell and the collector frame bottom plate, which is equivalent to detecting only the primary insulation of the collector frame, and the collector frame system can be found in advance when the primary insulation fails, so that the corresponding inspection and maintenance can be performed, and the safety performance is greatly improved.
Specifically, the radial direction of the connecting line 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, wherein the conductor layer is used for realizing signal transmission between the current collecting frame 4 and the DC/DC converter 9, the insulating layer effectively realizes that the separation between the conductor layer L1-1 and the electromagnetic shielding layer L1-3 avoids mutual interference, the torsion protection layer L1-4 effectively enhances the strength of the torsion protection layer L1-4 during torsion bending, and the shell layer L1-5 realizes effective protection of an internal structure.
Specifically, the thickness of the torsion protection layer L1-4 is larger than that of the insulation layer L1-2, the strength of the torsion protection layer is enhanced when the torsion protection layer is twisted and bent by a larger thickness, 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 outer shell layer L1-5, so that the separation between the conductor layer L1-1 and the electromagnetic shielding layer L1-3 is realized by a larger thickness, and mutual interference is avoided.
Specifically, the current collecting frame 4 is located at the top center of the current collecting frame bottom plate 5, and a space for connecting the electromagnetic shielding layer L1-3 of the connecting line L is provided between the outer edge of the current collecting frame 4 and the outer edge of the current collecting frame bottom plate 5, so that one end of the electromagnetic shielding layer L1-3 is connected with the current collecting frame bottom plate 5 conveniently.
Specifically, the cross beams 7 are provided in a plurality and uniformly distributed at the periphery of the bottom plate 5 of the current collecting frame, so that uniform supporting and insulating effects on the bottom plate 5 of the current collecting frame are achieved.
Specifically, the invention provides a lifting isolation type double-source trolley bus insulation monitoring method, which is characterized by comprising the following steps of: the method comprises the following steps:
1) Replacing the connection line L connecting the DC/DC converter 9 and the collector frame 4 with a connection line L having electromagnetic shield layers 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 in the same potential;
3) The insulation performance of the trolley pole 2, the shell 9-1 of the DC/DC converter 9 and the current collector frame bottom plate 5 can be detected by detecting the insulation performance of the shell 9-1 of the trolley pole 2 and the DC/DC converter 9 through an insulation detector; so that the collector frame bottom plate and the shell of the DC/DC converter are at the same potential; the insulation detector detects the insulation performance of the trolley pole and the DC/DC converter shell, and becomes the insulation performance of the trolley pole, the DC/DC converter shell and the collector frame bottom plate, which is equivalent to detecting only the primary insulation of the collector frame, and the collector frame system can be found in advance when the primary insulation fails, so that the corresponding inspection and maintenance can be performed, and the safety performance is greatly improved.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. A monitoring system for improving insulation performance 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 vehicle body (13); the power collecting device comprises a power collecting frame, a power collecting frame base plate (5), a power collecting frame (4), a DC/DC converter (9) and a power collecting frame, wherein the power collecting frame base plate (5) is supported on one side of the top of a vehicle body (13) through a cross beam (7), and the power collecting frame (4) is fixedly arranged on the top of the power collecting frame base plate (5), and the 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 wire (L) with an electromagnetic shielding layer (L1-3) is connected between the current collecting frame (4) and the DC/DC converter (9), and two ends of the electromagnetic shielding layer (L1-3) of the connecting wire (L) are respectively connected with a current collecting frame bottom plate (5) and a shell (9-1) of the DC/DC converter (9);
The radial direction of the connecting line (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;
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 outer shell layer (L1-5);
The collector frame (4) is positioned at the top center of the collector frame bottom plate (5), and a distance for connecting an electromagnetic shielding layer (L1-3) of the connecting line (L) is reserved between the outer edge of the collector frame (4) and the outer edge of the collector frame bottom plate (5);
The monitoring system further comprises a first insulator (6), a cross beam (7) and a second insulator (8); the electric power collecting device is characterized in that a first insulator (6) is arranged between the bottom of the bottom plate (5) of the electric power collecting frame and the top of the cross beam (7), and a second insulator (8) is arranged between the bottom of the cross beam (7) and the top of the vehicle body (13).
2. The monitoring system for improving insulation performance of isolated double-source trolley bus as claimed in claim 1, wherein: the cross beams (7) are arranged in a plurality and uniformly distributed at the periphery of the bottom plate (5) of the current collecting frame.
3. A monitoring method of a monitoring system for improving insulation performance of an isolated double-source trolley bus according to any one of claims 1-2, characterized by: the method comprises the following steps:
1) Replacing the connection line (L) connecting the DC/DC converter (9) and the collector frame (4) with a connection line (L) with electromagnetic shielding layers (L1-3);
2) Two ends of an electromagnetic shielding layer (L1-3) are respectively connected to a shell (9-1) of a DC/DC converter (9) and a collector frame base plate (5), so that the collector frame base 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 shell (9-1) of the trolley pole (2) and the DC/DC converter (9) through the 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN112485612A CN112485612A (en) | 2021-03-12 |
| CN112485612B true 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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| DE102013226356A1 (en) * | 2013-10-02 | 2015-04-02 | Scania Cv Ab | vehicle |
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| CN101807449A (en) * | 2009-02-13 | 2010-08-18 | 矢崎总业株式会社 | Shielding conductor |
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