CN108528222B - System and method for providing power supply source of contact net - Google Patents
System and method for providing power supply source of contact net Download PDFInfo
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- CN108528222B CN108528222B CN201810609759.8A CN201810609759A CN108528222B CN 108528222 B CN108528222 B CN 108528222B CN 201810609759 A CN201810609759 A CN 201810609759A CN 108528222 B CN108528222 B CN 108528222B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/22—Supporting means for the contact bow
- B60L5/28—Devices for lifting and resetting the collector
- B60L5/32—Devices for lifting and resetting the collector using fluid pressure
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- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a system and a method for providing an air source of a power supply of a contact net, which are used for providing an air source for a pantograph and a high-voltage switch, wherein the system comprises: the device comprises a direct current air compressor station, a first air cylinder and a first pressure regulating valve which are connected in sequence, wherein an air source generated by the direct current air compressor station is output to the first air cylinder and then passes through the first pressure regulating valve to provide an air source for a pantograph and a high-voltage switch; the air source generated by the alternating current air compressor station is output to the second air cylinder and then passes through the second air regulating valve to provide an air source for the pantograph and the high-voltage switch. The first air cylinder and the second air cylinder are used for storing compressed air, and the first pressure regulating valve and the second pressure regulating valve are used for regulating the pressure of an output air source. The invention can solve the technical problem that the direct current air compressor and the alternating current air compressor provide stable and reliable air sources for the pantograph.
Description
Technical Field
The invention relates to the field of railway electricity, in particular to a system and a method for providing a power supply source of a contact net applied to a railway engineering operation vehicle.
Background
At present, along with the continuous increase of the total mileage of the railway in China, the railway maintenance workload is also increased, the large-scale road maintenance machinery becomes the main force of the railway maintenance in China, and dozens of mechanized construction teams are active on the ten thousand-in railway lines every day. The construction teams are operated in the field throughout the year, and the construction teams are cold in war and hot in bucket, thus greatly contributing to the development of railway industry in China, and particularly to the acceleration of railways in recent years. In order to solve the living problem of railway maintenance crews in the field, each road bureau is provided with a camping train with a mechanized construction operation function for the crews. These camping trains are modified based on passenger train models and are provided with facilities such as sleeping berths, kitchens and restaurants. In the prior art, CN205890886U, CN106080625A, CN202389375U, CN101386305B, CN201712613U, CN201283866Y, CN101386305a et al patents all present the structure of such a camping train.
The camping train of the mechanized construction team generally takes electricity from a stop station along the way, and is responsible for a hydropower section, the time for stopping the camping train at each station is very short, and the hydropower section must frequently get to the construction team to receive electricity. The stations along the way are small stations, the capacity of transformers on the small stations is small, and large-capacity electric energy cannot be provided for the camping train, so that the camping train is provided with a self-contained diesel generator set. Diesel-electric power sets are commonly used to supply power to camping trains for many times, particularly in summer and winter when air conditioning is used. The diesel generator set consumes a large amount of diesel oil, and causes serious pollution to the environment, and noise generated by the generator set also causes interference to constructors and surrounding residents. In addition, the capacity of the diesel generating set is not large, and many electric equipment on the vehicle such as an electromagnetic oven, an electric shower, a refrigerator and the like cannot be used. However, the mileage of the railway electrification in China is increased at a very high speed every year, all main trunks are electrified basically, and the electrified railway will become more and more in the future, if a set of system capable of directly taking electricity from a contact net is arranged on a mechanized construction camping train which is operated frequently in an electrified section, the camping train can obtain high-capacity electric energy from the contact net no matter where the camping train is stopped, so that the trouble of frequent power connection of a water and electricity section is avoided, and various defects of a diesel generator set are fundamentally solved.
At present, in order to solve the technical problem of power consumption of a camping train, the camping train is generally provided with a contact net power supply to convert the contact net voltage into a civil three-phase four-wire system voltage. The contact net power supply depends on the current flowing from the contact net by the pantograph, and ensuring reliable operation of the pantograph is a key of normal power supply, so that the pantograph needs a reliable and stable air source supply to continuously and stably operate the pantograph. The contact net power supply uses the pantograph of gasbag formula structure, and this kind of pantograph needs to be continuously discharged to guarantee the constancy of pantograph and contact net contact force. The electric locomotive pantograph uses a direct current air compressor as an air source for primary pantograph lifting, and after successful current receiving, the locomotive works by a high-power alternating current brake air compressor and starts to provide the air source for the pantograph. The direct current air compressor relies on direct current motor to be power, and direct current motor needs the carbon brush switching-over, needs frequently to detect the carbon brush when long-time continuous operation, if the carbon brush wearing and tearing are after limiting, must in time change the carbon brush, so direct current motor is not suitable for long-time continuous operation. The air source is not needed to be provided for braking under the static condition, so that the air source can not be provided for the pantograph by using the braking air compressor.
Therefore, research on a system and a method for providing a power supply air source of a contact net, and providing a stable and reliable air source for a pantograph during operation of a railway construction camping train become the technical problem to be solved urgently at present.
Disclosure of Invention
In view of the above, the invention aims to provide a system and a method for providing a power supply air source of a contact net so as to solve the technical problem that a direct current air compressor and an alternating current air compressor provide stable and reliable air sources for a pantograph.
In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a method for providing a power supply air source of a catenary, a system for providing an air source for a pantograph and a high-voltage switch, including:
the device comprises a direct current air compressor station, a first air cylinder and a first pressure regulating valve which are connected in sequence, wherein an air source generated by the direct current air compressor station is output to the first air cylinder, and then the air source is provided for the pantograph and the high-voltage switch after passing through the first pressure regulating valve;
the air source generated by the alternating current air compressor station is output to the second air cylinder, and then the air source is provided for the pantograph and the high-voltage switch after passing through the second pressure regulating valve;
the first air cylinder and the second air cylinder are used for storing compressed air, and the first pressure regulating valve and the second pressure regulating valve are used for regulating the pressure of an output air source.
Preferably, the air source supply system further comprises a first stop valve arranged between the first pressure regulating valve and the air source outlet, and a second stop valve arranged between the second pressure regulating valve and the air source outlet, wherein the first stop valve and the second stop valve are used for stopping the air passage, and the rear end pipeline is convenient to overhaul.
Preferably, a first air pressure switch is further arranged on a pipeline connected with the first air cylinder of the direct current air compressor station, and the first air pressure switch can automatically control the starting and stopping of the direct current air compressor station according to the air pressure in the first air cylinder.
Preferably, a second air pressure switch is further arranged on a pipeline connected with the second air cylinder of the alternating current air compressor station, and the second air pressure switch can automatically control the starting and stopping of the alternating current air compressor station according to the air pressure in the second air cylinder.
Preferably, the direct current air compressor station and the alternating current air compressor station are mutually independent components.
Preferably, the air circuit output by the direct current air compressor station is connected with the air circuit output by the alternating current air compressor station in parallel to provide an air source for the pantograph and the high-voltage switch.
Preferably, the automatic starting air pressure of the direct current air compressor station is lower than the automatic starting air pressure of the alternating current air compressor station, so that the combined control of the direct current air compressor station and the alternating current air compressor station is realized, and a stable air source is provided for the pantograph and the high-voltage switch.
Preferably, the air source supply system further comprises a storage battery for supplying direct current power to the direct current air compressor station, and three-phase alternating current supplies alternating current power to the alternating current air compressor station.
The invention also specifically provides a technical implementation scheme of a contact network power supply air source providing method based on the system, which comprises the following steps:
s101) before no three-phase alternating current provides alternating current power for an alternating current air compressor station, the direct current air compressor station obtains direct current power from a storage battery and provides air sources for a pantograph and a high-voltage switch after passing through a first air cylinder, a first pressure regulating valve and a first stop valve which are connected in sequence;
s102) when three-phase alternating current supplies alternating current power for an alternating current air compressor station, the alternating current air compressor station supplies air sources for the pantograph and the high-voltage switch after passing through a second air cylinder, a second pressure regulating valve and a second stop valve which are sequentially connected, and the direct current air compressor station does not work at the moment;
s103) when three-phase alternating current is used for providing alternating current power for the alternating current air compressor station, if the alternating current air compressor station fails, the direct current air compressor station automatically provides air sources for the pantograph and the high-voltage switch.
Preferably, the first air pressure switch detects air pressure of the first air cylinder, and the second air pressure switch detects air pressure of the second air cylinder. The starting air pressure of the direct current air compressor station is set to be between 0.45 and 0.55Mpa through the first air pressure switch, the starting air pressure of the alternating current air compressor station is set to be between 0.5 and 0.65Mpa through the second air pressure switch, and the automatic starting air pressure of the direct current air compressor station is lower than the automatic starting air pressure of the alternating current air compressor station.
By implementing the technical scheme of the system and the method for providing the power supply source of the overhead line system, the invention has the following beneficial effects:
(1) According to the system and the method for providing the air source of the power supply of the overhead line system, the alternating current air compressor is introduced into the power supply of the overhead line system to provide the air source for the system, so that the reliability of air supply is improved, the detection and maintenance frequency of the direct current air compressor is reduced, and the service lives of the direct current air compressor and the storage battery are prolonged;
(2) The system and the method for providing the power supply air source of the overhead line system perform joint control on the alternating current air compressor and the direct current air compressor, and greatly reduce the failure rate of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the invention, from which other embodiments can be obtained for a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a gas circuit of a specific embodiment of a catenary power supply gas source providing system of the present invention;
fig. 2 is a schematic diagram of an external connection structure of the catenary power supply air source supply system of the present invention;
in the figure: the system comprises a 1-direct current air compressor station, a 2-alternating current air compressor station, a 3-first air pressure switch, a 4-second air pressure switch, a 5-first air cylinder, a 6-second air cylinder, a 7-first pressure regulating valve, an 8-first stop valve, a 9-second pressure regulating valve, a 10-second stop valve, a 11-one-way valve, a 12-pantograph, a 13-high pressure switch, a 14-storage battery and a 100-air source providing system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and fig. 2, a specific embodiment of the system and method for providing a power source of a catenary power supply according to the present invention is provided, and the present invention is further described below with reference to the accompanying drawings and the specific embodiment.
Example 1
As shown in fig. 1 and fig. 2, an embodiment of a system for providing an air source for a power supply of a catenary is used for providing air sources for a pantograph 12 and a high-voltage switch 13, and specifically includes:
the direct current air compressor station 1, the first air cylinder 5 and the first pressure regulating valve 7 are sequentially connected, and an air source generated by the direct current air compressor station 1 is output to the first air cylinder 5 and then passes through the first pressure regulating valve 7 to provide an air source for the pantograph 12 and the high-voltage switch 13;
the alternating current air compressor station 2, the second air cylinder 6 and the second pressure regulating valve 9 are sequentially connected, and an air source generated by the alternating current air compressor station 2 is output to the second air cylinder 6 and then passes through the second pressure regulating valve 9 to provide an air source for the pantograph 12 and the high-voltage switch 13;
the first and second air cylinders 5 and 6 are used for storing compressed air, and the first and second pressure regulating valves 7 and 9 are used for regulating (rear end) output air source pressure.
The air source supply system 100 further comprises a first stop valve 8 arranged between the first pressure regulating valve 7 and the air source outlet A, and a second stop valve 10 arranged between the second pressure regulating valve 9 and the air source outlet A, wherein the first stop valve 8 and the second stop valve 10 are used for stopping an air path, so that the rear end pipeline is convenient to overhaul.
The direct current air compressor station 1 and the alternating current air compressor station 2 supply dry and clean compressed air. The first reservoir 5 and the second reservoir 6 are used for storing compressed air. The direct current air compressor station 1 and the alternating current air compressor station 2 output clean air after cooling and drying to the first air cylinder 5 and the second air cylinder 6, and supply air to the pantograph 12 and the high-voltage switch 13 after passing through the first pressure regulating valve 7, the second pressure regulating valve 9, the first stop valve 8 and the second stop valve 102 respectively.
The pipeline that the direct current air compressor station 1 is connected with the first air cylinder 5 is also provided with a first air pressure switch 3, and the first air pressure switch 3 can automatically control the starting and stopping of the direct current air compressor station 1 according to the air pressure in the first air cylinder 5. A second air pressure switch 4 is also arranged on a pipeline connected with the alternating current air compressor station 2 and the second air cylinder 6, and the second air pressure switch 4 can automatically control the starting and stopping of the alternating current air compressor station 2 according to the air pressure in the second air cylinder 6.
The direct current air compressor station 1 and the alternating current air compressor station 2 adopt separate structures, and the direct current air compressor station 1 and the alternating current air compressor station 2 are mutually independent components. The air circuit output by the direct current air compressor station 1 and the air circuit output by the alternating current air compressor station 2 are connected in parallel to provide an air source for the pantograph 12 and the high-voltage switch 13. In order to achieve the combined control of the direct current air compressor station 1 and the alternating current air compressor station 2, the automatic starting air pressure of the direct current air compressor station 1 is lower than the automatic starting air pressure of the alternating current air compressor station 2, so that the combined control of the direct current air compressor station 1 and the alternating current air compressor station 2 is realized, and a stable air source is provided for the pantograph 12 and the high-voltage switch 13. The air supply system 100 further comprises a battery 14 for supplying a direct current power to the direct current air compressor station 1, and three-phase alternating current supplies an alternating current power to the alternating current air compressor station 2.
The direct current air compressor station 1 relies on direct current motor as power, and direct current motor needs carbon brush switching-over, needs frequently to detect the carbon brush when long-time continuous operation, if the carbon brush wearing and tearing are after the limit, must in time change the carbon brush, so direct current motor is not suitable for long-time continuous operation. While pantograph 12 requires a reliable and stable supply of air to continue the stable operation of pantograph 12. Compared with a direct current motor, the three-phase alternating current motor has low failure rate and is maintenance-free, and is the optimal power selection. However, since ac power cannot be supplied until the pantograph 12 rises, the dc air compressor station 1 and the ac air compressor station 2 must be provided to supply air to the pantograph 12. The dc air compressor station 1 provides a source of air for the initial lifting of the pantograph 12 by powering the dc motor using the battery 14. When the current is normal, ac can be provided, a three-phase ac air compressor is used to provide a source of air for pantograph 12.
Example 2
The direct current air compressor station 1 and the alternating current air compressor station 2 work jointly to provide a stable air source for the power supply source air source supply system of the overhead contact system. An embodiment of a method for providing a power supply air source of a catenary based on the system of embodiment 1 specifically includes the following steps:
s101) before no three-phase alternating current provides alternating current power for the alternating current air compressor station 2, the direct current air compressor station 1 obtains direct current power from a storage battery 14 and provides air source for a pantograph 12 and a high-voltage switch 13 after passing through a first air cylinder 5, a first pressure regulating valve 7 and a first stop valve 8 which are connected in sequence;
s102) when three-phase alternating current (380V for example) is used for providing alternating current power for the alternating current air compressor station 2, the alternating current air compressor station 2 provides a gas source for the pantograph 12 and the high-voltage switch 13 after passing through the second air cylinder 6, the second pressure regulating valve 9 and the second stop valve 10 which are sequentially connected, and the direct current air compressor station 1 does not work at the moment;
s103) when there is a three-phase ac (e.g., 380V) power to the ac air compressor station 2, if the ac air compressor station 2 fails, the dc air compressor station 1 automatically supplies the air source to the pantograph 12 and the high voltage switch 13.
To satisfy the above logic, pressure switches (including the first air pressure switch 3 and the second air pressure switch 4) are provided at the dc air compressor station 1 and the ac air compressor station 2, respectively. Wherein the first air pressure switch 3 detects the air pressure of the first air cylinder 5, and the second air pressure switch 4 detects the air pressure of the second air cylinder 6. Meanwhile, the starting air pressure of the direct current air compressor station 1 is set to be between 0.45 and 0.55Mpa through the first air pressure switch 3, the starting air pressure of the alternating current air compressor station 2 is set to be between 0.5 and 0.65Mpa through the second air pressure switch 4, and the automatic starting air pressure of the direct current air compressor station 1 is lower than the automatic starting air pressure of the alternating current air compressor station 2.
By implementing the technical scheme of the system and the method for providing the power supply air source of the contact net power supply, which are described in the specific embodiment of the invention, the following technical effects can be achieved:
(1) According to the system and the method for providing the air source of the power supply source of the overhead line system, disclosed by the embodiment of the invention, the alternating-current air compressor is introduced into the power supply source of the overhead line system to provide the air source for the system, so that the reliability of air supply is improved, the detection and maintenance frequency of the direct-current air compressor is reduced, and the service lives of the direct-current air compressor and the storage battery are prolonged;
(2) The system and the method for providing the power supply air source of the overhead line system, which are described in the specific embodiment of the invention, carry out joint control on the alternating current air compressor and the direct current air compressor, thereby greatly reducing the failure rate of the system.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or equivalent embodiments using the method and technical solution disclosed above without departing from the spirit and technical solution of the present invention. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention, unless departing from the technical solution of the present invention.
Claims (4)
1. A catenary power supply air supply system for providing air supply for a pantograph (12) and a high-voltage switch (13), characterized by comprising:
the device comprises a direct current air compressor station (1), a first air cylinder (5) and a first pressure regulating valve (7) which are connected in sequence, wherein an air source generated by the direct current air compressor station (1) is output to the first air cylinder (5), and then the air source is provided for the pantograph (12) and the high-voltage switch (13) after passing through the first pressure regulating valve (7);
the air source generated by the alternating current air compressor station (2) is output to the second air cylinder (6), and then the air source is provided for the pantograph (12) and the high-voltage switch (13) after passing through the second air regulating valve (9);
the first air cylinder (5) and the second air cylinder (6) are used for storing compressed air, and the first pressure regulating valve (7) and the second pressure regulating valve (9) are used for regulating the pressure of an output air source;
a first air pressure switch (3) is further arranged on a pipeline connected with the first air cylinder (5) of the direct current air compressor station (1), and the first air pressure switch (3) can automatically control the starting and stopping of the direct current air compressor station (1) according to the air pressure in the first air cylinder (5);
a second air pressure switch (4) is further arranged on a pipeline connected with the alternating current air compressor station (2) and the second air cylinder (6), and the second air pressure switch (4) can automatically control the starting and stopping of the alternating current air compressor station (2) according to the air pressure in the second air cylinder (6);
the air circuit output by the direct current air compressor station (1) and the air circuit output by the alternating current air compressor station (2) are connected in parallel to provide an air source for the pantograph (12) and the high-voltage switch (13); the automatic starting air pressure of the direct current air compressor station (1) is lower than the automatic starting air pressure of the alternating current air compressor station (2), so that the combined control of the direct current air compressor station (1) and the alternating current air compressor station (2) is realized, and a stable air source is provided for the pantograph (12) and the high-voltage switch (13);
the air source supply system (100) further comprises a storage battery (14) for supplying direct current power to the direct current air compressor station (1), and three-phase alternating current supplies alternating current power to the alternating current air compressor station (2);
before no three-phase alternating current provides an alternating current power supply for an alternating current air compressor station (2), the direct current air compressor station (1) acquires a direct current power supply from a storage battery (14) and provides an air source for a pantograph (12) and a high-voltage switch (13) after passing through a first air cylinder (5), a first pressure regulating valve (7) and a first stop valve (8) which are connected in sequence; when three-phase alternating current is used for providing an alternating current power supply for the alternating current air compressor station (2), the alternating current air compressor station (2) provides an air source for the pantograph (12) and the high-voltage switch (13) after passing through the second air cylinder (6), the second pressure regulating valve (9) and the second stop valve (10) which are sequentially connected, and the direct current air compressor station (1) does not work at the moment; when three-phase alternating current is used for providing alternating current power for the alternating current air compressor station (2), if the alternating current air compressor station (2) fails, the direct current air compressor station (1) automatically provides an air source for the pantograph (12) and the high-voltage switch (13);
the first air pressure switch (3) detects the air pressure of the first air cylinder (5), and the second air pressure switch (4) detects the air pressure of the second air cylinder (6); the starting air pressure of the direct current air compressor station (1) is set to be between 0.45 and 0.55Mpa through the first air pressure switch (3), and the starting air pressure of the alternating current air compressor station (2) is set to be between 0.5 and 0.65Mpa through the second air pressure switch (4).
2. The catenary power supply air supply system according to claim 1, wherein: the air source supply system (100) further comprises a first stop valve (8) arranged between the first pressure regulating valve (7) and the air source outlet (A), and a second stop valve (10) arranged between the second pressure regulating valve (9) and the air source outlet (A), wherein the first stop valve (8) and the second stop valve (10) are used for stopping an air passage, and the rear end pipeline is convenient to overhaul.
3. The catenary power supply air supply system according to claim 1 or 2, wherein: the direct current air compressor station (1) and the alternating current air compressor station (2) are mutually independent components.
4. A catenary power supply air source providing method based on the system of any one of claims 1 to 3, comprising the steps of:
s101) before no three-phase alternating current provides an alternating current power supply for an alternating current air compressor station (2), the direct current air compressor station (1) acquires a direct current power supply from a storage battery (14) and provides an air source for a pantograph (12) and a high-voltage switch (13) after passing through a first air cylinder (5), a first pressure regulating valve (7) and a first stop valve (8) which are connected in sequence;
s102) when three-phase alternating current is used for providing an alternating current power supply for an alternating current air compressor station (2), the alternating current air compressor station (2) provides an air source for the pantograph (12) and the high-voltage switch (13) after passing through a second air cylinder (6), a second pressure regulating valve (9) and a second stop valve (10) which are sequentially connected, and at the moment, the direct current air compressor station (1) does not work;
s103) when three-phase alternating current is used for providing alternating current power for the alternating current air compressor station (2), if the alternating current air compressor station (2) fails, the direct current air compressor station (1) automatically provides an air source for the pantograph (12) and the high-voltage switch (13);
the first air pressure switch (3) detects the air pressure of the first air cylinder (5), and the second air pressure switch (4) detects the air pressure of the second air cylinder (6); the starting air pressure of the direct current air compressor station (1) is set to be between 0.45 and 0.55Mpa through the first air pressure switch (3), the starting air pressure of the alternating current air compressor station (2) is set to be between 0.5 and 0.65Mpa through the second air pressure switch (4), and the automatic starting air pressure of the direct current air compressor station (1) is lower than the automatic starting air pressure of the alternating current air compressor station (2).
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| CN201810609759.8A CN108528222B (en) | 2018-06-13 | 2018-06-13 | System and method for providing power supply source of contact net |
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| CN201810609759.8A CN108528222B (en) | 2018-06-13 | 2018-06-13 | System and method for providing power supply source of contact net |
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| CN104670027A (en) * | 2015-03-16 | 2015-06-03 | 南车株洲电力机车有限公司 | Locomotive pantograph-catenary pressure regulation system |
| CN106080208A (en) * | 2016-07-11 | 2016-11-09 | 安庆新景技电子科技有限公司 | Vehicle high-voltage isolation control circuit |
| CN206589704U (en) * | 2017-03-21 | 2017-10-27 | 中车株洲电力机车有限公司 | A kind of city rail vehicle rising bow electromagnetic valve work control system |
| CN207059788U (en) * | 2017-06-13 | 2018-03-02 | 湖南昊实科技发展有限公司 | A kind of AC and DC air compressor plant of railway engineering locomotive rising bow |
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