CN211790938U - Redundant power supply system of railway dormitory van - Google Patents
Redundant power supply system of railway dormitory van Download PDFInfo
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- CN211790938U CN211790938U CN202020584573.4U CN202020584573U CN211790938U CN 211790938 U CN211790938 U CN 211790938U CN 202020584573 U CN202020584573 U CN 202020584573U CN 211790938 U CN211790938 U CN 211790938U
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Abstract
The utility model discloses a redundant power supply system of a railway camper, which comprises a contact net power supply loop, a multi-path power supply loop and a multi-power supply switching unit; mutual redundancy among multiple power supply loops; the input end of each power supply loop is connected with the output end of the contact net power supply loop, and the output end of each power supply loop is connected with the multi-power supply switching unit; each power supply loop comprises a step-down transformer, a rectifying unit, an inversion control unit and a control power supply unit, wherein the step-down transformer, the rectifying unit and the inversion unit are sequentially connected, the input end of the inversion control unit is respectively connected with the rectifying unit and the control power supply unit, the output end of the inversion control unit is connected with the inversion unit, and the input end of the control power supply unit is connected with the inversion unit. The utility model has the advantages of simple structure, high power supply reliability and the like.
Description
Technical Field
The utility model mainly relates to the technical field of railway boarding car, in particular to a redundant power supply system of a railway boarding car.
Background
With the rapid development of railway construction, the work departments of the railway administration undertake line maintenance and repair, and need to carry out construction in the field for a long time, and the environment is hard and the conditions are severe. Constructors live on the dormitory van for a long time in order to conveniently operate, wherein life power supply is indispensable. Most of the dormitory cars are vehicles transformed by waste passenger cars, and the power supply mode mainly adopts a contact net for power supply. When the three-phase four-wire system AC380V power supply is used, the dormitory van obtains electric energy from a contact net through a pantograph on the roof of the dormitory van, and the three-phase four-wire system AC380V power supply is obtained through a step-down transformer, a train power supply module and a filter transformer in sequence. The power supply system of the dormitory car is in a working state for a long time, and when a certain device breaks down, the whole power supply system cannot be used. The current common emergency scheme adopts a diesel generator set to supply power in a centralized way, and the power supply mode has the defects of low efficiency, high noise, high cost and oil smoke pollution. In another scheme, the device with the same parameters is searched for help through a telephone or replaced, and the camping vehicle stops at a remote station, so that the waiting time for rescue is long, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in: to the technical problem that prior art exists, the utility model provides a redundant power supply system of railway dormitory car that simple structure, power supply reliability are high.
In order to solve the technical problem, the utility model provides a technical scheme does:
a redundant power supply system of a railway camper comprises a contact network power supply loop, a multi-path power supply loop and a multi-power supply switching unit; mutual redundancy among multiple power supply loops; the input end of each power supply circuit is connected with the output end of the contact net power supply circuit, and the output end of each power supply circuit is connected with the multi-power supply switching unit; each power supply loop comprises a step-down transformer, a rectifying unit, an inversion control unit and a control power supply unit, wherein the step-down transformer, the rectifying unit and the inversion unit are sequentially connected, the input end of the inversion control unit is respectively connected with the rectifying unit and the control power supply unit, the output end of the inversion control unit is connected with the inversion unit, and the input end of the control power supply unit is connected with the inversion unit.
As a further improvement of the above technical solution:
the power supply loop of the overhead line system comprises a pantograph, a main circuit breaker and a disconnecting switch, wherein the pantograph, the main circuit breaker and the disconnecting switch are sequentially connected.
The pantograph is a single-arm pantograph, the main circuit breaker is a vacuum circuit breaker, and the isolating switch is a single-pole double-throw electric isolating switch.
Each power supply loop further comprises a filtering unit, and the input end of the filtering unit is connected with the output end of the inversion unit.
The filtering unit comprises one or more of a filtering transformer, a filtering capacitor and an EMI filter.
The rectification unit is a single-phase bridge type uncontrollable rectification circuit, and the inversion unit is a three-phase bridge type fully-controlled inversion circuit.
The control power supply unit comprises a UPS module and a switching power supply, the input end of the UPS module is connected with the output end of the inversion unit, the output end of the UPS module is connected with the input end of the switching power supply, and the output end of the switching power supply is connected with the inversion control unit.
The number of the power supply loops is two, namely a 1# power supply loop and a 2# power supply loop.
The diesel engine power supply circuit comprises a diesel engine, a generator and a generator control unit, the diesel engine is connected with the generator, the output end of the generator is connected with the multi-power switching unit, the input end of the generator control unit is connected with the diesel engine, and the output end of the generator control unit is connected with the generator.
The charger power supply loop comprises a charger module, a storage battery pack and a charger control unit; the charger control unit is connected with the charger module; the input end of the charger module is connected with the output end of the inversion unit, the output end of the charger module is connected with the input end of the storage battery pack, and the output end of the storage battery pack is respectively connected with the charger control unit and the inversion control unit.
Compared with the prior art, the utility model has the advantages of:
in the redundant power supply system of the railway camper, the power supply loops are mutually standby, and the camper can supply power through one of the power supply loops under normal conditions; when a certain device in the power supply circuit breaks down, the other power supply circuit is started through the switching of the isolating switch and the multi-power switching unit, so that the normal life power consumption of workers is ensured, the time and cost for waiting for rescue are reduced, and the reliability of power supply is improved; in addition, a contact net is adopted for power supply, and the problem of energy consumption or noise pollution caused by long-time use or frequent use of a diesel generator set can be solved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention according to an embodiment of the present invention.
Fig. 2 is a flow chart of a method of the present invention in an embodiment.
The reference numbers in the figures denote: 1. a contact network power supply loop; 101. a pantograph; 102. a main circuit breaker; 103. an isolating switch; 2. 1# power supply loop; 201. 1# step-down transformer; 202. a 1# rectifying unit; 203. 1# inversion unit; 204. a 1# filtering unit; 205. 1# inversion control unit; 206. 1# switching power supply; 207. a # 1 UPS module; 3. a No. 2 power supply loop; 301. 2# step-down transformer; 302. a # 2 rectifying unit; 303. 2# inversion unit; 304. a 2# filtering unit; 305. 2# inversion control unit; 306. 2# switching power supply; 307. a # 2 UPS module; 4. a dual power switching unit.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments.
As shown in fig. 1, the redundant power supply system for the railway camper car of the present embodiment includes a catenary power supply circuit 1, a # 1 power supply circuit 2, a # 2 power supply circuit 3, and a multi-power switching unit, where the multi-power switching unit is a dual-power switching unit 4; the power supply loop 1 of the contact network comprises a pantograph 101, a main breaker 102 and a disconnecting switch 103, wherein the pantograph 101, the main breaker 102 and the disconnecting switch 103 are sequentially connected, the input end of the pantograph 101 is connected with the railway contact network, and the output end of the disconnecting switch 103 is respectively connected with the input ends of a power supply loop 2 of a power supply 1# and a power supply loop 3 of a power supply 2# and the power supply of a power supply 2# respectively;
specifically, the # 1 power supply circuit 2 includes a # 1 step-down transformer 201, a # 1 rectifying unit 202, a # 1 inverting unit 203, a # 1 filtering unit 204, a # 1 inverting control unit 205, and a # 1 control power supply unit, the 1# control power supply unit comprises a 1# switching power supply 206 and a 1# UPS module 207, a 1# step-down transformer 201, a 1# rectifying unit 202, a 1# inversion unit 203 and a 1# filtering unit 204 are sequentially connected, the output end of the 1# filtering unit 204 is respectively connected with the 1# UPS module 207 and the input end of the dual-power switching unit 4, the input end of the 1# inversion control unit 205 is respectively connected with the 1# rectifying unit 202 and the 1# switching power supply 206, the output end of the 1# inversion control unit 205 is connected with the 1# inversion unit 203, the input end of the 1# UPS module 207 is connected with the 1# filtering unit 204, and the output end of the 1# UPS module 207 is connected with the input end of the 1# switching power supply 206.
The # 2 power supply circuit 3 includes a # 2 step-down transformer 301, a # 2 rectifying unit 302, a # 2 inverting unit 303, a # 2 filtering unit 304, a # 2 inverting control unit 305 and a # 2 control power supply unit, the 2# control power supply unit comprises a 2# switching power supply 306 and a 2# UPS module 307, a 2# step-down transformer 301, a 2# rectifying unit 302, a 2# inversion unit 303 and a 2# filtering unit 304 are sequentially connected, the output end of the 2# filtering unit 304 is respectively connected with the 2# UPS module 307 and the input end of the dual-power switching unit 4, the input end of the 2# inversion control unit 305 is respectively connected with the 2# rectifying unit 302 and the 2# switching power supply 306, the output end of the 2# inversion control unit 305 is connected with the 2# inversion unit 303, the input end of the 2# UPS module 307 is connected with the 2# filtering unit 304, and the output end of the 2# UPS module 307 is connected with the input end of the 2# switching power supply 306.
The output of 1# power supply circuit 2 and the output of 2# power supply circuit 3 then all link to each other with dual power supply switching unit 4's input, and dual power supply switching unit 4's output then links to each other with the load on the dormitory car. Of course, in other embodiments, three, four, or more power supply loops may be used.
In the redundant power supply system of the railway camper, the power supply loops are redundant and standby, and the camper can supply power through one of the power supply loops under normal conditions; when a certain device in the power supply loop breaks down, the other power supply loop is started through the switching of the isolating switch 103 and the dual-power switching unit 4, so that the normal domestic power consumption of workers is ensured, the time and cost for waiting for rescue are reduced, and the reliability of power supply is improved; in addition, a contact net is adopted for power supply, and the problem of energy consumption or noise pollution caused by long-time use or frequent use of a diesel generator set can be solved.
In this embodiment, the pantograph 101 is a single-arm pantograph; the main circuit breaker 102 is a vacuum circuit breaker; the isolation power supply 103 is a single-pole double-throw electric isolation switch; the 1# step-down transformer 201 and the 2# step-down transformer 301 are oil-immersed transformers; the 1# rectifying unit 202 and the 2# rectifying unit 302 are single-phase bridge type uncontrollable rectifying circuits; the 1# inverter unit 204 and the 2# inverter unit 304 are three-phase bridge type full-control inverter circuits; the # 1 filtering unit 204 and the # 2 filtering unit 304 are combined circuits of a filtering transformer, a filtering capacitor and an EMI filter; the dual power supply switching unit 4 includes two mechanically or electrically interlocked switching components, which may be a combined circuit of a contactor and a circuit breaker; the # 1 UPS module 207 and the # 2 UPS module 307 are santa or emerson uninterruptible power supplies.
In this embodiment, the system further comprises a charger power supply loop and a diesel engine power supply loop, wherein the charger power supply loop (not shown in the figure) comprises a charger module, a storage battery pack and a charger control unit; the charger control unit is connected with the charger module; the input end of the charger module is connected with the output end of the inversion unit, the output end of the charger module is connected with the input end of the storage battery pack, and the output end of the storage battery pack is respectively connected with the charger control unit and the inversion control unit. The charger module is an AC-DC-AC-DC conversion circuit; the storage battery is a nickel metal hydride battery. The diesel engine power supply loop comprises a diesel engine, a generator and a generator control unit, wherein the diesel engine is connected with the generator, the output end of the generator is connected with the double power supply switching unit 4, the input end of the generator control unit is connected with the diesel engine, and the output end of the generator control unit is connected with the generator; wherein the diesel engine is a high-speed closed water circulation cooling diesel engine; the generator is a three-phase four-wire system alternating current generator. Under extreme conditions, if on the unusual circuit of no contact net or contact net, the dormitory car can pass through the diesel engine power supply circuit power supply, utilizes the rotatory rotor that drives the generator of diesel engine, and the generator will export induced electromotive force, produces the electric current through closed load circuit, obtains three-phase four-wire system AC380V power, supplies power for AC380V or AC220V consumer on the dormitory car through dual power supply switch unit 4 etc. guarantees staff's normal life power consumption.
The invention will be further described with reference to a specific and complete embodiment:
on a line with a contact network, the pantograph 101 is connected with a railway contact network and is used for accessing a single-phase alternating-current 25kV/50Hz power supply; the main circuit breaker 102 is connected with the pantograph 101 through a high-voltage cable and is used for connecting and disconnecting a single-phase alternating-current 25kV/50Hz power supply so as to protect a power supply system; the disconnecting switch 103 is connected with the main breaker 102 through a high-voltage cable and is used for transmitting single-phase alternating current 25kV/50Hz power to the No. 1 power supply circuit 2 or the No. 2 power supply circuit 3.
When the 1# power supply circuit 2 is started, the input end of the 1# step-down transformer 201 is connected with the output end A of the isolating switch 103, and the output end of the 1# step-down transformer 201 is connected with the input end of the 1# rectifying unit 202, so that a single-phase alternating current 25kV/50Hz power supply is converted into a single-phase alternating current 860V/50Hz power supply; the output end of the 1# rectifying unit 202 is connected with the input end of the 1# inverting unit 203 and is used for converting the single-phase alternating current 860V/50Hz into an intermediate direct-current power supply; the output end of the 1# inversion unit 203 is connected with the input end of the 1# filtering unit 204, and is used for converting the intermediate direct-current power supply into a three-phase four-wire system AC380V power supply. The No. 1 filtering unit 204 has two paths of outputs, one path of the output is connected with the dual-power switching unit 4 and supplies power to AC380V or AC220V electric equipment on the dormitory van; the other path is connected with the input end of the 1# UPS module 207, and provides AC220V input power for the 1# UPS module 207. The output end of the 1# UPS module 207 is connected to the 1# switching power supply 206 to provide an AC220V input power for the 1# switching power supply 206, and the output end of the 1# switching power supply 206 is connected to the 1# inversion control unit 205 to provide a DC110V control power for the 1# inversion control unit 205. The input end of the 1# inversion control unit 205 is connected with the 1# rectification unit 202 and is used for collecting the voltage and the current of the 1# rectification unit 202; the output end of the 1# inversion control unit 205 is connected to the 1# inversion unit 203, and is used for controlling the on/off and protection of the switching devices inside the 1# inversion unit 203.
In this embodiment, when the # 2 power supply circuit 3 is started, the input terminal of the # 2 step-down transformer 301 is connected to the output terminal B of the isolating switch 103, and the output terminal of the # 2 step-down transformer 301 is connected to the input terminal of the # 2 rectifying unit 302, so as to convert the single-phase ac 25kV/50Hz power supply into the single-phase ac 860V/50Hz power supply. The output end of the 2# rectifying unit 302 is connected with the input end of the 2# inverting unit 303, and is used for converting the single-phase alternating current 860V/50Hz into an intermediate direct-current power supply. The output end of the # 2 inverting unit 303 is connected with the input end of the # 2 filtering unit 304, and is used for converting the intermediate direct-current power supply into a three-phase four-wire system AC380V power supply. The No. 2 filtering unit 304 has two output paths, one output path is connected with the dual power supply switching unit 4 and supplies power to AC380V or AC220V electric equipment on the dormitory van; the other path is connected with the input end of the 2# UPS module 307, and provides input power of AC220V for the 2# UPS module 307. The output terminal of the # 2 UPS module 307 is connected to the # 2 switching power supply 306 to provide the input power of AC220V for the # 2 switching power supply 306. The output end of the # 2 switching power supply 306 is connected with the # 2 inversion control unit 305, and provides a DC110V control power supply for the # 2 inversion control unit 305. The input end of the 2# inversion control unit 305 is connected with the 2# rectification unit 302 and is used for collecting the voltage and the current of the 2# rectification unit 302; the output end of the 2# inversion control unit 305 is connected to the 2# inversion unit 303, and is used for controlling the on/off and protection of the switch device inside the 2# inversion unit 303.
In conjunction with the redundant power supply system, the power supply method of the redundant power supply system is further described, as shown in fig. 2, specifically including the following steps:
s1, confirming whether the 1# power supply circuit 2 has device faults; if the 1# power supply circuit 2 has no device failure, S3 is executed.
S3, checking that all switches of the power supply equipment are in a closed state, and turning the output end of the isolating switch 103 to an end A;
s4, starting the 1# UPS module 207 to obtain an AC220V power supply;
s5, after the 1# UPS module 207 operates stably, starting the 1# switching power supply 206 to obtain a DC110V power supply;
s6, after the 1# switching power supply 206 operates stably, starting the 1# inversion control unit 205;
s7, turning on the main circuit breaker 102 when the work indicator lamp of the 1# inversion control unit 205 turns on;
s8, after waiting for 10S, turning on a starting switch of the 1# inversion control unit module 205;
s9, when the AC380V power supply indicator lamp of the 1# filtering unit 204 is lightened, the dual power supply switching unit 4 is turned to '1 # power supply loop'.
In step S1, if there is a device failure in the 1# power supply circuit 2, S2 is performed.
S2, confirming whether the No. 2 power supply loop 3 has device faults or not; if the # 2 power supply circuit 2 has no device failure, S10 is executed.
S10, checking that all switches of the power supply equipment are in a closed state, and driving the output end of the isolating switch 103 to a terminal B;
s11, starting the 2# UPS module 307 to obtain an AC220V power supply;
s12, after the 2# UPS module 307 operates stably, starting the 2# switching power supply 306 to obtain a DC110V power supply;
s13, after the 2# switching power supply 306 operates stably, starting the 2# inversion control unit 305;
s14, turning on the main circuit breaker 102 when the working indicator lamp of the 2# inversion control unit 305 turns on;
s15, after waiting for 10S, turning on a starting switch of the 1# inversion control unit module 305;
s16, when the AC380V power supply indicator lamp of the 2# filtering unit 304 is lightened, the double power supply switching unit 4 is switched to the '2 # power supply loop'
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A redundant power supply system of a railway dormitory van is characterized by comprising a contact net power supply loop (1), a multi-path power supply loop and a multi-power supply switching unit; mutual redundancy among multiple power supply loops; the input end of each power supply circuit is connected with the output end of the contact net power supply circuit (1), and the output end of each power supply circuit is connected with the multi-power supply switching unit; each power supply loop comprises a step-down transformer, a rectifying unit, an inversion control unit and a control power supply unit, wherein the step-down transformer, the rectifying unit and the inversion unit are sequentially connected, the input end of the inversion control unit is respectively connected with the rectifying unit and the control power supply unit, the output end of the inversion control unit is connected with the inversion unit, and the input end of the control power supply unit is connected with the inversion unit.
2. The redundant power supply system of a railway camper car according to claim 1, wherein the catenary power supply circuit (1) comprises a pantograph (101), a main circuit breaker (102) and a disconnector (103), and the pantograph (101), the main circuit breaker (102) and the disconnector (103) are connected in sequence.
3. The redundant power supply system of a railway camper car according to claim 2, wherein the pantograph (101) is a single-armed pantograph, the main circuit breaker (102) is a vacuum circuit breaker, and the disconnector (103) is a single-pole double-throw electric disconnector.
4. The redundant power supply system of the railway camper according to any one of claims 1 to 3, wherein each power supply loop further comprises a filter unit, and an input end of the filter unit is connected with an output end of the inverter unit.
5. The redundant power supply system for railway camper cars according to claim 4, wherein said filtering unit comprises one or more of a filtering transformer, a filtering capacitor, and an EMI filter.
6. The redundant power supply system of the railway camper car according to any one of claims 1 to 3, wherein the rectification unit is a single-phase bridge type uncontrollable rectification circuit, and the inversion unit is a three-phase bridge type fully-controlled inversion circuit.
7. The redundant power supply system of a railway camper according to any one of claims 1 to 3, wherein the control power supply unit comprises a UPS module and a switching power supply, an input end of the UPS module is connected with an output end of the inversion unit, an output end of the UPS module is connected with an input end of the switching power supply, and an output end of the switching power supply is connected with the inversion control unit.
8. The redundant power supply system of the railway camper car according to any one of claims 1 to 3, wherein the number of the power supply loops is two, namely a # 1 power supply loop (2) and a # 2 power supply loop (3).
9. The redundant power supply system of the railway camper car according to any one of claims 1 to 3, further comprising a diesel engine power supply loop, wherein the diesel engine power supply loop comprises a diesel engine, a generator and a generator control unit, the diesel engine is connected with the generator, the output end of the generator is connected with the multi-power switching unit, the input end of the generator control unit is connected with the diesel engine, and the output end of the generator control unit is connected with the generator.
10. The redundant power supply system of the railway camper car according to any one of claims 1 to 3, further comprising a charger power supply loop, wherein the charger power supply loop comprises a charger module, a storage battery pack and a charger control unit; the charger control unit is connected with the charger module; the input end of the charger module is connected with the output end of the inversion unit, the output end of the charger module is connected with the input end of the storage battery pack, and the output end of the storage battery pack is respectively connected with the charger control unit and the inversion control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020584573.4U CN211790938U (en) | 2020-04-17 | 2020-04-17 | Redundant power supply system of railway dormitory van |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020584573.4U CN211790938U (en) | 2020-04-17 | 2020-04-17 | Redundant power supply system of railway dormitory van |
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| CN211790938U true CN211790938U (en) | 2020-10-27 |
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