CN112968593A - AC/DC dual-purpose power supply device - Google Patents
AC/DC dual-purpose power supply device Download PDFInfo
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- CN112968593A CN112968593A CN202110136264.XA CN202110136264A CN112968593A CN 112968593 A CN112968593 A CN 112968593A CN 202110136264 A CN202110136264 A CN 202110136264A CN 112968593 A CN112968593 A CN 112968593A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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Abstract
The invention discloses an AC/DC dual-purpose power supply device, in the application, a dual-flow vehicle can be selectively powered by an AC power supply circuit or a DC power supply circuit no matter the dual-flow vehicle stays on a static regulation track or a dynamic regulation track, namely, the AC/DC dual-purpose power supply device can finish AC power supply and DC power supply to the dual-flow vehicle on the static regulation track and the dynamic regulation track and can simultaneously test the dual-flow vehicle on the dynamic regulation track and the static regulation track, thereby meeting the power supply requirements of the dual-flow vehicle under static test and dynamic test scenes and smoothly developing the test on the dual-flow vehicle.
Description
Technical Field
The invention relates to the field of railway vehicles, in particular to an alternating current and direct current dual-purpose power supply device.
Background
The double-flow system vehicle is a emerging rail vehicle, in the running process of the double-flow system vehicle, alternating current power supply or direct current power supply can be selected according to factors such as platform distance and the like, the rail vehicle including the double-flow system vehicle usually needs to be subjected to static test and dynamic test when leaving a factory, in order to achieve the authenticity of simulation, the double-flow system vehicle needs to be subjected to alternating current power supply and direct current power supply when being subjected to static test and dynamic test, however, a power supply device for double-flow system vehicle test is not provided in the prior art, so that the power supply requirement of the double-flow system vehicle under a test scene is met, and the test work of the double-flow system vehicle is difficult to develop.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an AC/DC dual-purpose power supply device, which meets the power supply requirements of a double-flow vehicle in static test and dynamic test scenes and can smoothly develop the test of the double-flow vehicle.
In order to solve the above technical problem, the present invention provides an ac/dc dual-purpose power supply device, including:
the static adjusting track is used for connecting the current of the double-flow system vehicle carried by the static adjusting track back to the corresponding power supply circuit;
the dynamic adjusting track is used for connecting the current of the double-current system vehicle carried by the dynamic adjusting track back to the corresponding power supply circuit;
the static contact network is used for connecting the received electric energy to the double-current system vehicle on the static rail so as to carry out static test;
the dynamic adjusting contact network is used for connecting the received electric energy to the double-current system vehicle on the dynamic adjusting track so as to carry out dynamic test;
the alternating current power supply circuit is respectively connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network and is used for providing alternating current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network through the alternating current power supply circuit;
the direct current power supply circuit is connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network respectively and used for providing direct current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network through the direct current power supply circuit.
Preferably, the ac power supply circuit includes:
the alternating current power supply is used for providing alternating current with a specified specification;
the first power supply selection switch is used for controlling the alternating current power supply to be communicated with the static contact network and/or the dynamic contact network through the first power supply selection switch;
the first end of the first return current selection switch is connected with the static adjusting track and the dynamic adjusting track respectively, and the second end of the first return current selection switch is connected with the alternating current power supply and is used for controlling the static adjusting track and/or the dynamic adjusting track to be connected with the alternating current power supply through the first return current selection switch so as to form a complete loop.
Preferably, the first power supply selection switch includes a first circuit breaker, a first disconnector, a second disconnector, and a third disconnector:
the first end of first circuit breaker with alternating current power supply's output is connected, the second end of first circuit breaker with first isolator's first end is connected, first isolator's second end respectively with second isolator's first end and third isolator's first end are connected, second isolator's second end with the dynamic adjustment touches the net and connects, third isolator's second end with the static adjustment touches the net and connects.
Preferably, the dc power supply circuit includes:
the direct current power supply is used for providing direct current with specified specification;
the second power supply selection switch is used for controlling the direct-current power supply to be connected with the static contact network and/or the dynamic contact network;
the second backflow selection switch is used for controlling the static adjusting track and/or the dynamic adjusting track to be connected to the direct-current power supply through the second backflow selection switch so as to form a complete loop;
the first end of the zero potential protection device is connected with the movable adjusting track, and the second end of the zero potential protection device is grounded and is used for setting the potential of the movable adjusting track to zero;
wherein the static rail is grounded.
Preferably, the second power supply selection switch comprises a second circuit breaker, a fourth disconnecting switch and a fifth disconnecting switch;
the first end of second circuit breaker with DC power supply's output positive pole is connected, the second end of second circuit breaker respectively with fourth isolator's first end and fifth isolator's first end is connected, fourth isolator's second end with the dynamic adjustment touches the net and connects, fifth isolator's second end with the static adjustment touches the net and connects.
Preferably, the ac/dc power supply device further includes:
the single-rail vehicle grounding rail is used for grounding the single-rail vehicle;
the monorail vehicle overhead line system is used for connecting the received electric energy to the monorail vehicle;
the first on-off control switch is used for controlling the on-off of a line between the direct-current power supply and the overhead contact system of the monorail vehicle through the first on-off control switch;
and the second on-off control switch is used for controlling the on-off of a line between the direct-current power supply and the overhead line system of the monorail vehicle.
Preferably, the dc power supply includes:
the first switch cabinet is used for providing alternating current;
the first rectifier is connected with the first switch cabinet and used for rectifying the alternating current provided by the first switch cabinet to obtain direct current with first preset voltage;
the second switch cabinet is used for providing alternating current;
the second rectifier is used for rectifying the alternating current provided by the second switch cabinet to obtain direct current with the first preset voltage;
the positive bus is respectively connected with the positive electrode of the output end of the first rectifier and the positive electrode of the output end of the second rectifier and is used as the positive electrode of the direct-current power supply;
the negative bus is respectively connected with the negative electrode of the output end of the first rectifier and the negative electrode of the output end of the second rectifier and is used as the negative electrode of the direct current power supply;
the series-parallel control circuit is used for controlling the connection mode of the output end of the first rectifier and the output end of the second rectifier to be series connection or parallel connection so as to provide direct current with different voltage levels;
the first single-rail potential adjusting device is used for controlling the negative bus to be grounded through the first single-rail potential adjusting device when a 1500V direct current power supply test is carried out on a single-rail vehicle;
and the second single-rail potential adjusting device is used for setting the potential between the positive bus and the negative bus to be zero through the second single-rail potential adjusting device when the +/-375 direct current test is carried out on the single-rail vehicle.
Preferably, the series-parallel control circuit includes:
the first end of the third on-off control switch is connected with the positive pole of the output end of the first rectifier, and the second end of the third on-off control switch is connected with the positive pole bus;
the first end of the fourth on-off control switch is connected with the negative electrode of the output end of the second rectifier, and the second end of the fourth on-off control switch is connected with the negative electrode bus;
the first end of the first rectifier is connected with the positive electrode of the output end of the first rectifier and the first end of the third on-off control switch, the second end of the first rectifier is connected with the negative electrode of the output end of the second rectifier and the first end of the fourth on-off control switch, and the connection switch is used for controlling the connection mode of the output end of the first rectifier and the output end of the second rectifier in series or in parallel through the connection switch and the third control switch and the fourth control switch so as to provide direct currents with different voltage levels.
Preferably, the ac/dc power supply device further includes:
the fifth on-off control switch is connected with the negative bus at a first end and is used for connecting the negative bus with a reference electrode through the fifth on-off control switch when the double-flow system vehicle on the dynamic adjusting track is tested;
and the reference electrode is connected with the fifth on-off control switch and is used for detecting the stray current on the dynamic adjusting track through the reference electrode.
Preferably, the dual-flow vehicle is a subway.
The invention provides an alternating current-direct current dual-purpose power supply device, in the application, a dual-flow vehicle can be selectively powered by an alternating current power supply circuit or a direct current power supply circuit no matter the dual-flow vehicle stays on a static regulation rail or a dynamic regulation rail, namely, the alternating current power supply and the direct current power supply of the dual-flow vehicle can be completed on the static regulation rail and the dynamic regulation rail through the alternating current-direct current dual-purpose power supply device, and the dual-flow vehicle on the dynamic regulation rail and the static regulation rail can be tested at the same time, so that the power supply requirements of the dual-flow vehicle under static test and dynamic test scenes are met, and the test of the dual-flow vehicle can be smoothly developed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an ac/dc power supply device provided in the present invention;
fig. 2 is a schematic structural diagram of another ac/dc dual-purpose power supply device provided by the present invention;
fig. 3 is a schematic structural diagram of a dc power supply provided by the present invention.
Detailed Description
The core of the invention is to provide an AC/DC dual-purpose power supply device, which meets the power supply requirements of a double-flow system vehicle in static test and dynamic test scenes and can smoothly develop the test of the double-flow system vehicle.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an ac/dc power supply device provided in the present invention, the ac/dc power supply device includes:
the static adjusting track is used for connecting the current of the double-flow system vehicle carried by the static adjusting track back to the corresponding power supply circuit;
the dynamic adjusting track is used for connecting the current of the double-flow system vehicle born by the dynamic adjusting track back to the corresponding power supply circuit;
the static contact network is used for connecting the received electric energy to a double-current system vehicle on a static rail so as to carry out static test;
the dynamic adjusting contact network is used for connecting the received electric energy to a double-current system vehicle on a dynamic adjusting track so as to carry out dynamic test;
the alternating current power supply circuit 1 is respectively connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network and is used for providing alternating current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network;
and the direct current power supply circuit 2 is respectively connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network and is used for providing direct current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network.
Specifically, in view of the technical problems in the background art, an ac/dc dual-purpose power supply device including an ac power supply circuit 1 and a dc power supply circuit 2 is designed in the present application, the ac power supply circuit 1 and the dc power supply circuit 2 can selectively supply power to a static contact network and/or a dynamic contact network, and the static rail and the dynamic rail can both return the current of the dual-flow vehicle carried by themselves to corresponding power supply loops, so that power supply loops of various systems of the dual-flow vehicle under dynamic test and static test scenarios can be formed, dynamic test and static test can be performed, and the performance of the dual-flow vehicle can be comprehensively and accurately tested.
The static adjusting track is usually arranged indoors, the double-flow system vehicle can be placed on the static adjusting track and powered on, various static test items for the double-flow system vehicle are completed in a powered-on state, after static test, various functions and performance states of the double-flow system vehicle in a static state can be ensured, dynamic test can be conducted, the dynamic adjusting track is usually arranged outdoors, after the double-flow system vehicle is placed on the dynamic adjusting track, the double-flow system vehicle can be in a moving state by supplying power to the double-flow system vehicle, and various dynamic test items for the double-flow system vehicle can be conducted.
Specifically, a dual-current vehicle usually needs 1500V dc power supply, the static rail is usually grounded, so that the negative voltage of the rail and the ac power supply circuit 1 can be zero, and the dynamic rail is usually not grounded, so that the negative ground in the ac power supply circuit 1 can be additionally controlled.
Wherein the control of several selection switches can be performed in various ways, e.g. manually, but care is taken to avoid that both ac and dc are supplied to the same overhead line.
The invention provides an alternating current-direct current dual-purpose power supply device, in the application, a dual-flow vehicle can be selectively powered by an alternating current power supply circuit or a direct current power supply circuit no matter the dual-flow vehicle stays on a static regulation rail or a dynamic regulation rail, namely, the alternating current power supply and the direct current power supply of the dual-flow vehicle can be completed on the static regulation rail and the dynamic regulation rail through the alternating current-direct current dual-purpose power supply device, and the dual-flow vehicle on the dynamic regulation rail and the static regulation rail can be tested at the same time, so that the power supply requirements of the dual-flow vehicle under static test and dynamic test scenes are met, and the test of the dual-flow vehicle can be smoothly developed.
For better explaining the embodiment of the present invention, please refer to fig. 2, fig. 2 is a schematic structural diagram of another ac/dc dual-purpose power supply apparatus provided by the present invention, and on the basis of the above embodiment:
as a preferred embodiment, the ac power supply circuit 1 includes:
an alternating current power supply 11 for supplying alternating current of a specified specification;
the first power supply selection switch 12 is connected with the alternating current power supply 11 at a first end, and is respectively connected with the static contact network and the dynamic contact network at a second end, and is used for controlling the alternating current power supply 11 to be communicated with the static contact network and/or the dynamic contact network through the first power supply selection switch 12;
a first return current selection switch 13 with a first end connected with the static adjusting track and the dynamic adjusting track respectively, and a second end connected with the alternating current power supply 11, and is used for controlling the static adjusting track and/or the dynamic adjusting track to be connected with the alternating current power supply 11 through the first return current selection switch so as to form a complete loop.
Specifically, by controlling the first power supply selection switch 12 and the first return current selection switch 13, the dual-current system vehicle on the dynamic regulation track and/or the static regulation track can be selectively provided with alternating current.
The ac power source 11 may include a switch cabinet and a three-phase to single-phase transformer connected to an output end of the switch cabinet, so that the output end of the three-phase to single-phase transformer is finally used as an output end of the ac power source 11 for ac output.
Of course, the ac power supply circuit 1 may have other specific structures besides the specific structure in the embodiment of the present invention, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the first supply selection switch 12 comprises a first breaker Q1, a first disconnector QS1, a second disconnector QS2 and a third disconnector QS 3:
a first end of the first circuit breaker Q1 is connected with an output end of the ac power supply 11, a second end of the first circuit breaker Q1 is connected with a first end of a first isolating switch QS1, a second end of the first isolating switch QS1 is connected with a first end of a second isolating switch QS2 and a first end of a third isolating switch QS3 respectively, a second end of the second isolating switch QS2 is connected with a dynamic contact network, and a second end of the third isolating switch QS3 is connected with a static contact network.
Specifically, the first breaker Q1 has an arc extinguishing function when the control loop is formed and opened, the first breaker Q1 can be closed last when the control loop is formed, and the first breaker Q1 can be opened first when the control loop is opened.
In the embodiment of the invention, whether a dual-current vehicle supplying alternating current to a dynamic adjusting track or a dual-current vehicle on a static adjusting track can be selected by controlling the second disconnecting switch QS2 and the third disconnecting switch QS3, as for the first disconnecting switch QS1, when the first circuit breaker Q1 is overhauled, in order to prevent a certain contact net from being electrified due to the direct current supply circuit 2, the second disconnecting switch QS2 or the third disconnecting switch QS3 corresponding to the electrified contact net is just not closed, and at this time, the first disconnecting switch QS1 is closed before overhauling, so that overhauling work of the first circuit breaker Q1 can be safely carried out.
It should be noted that, as shown in fig. 2, the first backflow selecting switch 13 may include a sixth isolating switch QS6 and a seventh isolating switch QS7, and the second backflow selecting switch 23 may include an eighth isolating switch QS8 and a ninth isolating switch QS 9.
Of course, the first power supply selection switch 12 may have other specific configurations besides this configuration, and the embodiment of the present invention is not limited thereto.
As a preferred embodiment, the dc power supply circuit 2 includes:
a dc power supply 21 for supplying a dc power of a specified specification;
the second power supply selection switch 22 is used for controlling the direct-current power supply 21 to be communicated with the static contact network and/or the dynamic contact network;
a second return selection switch 23 for controlling the connection of the static and/or dynamic regulation rail to the dc power supply 21, so as to form a complete loop;
the first end of the zero potential protection device is connected with the dynamic adjusting track, and the second end of the zero potential protection device is grounded and is used for setting the potential of the dynamic adjusting track to zero;
wherein the static rail is grounded.
Specifically, the second power supply selection switch 22 and the second return selection switch 23 are controlled to selectively provide the direct current to the dual-current vehicle on the dynamic regulation rail and/or the static regulation rail, the zero potential protection device can enable the negative pole potentials of the dynamic regulation rail and the direct current power supply 21 to be zero, so that the total direct current requirement of the dual-current vehicle is met, and in the embodiment of the invention, the direct current power supply selection switch 22 and the second return selection switch 23 are only included, so that the structure is simple and the maintenance is convenient.
Of course, the dc power supply circuit 2 may have other structures besides the specific structure, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the second supply selection switch 22 comprises a second breaker Q2, a fourth disconnector QS4 and a fifth disconnector QS 5;
a first end of the second circuit breaker Q2 is connected with the positive electrode of the output end of the dc power supply 21, a second end of the second circuit breaker Q2 is connected with a first end of a fourth isolating switch QS4 and a first end of a fifth isolating switch QS5, a second end of the fourth isolating switch QS4 is connected with a dynamic adjusting contact network, and a second end of the fifth isolating switch QS5 is connected with a static adjusting contact network.
Specifically, the fourth disconnecting switch QS4 and the fifth disconnecting switch QS5 can select the dual-current system vehicle which supplies the direct current to the dynamic adjusting track and/or the static adjusting track, and the second power supply selection switch 22 in the embodiment of the invention has the advantages of simple structure, convenience in maintenance and low cost.
The description of the first breaker Q1 can be referred to for the significance of the operation sequence and the arrangement of the first breaker Q1, and the description of the first breaker Q1 can be referred to for the significance of the operation sequence and the arrangement of all breakers in the present application, and the embodiments of the present invention are not limited herein.
Of course, the second power supply selection switch 22 may have other specific configurations besides the specific configuration, and the embodiment of the present invention is not limited thereto.
As a preferred embodiment, the ac/dc power supply device further includes:
the single-rail vehicle grounding rail is used for grounding the single-rail vehicle;
the monorail vehicle overhead line system is used for connecting the received electric energy to the monorail vehicle;
the first on-off control switch K1 is connected with the direct-current power supply 21 at the first end and is connected with a monorail vehicle contact network at the second end, and is used for controlling the on-off of a line between the direct-current power supply 21 and the monorail vehicle contact network through the first on-off control switch K1;
and the second on-off control switch K2 is used for controlling the on-off of a line between the direct current power supply 21 and a monorail vehicle contact network through the second on-off control switch K2.
Specifically, in order to enable the power supply device in the embodiment of the present invention to be compatible with the function of testing and supplying power to the single-track vehicle, the power supply device in the embodiment of the present invention further includes the power supply device for testing and supplying power to the single-track vehicle as described above, and the dc power supply 21 may be configured to supply power to the single-track vehicle by closing both the first on-off control switch K1 and the second on-off control switch K2.
It is worth mentioning that, as shown in fig. 2, besides K1, a third breaker Q3 may be connected in series between the dc power supply and the positive pole of the overhead line system of the monorail vehicle, so as to extinguish the arc when the circuit is switched off.
Unlike the double-current system vehicle, when the monorail vehicle flows back, the current of the monorail vehicle needs to be connected back to the direct-current power supply 21 through the negative electrode of the overhead line system.
For better explaining the embodiment of the present invention, please refer to fig. 3, fig. 3 is a schematic structural diagram of a dc power supply provided by the present invention, and as a preferred embodiment, the dc power supply 21 includes:
a first switch cabinet 211 for supplying ac power;
the first rectifier 212 is connected to the first switch cabinet 211 and is configured to rectify the ac power provided by the first switch cabinet 211 to obtain a dc power having a first preset voltage;
a second switch cabinet 213 for supplying ac power;
the second rectifier 214 is configured to rectify the ac power provided by the second switch cabinet 213 to obtain a dc power having a first preset voltage;
a positive bus bar connected to the positive electrode of the output terminal of the first rectifier 212 and the positive electrode of the output terminal of the second rectifier 214, respectively, and configured to serve as the positive electrode of the dc power supply 21;
a negative bus bar connected to the negative electrode of the output terminal of the first rectifier 212 and the negative electrode of the output terminal of the second rectifier 214, respectively, and configured to serve as the negative electrode of the dc power supply 21;
a series-parallel control circuit 215 for controlling the output terminal of the first rectifier 212 and the output terminal of the second rectifier 214 to be connected in series or in parallel so as to provide direct currents of different voltage levels;
the first single-rail potential adjusting device 216 is used for controlling the negative bus to be grounded through the first single-rail potential adjusting device when a 1500V direct current power supply test is carried out on the single-rail vehicle;
and a second single-rail potential adjusting device 217 for setting the potential between the positive bus and the negative bus to zero when the single-rail vehicle is subjected to a ± 375 dc test.
Specifically, considering that the system of dc power generally required by a monorail vehicle includes dc power of ± 375V or dc power of 1500V, each rectifier can output dc power of 750V by providing two rectifiers in the embodiment of the present invention, so that it is possible to provide dc power of 750V by operating a single rectifier or two rectifiers in parallel and adjust it to dc power of ± 375V by the second single-rail potential adjusting device 217, or to operate two rectifiers in series and adjust it to dc power of 1500V by the first single-rail potential adjusting device 216.
Specifically, the selection of the connection mode of the output end of the first rectifier 212 and the output end of the second rectifier 214 can be realized through the series-parallel control circuit 215.
The first single-rail potential adjusting device 216 may include a sixth on-off control switch K7 and a first resistor R1 connected in series, and when a 1500V dc power supply test is performed on the single-rail vehicle, the potential of the negative bus may be made zero by closing the sixth on-off control switch K7, and a leakage analysis of the single-rail vehicle may be performed by a current on the first resistor R1.
Specifically, the second single-rail potential adjusting device 217 may include a seventh on-off control switch K8, an eighth on-off control switch K9, a second resistor R2, and a third resistor R3, wherein a first end of the seventh on-off control switch K8 is connected to the positive bus, a second end of the seventh on-off control switch K8 is connected to a first end of the second resistor R2, a first end of the eighth on-off control switch K9 is connected to the negative bus, a second end of the eighth on-off control switch K9 is connected to a first end of the third resistor R3, and second ends of the second resistor R2 and the third resistor R3 are both grounded (in addition, the first end may be additionally connected to a second end of the second resistor R2 and a second end of the third resistor R3, the ninth on-off control switch K10 whose second end is grounded may be provided, and the function of replacing K8 and K9 by a single resistor K10 may be provided.
Of course, the first single-rail potential adjustment device 216 and the second single-rail potential adjustment device 217 may have other configurations in addition to the above-described configuration, and the embodiment of the present invention is not limited thereto.
It is worth mentioning that all on-off control switches mentioned in the present application may be isolation switches.
Of course, the dc power supply 21 may have other structures besides the dc power supply 21 in the embodiment of the present invention, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the series-parallel control circuit 215 includes:
a third on-off control switch K3 with a first end connected with the positive pole of the output end of the first rectifier 212 and a second end connected with the positive pole bus;
a fourth on-off control switch K4 having a first end connected to the negative terminal of the output terminal of the second rectifier 214 and a second end connected to the negative bus bar;
the first end of the interconnection switch K6 is connected to the positive terminal of the output terminal of the first rectifier 212 and the first end of the third on-off control switch K3, and the second end of the interconnection switch K6 is connected to the negative terminal of the output terminal of the second rectifier 214 and the first end of the fourth on-off control switch K4, respectively, for controlling the output terminals of the first rectifier 212 and the second rectifier 214 to be connected in series or in parallel through the interconnection switch K and the third on-off control switch and the fourth on-off control switch, so as to provide direct currents with different voltage levels.
Specifically, the parallel connection of the output end of the first rectifier 212 and the output end of the second rectifier 214 can be realized by opening the tie switch K6 and simultaneously closing the third break control switch K3 and the fourth break control switch K4, whereas the parallel connection of the output end of the first rectifier 212 and the output end of the second rectifier 214 can be realized by opening the tie switch and simultaneously opening the third break control switch K3 and the fourth break control switch K4, and the independent use of the dc voltage output by one of the rectifiers can be realized by closing only the third break control switch K3 or the fourth break control switch K4.
Specifically, the series-parallel control circuit 215 in the embodiment of the present invention has a simple structure, is convenient to maintain, and has a low cost.
Of course, the series-parallel control circuit 215 may be of other types besides this structure, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the ac/dc power supply device further includes:
the fifth on-off control switch K5 is connected with the negative bus at the first end and is used for connecting the negative bus with the reference electrode through the fifth on-off control switch K5 when the double-current system vehicle on the dynamic adjusting track is tested;
and the reference electrode is connected with the fifth on-off control switch K5 and is used for detecting the stray current on the dynamic adjusting track through the current of the reference electrode.
Specifically, in order to detect and analyze the stray current on the dynamic adjustment track, a reference electrode connected with the negative bus is further arranged in the embodiment of the invention, the connection between the negative bus and the reference electrode can be realized through the fifth on-off control switch K5, and the fifth on-off control switch K5 is preferably closed only when the direct current power supply is performed on the dual-current vehicle on the dynamic adjustment track.
As a preferred embodiment, the dual flow vehicle is a subway.
Specifically, the subway has the characteristics of wide application range and large number, and certainly, the double-flow vehicle can be of other types besides the subway, and the embodiment of the invention is not limited herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An ac/dc power supply device, comprising:
the static adjusting track is used for connecting the current of the double-flow system vehicle carried by the static adjusting track back to the corresponding power supply circuit;
the dynamic adjusting track is used for connecting the current of the double-current system vehicle carried by the dynamic adjusting track back to the corresponding power supply circuit;
the static contact network is used for connecting the received electric energy to the double-current system vehicle on the static rail so as to carry out static test;
the dynamic adjusting contact network is used for connecting the received electric energy to the double-current system vehicle on the dynamic adjusting track so as to carry out dynamic test;
the alternating current power supply circuit is respectively connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network and is used for providing alternating current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network through the alternating current power supply circuit;
the direct current power supply circuit is connected with the static adjusting track, the dynamic adjusting track, the static adjusting contact network and the dynamic adjusting contact network respectively and used for providing direct current with specified specifications to the static adjusting contact network and/or the dynamic adjusting contact network through the direct current power supply circuit.
2. The ac-dc power supply apparatus according to claim 1, wherein the ac power supply circuit comprises:
the alternating current power supply is used for providing alternating current with a specified specification;
the first power supply selection switch is used for controlling the alternating current power supply to be communicated with the static contact network and/or the dynamic contact network through the first power supply selection switch;
the first end of the first return current selection switch is connected with the static adjusting track and the dynamic adjusting track respectively, and the second end of the first return current selection switch is connected with the alternating current power supply and is used for controlling the static adjusting track and/or the dynamic adjusting track to be connected with the alternating current power supply through the first return current selection switch so as to form a complete loop.
3. The ac-dc power supply device according to claim 2, wherein the first power selection switch includes a first circuit breaker, a first isolation switch, a second isolation switch, and a third isolation switch:
the first end of first circuit breaker with alternating current power supply's output is connected, the second end of first circuit breaker with first isolator's first end is connected, first isolator's second end respectively with second isolator's first end and third isolator's first end are connected, second isolator's second end with the dynamic adjustment touches the net and connects, third isolator's second end with the static adjustment touches the net and connects.
4. The ac-dc power supply apparatus according to claim 2, wherein the dc power supply circuit comprises:
the direct current power supply is used for providing direct current with specified specification;
the second power supply selection switch is used for controlling the direct-current power supply to be connected with the static contact network and/or the dynamic contact network;
the second backflow selection switch is used for controlling the static adjusting track and/or the dynamic adjusting track to be connected to the direct-current power supply through the second backflow selection switch so as to form a complete loop;
the first end of the zero potential protection device is connected with the movable adjusting track, and the second end of the zero potential protection device is grounded and is used for setting the potential of the movable adjusting track to zero;
wherein the static rail is grounded.
5. The AC/DC power supply device according to claim 4, wherein the second power selection switch comprises a second circuit breaker, a fourth disconnecting switch and a fifth disconnecting switch;
the first end of second circuit breaker with DC power supply's output positive pole is connected, the second end of second circuit breaker respectively with fourth isolator's first end and fifth isolator's first end is connected, fourth isolator's second end with the dynamic adjustment touches the net and connects, fifth isolator's second end with the static adjustment touches the net and connects.
6. The AC/DC power supply of claim 4, further comprising:
the single-rail vehicle grounding rail is used for grounding the single-rail vehicle;
the monorail vehicle overhead line system is used for connecting the received electric energy to the monorail vehicle;
the first on-off control switch is used for controlling the on-off of a line between the direct-current power supply and the overhead contact system of the monorail vehicle through the first on-off control switch;
and the second on-off control switch is used for controlling the on-off of a line between the direct-current power supply and the overhead line system of the monorail vehicle.
7. The AC/DC power supply of claim 6, wherein said DC power source comprises:
the first switch cabinet is used for providing alternating current;
the first rectifier is connected with the first switch cabinet and used for rectifying the alternating current provided by the first switch cabinet to obtain direct current with first preset voltage;
the second switch cabinet is used for providing alternating current;
the second rectifier is used for rectifying the alternating current provided by the second switch cabinet to obtain direct current with the first preset voltage;
the positive bus is respectively connected with the positive electrode of the output end of the first rectifier and the positive electrode of the output end of the second rectifier and is used as the positive electrode of the direct-current power supply;
the negative bus is respectively connected with the negative electrode of the output end of the first rectifier and the negative electrode of the output end of the second rectifier and is used as the negative electrode of the direct current power supply;
the series-parallel control circuit is used for controlling the connection mode of the output end of the first rectifier and the output end of the second rectifier to be series connection or parallel connection so as to provide direct current with different voltage levels;
the first single-rail potential adjusting device is used for controlling the negative bus to be grounded through the first single-rail potential adjusting device when a 1500V direct current power supply test is carried out on a single-rail vehicle;
and the second single-rail potential adjusting device is used for setting the potential between the positive bus and the negative bus to be zero through the second single-rail potential adjusting device when the +/-375 direct current test is carried out on the single-rail vehicle.
8. The AC/DC power supply device according to claim 7, wherein said series-parallel control circuit comprises:
the first end of the third on-off control switch is connected with the positive pole of the output end of the first rectifier, and the second end of the third on-off control switch is connected with the positive pole bus;
the first end of the fourth on-off control switch is connected with the negative electrode of the output end of the second rectifier, and the second end of the fourth on-off control switch is connected with the negative electrode bus;
the first end of the first rectifier is connected with the positive electrode of the output end of the first rectifier and the first end of the third on-off control switch, the second end of the first rectifier is connected with the negative electrode of the output end of the second rectifier and the first end of the fourth on-off control switch, and the connection switch is used for controlling the connection mode of the output end of the first rectifier and the output end of the second rectifier in series or in parallel through the connection switch and the third control switch and the fourth control switch so as to provide direct currents with different voltage levels.
9. The apparatus of claim 7, further comprising:
the fifth on-off control switch is connected with the negative bus at a first end and is used for connecting the negative bus with a reference electrode through the fifth on-off control switch when the double-flow system vehicle on the dynamic adjusting track is tested;
and the reference electrode is connected with the fifth on-off control switch and is used for detecting the stray current on the dynamic adjusting track through the reference electrode.
10. The ac-dc power supply unit according to any one of claims 1 to 9, wherein the dual-flow vehicle is a subway.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110136264.XA CN112968593A (en) | 2021-02-01 | 2021-02-01 | AC/DC dual-purpose power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110136264.XA CN112968593A (en) | 2021-02-01 | 2021-02-01 | AC/DC dual-purpose power supply device |
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Application publication date: 20210615 |