CN111210702B - Subway traction power transformation system training platform - Google Patents
Subway traction power transformation system training platform Download PDFInfo
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- CN111210702B CN111210702B CN202010138433.9A CN202010138433A CN111210702B CN 111210702 B CN111210702 B CN 111210702B CN 202010138433 A CN202010138433 A CN 202010138433A CN 111210702 B CN111210702 B CN 111210702B
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
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Abstract
The invention discloses a subway traction power transformation system training platform, and belongs to the field of subway power transformation system training. The subway traction power transformation system training platform comprises a first medium-voltage switch cabinet which supplies power by replacing AC35KV voltage of a subway traction power transformation system with civil voltage of AC380V, wherein the first medium-voltage switch cabinet is electrically connected with a traction transformer, the traction transformer is electrically connected with a rectifier cabinet, the positive end of the rectifier cabinet is connected to a contact network through a direct-current inlet cabinet and a direct-current feeder cabinet in sequence, and the negative end of the rectifier cabinet is connected to a return rail through a negative cabinet; according to the invention, the highest voltage level is set to be AC380V, namely the electricity utilization level of domestic electricity and production in China, namely AC380V voltage is used for replacing the original AC35kV voltage to supply power to the first medium-voltage switch cabinet and the second medium-voltage switch cabinet, the direct-current voltage sides of the direct-current inlet cabinet and the negative pole cabinet are set to be DC48V through the first medium-voltage switch cabinet, the traction transformer and the rectifier cabinet, namely DC48V is used for replacing DC1500V, the voltage level is ensured, and the use safety is ensured.
Description
Technical Field
The invention relates to the technical field of subway power transformation system training, in particular to a subway traction power transformation system training platform.
Background
The subway traction power transformation system is the core of the subway, is a basic condition for providing energy for subway operation and ensuring safe and stable operation of the subway, has similar basic principles and mature and stable performance of the conventional subway traction power transformation systems of various brands, provides feasibility for integrating the traction power transformation systems of various brands, and can be divided into two parts: a traction power transformation section; the step-down power transformation part comprises a traction power transformation part: the system comprises a first medium-voltage switch cabinet, a traction transformer, a rectifier, a negative electrode cabinet, a direct current screen, a rail potential limiting device and an isolation switch cabinet; the step-down power transformation part comprises: the system comprises a first medium-voltage switch cabinet, a step-down transformer, a low-voltage distribution panel, an alternating current and direct current panel and a PSCADA cabinet; in addition, the development of the subway is rapid; the demand for relevant talents is sharply increased; the talent culture of each college and university is restricted by various conditions, and a relevant model or an entity system is mostly adopted for teaching, and temporary stay is in theory; after entering a working unit, the actual operation of the plant is cultured by a human unit; the student can become the technical bone platform after a long time.
At present, in various colleges, models are adopted for teaching, and although the models are visual, the internal structure, the working state and the system function cannot be displayed; by adopting the entity system, the cost of the colleges is increased, and the system function can not be shown by electrifying because the voltage level is higher; even if the institution and the school do not provide the power supply with the voltage, the potential safety hazard is very large due to the defects of the knowledge and the practical skills of the students; it is even impossible to provide such a large load for the system to exhibit its functions; in summary, the two teaching methods currently used in colleges and universities cannot show system functions, nor do they simulate and reproduce faults, nor can they guide students to remove faults.
Disclosure of Invention
The invention aims to provide a subway traction power transformation system training platform for solving the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the subway traction power transformation system training platform comprises a first medium-voltage switch cabinet which supplies power by adopting civil voltage of AC380V to replace AC35KV voltage of a subway traction power transformation system, wherein the first medium-voltage switch cabinet is electrically connected with a traction transformer, the traction transformer is electrically connected with a rectifier cabinet, the positive terminal of the rectifier cabinet is connected to a contact network sequentially through a direct-current incoming cabinet and a direct-current feeder cabinet, and the negative terminal of the rectifier cabinet is connected to a return current rail through a negative cabinet;
the subway traction power transformation system further comprises a second medium-voltage switch cabinet which supplies power by replacing AC35KV voltage of a subway traction power transformation system with civil voltage of AC380V, wherein the second medium-voltage switch cabinet is electrically connected with a step-down transformer and a low-voltage incoming line cabinet in sequence, and the low-voltage incoming line cabinet is respectively connected with an AC/DC screen and electric equipment through two low-voltage feeder cabinets.
Preferably, be provided with the voltage relay protection module that has the voltage test box in first medium voltage switchgear or the second medium voltage switchgear, the voltage test box input inserts through voltage transformer first medium voltage switchgear or the second medium voltage switchgear's in the circuit of AC380V, the voltage relay protection module inserts the output of voltage test box, the voltage test box includes adjustable voltage divider and experimental voltage divider, the wiring end one end of voltage relay protection module is connected with the experimental switch of voltage linkage, and the other end is connected voltage transformer wiring end, voltage transformer wiring end other end is connected adjustable voltage divider and experimental voltage divider, the experimental switch other end of voltage linkage connect adjustable voltage divider or experimental voltage divider.
Preferably, still be provided with the current relay protection module that has the current test box in first medium voltage switchgear or the second medium voltage switchgear, the current test box input inserts through current transformer first medium voltage switchgear or the second medium voltage switchgear's AC 380V's circuit in, current relay protection module inserts the current test box's output, the wiring end both ends of current relay protection module all are connected with current linkage test switch, current linkage test switch incoming end links to each other or is connected with adjustable current source with the access of current test box.
Preferably, the access end of the current test box is further connected with a voltage limiting protection circuit.
Preferably, an isolation switch cabinet is connected to a circuit connecting the direct current feeder cabinet and the contact network.
Preferably, the traction transformer adopts a phase-shifting and splitting transformer with 3-phase input voltage of AC380V, 6-phase output voltage of AC36V and capacity of 2 KVA.
Compared with the prior art, the invention provides a subway traction power transformation system training platform, which has the following beneficial effects:
1. according to the subway traction transformation system training platform, the highest voltage level is set to be AC380V, namely the electricity utilization level of domestic production and civil electricity in China, namely AC380V voltage replaces original AC35kV voltage, power is supplied to the first medium-voltage switch cabinet and the second medium-voltage switch cabinet, the direct-current voltage sides of the direct-current inlet cabinet and the negative electrode cabinet are set to be DC48V through the first medium-voltage switch cabinet, the traction transformer and the rectifier cabinet, namely DC48V replaces DC1500V, the voltage level is ensured, and the use safety is ensured; voltage and current simulation mode: the acquisition elements are processed in the first medium-voltage switch cabinet and the second medium-voltage switch cabinet on the information acquisition side, so that acquired AC380V voltage signals are converted into corresponding AC35kV signals to be transmitted to the voltage relay protection module and the current relay protection module, and meanwhile, the voltage test box and the current test box of the acquisition elements are designed to be adjustable, so that fault simulation is facilitated.
Drawings
Fig. 1 is a system diagram of a traction power transformation part of a subway traction power transformation system training platform provided by the invention;
FIG. 2 is a system diagram of a voltage reduction and power transformation part of a subway traction power transformation system training platform provided by the invention;
FIG. 3 is a schematic circuit diagram of a voltage test box of a subway traction power transformation system training platform according to the present invention;
fig. 4 is a schematic circuit diagram of a current test box of the subway traction power transformation system training platform provided by the invention.
In the figure: 1. a first medium voltage switchgear; 2. a traction transformer; 3. a rectifier cabinet; 4. a direct current inlet cabinet; 5. a DC feeder cabinet; 6. a catenary; 7. a negative electrode cabinet; 8. a return track; 9. a voltage test box; 10. a voltage relay protection module; 11. a voltage transformer; 12. an adjustable voltage divider; 13. a test voltage divider; 14. a voltage linkage test switch; 15. a current test box; 16. a current relay protection module; 17. a current transformer; 18. a current linkage test switch; 19. an adjustable current source; 20. a voltage limiting protection circuit; 21. an isolation switch cabinet; 22. a second medium voltage switchgear; 23. a step-down transformer; 24. a low-voltage incoming cabinet; 25. a low voltage feeder cabinet; 26. an AC/DC screen; 27. an electric device.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a subway traction power transformation system training platform comprises a first medium-voltage switch cabinet 1 which supplies power by replacing AC35KV voltage of a subway traction power transformation system with civil voltage of AC380V, wherein the first medium-voltage switch cabinet 1 is electrically connected with a traction transformer 2, the traction transformer 2 is electrically connected with a rectifier cabinet 3, the positive end of the rectifier cabinet 3 is connected to a contact network 6 through a direct-current inlet cabinet 4 and a direct-current feeder cabinet 5 in sequence, and the negative end of the rectifier cabinet 3 is connected to a return current rail 8 through a negative electrode cabinet 7;
The system also comprises a second medium-voltage switch cabinet 22 which adopts the civil voltage of AC380V to replace the AC35KV voltage of a subway traction power transformation system for power supply, the second medium-voltage switch cabinet 22 is electrically connected with a step-down transformer 23 and a low-voltage incoming line cabinet 24 in sequence, and the low-voltage incoming line cabinet 24 is respectively connected with an AC/DC screen 26 and electric equipment 27 through two low-voltage feeder cabinets 25;
the highest voltage level is set to be AC380V, namely the electricity utilization level of domestic electricity and production in China, namely, AC380V voltage is used for replacing original AC35kV voltage to supply power to the first medium-voltage switch cabinet 1 and the second medium-voltage switch cabinet 22, the direct-current voltage sides of the direct-current incoming line cabinet 4 and the negative pole cabinet 7 are set to be DC48V through the first medium-voltage switch cabinet 1, the traction transformer 2 and the rectifier cabinet 3, namely DC48V is used for replacing DC1500V, the voltage level is ensured, and the use safety is ensured; voltage and current simulation mode: the acquisition elements are processed in the first medium-voltage switch cabinet 1 and the second medium-voltage switch cabinet 22 at the information acquisition side, so that acquired AC380V voltage signals are converted into corresponding AC35kV signals to be transmitted to the voltage relay protection module 10 and the current relay protection module 16, and meanwhile, the voltage test box 9 and the current test box 15 of the acquisition elements are designed to be adjustable, so that fault simulation is facilitated.
A voltage relay protection module 10 with a voltage test box 9 is arranged in the first medium-voltage switch cabinet 1 or the second medium-voltage switch cabinet 22, the input end of the voltage test box 9 is connected into a circuit of AC380V of the first medium-voltage switch cabinet 1 or the second medium-voltage switch cabinet 22 through a voltage transformer 11, the voltage relay protection module 10 is connected to the output end of the voltage test box 9, the voltage test box 9 comprises an adjustable voltage divider 12 and a test voltage divider 13, one end of a terminal of the voltage relay protection module 10 is connected with a voltage linkage test switch 14, the other end of the terminal of the voltage transformer 11 is connected with one end of the terminal of the voltage transformer 11, the other end of the terminal of the voltage transformer 11 is connected with the adjustable voltage divider 12 and the test voltage divider 13, and the other end of the voltage linkage test switch 14 is connected with the adjustable voltage divider 12 or the test voltage divider 13; can adjust the voltage at voltage relay protection module 10 both ends through adjustable voltage divider 12, accessible voltage linkage test switch 14 will test voltage divider 13 switch-on when carrying out the fault simulation to analog voltage is too high or low excessively, carries out the fault simulation, and detects out through voltage relay protection module 10, thereby the student of being convenient for learns.
A current relay protection module 16 with a current test box 15 is further arranged in the first medium-voltage switch cabinet 1 or the second medium-voltage switch cabinet 22, the input end of the current test box 15 is connected into the circuit of AC380V of the first medium-voltage switch cabinet 1 through a current transformer 17, the current relay protection module 16 is connected into the output end of the current test box 15, two ends of the wiring end of the current relay protection module 16 are both connected with a current linkage test switch 18, and the connection end of the current linkage test switch 18 is connected with the connection of the current test box 15 or connected with an adjustable current source 19; the adjustable current source 19 is switched on through the current linkage test switch 18, so that the current is adjusted, and the current fault is simulated.
The current test box 15 works specifically as follows, for example, in the actual operation process of the subway, the current relay protection module 16 in the first medium voltage switch cabinet 1 or the second medium voltage switch cabinet 22 adopts a relay of 630A, and the current transformer 17 is 100: 1, setting the ratio as 100: 1, namely when the system is fully loaded, the current at the input side of the current relay protection module 16 is 0.65A, after proportional conversion, the current relay protection module 16 knows that the current of the system is 65A, and simultaneously displays 65A on a human-computer interface; in the platform, because the voltage is converted from AC35KV to AC380V, the current is 5A when the system is fully loaded, and the current transformer 17 is changed to be 7.5: 1, and relay ratio setting hold 100: 1 is unchanged, so that when the system is fully loaded, the relay input side current is 0.667A, and after scaling, the display is 66.7A, so that the running current of the platform is converted into the current close to the running current in the actual project, so that the parameters in relay protection can run according to the actual parameters, and the voltage adopts the same processing method to obtain the value of AC35kV by using the voltage of AC 380V.
The access end of the current test box 15 is also connected with a voltage limiting protection circuit 20 for performing open-circuit protection, so that the current transformer 17 is prevented from being broken down due to open circuit when the current linkage test switch 18 is opened and closed and is in an open-circuit state, and the use safety is ensured.
The circuit that DC feeder cabinet 5 and contact net 6 are connected is connected with isolator cabinet 21 on, is convenient for carry out control switch.
The traction transformer 2 adopts a phase-shifting and splitting transformer with 3-phase input voltage of AC380V, 6-phase output voltage of AC36V and capacity of 2 KVA.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The subway traction power transformation system training platform is characterized by comprising a first medium-voltage switch cabinet (1) which supplies power by replacing AC35KV voltage of a subway traction power transformation system with civil voltage of AC380V, wherein the first medium-voltage switch cabinet (1) is electrically connected with a traction transformer (2), the traction transformer (2) is electrically connected with a rectifier cabinet (3), the positive end of the rectifier cabinet (3) is connected to a contact net (6) through a direct-current incoming cabinet (4) and a direct-current feeder cabinet (5) in sequence, and the negative end of the rectifier cabinet (3) is connected to a return rail (8) through a negative electrode cabinet (7);
the subway traction transformer system is characterized by further comprising a second medium-voltage switch cabinet (22) which supplies power by replacing AC35KV voltage of a subway traction power transformation system with civil voltage of AC380V, wherein the second medium-voltage switch cabinet (22) is sequentially and electrically connected with a step-down transformer (23) and a low-voltage incoming line cabinet (24), and the low-voltage incoming line cabinet (24) is respectively connected with an AC/DC screen (26) and electric equipment (27) through two low-voltage feeder cabinets (25);
Still be provided with current relay protection module (16) that have current test box (15) in first medium voltage switch cabinet (1) or second medium voltage switch cabinet (22), current test box (15) input is passed through current transformer (17) and is inserted first medium voltage switch cabinet (1) or the circuit of AC380V of second medium voltage switch cabinet (22) in, current relay protection module (16) insert the output of current test box (15), the wiring terminal both ends of current relay protection module (16) all are connected with current linkage test switch (18), current linkage test switch (18) incoming end links to each other or is connected with adjustable current source (19) with the access of current test box (15).
2. The subway traction transformation system training platform as claimed in claim 1, wherein a voltage relay protection module (10) with a voltage test box (9) is arranged in the first medium voltage switch cabinet (1) or the second medium voltage switch cabinet (22), an input end of the voltage test box (9) is connected to an AC380V circuit of the first medium voltage switch cabinet (1) or the second medium voltage switch cabinet (22) through a voltage transformer (11), the voltage relay protection module (10) is connected to an output end of the voltage test box (9), the voltage test box (9) comprises an adjustable voltage divider (12) and a test voltage divider (13), one end of a terminal of the voltage relay protection module (10) is connected to a voltage linkage test switch (14), and the other end of the terminal is connected to one end of the voltage transformer (11), the other end of the terminal of the voltage transformer (11) is connected with the adjustable voltage divider (12) and the test voltage divider (13), and the other end of the voltage linkage test switch (14) is connected with the adjustable voltage divider (12) or the test voltage divider (13).
3. The subway traction transformation system training platform as claimed in claim 1, wherein a voltage limiting protection circuit (20) is further connected to an access end of the current test box (15).
4. The subway traction transformation system training platform according to any one of claims 1-2, wherein an isolation switch cabinet (21) is connected to a line connecting the direct current feeder cabinet (5) and the contact network (6).
5. A subway traction power transformation system training platform as claimed in any one of claims 1-2, wherein said traction transformer (2) adopts a phase-shifting, split-phase transformer with 3-phase input voltage AC380V, 6-phase output voltage AC36V and capacity of 2 KVA.
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