CN216611189U - Direct current transmission diesel locomotive power control system - Google Patents
Direct current transmission diesel locomotive power control system Download PDFInfo
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- CN216611189U CN216611189U CN202123380567.0U CN202123380567U CN216611189U CN 216611189 U CN216611189 U CN 216611189U CN 202123380567 U CN202123380567 U CN 202123380567U CN 216611189 U CN216611189 U CN 216611189U
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- power supply
- locomotive
- mode selection
- microcomputer
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Abstract
The utility model relates to a power control system of a direct-current transmission diesel locomotive, and belongs to the field of control systems of direct-current transmission diesel locomotives. It comprises the following steps: the system comprises a tachogenerator (1), a power regulation resistor (2), a mode selection universal switch (3), a traction exciter (4) and a synchronous main generator (5); the 'oil motor excitation', 'microcomputer excitation' and 'cylinder switching excitation' 3 excitation modes are manually selected according to the state of the locomotive. The microcomputer excitation is adopted in the normal state, and the locomotive is not passed through a tachogenerator, so that the starting acceleration performance of the locomotive is ensured; when the 'microcomputer excitation' system fails, the 'oil motor excitation' is switched to, the locomotive can still normally carry out constant power control, and the redundancy of the whole vehicle excitation system is ensured; when the performance of the diesel engine is reduced, a cylinder-cutting excitation mode can be switched to, the synchronous main generator is operated in a power-reducing mode, and a diesel engine system is protected.
Description
Technical Field
The utility model belongs to the field of direct-current transmission diesel locomotive control systems, and particularly relates to a direct-current transmission diesel locomotive power control system.
Background
The constant power control of the diesel locomotive means that a driver controller main handle of the locomotive is unchanged in the running process, and the diesel engine continuously changes along with the running resistance of a train at a certain rotating speed, so that the output current and voltage of a synchronous main generator can meet the requirement of constant power, and the power of the diesel engine is fully utilized. The output current of the synchronous main generator through the traction rectifier cabinet depends on the running resistance (mainly ramp resistance) of the train, and the output voltage of the rectified synchronous main generator is in direct proportion to the rotating speed of the motor and the excitation magnetic flux. At a fixed rotating speed (the rotating speed of the diesel engine is constant), the only one which can be manually adjusted is the excitation magnetic flux of the synchronous main generator, and the magnetic flux depends on the excitation current, so that the synchronous main generator realizes the adjustment of the constant power characteristic and is actually the adjustment of the excitation current.
An electric transmission internal combustion locomotive of east wind 4C, east wind 4D passenger transport, east wind 5B, GKD1, east wind 4B and the like is provided with an excitation system using an excitation regulator. And an excitation system combining an excitation regulator and oil motor excitation is adopted, so that the constant power control is performed on the locomotive. These locomotives have significantly improved start-up acceleration performance as compared with conventional locomotives.
However, if the tachogenerator fails, the locomotive can only work by fault excitation, which easily causes the problem of machine breakage.
With the rapid development of microcomputer systems, many electrically-driven diesel locomotives cancel an oil motor excitation system and change the oil motor excitation system into a dual-backup microcomputer excitation system, and the constant output power control, the limited output voltage control and the limited output current control of a main generator at any diesel engine rotating speed are realized by detecting the diesel engine rotating speed and controlling the magnitude of the excitation current, so that the starting and speed regulation performance of the locomotive is greatly improved.
When the performance of the diesel engine is reduced (for example, the fuel injector is badly atomized or a certain cylinder is damaged), the power generated by the diesel engine cannot reach a specified value, and if the microcomputer system cannot know the state of the diesel engine at the moment, the output electric power of the main generator still keeps the value of the normal diesel engine, the phenomenon of hunting can occur, and even the diesel engine fault is caused.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The technical problem to be solved by the utility model is as follows: the power control system of the direct-current transmission diesel locomotive solves the problem that the locomotive can only work by fault excitation and is easy to break if a tachogenerator fails in the existing excitation system scheme.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a power control system for a direct current transmission diesel locomotive, the control system is externally connected with a 110V power supply, and the power control system for the direct current transmission diesel locomotive comprises: the system comprises a tachogenerator 1, a power regulation resistor 2, a mode selection universal switch 3, a traction exciter 4 and a synchronous main generator 5;
two connecting paths are arranged between the anode of the external power supply and the cathode of the power supply;
the first connection path is set to be that the anode of an external power supply is connected with a power adjusting resistor 2, the power adjusting resistor 2 is connected with a tachogenerator 1, and the tachogenerator is connected with the cathode of the power supply through a mode selection universal switch 3;
the second connection path is set as that the positive pole of the external power supply is connected with the traction exciter 4, and the traction exciter 4 is connected with the negative pole of the external power supply through the mode selection universal switch 3;
the traction exciter 4 is also connected to a synchronous main generator 5.
The tachogenerator 1 is provided with an excitation winding 11 and an output winding 12;
the mode selection universal switch 3 comprises three gear contacts, namely a cylinder switching gear contact, an oil motor excitation gear contact and a microcomputer excitation gear contact;
when the mode selection universal switch 3 is switched on the microcomputer excitation gear contact, the positive pole of the external power supply and the negative pole of the power supply are connected through a second connection path;
when the mode selection universal switch 3 is connected with an oil motor excitation gear contact, a first connection path is formed between the anode of the external power supply and the cathode of the power supply;
when the mode selection universal switch 3 is switched on to switch the cylinder gear contact, the anode of the external power supply and the cathode of the power supply pass through a second connection path.
Wherein, the control system also comprises a microcomputer system 6;
the microcomputer system 6 is connected with a mode selection universal switch 3.
(III) advantageous effects
Compared with the prior art, the utility model has the following beneficial effects: the 'oil motor excitation', 'microcomputer excitation' and 'cylinder switching excitation' 3 excitation modes are manually selected according to the state of the locomotive. The microcomputer excitation is adopted in the normal state, and the starting acceleration performance of the locomotive is ensured without passing through a tachogenerator; when the 'microcomputer excitation' system fails, the 'oil motor excitation' is switched to, the locomotive can still normally carry out constant power control, and the redundancy of the whole vehicle excitation system is ensured; when the performance of the diesel engine is reduced, a cylinder-cutting excitation mode can be switched to, the synchronous main generator is operated in a power-reducing mode, and a diesel engine system is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a microcomputer excitation mode gear selected by the universal switch;
FIG. 3 is a schematic diagram of the oil motor excitation mode when the universal switch selects the gear position;
fig. 4 is a schematic diagram of the cylinder excitation mode gear position when the universal switch selects the switching cylinder.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the above problem, the present embodiment provides a power control system of a direct current transmission diesel locomotive, the control system is externally connected with a 110V power supply, the power control system of the direct current transmission diesel locomotive includes: the system comprises a tachogenerator 1, a power regulation resistor 2, a mode selection universal switch 3, a traction exciter 4 and a synchronous main generator 5;
two connecting paths are arranged between the anode of the external power supply and the cathode of the power supply;
the first connection path is set to be that the anode of an external power supply is connected with a power adjusting resistor 2, the power adjusting resistor 2 is connected with a tachogenerator 1, and the tachogenerator is connected with the cathode of the power supply through a mode selection universal switch 3;
the second connection path is set as that the positive pole of the external power supply is connected with the traction exciter 4, and the traction exciter 4 is connected with the negative pole of the external power supply through the mode selection universal switch 3;
the traction exciter 4 is also connected to a synchronous main generator 5.
The tachogenerator 1 is provided with an excitation winding 11 and an output winding 12;
the mode selection universal switch 3 comprises three gear contacts, namely a cylinder switching gear contact, an oil motor excitation gear contact and a microcomputer excitation gear contact;
when the mode selection universal switch 3 is switched on the microcomputer excitation gear contact, the positive pole of the external power supply and the negative pole of the power supply are connected through a second connection path;
when the mode selection universal switch 3 is connected with an oil motor excitation gear contact, a first connection path is formed between the anode of the external power supply and the cathode of the power supply;
when the mode selection universal switch 3 is switched on to switch the cylinder gear contact, the anode of the external power supply and the cathode of the power supply pass through a second connection path.
Wherein, the control system also comprises a microcomputer system 6;
the microcomputer system 6 is connected with a mode selection universal switch 3.
The driver manually selects 3 excitation modes of 'oil motor excitation', 'microcomputer excitation' and 'cylinder switching excitation' according to the state of the locomotive through the universal switch 3. The microcomputer excitation is adopted in the normal state, and the starting acceleration performance of the locomotive is ensured without passing through a tachogenerator; when the 'microcomputer excitation' system fails, the 'oil motor excitation' is switched to, the locomotive can still normally carry out constant power control, and the redundancy of the whole vehicle excitation system is ensured; when the performance of the diesel engine is reduced, a cylinder-cutting excitation mode can be switched to, the synchronous main generator is operated in a power-reducing mode, and a diesel engine system is protected.
In summary, the working principle of the utility model is as follows:
1. when the locomotive normally works, as shown in fig. 2, a microcomputer excitation mode is selected through the universal switch 3, at this time, the microcomputer system 6 receives a diesel engine rotating speed signal 64, a main power generation voltage signal 65 and a main power generation current signal 66, compares the signals with various reference values stored in the microcomputer system 6, controls the excitation current according to a logic judgment result, and finally controls the working current, the voltage and the output power of the synchronous main generator within a specified range to realize the constant power regulation of the main generator.
2. When the locomotive microcomputer excitation system has a fault, as shown in fig. 3, the oil motor excitation mode is selected through the universal switch 3, the rotor 12 of the tachogenerator 1 is driven by the diesel engine to rotate, the excitation winding 11 of the tachogenerator is excited by the on-board 110V power supply, and the tachogenerator 1 generates electricity and provides excitation current for the excitation winding 41 of the traction exciter 4. The rotor of the traction exciter 4 is driven by the diesel engine to rotate, the exciting winding 41 of the traction exciter is provided with exciting current by the tachogenerator 1, so that the exciter generates three-phase alternating current, and the three-phase alternating current is rectified by the rectifying device in the traction exciter 4 and then provides exciting current for the exciting winding 51 of the synchronous main generator 5.
Under the mode of 'oil motor excitation', the power adjusting resistor 1 can automatically adjust the resistance value of the diesel engine according to the rotating speed of the diesel engine by using a linkage mechanism, and the main generator is controlled to generate power with proper magnitude by adjusting the RGT under each rotating speed of the diesel engine, so that the diesel engine always works on a constant oil supply line. At the moment, the efficiency is high, and the economic performance is good. When the speed, the degree of curvature of the road, the gradient, etc. are constantly changing due to the locomotive running, that is to say the resistance is always changing, of course the power of the main generator providing the tractive force will also change.
3. When the performance of the diesel engine is reduced or the diesel engine has a fault, as shown in fig. 4, a cylinder switching mode is selected through the universal switch 3, an excitation circuit of the cylinder switching mode is completely the same as an excitation circuit of a microcomputer, only a cylinder switching instruction 61 is given to the microcomputer system 6 through the universal switch 3, and at the moment, the microcomputer system controls the output power of a main engine to be reduced. The output electric power of the main generator is adjusted to a proper value, so that the phenomenon of the diesel engine that the rotating speed is reduced or fluctuates due to overload or sudden load change to cause the phenomenon of vehicle traveling is avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides a direct current transmission diesel locomotive power control system, the external 110V power of control system, its characterized in that, direct current transmission diesel locomotive power control system includes: the system comprises a tachogenerator (1), a power regulation resistor (2), a mode selection universal switch (3), a traction exciter (4) and a synchronous main generator (5);
two connecting paths are arranged between the anode of the external power supply and the cathode of the power supply;
the first connection path is set to be that the anode of an external power supply is connected with a power adjusting resistor (2), the power adjusting resistor (2) is connected with a tachogenerator (1), and the tachogenerator is connected with the cathode of the power supply through a mode selection universal switch (3);
the second connection path is set to be that the positive pole of the external power supply is connected with the traction exciter (4), and the traction exciter (4) is connected with the negative pole of the external power supply through the mode selection universal switch (3);
the traction exciter (4) is also connected with a synchronous main generator (5).
2. The power control system of the direct-current transmission diesel locomotive according to claim 1, characterized in that said tachogenerator (1) is provided with an excitation winding (11), an output winding (12);
the mode selection universal switch (3) comprises three gear contacts, namely a cylinder cutting gear contact, an oil motor excitation gear contact and a microcomputer excitation gear contact;
when the mode selection universal switch (3) is connected with the microcomputer excitation gear contact, the anode of the external power supply and the cathode of the power supply are connected through a second connection path;
when the mode selection universal switch (3) is connected with an oil motor excitation gear contact, a first connection path is formed between the anode of the external power supply and the cathode of the power supply;
when the mode selection universal switch (3) is switched on to switch the cylinder gear contact, the positive pole of the external power supply and the negative pole of the power supply are connected through a second connection path.
3. The direct drive diesel locomotive power control system according to claim 1, characterized in that said control system further comprises a microcomputer system (6);
the microcomputer system (6) is connected with the mode selection universal switch (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123380567.0U CN216611189U (en) | 2021-12-30 | 2021-12-30 | Direct current transmission diesel locomotive power control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123380567.0U CN216611189U (en) | 2021-12-30 | 2021-12-30 | Direct current transmission diesel locomotive power control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216611189U true CN216611189U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202123380567.0U Active CN216611189U (en) | 2021-12-30 | 2021-12-30 | Direct current transmission diesel locomotive power control system |
Country Status (1)
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| CN (1) | CN216611189U (en) |
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2021
- 2021-12-30 CN CN202123380567.0U patent/CN216611189U/en active Active
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