CN109488468B - Control method, device, medium and equipment for output power of double internal combustion engine sets - Google Patents
Control method, device, medium and equipment for output power of double internal combustion engine sets Download PDFInfo
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- CN109488468B CN109488468B CN201910016353.3A CN201910016353A CN109488468B CN 109488468 B CN109488468 B CN 109488468B CN 201910016353 A CN201910016353 A CN 201910016353A CN 109488468 B CN109488468 B CN 109488468B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D25/00—Controlling two or more co-operating engines
Abstract
The application discloses a method, a device, a medium and equipment for controlling output power of double internal combustion engine sets, wherein the method comprises the following steps: judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set; if yes, operating the first internal combustion engine set and the second internal combustion engine set; converting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set into first direct current and second direct current; adjusting the voltage values of the first direct current and the second direct current to be consistent; when the first internal combustion engine set and the second internal combustion engine set realize direct current grid connection, three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set is adjusted, so that the sum of output power output by the first internal combustion engine set and the second internal combustion engine set is the target power. Therefore, the method can flexibly adjust the output power of the first internal combustion engine set and the output power of the second internal combustion engine set in the double internal combustion engine sets.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a method, a device, a medium and equipment for controlling output power of double internal combustion engine sets.
Background
In the technical field of rail transit, the double internal combustion engine set has been practically applied due to the wide output power range. If the target power required to be output by the double internal combustion engine sets is larger than the rated output power of a single internal combustion engine set in the double internal combustion engine sets, the two internal combustion engine sets in the double internal combustion engine sets are required to operate simultaneously, and then the double internal combustion engine sets can output the target power. However, since the first internal combustion engine set and the second internal combustion engine set in the dual internal combustion engine set output three-phase alternating currents, the first internal combustion engine set and the second internal combustion engine set can achieve alternating current grid connection only under the condition that the power supply frequency, the voltage value, the phase sequence and the phase of the three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set are consistent. However, under the condition that the first internal combustion engine set and the second internal combustion engine set are connected in an alternating-current grid mode, the output power of each of the first internal combustion engine set and the second internal combustion engine set cannot be flexibly adjusted, and only when the first internal combustion engine set and the second internal combustion engine set are always synchronously operated, the double internal combustion engine sets can output the target power, so that the operation mode of the output power of the double internal combustion engine sets is single.
Therefore, how to provide a better control method for output power of dual internal combustion engines, so that the dual internal combustion engines can output target power and simultaneously can flexibly adjust the respective output power of the first internal combustion engine set and the second internal combustion engine set in the dual internal combustion engines, is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method, an apparatus, a medium, and a device for controlling output power of dual internal combustion engines, so that the dual internal combustion engines can output a target power and simultaneously can flexibly adjust output power of a first internal combustion engine set and output power of a second internal combustion engine set in the dual internal combustion engines. The specific scheme is as follows:
a control method for output power of double internal combustion engine sets comprises the following steps:
judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
if yes, operating a first internal combustion engine set and a second internal combustion engine set in the target double internal combustion engine sets;
converting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set into first direct current and second direct current by using a first controllable rectifier and a second controllable rectifier respectively; wherein the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
adjusting the voltage values of the first direct current and the second direct current to be consistent so as to realize direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
when the direct current grid connection is realized by the first internal combustion engine set and the second internal combustion engine set, three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set are adjusted, so that the sum of output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power.
Preferably, after the process of determining whether the target power required to be output by the target dual internal combustion engine set is greater than the rated output power of the single internal combustion engine set in the target dual internal combustion engine set, the method further includes:
if not, operating the first internal combustion engine set or the second internal combustion engine set so as to enable the first internal combustion engine set or the second internal combustion engine set to output the target power.
Preferably, after the process of determining whether the target power required to be output by the target dual internal combustion engine set is greater than the rated output power of the single internal combustion engine set in the target dual internal combustion engine set, the method further includes:
if not, alternately operating the first internal combustion engine set or the second internal combustion engine set in a preset period to enable the first internal combustion engine set or the second internal combustion engine set to output the target power.
Preferably, the adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power includes:
adjusting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the first internal combustion engine set and the second internal combustion engine set output first power and second power respectively; wherein the first power is a rated output power of the first internal combustion engine set; the second power is a difference between the target power and a rated output power of the first internal combustion engine group.
Preferably, after the process of adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power, the method further includes:
when the power required to be output by the target double internal combustion engine sets is reduced to zero from the target power, controlling the first internal combustion engine set to reduce the power output;
and when the output power of the first internal combustion engine set is zero, controlling the second internal combustion engine set to carry out power reduction output until the output power of the second internal combustion engine set is zero.
Correspondingly, the invention also discloses a control device for the output power of the double internal combustion engine sets, which comprises the following components:
the power judgment module is used for judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
the unit operation module is used for operating a first internal combustion unit and a second internal combustion unit in the target double internal combustion unit if the unit operation module is used for operating the target double internal combustion unit;
the current conversion module is used for converting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set into first direct current and second direct current by utilizing a first controllable rectifier and a second controllable rectifier respectively; wherein the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
the current adjusting module is used for adjusting the voltage values of the first direct current and the second direct current to be consistent so as to realize direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
and the power output module is used for adjusting the three-phase alternating current output by the first internal combustion engine set and the three-phase alternating current output by the second internal combustion engine set when the direct current grid connection is realized by the first internal combustion engine set and the second internal combustion engine set, so that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power.
Preferably, the method further comprises the following steps:
the alternate operation module is used for alternately operating the first internal combustion engine set or the second internal combustion engine set according to a preset period to enable the first internal combustion engine set or the second internal combustion engine set to output the target power if the target power required to be output by the target double internal combustion engine set is smaller than the rated output power of a single internal combustion engine set in the target double internal combustion engine set.
Preferably, the method further comprises the following steps:
the first power reducing module is used for adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power, and when the power required to be output by the target double internal combustion engine set is reduced to zero from the target power, the first internal combustion engine set is controlled to reduce the power output;
and the second power reducing module is used for controlling the second internal combustion engine set to reduce power output when the output power of the first internal combustion engine set is zero until the output power of the second internal combustion engine set is zero.
Accordingly, the present invention also discloses a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for controlling the output power of a dual internal combustion engine group as disclosed in the foregoing.
Correspondingly, the invention also discloses a control device for the output power of the double internal combustion engine sets, which comprises:
a memory for storing a computer program;
a processor for implementing the steps of the method for controlling the output power of a dual combustion engine group as disclosed in the foregoing when executing said computer program.
In the invention, firstly, whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set is judged, if so, a first internal combustion engine set and a second internal combustion engine set in the target double internal combustion engine set are operated, and the three-phase alternating current output by the first internal combustion engine set and the three-phase alternating current output by the second internal combustion engine set are converted into a first direct current and a second direct current by using a first controllable rectifier and a second controllable rectifier respectively. And then, the voltage values of the first direct current and the second direct current are adjusted to be consistent, so that direct current grid connection of the first internal combustion engine set and the second internal combustion engine set can be realized. When the first internal combustion engine set and the second internal combustion engine set realize direct current grid connection, only the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is required to be the target power, and the first internal combustion engine set and the second internal combustion engine set are not required to be synchronously operated all the time. Compared with the prior art, when the double internal combustion engines output the target power, the first internal combustion engine set and the second internal combustion engine set are required to operate synchronously all the time, and the method provided by the invention can be used for adjusting the output power output by the first internal combustion engine set and the second internal combustion engine set, so that the operating modes of the output power of the first internal combustion engine set and the output power of the second internal combustion engine set are more flexible and diversified. Correspondingly, the locomotive control device, the medium and the equipment of the double internal combustion engine sets have the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for controlling a locomotive with dual internal combustion engine sets according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a locomotive control circuit for a dual internal combustion engine set according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an operation mode selection of a dual internal combustion engine set according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a first internal combustion engine set of a dual internal combustion engine set provided by an embodiment of the present invention being put into operation;
FIG. 5 is a schematic illustration of a first engine set and a second engine set simultaneously operating in accordance with an embodiment of the present invention;
FIG. 6 is a schematic illustration of a first internal combustion engine set operating in an automatic mode of operation according to an embodiment of the present disclosure;
FIG. 7 is a schematic illustration of a second engine set being placed into operation in an automatic operation control mode, as provided by an embodiment of the present invention;
FIG. 8 is a schematic illustration of the combined operating power of the first and second engine sets in an automatic operation control mode, as provided by an embodiment of the present invention;
fig. 9 is a structural diagram of a locomotive control device of a dual internal combustion engine set according to an embodiment of the present invention;
fig. 10 is a structural diagram of a locomotive control device of a dual internal combustion engine set according to an embodiment of the present invention.
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. 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.
As shown in fig. 1, an embodiment of the present invention discloses a locomotive control method for a dual internal combustion engine set, including:
step S11: judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
step S12: if yes, operating a first internal combustion engine set and a second internal combustion engine set in the target double internal combustion engine sets;
it can be understood that when the target power required to be output by the target dual internal combustion engine set is greater than the rated output power of the single internal combustion engine set in the target dual internal combustion engine set, it is necessary to operate the first internal combustion engine set and the second internal combustion engine set in the target dual internal combustion engine set simultaneously to enable the target dual internal combustion engine set to output the target power greater than the rated output power of the single internal combustion engine set.
Step S13: converting three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set into a first direct current and a second direct current by using a first controllable rectifier and a second controllable rectifier respectively;
the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
because the first internal combustion engine set and the second internal combustion engine set output three-phase alternating currents, in this embodiment, in order to implement direct current grid connection of the first internal combustion engine set and the second internal combustion engine set, the first controllable rectifier and the second controllable rectifier are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance, and then the three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set are respectively converted into a first direct current and a second direct current by the first controllable rectifier and the second controllable rectifier.
When the first controllable rectifier and the second controllable rectifier are used for respectively converting three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set into a first direct current and a second direct current, the first internal combustion engine set and the second internal combustion engine set can be connected to the grid-connected mode without waiting until power supply voltage values, phase sequences and phases of the three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set are consistent in the process of connecting the first internal combustion engine set and the second internal combustion engine set to the grid-connected mode.
Step S14: adjusting the voltage values of the first direct current and the second direct current to be consistent so as to realize direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
because the three-phase alternating current output by the first internal combustion engine set and the three-phase alternating current output by the second internal combustion engine set are converted into the first direct current and the second direct current through the first controllable rectifier and the second controllable rectifier, if the first internal combustion engine set and the second internal combustion engine set are connected to the grid, the first internal combustion engine set and the second internal combustion engine set can be connected to the grid only by adjusting the voltage values of the first direct current and the second direct current to be consistent, namely, the direct current grid connection of the first internal combustion engine set and the second internal combustion engine set is realized. After the first internal combustion engine set and the second internal combustion engine set are simultaneously connected to the grid, the first internal combustion engine set and the second internal combustion engine set can respectively provide corresponding output power, so that the target double internal combustion engine set can output target power larger than rated output power of a single internal combustion engine set.
In the process of adjusting the voltage values of the first direct current and the second direct current to be consistent, the voltage value of the first direct current may be adjusted to be consistent with the voltage value of the second direct current by the first controllable rectifier, or the voltage value of the second direct current may be adjusted to be consistent with the voltage value of the first direct current by the second controllable rectifier, and here, the process of adjusting the voltage values of the first direct current and the second direct current to be consistent is not particularly limited.
Step S15: when the first internal combustion engine set and the second internal combustion engine set realize direct current grid connection, three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set is adjusted, so that the sum of output power output by the first internal combustion engine set and the second internal combustion engine set is the target power.
It can be understood that when the first internal combustion engine set and the second internal combustion engine set are connected to the grid in a direct current grid-connected manner, the target power which is larger than the rated output power of a single internal combustion engine set can be output by the first internal combustion engine set and the second internal combustion engine set together. That is, the first internal combustion engine set and the second internal combustion engine set may output 50% of the target power, 80% of the target power output by the first internal combustion engine set, 20% of the target power output by the second internal combustion engine set, 70% of the target power output by the first internal combustion engine set, and 30% of the target power output by the second internal combustion engine set, respectively. In other words, in the present embodiment, the specific values of the output powers output by the first internal combustion engine set and the second internal combustion engine set are not particularly limited in the present embodiment as long as the final result can make the sum of the output powers output by the first internal combustion engine set and the second internal combustion engine set the target power. Obviously, by the method in the embodiment, the operation modes of the output power of the first internal combustion engine set and the output power of the second internal combustion engine set can be more flexible and diversified, so that the performance advantages of the target double internal combustion engine sets can be fully exerted.
In addition, in the embodiment, since the first internal combustion engine set and the second internal combustion engine set are connected to the grid in a direct current manner, the first internal combustion engine set and the second internal combustion engine set can be sequentially connected to the grid or disconnected from the grid according to the needs of actual conditions by the grid connection manner of the first internal combustion engine set and the second internal combustion engine set.
In this embodiment, it can be seen that, firstly, it is determined whether the target power required to be output by the target dual internal combustion engine set is greater than the rated output power of a single internal combustion engine set in the target dual internal combustion engine set, if so, the first internal combustion engine set and the second internal combustion engine set in the target dual internal combustion engine set are operated, and the three-phase alternating current output by the first internal combustion engine set and the three-phase alternating current output by the second internal combustion engine set are converted into the first direct current and the second direct current by using the first controllable rectifier and the second controllable rectifier, respectively. And then, the voltage values of the first direct current and the second direct current are adjusted to be consistent, so that direct current grid connection of the first internal combustion engine set and the second internal combustion engine set can be realized. When the first internal combustion engine set and the second internal combustion engine set realize direct current grid connection, only the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is required to be the target power, and the first internal combustion engine set and the second internal combustion engine set are not required to be synchronously operated all the time. Compared with the prior art, when the double internal combustion engines output the target power, the first internal combustion engine set and the second internal combustion engine set must be enabled to operate synchronously all the time, and by the method in the embodiment, the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set can be adjusted by the first internal combustion engine set and the second internal combustion engine set, so that the operation modes of the output power of the first internal combustion engine set and the output power of the second internal combustion engine set are more flexible and diversified.
Based on the foregoing embodiments, this embodiment further describes and optimizes the technical solution, specifically, step S11: after the process of judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set, the method further comprises the following steps:
if not, the first internal combustion engine set or the second internal combustion engine set is operated so that the first internal combustion engine set or the second internal combustion engine set outputs the target power.
It is understood that if the target power required to be output by the target dual internal combustion engine group is smaller than the rated output power of the individual internal combustion engine group in the target dual internal combustion engine group. In this case, the first internal combustion engine group or the second internal combustion engine group can be operated individually, so that the output of the first internal combustion engine group or the second internal combustion engine group is smaller than the rated output of the single internal combustion engine group in the target dual internal combustion engine group. Therefore, the emission of the double internal combustion engine sets can be reduced, the economic performance of the double internal combustion engine sets in the actual use process can be improved, and the control method for the output power of the double internal combustion engine sets can be applied to more actual scenes.
Based on the foregoing embodiments, this embodiment further describes and optimizes the technical solution, specifically, in step S11: after the process of judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set, the method further comprises the following steps:
if not, the first internal combustion engine set or the second internal combustion engine set is operated alternately in a preset period so that the first internal combustion engine set or the second internal combustion engine set outputs the target power.
It is conceivable that, when the target power required to be output by the target dual internal combustion engine set is smaller than the rated output power of the single internal combustion engine set, the first internal combustion engine set or the second internal combustion engine set may be operated alone, and in this embodiment, the first internal combustion engine set or the second internal combustion engine set may be alternately operated in a preset cycle, so as to reduce damage to the target dual internal combustion engine set caused by long-time operation of the single internal combustion engine set, and by the method in this embodiment, the service life of the target dual internal combustion engine set may be relatively prolonged, thereby improving the economic value of the target dual internal combustion engine set in the actual use process. Here, the preset period may be 2 hours or 3 hours, or a preset value according to actual conditions, and the duration of the preset period is not limited in this embodiment.
Based on the above embodiments, the present embodiment further describes and optimizes the above embodiments, specifically, the steps of: the process of adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power comprises the following steps:
adjusting three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set so that the first internal combustion engine set and the second internal combustion engine set output first power and second power respectively;
wherein the first power is the rated output power of the first internal combustion engine set; the second power is a difference between the target power and a rated output power of the first internal combustion engine set.
In the present embodiment, a method of adjusting the output power of a first engine set and a second engine set is provided. Specifically, after the first internal combustion engine set and the second internal combustion engine set are connected to the grid, the first internal combustion engine set can output a first power, that is, the rated output power of the first internal combustion engine set; then, the three-phase alternating current output by the second internal combustion engine set is adjusted, so that the second internal combustion engine set outputs a second power, namely, a difference value between the target power and the rated output power of the first internal combustion engine set. In this way, it is possible to cause the first internal combustion engine group and the second internal combustion engine group to jointly output a target power that is greater than the rated output power of the individual internal combustion engine groups, and thereby increase the operating mode of the target dual internal combustion engine group output power.
Compared with the prior art, when the first internal combustion engine set and the second internal combustion engine set are required to be operated at the same time all the time, the method in the embodiment can relatively reduce the emission of the target double internal combustion engine set in the operation process, and further improve the performance advantage of the target double internal combustion engine set.
Based on the foregoing embodiments, this embodiment further describes and optimizes the foregoing technical solution, specifically, in step S15: after the process of adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power, the method further comprises the following steps:
when the power required to be output by the target double internal combustion engine sets is reduced to zero from the target power, controlling the first internal combustion engine set to reduce the power and output;
and when the output power of the first internal combustion engine set is zero, controlling the second internal combustion engine set to perform power reduction output until the output power of the second internal combustion engine set is zero.
In practical application, if the power required to be output by the target dual internal combustion engine set is reduced from the target power to zero, at this time, the first internal combustion engine set may be controlled to perform power reduction output until the output power of the first internal combustion engine set is zero. And then controlling the second internal combustion engine set to perform power reduction output until the output power of the second internal combustion engine set is zero. Therefore, the first internal combustion engine set and the second internal combustion engine can be sequentially cut off to operate according to actual requirements, and therefore the operation modes of the output power of the first internal combustion engine set and the output power of the second internal combustion engine set can better meet the actual operation requirements.
In addition, in the operation process of the double internal combustion engine sets, the first internal combustion engine set and the second internal combustion engine set can be put into parallel connection in sequence according to actual requirements, and the target double internal combustion engine set can output target power larger than rated output power of the single internal combustion engine set. When the target double internal combustion engine group needs to stop running, the first internal combustion engine group and the second internal combustion engine group can be sequentially cut off from the grid connection according to the sequence of the first internal combustion engine group and the second internal combustion engine group connected to the grid connection, so that the running time of the first internal combustion engine group and the running time of the second internal combustion engine group can be relatively balanced, the damage to the internal combustion engine groups caused by overlong running time of a single internal combustion engine group is avoided, and the daily maintenance of the target double internal combustion engine groups is facilitated.
Based on the disclosure of the above embodiments, the present embodiment further describes the above disclosure through a practical specific application scenario, as shown in fig. 2, which is a locomotive circuit of a dual internal combustion engine set provided by the present embodiment. In fig. 2, 1 is a driver controller, 2 is a TCU (Traction Control Unit), 3 is a CCU (Communication Control Unit), 4 is a first internal combustion engine set, and 5 is a second internal combustion engine set; wherein the first internal combustion engine group 4 comprises: a first ECM (Engine Control Module), a first diesel Engine, a first generator, and a first controllable rectifier; the second internal combustion engine group 5 includes: a second ECM, a second diesel engine, a second generator, and a second controllable rectifier.
In the locomotive circuit, a driver controller 1 is controlled by a driver, the control level of the driver controller is 0-100%, and the power output of a first internal combustion engine set 4 and a second internal combustion engine set 5 is correspondingly controlled to be 0-Pa+PbWherein P isa+PbIs the sum of the first internal combustion engine set 4 and the second internal combustion engine set 5, i.e. Pa+PbIs the maximum output power that the traction motor can provide to the first internal combustion engine set 4 and the second internal combustion engine set 5. In the present embodiment, in order to ensure the stability of the locomotive circuit during operation, the parameters of the components of the first internal combustion engine group 4 and the second internal combustion engine group 5 are set to be completely consistent.
After the first internal combustion engine set 4 and the second internal combustion engine set 5 are started, the rotating speed of the first internal combustion engine set 4 and the rotating speed of the second internal combustion engine set 5 are controlled to operate between the idling speed and the rated rotating speed according to a control command sent by a driver controller. Specifically, the first diesel engine and the second diesel engine respectively drive the first engine and the second engine to output three-phase alternating current, and then the rotating speeds of the first engine and the second engine are controlled through the three-phase alternating current output by the first engine and the second engine.
Meanwhile, the first controllable rectifier and the second controllable rectifier convert three-phase alternating current output by the first engine and the second engine into first direct current and second direct current respectively, and when the second controllable rectifier adjusts the voltage value of the second direct current to be consistent with the voltage value of the first direct current, the first internal combustion engine set 4 and the second internal combustion engine set 5 can achieve direct current grid connection.
In actual operation, when the first ECM in the first internal combustion engine group 4 receives an output command from the driver controller 1, the first ECM controls the rotation speed of the first engine to operate between the idle speed Via and the rated rotation speed Vra, at this time, the first engine outputs the idle power Pia and the rated output power Pra, the three-phase minimum voltage Uia and the three-phase rated voltage Ura, at this time, the first controlled rectifier outputs the minimum dc voltage ULia and the rated dc voltage ULra; when the second ECM of the second internal combustion engine group 5 receives an output command from the driver controller 1, the second ECM controls the second engine to operate between the idle speed Vib and the rated speed Vrb, and at this time, the second engine outputs the idle power Pib and the rated power Prb, the three-phase minimum voltage Uib, and the three-phase rated voltage Urb, and at this time, the second controlled rectifier outputs the minimum dc voltage ULib and the rated dc voltage ULrb.
Among the above parameters, idle speed: via, nominal speed: vra — Vrb, idle power: pia ═ Pib, rated power: Pra-Prb, minimum voltage of three-phase ac: Uia-Uib, three-phase rated voltage: ura Urb, lowest dc voltage of three-phase ac: ULia ═ ULib, rated dc voltage: ULra ═ ULrb.
In the locomotive circuit provided in the present embodiment, the first internal combustion engine group 4 and the second internal combustion engine group 5 have a plurality of operation modes, and the operation modes of the first internal combustion engine group 4 and the second internal combustion engine group 5 are roughly divided into three operation modes, that is, a single-engine operation mode, a double-engine operation mode, and an automatic operation mode, according to the target power required to be output by the first internal combustion engine group 4 and the second internal combustion engine group 5. In addition, in the present embodiment, in order to facilitate the operation of the driver, three corresponding control modes, that is, a single-machine operation mode, a dual-machine operation mode, and an automatic operation mode, are set in the locomotive control unit 3, as shown in fig. 3.
When the single-engine running mode is selected by the double internal combustion engine sets, firstly, the driver selects the single-engine running mode on the CCU, and then selects the starting mode, at the moment, the first diesel engine in the first internal combustion engine set 4 enters an idling running state, when the driver controller 1 gradually moves from a zero position to a 50% level position, the output power of the first diesel engine can reach the rated power and the rated rotating speed, the first generator can output three-phase rated voltage, and the first controllable rectifier can output rated direct current voltage.
In the process, when the driver controller 1 moves from the 50% level to the full level again by 100%, the output parameters of the dual internal combustion engine set are unchanged, as shown in fig. 4, the ordinate represents the output power of the first diesel engine set (or the output voltage of the first generator or the rectified dc voltage), and the abscissa represents the rotation speed of the first diesel engine. Specifically, after the first diesel engine is started, the first diesel engine enters an idle state and outputs a corresponding output rotation speed Via and an output power Pia, at this time, the first generator outputs a voltage Uia, and the first controllable rectifier outputs a dc voltage ULia.
As shown in fig. 4, a schematic diagram of the first engine group of the dual engine group is put into operation. As can be seen from fig. 4, when the driver controller 1 moves from the zero position to the 50% level step by step, the first diesel engine outputs the rated power Pra and the rated rotational speed Vra, the first generator outputs the three-phase rated voltage Ura, the first controllable rectifier outputs the rated dc voltage ULra, and when the driver controller 1 moves from the 50% level to the full level again by 100%, the output parameters of the dual internal combustion engine set do not change.
Therefore, when the double internal combustion engine sets are in a single-machine operation mode, the 0-50% level range of the driver controller is effective; the power output by the first internal combustion engine set and the second internal combustion engine set 5 is not higher than the output power of one diesel generator set. It is conceivable that, when the dual internal combustion engine groups are in the single-engine operation mode, not only consumption of energy resources can be avoided, but also the exhaust emission of the dual internal combustion engine groups can be reduced. In addition, when the first internal combustion engine set 4 is in the running mode and the second internal combustion engine set 5 is in the cold standby state, the reliability of the double internal combustion engine sets in the running process can be further improved.
It should be noted that, in this embodiment, a single-machine operation of the first internal combustion engine set 4 is described as an example, and a single-machine operation mode of the second internal combustion engine set 5 is consistent with an operation mode of the first internal combustion engine set 4, which is not described herein again. In practical applications, in order to ensure that the operating times of the first internal combustion engine set 4 and the second internal combustion engine set 5 are the same, the first internal combustion engine set 4 and the second internal combustion engine set 5 may be controlled to alternately operate at a certain period, that is, the second internal combustion engine set 5 is in a cold standby state during the operation of the first internal combustion engine set 4.
When the dual internal combustion engine set selects the dual engine operation mode, the first diesel engine and the second diesel engine in the first internal combustion engine set 4 and the second internal combustion engine set can simultaneously enter the idle operation state. At this time, the first internal combustion engine group 4 and the second internal combustion engine group 5 simultaneously supply the traction power to the traction motor, that is, the first diesel engine and the second diesel engine can jointly output idle power Pi (Pi ═ Pia + Pib) and idle power Vi (Vi ═ Via ═ Pib). When the driver controller 1 moves from the zero position to the full-range position by 100%, the first internal combustion engine group 4 and the second internal combustion engine group 5 output rated power Pr (Pr + Pra + Prb) and rated rotation speed Vr (Vr ═ Vra ═ Vrb), the first generator and the second generator simultaneously output three-phase rated voltage Ur (Ur ═ Ura ═ Urb), and the first controllable rectifier and the second controllable rectifier output rated dc voltage ULr (ULra ═ ULrb).
Fig. 5 is a schematic diagram of the first internal combustion engine group 4 and the second internal combustion engine group 5 being put into operation together. Fig. 5 shows that the operating mode of the dual internal combustion engine group is characterized by: the first internal combustion engine set 4 and the second internal combustion engine set 5 are started and run in a grid-connected mode, the output power is doubled compared with that of a single internal combustion engine set, and the driver controller 1 is effective from a 0-100% level. The operating conditions are suitable for dual-engine traction power operation, i.e., the conditions that line operation and traction output power can exceed the output power of a single internal combustion engine set.
When the double internal combustion engines select the automatic motion mode, the first diesel engine and the second diesel engine in the first internal combustion engine set 4 and the second internal combustion engine set 5 are both started, the driver controller gradually moves to a 50% level from a zero position, the first diesel engine set operates at an increased speed, the output power correspondingly reaches the rated power, the second controllable rectifier is closed, the second internal combustion engine set 5 does not output power, when the level of the driver controller exceeds 50%, various output parameters output by the first internal combustion engine set 4 are kept unchanged, the second internal combustion engine set 5 is put into operation, when the level of the driver controller reaches a full level, the output power of the second internal combustion engine set 5 also reaches the rated power, namely, the first internal combustion engine set 4 and the second internal combustion engine set 5 both operate in a rated power state.
It should be noted that, when the second internal combustion engine set 5 is put into operation, in the process of raising the three-phase alternating current output by the second diesel engine from the three-phase minimum voltage to the three-phase rated voltage, the direct-current voltage output by the second controllable rectifier needs to be regulated by the second controllable rectifier to be always the same as the voltage value of the three-phase alternating current output by the first internal combustion engine set 4, that is, to be always at the rated direct-current voltage.
Fig. 6 is a schematic diagram of the first internal combustion engine set in the automatic operation mode according to the present embodiment. As can be seen from fig. 6, before the driver controller does not exceed the 50% level, the second internal combustion engine set 5 is always in the idle running state (hot standby state), the second controllable rectifier is always in the output off state, and the second internal combustion engine set 5 does not output power.
Fig. 7 is a schematic diagram of the second internal combustion engine set in the automatic operation mode according to the present embodiment. As can be seen from fig. 7, when the driver controller exceeds the 50% level, the driver controller sends a control command to the first ECM through the CCU, and parameters such as the output power of the first internal combustion engine set 4 do not change any more; when the level of the driver controller is shifted from 50% to 100%, the second controlled rectifier always keeps the output direct-current voltage consistent with the direct-current voltage ULra output by the first controlled rectifier, the rotating speed of the second internal combustion engine group 5 reaches Vrb from Vib, and the output power reaches Prb from Pib.
It should be noted that, in order to ensure that the first internal combustion engine set 4 and the second internal combustion engine set 5 operate for substantially the same time, the first internal combustion engine set 4 and the second internal combustion engine set 5 may be controlled to alternately operate according to a certain period. In addition, when the level of the driver control device is reduced from 100% to 0, the second internal combustion engine set 5 may be controlled to be unloaded first, when the level of the driver control device is lower than 50%, the second internal combustion engine set 5 no longer outputs power, and then the first internal combustion engine set 4 starts to be unloaded until the idling state.
As can be seen from the above analysis, in the automatic operation mode, as the output power required by the traction motor increases gradually, the first internal combustion engine set 4 that is put in first enters the full power operation mode and is maintained, and then the second internal combustion engine set 5 that is in the hot standby state is put in operation, and the output power of the second internal combustion engine set 5 increases as the output power required by the traction motor increases until the second internal combustion engine set 5 outputs full power; when the traction power required to be output by the traction motor is gradually reduced, the output power of the second internal combustion engine set 5 which is put into operation later can be correspondingly reduced until the output power of the second internal combustion engine set 5 is zero. It can be seen that, with the method in the present embodiment, not only can the first internal combustion engine set 4 and the second internal combustion engine set 5 be sequentially put into operation or sequentially cut off from operation according to the actual power demand of the traction motor, but also the purpose of flexibly adjusting the output power of the first internal combustion engine set 4 and the second internal combustion engine set 5 can be achieved.
Obviously, by the method in this embodiment, the first internal combustion engine set and the second internal combustion engine set can flexibly adjust the operation modes of the output powers of the first internal combustion engine set and the second internal combustion engine set according to the specific needs of actual conditions, so that the operation modes of the output powers of the target dual internal combustion engine sets can be more flexible and diverse, and the performance advantages of the target dual internal combustion engine sets can be fully exerted.
Correspondingly, the embodiment of the present invention further discloses a control device for output power of a dual internal combustion engine set, as shown in fig. 8, including:
the power judgment module 21 is used for judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
the unit operation module 22 is used for operating a first internal combustion unit and a second internal combustion unit in the target double internal combustion unit if the unit operation module is used for operating the target double internal combustion unit;
the current conversion module 23 is configured to convert three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set into a first direct current and a second direct current by using the first controllable rectifier and the second controllable rectifier, respectively; the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
the current adjusting module 24 is configured to adjust voltage values of the first direct current and the second direct current to be consistent, so as to implement direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
and the power output module 25 is configured to, when the first internal combustion engine set and the second internal combustion engine set realize direct-current grid connection, adjust three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set so that a sum of output powers output by the first internal combustion engine set and the second internal combustion engine set is a target power.
Preferably, the control device further includes:
and the alternate operation module is used for alternately operating the first internal combustion engine set or the second internal combustion engine set according to a preset period to enable the first internal combustion engine set or the second internal combustion engine set to output the target power if the target power required to be output by the target double internal combustion engine set is smaller than the rated output power of a single internal combustion engine set in the target double internal combustion engine set.
Preferably, the control device further includes:
the first power reducing module is used for adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that after the process that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power, when the power required to be output by the target double internal combustion engine sets is reduced to zero from the target power, the first internal combustion engine set is controlled to reduce the power and output;
and the second power reducing module is used for controlling the second internal combustion engine set to reduce power output when the output power of the first internal combustion engine set is zero until the output power of the second internal combustion engine set is zero.
Correspondingly, the embodiment of the invention also discloses a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the control method for output power of a dual internal combustion engine set as disclosed in the foregoing.
Correspondingly, the embodiment of the present invention further discloses a control device for output power of a dual internal combustion engine set, as shown in fig. 9, including:
a memory 31 for storing a computer program;
a processor 32 for implementing the steps of the method for controlling the output power of a dual combustion engine group as disclosed in the foregoing when executing said computer program.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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 method, the device, the medium and the equipment for controlling the output power of the dual internal combustion engine set provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for controlling output power of a dual internal combustion engine set is characterized by comprising the following steps:
judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
if yes, operating a first internal combustion engine set and a second internal combustion engine set in the target double internal combustion engine sets;
converting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set into first direct current and second direct current by using a first controllable rectifier and a second controllable rectifier respectively; wherein the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
adjusting the voltage values of the first direct current and the second direct current to be consistent so as to realize direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
when the direct current grid connection is realized by the first internal combustion engine set and the second internal combustion engine set, three-phase alternating currents output by the first internal combustion engine set and the second internal combustion engine set are adjusted, so that the sum of output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power.
2. The control method according to claim 1, characterized in that, after the process of determining whether the target power required to be output by the target dual internal combustion engine group is larger than the rated output power of the individual internal combustion engine group in the target dual internal combustion engine group, the method further comprises:
if not, operating the first internal combustion engine set or the second internal combustion engine set so as to enable the first internal combustion engine set or the second internal combustion engine set to output the target power.
3. The control method according to claim 1, characterized in that, after the process of determining whether the target power required to be output by the target dual internal combustion engine group is larger than the rated output power of the individual internal combustion engine group in the target dual internal combustion engine group, the method further comprises:
if not, alternately operating the first internal combustion engine set or the second internal combustion engine set in a preset period to enable the first internal combustion engine set or the second internal combustion engine set to output the target power.
4. The control method according to claim 1, wherein the process of adjusting the three-phase alternating currents output by the first internal combustion engine group and the second internal combustion engine group so that the sum of the output powers output by the first internal combustion engine group and the second internal combustion engine group becomes the target power includes:
adjusting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the first internal combustion engine set and the second internal combustion engine set output first power and second power respectively; wherein the first power is a rated output power of the first internal combustion engine set; the second power is a difference between the target power and a rated output power of the first internal combustion engine group.
5. The method according to any one of claims 1 to 4, wherein the process of adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output powers output by the first internal combustion engine set and the second internal combustion engine set is the target power further comprises:
when the power required to be output by the target double internal combustion engine sets is reduced to zero from the target power, controlling the first internal combustion engine set to reduce the power output;
and when the output power of the first internal combustion engine set is zero, controlling the second internal combustion engine set to carry out power reduction output until the output power of the second internal combustion engine set is zero.
6. A control apparatus for output power of a twin internal combustion engine set, comprising:
the power judgment module is used for judging whether the target power required to be output by the target double internal combustion engine set is larger than the rated output power of a single internal combustion engine set in the target double internal combustion engine set;
the unit operation module is used for operating a first internal combustion unit and a second internal combustion unit in the target double internal combustion unit if the unit operation module is used for operating the target double internal combustion unit;
the current conversion module is used for converting three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set into first direct current and second direct current by utilizing a first controllable rectifier and a second controllable rectifier respectively; wherein the first controllable rectifier and the second controllable rectifier are rectifiers which are respectively connected to the first internal combustion engine set and the second internal combustion engine set in advance;
the current adjusting module is used for adjusting the voltage values of the first direct current and the second direct current to be consistent so as to realize direct current grid connection of the first internal combustion engine set and the second internal combustion engine set;
and the power output module is used for adjusting the three-phase alternating current output by the first internal combustion engine set and the three-phase alternating current output by the second internal combustion engine set when the direct current grid connection is realized by the first internal combustion engine set and the second internal combustion engine set, so that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power.
7. The apparatus of claim 6, further comprising:
the alternate operation module is used for alternately operating the first internal combustion engine set or the second internal combustion engine set according to a preset period to enable the first internal combustion engine set or the second internal combustion engine set to output the target power if the target power required to be output by the target double internal combustion engine set is smaller than the rated output power of a single internal combustion engine set in the target double internal combustion engine set.
8. The apparatus of claim 6, further comprising:
the first power reducing module is used for adjusting the three-phase alternating current output by the first internal combustion engine set and the second internal combustion engine set so that the sum of the output power output by the first internal combustion engine set and the output power output by the second internal combustion engine set is the target power, and when the power required to be output by the target double internal combustion engine set is reduced to zero from the target power, the first internal combustion engine set is controlled to reduce the power output;
and the second power reducing module is used for controlling the second internal combustion engine set to reduce power output when the output power of the first internal combustion engine set is zero until the output power of the second internal combustion engine set is zero.
9. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the method for controlling the output power of a dual internal combustion engine group according to any one of claims 1 to 5.
10. A control apparatus of output power of a twin internal combustion engine group, characterized by comprising:
a memory for storing a computer program;
processor for implementing the steps of a method for controlling the output power of a dual combustion engine group according to any one of claims 1 to 5 when executing said computer program.
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| CN201910016353.3A CN109488468B (en) | 2019-01-08 | 2019-01-08 | Control method, device, medium and equipment for output power of double internal combustion engine sets |
| PCT/CN2019/096299 WO2020143206A1 (en) | 2019-01-08 | 2019-07-17 | Locomotive circuit of dual internal combustion engine group and control method and device thereof, medium and equipment |
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| CN102269065B (en) * | 2011-06-30 | 2013-10-16 | 中国船舶重工集团公司第七一一研究所 | Connection/disconnection operation control system of multiple diesel engines and control methods thereof |
| EP2998150B1 (en) * | 2013-07-01 | 2019-08-21 | Mitsubishi Electric Corporation | Hybrid drive system |
| CN103925075A (en) * | 2014-05-06 | 2014-07-16 | 韩鑫岗 | Multi-cycle internal combustion engine |
| US20160194009A1 (en) * | 2016-03-15 | 2016-07-07 | Electro-Motive Diesel, Inc. | Integrated traction system for locomotives |
| CN107147103A (en) * | 2017-07-13 | 2017-09-08 | 中车永济电机有限公司 | Electrical Propulsion Ship direct current networking power system |
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