CN115817542B - Hybrid power supply control method suitable for low-speed shunting locomotives - Google Patents
Hybrid power supply control method suitable for low-speed shunting locomotives Download PDFInfo
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- CN115817542B CN115817542B CN202211443499.4A CN202211443499A CN115817542B CN 115817542 B CN115817542 B CN 115817542B CN 202211443499 A CN202211443499 A CN 202211443499A CN 115817542 B CN115817542 B CN 115817542B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of shunting control, in particular to a hybrid power supply control method suitable for a low-speed shunting locomotive, which comprises the following steps of setting a preset level I and a preset level II of a power battery; when the handle level is larger than the first preset level and smaller than or equal to the second preset level, the maximum discharge power and the maximum discharge time of the bidirectional DC-DC are calculated according to the current locomotive temperature to determine whether to start the diesel engine, and when the handle level is larger than the second preset level, the diesel engine and the power battery are started to supply power in a mixed mode. The mixed power supply control method suitable for the low-speed locomotive provided by the invention can avoid starting the diesel engine when the preset level is greater than the preset level in the prior art if the locomotive operation condition can be met at the second preset level, thereby reducing the starting times of the diesel engine and ensuring the service life of the diesel engine.
Description
Technical Field
The invention relates to the technical field of shunting control, in particular to a hybrid power supply control method suitable for a low-speed shunting locomotive.
Background
The shunting locomotive is the basic power for shunting various locomotives, industrial and mining vehicles, trucks and the like. Because the traction or pushing car group needs to be started in a short distance, a higher construction speed is not needed, but a certain traction force is needed, and the car group is characterized in that the car group needs to be frequently moved forward or backward and is frequently started and stopped. The power battery and the diesel engine grid-connected control are adopted on the vehicle to jointly supply power for the whole vehicle.
The existing power battery and diesel engine grid connection control mainly comprises two methods:
The first is that when the running position signal is 1, the diesel engine is started according to the handle level of the driver controller, when the handle level is low, the locomotive is only powered by the power battery, when the handle level is high, the diesel engine is automatically started, and is connected with the power battery to supply energy for the locomotive, when the running position signal is 0 and the handle level signal is more than or equal to 1, the running condition of the locomotive is traction of the storage battery, and the diesel engine is started and stopped according to the size of the SOC value. When the battery SOC value is sufficient, the locomotive can not start the diesel engine, and the maximum output power of the locomotive is only the output power of the power battery, so that the power of the whole locomotive is limited, and the requirement of high-power traction of the locomotive can not be met.
The second method is to collect the handle level, the battery SOC value and the current locomotive speed information when the locomotive runs, when the SOC value of the power battery is larger than the preset SOC value and the handle level is smaller than the preset level, the diesel engine is not started, when the SOC value of the power battery is larger than the preset SOC value and the handle level is larger than the preset level, whether the diesel engine is started or not is determined according to the current locomotive speed, and when the diesel engine charges the power battery, the charging amount of the diesel engine for charging the power battery is determined according to the current locomotive speed. Because the constant torque part of the shunting locomotive is smaller, the constant power interval is more, the acceleration time is quick, and the acquisition of the speed of the vehicle for judging conditions is not necessary.
In addition, in the two methods, the starting times of the diesel engine are more, and the service life of the diesel engine is influenced.
Disclosure of Invention
The invention provides a hybrid power supply control method suitable for a low-speed shunting locomotive, which aims to overcome the technical defects of limited power of the whole locomotive, poor necessity of power supply judgment and frequent diesel engine starting existing in the conventional power battery and diesel engine grid connection control method of the shunting locomotive.
The invention provides a hybrid power supply control method suitable for a low-speed locomotive, which comprises the following steps:
Selecting a power battery with charge and discharge in a bidirectional DC-DC mode, and setting a preset level I and a preset level II of the power battery, wherein the preset level I is the maximum level which can be met by the power battery through bidirectional DC-DC long-time discharge, and the preset level II is the maximum level which can be met by the power battery through bidirectional DC-DC short-time discharge;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is smaller than or equal to the preset level, the diesel engine is not started, and the power battery supplies power;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is larger than the preset level one and smaller than or equal to the preset level two, calculating the maximum discharge power and the maximum discharge time of the bidirectional DC-DC according to the current locomotive temperature, if the maximum discharge power and the maximum discharge time can meet the working condition, not starting the diesel engine, and if the maximum discharge power and the maximum discharge time can not meet the working condition, starting the diesel engine, and mixing the diesel engine and the power battery for power supply;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is larger than a second preset level, starting a diesel engine, and mixing the diesel engine and the power battery for power supply;
And when the SOC value of the power battery is smaller than a preset SOC value, the power battery is charged.
Optionally, the power battery is a lithium battery.
Optionally, the second preset level is the maximum level that the power battery can meet through bidirectional DC-DC discharge for 5min to 30 min.
Alternatively, when the diesel engine and the power battery are in hybrid power supply, if the level of the handle is reduced, the power battery stops discharging, and the diesel engine is used for supplying power independently.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
According to the hybrid power supply control method, the power battery is provided with the first preset level and the second preset level, the first preset level is the maximum level which can be met by long-time discharge, the second preset level is the maximum level which can be met by short-time discharge, the power provided by the second preset level is larger than that of the first preset level, and the starting and stopping of the shunting locomotive are frequent, so that if the working condition of the locomotive can be met at the second preset level, the diesel engine can be prevented from being started when the power is larger than the first preset level in the prior art, the starting times of the diesel engine are reduced, and the service life of the diesel engine is ensured. In addition, when the power required by the locomotive is high, the control method can start the diesel engine to supply power in a mixed mode so as to ensure the power requirement of the whole locomotive, the control method is based on the temperature of the locomotive when judging the power supply mode, the power supply judgment necessity is strong, and the control method adopts the mixed power to supply power, so that the exhaust emission and the noise pollution can be reduced, and the purposes of energy conservation and emission reduction are achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a block diagram of a hybrid power supply control method for a low speed locomotive according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein, and it is apparent that the embodiments in the specification are only some, rather than all, of the embodiments of the present invention.
In one embodiment, as shown in FIG. 1, the hybrid power supply control method suitable for a low-speed vehicle locomotive comprises the steps of selecting a power battery with charge and discharge being in a bidirectional DC-DC mode, setting a preset level I and a preset level II of the power battery, wherein the preset level I is a maximum level which can be met by the power battery through long-term discharge of bidirectional DC-DC, the preset level II is a maximum level which can be met by the power battery through short-term discharge of bidirectional DC-DC, when the SOC value of the power battery is larger than a preset SOC value and is smaller than or equal to the preset level I, the diesel engine is not started, when the SOC value of the power battery is larger than the preset SOC value and is smaller than or equal to the preset level II, calculating the maximum discharge power and the maximum discharge time of the bidirectional DC-DC according to the current locomotive temperature, and if the maximum discharge power and the maximum discharge time can meet the operation working condition, and if the maximum discharge power and the maximum discharge time can not meet the operation condition, starting the diesel engine, and when the SOC value of the power battery is larger than the preset SOC value and the power battery is smaller than the preset SOC value, and when the SOC value of the power battery is larger than the preset SOC value and is smaller than the preset level II, the power battery is started.
The present embodiment is limited to a system using a bidirectional DCDC method in which a power battery is charged and discharged to an intermediate dc bus through bidirectional DCDC, and is common to a dc bus rectified by a diesel engine-main generator. When the power battery is charged, the diesel engine-main generator can be rectified and then supplied to the middle direct current bus, and the power battery is charged after bidirectional DCDC conversion.
Specifically, the second preset level is the maximum level that can be met by the power battery through bidirectional DC-DC discharge for 5min to 30min, and the mode is also called as a high-power mode according to different working conditions and the capability of the DC-DC unit.
Specifically, the power battery is a lithium battery. Of course, as an alternative embodiment, the power battery may also use a super capacitor or other power battery charged and discharged into a DC-DC mode.
Specifically, the power battery can be charged by the diesel engine-main generator and supplied to the middle direct current bus after rectification and is charged by the bidirectional DC-DC conversion, or can be charged by the middle direct current bus through in-warehouse charging sockets or other mixed energy sources and the like, and is charged by the bidirectional DC-DC conversion.
According to the hybrid power supply control method, the power battery is provided with the first preset level and the second preset level, the first preset level is the maximum level which can be met by long-time discharge, the second preset level is the maximum level which can be met by short-time discharge, the power provided by the second preset level is larger than that of the first preset level, and if the operation working condition of the locomotive can be met at the second preset level, the diesel engine can be prevented from being started when the power is larger than the first preset level in the prior art, so that the starting times of the diesel engine are reduced, and the service life of the diesel engine is ensured. In addition, when the power required by the locomotive is larger, the control method can start the diesel engine to supply power in a mixed mode, so that the power requirement of the whole locomotive is ensured, and the control method is based on the temperature of the locomotive when judging the power supply mode, so that the necessity of judging the power supply is strong.
In some embodiments, when the diesel engine and the power battery are mixed for power supply, if the level of the handle is reduced, the power battery stops discharging, and the diesel engine is used for power supply alone. Therefore, compared with the scheme of stopping the diesel engine to start the power battery when the handle level is reduced, the starting and stopping times of the diesel engine are further reduced, and the service life of the diesel engine is ensured.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The hybrid power supply control method suitable for the low-speed locomotive is characterized by comprising the following steps of:
Selecting a power battery with charge and discharge in a bidirectional DC-DC mode, and setting a preset level I and a preset level II of the power battery, wherein the preset level I is the maximum level which can be met by the power battery through bidirectional DC-DC long-time discharge, and the preset level II is the maximum level which can be met by the power battery through bidirectional DC-DC short-time discharge;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is smaller than or equal to the preset level, the diesel engine is not started, and the power battery supplies power;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is larger than the preset level one and smaller than or equal to the preset level two, calculating the maximum discharge power and the maximum discharge time of the bidirectional DC-DC according to the current locomotive temperature, if the maximum discharge power and the maximum discharge time can meet the working condition, not starting the diesel engine, and if the maximum discharge power and the maximum discharge time can not meet the working condition, starting the diesel engine, and mixing the diesel engine and the power battery for power supply;
When the SOC value of the power battery is larger than a preset SOC value and the handle level is larger than a second preset level, starting a diesel engine, and mixing the diesel engine and the power battery for power supply;
And when the SOC value of the power battery is smaller than a preset SOC value, the power battery is charged.
2. The hybrid power supply control method for a low-speed locomotive of claim 1, wherein the power battery is a lithium battery.
3. The hybrid power supply control method for a low-speed locomotive according to claim 1, wherein the second preset level is a maximum level that the power battery can meet through bidirectional DC-DC discharge for 5min to 30 min.
4. The hybrid power supply control method for a low speed vehicle according to claim 1, wherein when the diesel engine and the power battery are hybrid-powered, if the level of the handle is lowered, the power battery stops discharging, and the diesel engine alone supplies power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211443499.4A CN115817542B (en) | 2022-11-18 | 2022-11-18 | Hybrid power supply control method suitable for low-speed shunting locomotives |
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| CN202211443499.4A CN115817542B (en) | 2022-11-18 | 2022-11-18 | Hybrid power supply control method suitable for low-speed shunting locomotives |
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| CN115817542A CN115817542A (en) | 2023-03-21 |
| CN115817542B true CN115817542B (en) | 2025-06-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303613A (en) * | 2011-06-21 | 2012-01-04 | 株洲南车时代电气股份有限公司 | Diesel engine and storage battery pack-based dual-power locomotive control method and device |
| CN110667606A (en) * | 2019-10-16 | 2020-01-10 | 中车大连机车车辆有限公司 | Control method of alternating-current transmission hybrid power shunting locomotive |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6615118B2 (en) * | 2001-03-27 | 2003-09-02 | General Electric Company | Hybrid energy power management system and method |
| US8212532B2 (en) * | 2008-07-24 | 2012-07-03 | General Electric Company | Method and system for control of a vehicle energy storage device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303613A (en) * | 2011-06-21 | 2012-01-04 | 株洲南车时代电气股份有限公司 | Diesel engine and storage battery pack-based dual-power locomotive control method and device |
| CN110667606A (en) * | 2019-10-16 | 2020-01-10 | 中车大连机车车辆有限公司 | Control method of alternating-current transmission hybrid power shunting locomotive |
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Inventor after: Zhang Tao Inventor after: Wang Xile Inventor after: Wang Quance Inventor after: Chang Xiuli Inventor after: Wang Lei Inventor before: Wang Quance Inventor before: Chang Xiuli Inventor before: Zhang Tao Inventor before: Wang Xile Inventor before: Wang Lei |
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