CN210669631U - Hybrid power system and crane using same - Google Patents
Hybrid power system and crane using same Download PDFInfo
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- CN210669631U CN210669631U CN201921358972.2U CN201921358972U CN210669631U CN 210669631 U CN210669631 U CN 210669631U CN 201921358972 U CN201921358972 U CN 201921358972U CN 210669631 U CN210669631 U CN 210669631U
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Abstract
The embodiment of the utility model discloses a hybrid power system and use hybrid power system's hoist, this system includes group battery, generating set, battery management module, AFE control module and controller, and battery management module sets up between group battery and controller for the real-time supervision to the group battery; the AFE control module is arranged at the output end of the generator set and used for detecting the running state of the generator set and rectifying the current output by the generator set; the controller is connected with the generator set and the AFE control module; the battery pack is used for providing power energy for the system, the generator set is used for charging the battery pack and providing power energy for the system, and the output current of the battery pack and the rectified output current of the generator set passing through the AFE control module are connected to the same direct current bus in parallel. Additionally, the embodiment of the utility model provides an use hoist hybrid power system's hoist is still disclosed. Adopt the utility model discloses, can realize generating set's constant power output.
Description
Technical Field
The utility model relates to a hybrid technical field especially relates to a hybrid system and application hybrid system's hoist.
Background
The hybrid power system is a power system formed by combining two or more single drive systems capable of operating simultaneously, for example, in a port container terminal, for a hybrid power system in a crane such as an RTG (rubber tyre gantry crane) used for container yard operation, the RTG realizes power supply through the hybrid power system formed by a diesel generator set and a battery pack, and further realizes yard operation of the RTG; the power energy of the RTG is provided by connecting a battery pack in parallel on a direct current bus of the RTG system and connecting a diesel generator set in parallel on the direct current bus after passing through a charger; however, in the use process of the hybrid power system, if the SOC (State of Charge) value of the battery pack is lower than the lowest value of the preset working range, the diesel generator set is started, wherein when the diesel generator set is just started, the output power of the diesel generator set is mainly used for charging the battery pack, and the power demand of the battery pack is large, but because the output power of the diesel generator set is small at this time, when the load of the crane is suddenly increased, the diesel generator set cannot provide enough power to the load at one moment, and the load needs to be loaded for a certain time to reach the power required by the load; similarly, when the SOC of the battery pack is close to the highest value of the set working range, the diesel engine set is in a low-power running state, the output power of the diesel engine set is mainly used for the crane, if the crane executing mechanism executes high power requirements such as box hanging operation, short-time high power is needed, and therefore the diesel engine set in the low-power running state needs to be loaded for a certain time to reach the power required by the box hanging.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hybrid power system and application hybrid power system's hoist for solve generating set among the prior art when the group battery charges and regard as emergency power source, generating set work is unstable, have the flame-out condition and lead to hoist drive power not enough unable normal work and the lower problem of fuel rate. The utility model discloses a concrete technical scheme as follows:
a hybrid powertrain system comprising: group battery, generating set, battery management module, AFE control module and controller, wherein:
the battery management module is arranged between the battery pack and the controller and used for monitoring the battery pack in real time and transmitting the result of the real-time monitoring to the controller;
the AFE control module is arranged at the output end of the generator set and used for detecting the running state of the generator set and rectifying the current output by the generator set; the controller is connected with the generator set and the AFE control module;
the battery pack is used for providing power energy for the system, the generator set is used for charging the battery pack and providing power energy for the system, and the output current of the battery pack and the rectified output current of the generator set passing through the AFE control module are connected to the same direct current bus in parallel.
Optionally, the system further includes a dc control module, the dc control module is disposed at an output end of the battery pack, the dc control module is configured to control an output power of the battery pack, and an output current of the battery pack passes through the dc control module and then is connected in parallel to the dc bus.
Optionally, the AFE control module includes a detection module and a rectification module, and the detection module is connected to the generator set and the controller and is configured to detect an operating voltage and an operating frequency of the generator set;
the rectifying module is connected with the generator set and the battery pack and used for rectifying the current output by the generator set.
Optionally, the detection module comprises a voltage sensor and a rotation speed sensor, wherein the voltage sensor is used for detecting the operating voltage of the generator set; the rotating speed sensor is used for detecting the operating frequency of the generator set.
Optionally, the battery management module includes an SOC monitoring unit, and the SOC monitoring unit is configured to detect an SOC value of the battery pack in real time.
Optionally, the hybrid system further includes an HMI (Human Machine Interface), and the controller is communicatively connected to the HMI.
Optionally, the controller is a PLC control system.
Optionally, the system is further provided with a DC/AC converter connected in parallel with the DC bus.
Optionally, the battery pack is a powered lithium battery pack.
A crane comprising a hybrid system as claimed in any one of the preceding claims.
Implement the embodiment of the utility model provides a, will have following beneficial effect:
after the hybrid power system and the crane using the hybrid power system are adopted, the AFE control module is arranged between the generator set and the battery pack and used for detecting the running state of the generator set and rectifying the current output by the generator set, the battery pack is used for providing power energy of a load in the system, the generator set is used for charging the battery pack and/or is used as an emergency power supply of the load, the battery management module is arranged between the controller and the battery pack and used for monitoring the battery pack in real time, and meanwhile, the controller is connected with the generator set; when the battery management module detects that the electric quantity of the battery pack is too low, the AFE control module is started to detect the running state of the generator set, an instruction is sent out through the controller to control the starting of the generator set, and after the generator set runs stably, the stable power charging operation of the battery pack is realized through rectification of the AFE control module; after the generator set is subjected to rectification control through the AFE control module, constant power output of the generator set is guaranteed, stable operation and optimal fuel efficiency are achieved, and therefore the phenomenon that the generator set is flameout is avoided, the service life of the generator set is prolonged, and maintenance cost is reduced.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is a schematic illustration of a hybrid powertrain as described in one embodiment;
fig. 2 is a schematic diagram illustrating the structural and functional implementation of the AFE control module in one embodiment;
fig. 3 is a schematic diagram illustrating the structure and function of the battery management module according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to solve the problem that the output current of a hybrid power system is unstable and the jumping range is large when the hybrid power system is used for charging a battery pack through a generator set, such as a diesel engine set, and the like and is used as a system power source, so that the battery pack fails and potential safety hazards are caused, in the embodiment, the hybrid power system is specially provided, and the system adopts an AFE (automatic inductance optimization) controllable bidirectional rectification principle to carry out rectification control on the current output by the generator set so as to ensure that the generator outputs the current with stable power.
The generating set in this embodiment can be a diesel engine generating set and the like, and the battery pack is a power lithium battery pack.
As shown in fig. 1, fig. 1 shows a structure of a hybrid system in the present embodiment.
Specifically, hybrid system 100 includes genset 110, AFE control module 120, battery pack 130, battery management module 140, controller 150, DC/AC converter 160, and DC control module 170.
Wherein, the system provides power energy through the battery pack 130; specifically, generally, the SOC of the battery pack 130 is set in a fixed working range, and when the SOC of the battery pack 130 is in a set range, the battery pack 130 provides power energy to the entire hybrid power system, specifically, the output end of the battery pack 130 is provided with the dc control module 170, and the output current of the battery pack 130 passes through the dc control module 170 and then is connected to the dc bus 200 in parallel, so as to supply power to the first load 180 and the second load 190; if the hybrid power system is applied to a crane in this embodiment, the first load 180 is an auxiliary electric device such as a signal device, an ignition system, and an instrument device, and the second load 190 is an actuator of the crane. If the SOC of the battery pack 130 is lower than the set minimum value, at this time, the generator set 110 performs charging operation on the battery pack 130 after being rectified by the AFE control module 120, and during the charging process, the generator set 110 and the battery pack 130 provide power energy for the first load 180 and the second load 190 together; when the charging of the battery pack 130 is completed, the generator set 110 is turned off, and the battery pack 130 alone provides power energy for the whole system.
Further, in order to supply power to the first load 180 through the AFE control module 120 by the genset 110 and/or the battery pack 130, the DC/AC converter 160 is disposed between the genset 110, the battery pack 130 and the first load 180, specifically, the current output by the genset 110 and/or the battery pack 130 is converted into a suitable current type by the DC/AC converter 160, for example, the direct current is converted into the alternating current and then output to supply power to the first load 180, so as to meet the power consumption requirements of different devices.
In a specific embodiment, the battery management module 140 is disposed between the battery pack 130 and the controller 150, and the controller 150 is connected to the generator set 110, wherein the battery management module 140 is configured to monitor the battery pack 130 in real time, for example, in conjunction with fig. 3, if the SOC monitoring unit 141 is disposed in the battery management module 140, the SOC monitoring unit 141 may implement SOC detection operation on the battery pack 130 in real time or according to a preset time period, wherein obtaining a specific value of the SOC of the battery pack 130 may be implemented by, for example, an ampere-hour metering method; that is, in the present embodiment, a normal SOC range value of the battery pack 130 is set in the controller 150, after the battery management module 140 detects the battery pack 130, parameters (voltage, current, temperature, SOC, etc.) corresponding to the detection are transmitted to the controller 150, the controller 150 analyzes and compares the SOC value monitored and obtained by the battery management module 140 with the SOC value of the set range, if the monitored and obtained SOC value after the comparison is lower than the lowest SOC value, it can be determined that the battery pack 130 needs to perform a charging operation, and at this time, the controller 150 issues a control command to control the generator set 110 to start charging the battery pack 130.
Further, when the voltage, the current, the temperature, and the like of the battery pack 130 can be detected by the battery management system 140, the detection can be specifically realized by, for example, an existing voltage sensor, an existing current sensor, an existing temperature sensor, and the like.
In the process of charging the battery pack 130 through the generator set 110, in order to avoid the problems of uncertain charging current and large jump range in the conventional hybrid power system, in the embodiment, the AFE control module 120 is arranged at the output end of the generator set 110, and the current output by the generator set 110 is controllably rectified through the AFE control module 120 to keep constant power output; meanwhile, the AFE control module 120 is also connected to the controller 150; preferably, the AFE control module 120 and the controller 150 are connected through a Porfibus bus, for example, to realize a communication connection therebetween.
Preferably, the rectifying module 121 in this embodiment implements a rectifying operation by an IGBT cell.
Specifically, when the SOC value of the battery pack 140 is lower than the set minimum SOC value, the controller 150 controls the starting of the genset 110, and at the same time, detects the operating state of the genset 110 through the AFE control module 120, wherein the operating state includes the operating voltage and the operating frequency of the genset 110; as shown in fig. 2, the AFE control module 120 is provided with a rectifying module 121 and a detecting module 122, an input end of the rectifying module 121 is connected to an output end of the genset 110, and an output end of the rectifying module 121 is connected in parallel to the dc bus 200, and is configured to rectify a current output by the genset 110 and output the current at a set constant current; the detection module 122 is connected to the genset 110 and the controller 150 for detecting an operating state of the genset 110, specifically, an operating voltage and an operating frequency of the genset 110.
Specifically, the detection module 122 detects the operating voltage and the operating frequency of the generator set 110, and the detection module 122 realizes the operating voltage and the operating frequency by using the existing voltage detection circuit; after the operating voltage and the operating frequency are acquired, the detection module 122 sends the operating voltage and the operating frequency to the controller 150, in order to realize constant current output of the generator set 110, after the controller 150 judges that the generator set 110 operates stably according to the operating voltage and the operating frequency, the rectifier module 121 charges the battery pack 130 according to the set voltage and current, meanwhile, because the rectified current is connected to the direct current bus 200 in parallel, the constant current which can be output is output to the direct current bus 200, and simultaneously, the current which is output by combining the battery pack 130 connected to the direct current bus 200 in parallel is supplied to the first load 180 after passing through the DC/AC converter; similarly, the current is output to the dc bus 200 according to the preset constant current, and the current output by the battery pack 130 connected in parallel to the dc bus 200 is combined to supply power to the second load 190; because the generator set 110 outputs a constant current to the dc bus 200 after the rectification control of the AFE control module 120, sufficient power can be provided to the second load 190.
In practical operation, the current (i.e. power) rectified by the AFE control module 120 is set to the most economical operation state of the genset 110, so that the genset 110 can be ensured to operate smoothly at the most economical operation power no matter how the first load 180 and the second load 190 change due to the controllable rectification of the AFE control module 120 during the whole charging process. Furthermore, even when the real-time SOC of the battery pack 130 is only close to the upper limit value during the charging process, due to the controllable rectification limitation of the AFE control module 120, in the embodiment, the dc voltage output by the genset 110 through the AFE control module 120 may be set to be higher than the voltage when the SOC of the battery pack 130 operates at the highest value, thereby ensuring that the constant power charging is still maintained when the real-time SOC of the battery pack 130 is close to the upper limit value; and when the controller 150 obtains that the battery management module 140 detects that the real-time SOC value of the battery pack 130 reaches the working upper limit value, the controller 150 sends an instruction to turn off the generator set 110 until the battery management module 140 detects that the real-time SOC value of the battery pack 130 is lower than the set lowest SOC value and turns on again, and the operation of charging the battery pack 130 is realized in such a cycle.
The detection module 122 may be provided with a voltage sensor and a rotation speed sensor, and specifically, the operation voltage detection operation of the generator set 110 is realized by the voltage sensor; the operation of detecting the operating frequency of the generator set is realized through the rotating speed sensor, so that the AFE control module 120 is used for realizing that the generator set 110 is always under the most economic operating power in the process from the beginning to the end of charging the battery pack 130 by the generator set 110, the operation is stable, the fuel efficiency is highest, the maintenance period is prolonged, the service life of the diesel engine set is greatly prolonged, and good economic benefit is realized. Meanwhile, the whole charging process is kept under constant charging power, so that the problem that the whole charging time is prolonged due to the fact that the charging current is very small in the last stage of the charging process in the traditional charging process is solved; furthermore, the running time of the generator set is reduced.
In this embodiment, the hybrid power system is further provided with an HMI, specifically, the controller 150 is in communication connection with the HMI, and visual management control and operation can be realized through the HMI, so that the controller 150 can realize a visual function through the mobile terminal, such as the operating voltage and the operating frequency data of the generator set 110 acquired from the AFE control module 120, and the SOC value of the battery pack acquired from the battery management module 140, which is convenient for knowing the actual operation condition of the entire hybrid power system.
Preferably, the controller 150 in this embodiment implements the analysis control function through a PLC control system.
After the hybrid power system and the crane using the hybrid power system are adopted, the battery management system monitors the running parameters of the battery pack such as SOC and transmits a corresponding SOC value to the PLC system, the PLC system compares the obtained SOC value with the preset minimum SOC value of the battery pack, and if the SOC value is lower than the preset minimum SOC value, the PLC system controls the generator set to start to charge the battery pack; specifically, the operation voltage and the operation frequency of the generator set are detected through the AFE control module, and whether the generator set operates stably is judged through the PLC control system according to the detection result, so that the battery pack is charged through the generator set, and the charging operation of stable power or stable voltage is provided; therefore, the possibility of flameout caused by sudden loading can be avoided, and the sufficient electric power of the crane using the hybrid power system is ensured; meanwhile, the charging is carried out through constant power or voltage, the charging time of the battery pack can be shortened, the operation of the generator set is reduced, and the service life of the generator set is prolonged.
Based on the same conception, in one embodiment, the utility model also provides an use the above-mentioned hoist of hybrid power system, this hoist can realize that the battery pack charging process charging power is invariable to shorten the charge time, reduce the operation of generating set; after the generator set 110 is rectified by the AFE control module 120, the battery pack is charged with preset constant power in the whole charging process, and the energy supply operation is performed on the first load 180 (i.e. electric equipment such as a signal device, an ignition system and an instrument device of a crane) and the second load 190 (an actuating mechanism of the crane) by combining the current output by the battery pack 130 to the direct current bus 200, and the charging power/voltage can be set in the most economical running state of the generator set 110, so that when the generator set 110 such as a diesel engine set is charged and/or used as a power source of the crane, the fuel combustion efficiency is high, and the pollution of exhaust emission to the atmosphere is reduced; in addition, the AFE control module 120 can detect the operating voltage and the operating frequency of the generator set 110 in the process of starting the charging of the generator set 110, so that the AFE control module 120 can be started after the generator set operates stably, the current output by the generator set 110 is rectified and then is output to the direct current bus 200 in a constant size, the sudden loading condition caused by the increase of the load in the traditional hybrid power system is avoided, the problem that the flameout is easily caused by starting the charging of the generator set in the traditional mode is avoided, the operating life of the generator set can be prolonged, the maintenance period is prolonged, and the crane can meet the requirements of different working conditions on the battery pack and the standards of safe and efficient production of a wharf.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A hybrid powertrain system, comprising: group battery, generating set, battery management module, AFE control module and controller, wherein:
the battery management module is arranged between the battery pack and the controller and used for monitoring the battery pack in real time and transmitting the result of the real-time monitoring to the controller;
the AFE control module is arranged at the output end of the generator set and used for detecting the running state of the generator set and rectifying the current output by the generator set; the controller is connected with the generator set and the AFE control module;
the battery pack is used for providing power energy for the system, the generator set is used for charging the battery pack and providing power energy for the system, and the output current of the battery pack and the rectified output current of the generator set passing through the AFE control module are connected to the same direct current bus in parallel.
2. The hybrid system according to claim 1, further comprising a dc control module, wherein the dc control module is disposed at an output end of the battery pack, the dc control module is configured to control an output power of the battery pack, and an output current of the battery pack passes through the dc control module and then is connected in parallel to the dc bus.
3. The hybrid system of claim 1, wherein the AFE control module includes a detection module and a rectification module, the detection module being coupled to the genset and the controller for detecting an operating voltage and an operating frequency of the genset;
the rectifying module is connected with the generator set and the battery pack and used for rectifying the current output by the generator set.
4. The hybrid system of claim 3, wherein the detection module includes a voltage sensor and a speed sensor, the voltage sensor for detecting an operating voltage of the generator set; the rotating speed sensor is used for detecting the operating frequency of the generator set.
5. The hybrid system according to claim 4, wherein the battery management module includes an SOC monitoring unit for detecting an SOC value of the battery pack in real time.
6. The hybrid system of claim 1, further comprising an HMI, the controller communicatively coupled to the HMI.
7. The hybrid system of claim 6, wherein the controller is a PLC control system.
8. A hybrid system according to claim 1 or 2, wherein the system is further provided with a DC/AC converter connected in parallel with the DC bus.
9. The hybrid system of claim 1, wherein the battery pack is a lithium-ion battery pack.
10. A crane comprising a hybrid system as claimed in any one of claims 1 to 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111416429A (en) * | 2020-04-13 | 2020-07-14 | 中国移动通信集团内蒙古有限公司 | Generator load method, apparatus, device and computer readable storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111416429A (en) * | 2020-04-13 | 2020-07-14 | 中国移动通信集团内蒙古有限公司 | Generator load method, apparatus, device and computer readable storage medium |
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Effective date of registration: 20211206 Address after: 518000 Gangwan Avenue, Shekou Industrial Zone, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SHEKOU CONTAINER TERMINALS Ltd. Patentee after: Haitong (Shanghai) Trading Co.,Ltd. Patentee after: HOI TUNG INNOTEK (SHENZHEN) Co.,Ltd. Address before: 914, 915, Nanhai yikumeng workshop building, No.1, Gongye 3rd road, Shuiwan community, merchants street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: HOI TUNG INNOTEK (SHENZHEN) Co.,Ltd. |