CN219420313U - Centralized electric energy management device for electric stretching equipment and electric stretching equipment - Google Patents
Centralized electric energy management device for electric stretching equipment and electric stretching equipment Download PDFInfo
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- CN219420313U CN219420313U CN202320082243.9U CN202320082243U CN219420313U CN 219420313 U CN219420313 U CN 219420313U CN 202320082243 U CN202320082243 U CN 202320082243U CN 219420313 U CN219420313 U CN 219420313U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
There is provided a centralized power management apparatus for an electric traction device comprising a common power battery configured to be adapted to power each electric traction machine and electric tension machine and to be charged by the electric power generation of the electric tension machine's motor; a battery management system configured to control and monitor the power battery; and a power distribution unit having an input port connected to the power cell and a plurality of output ports configured to be connected to each of the electric traction machine and the electric tensioner. An electric stretching device is also provided. The electric traction machine and the electric tension machine in the electric traction device do not need to be provided with separate power batteries.
Description
Technical Field
The present application relates to a centralized power management device for an electric traction apparatus and an electric traction apparatus comprising such a centralized power management device.
Background
In the high-voltage transmission line wiring operation, a traction field and a tension field are required to be arranged, and a plurality of towers are arranged between the traction field and the tension field. The traction field and the tension field are typically arranged with the traction machine and the tension machine corresponding to each other. The drive source of the traditional tractor and tensioner is a diesel engine. When the tension machine works under the tension working condition, hydraulic oil is released to generate heat through the overflow valve of the closed hydraulic system, and energy waste can be generated.
At present, no electric traction machine and tension machine driven by a permanent magnet synchronous motor with a high-voltage lithium battery as a power source exist. The electric traction machine and the tension machine have little environmental pollution, and when the tension machine works, the electric motor can be used as a generator to generate electricity so as to realize the energy recovery of the traction machine at the partial contralateral traction field. If the single electric traction machine and the tension machine are respectively provided with the power batteries arranged on the frame according to the existing machine structure, the problem that the electric tension machine cannot utilize the electric energy fully charged by energy recovery to the electric traction machine exists, and the field operation complexity is increased by adopting a battery power conversion scheme.
Disclosure of Invention
An object of the present application is to provide an innovative electric stretching device architecture and control solution, which solves the problem that if each electric tractor and each tensioner are respectively equipped with a power battery in a tension field, the electric energy recovered by the tensioner cannot be directly utilized by the tractor without increasing the control complexity.
To this end, the present application proposes a centralized power management device for an electric stretching apparatus comprising at least one electric traction machine and at least one electric tension machine; the centralized power management apparatus includes:
a common power battery configured to be adapted to power each of the electric traction machine and the electric tension machine and to be charged by the electric power generated by the electric motor of the electric tension machine;
a battery management system configured to control and monitor the power battery; and
and a power distribution unit having an input port connected to the power cell and a plurality of output ports configured to be connected to each of the electric traction machine and the electric tension machine.
In one embodiment, the power battery, battery management system, and power distribution unit are integrated within one power supply station or power supply container.
In one embodiment, the centralized electric energy management device further comprises a range-extending engine and a generator driven by the range-extending engine, wherein the generator is connected with a charging port of the power distribution unit through an AC-DC motor controller and is used for charging the power battery or supplementing electricity for the electric stretching equipment in operation.
In one embodiment, the centralized power management device further comprises an auxiliary battery connected to the power distribution unit via a DC-DC converter, the auxiliary battery being configured to be charged by the power of the power battery.
In one embodiment, the centralized power management apparatus further comprises an external port (18 a) connected to the power distribution unit via a DC-AC converter and/or a DC-DC converter, the external port being configured to connect to a power consuming device.
In one embodiment, the centralized power management device further comprises a hydraulic pump station connected with the power distribution unit through a DC-AC converter, and the hydraulic pump station is used for realizing the residual power consumption of the motor of the electric tensioner under the condition that the power battery allows low charging current.
In one embodiment, the hydraulic pump station comprises an electric proportional variable pump, wherein the electric proportional variable pump and the overflow valve are matched to overflow to consume energy.
In another aspect, the present application provides an electrically powered tensioning device comprising:
at least one electric traction machine and at least one electric tension machine; and
the power cells in the centralized power management device are configured to supply power to each electric traction machine and the electric tension machine and to be charged by the electric motor of the electric tension machine.
In one embodiment, the electric traction device is a traction field electric traction device comprising at least three electric traction machines and at least one electric tension machine. In another embodiment, the motorized tensioning device is a tension field motorized tensioning device comprising at least one motorized tractor and at least three motorized tensioners.
In one embodiment, the electric stretching device further comprises a control unit connected to the centralized power management device, the electric traction machine and the electric tension machine through a CAN bus.
A centralized power management apparatus for an electric tensioning device according to the present application includes a common power battery and energy distribution station for powering each of the tractors and tensioners without each of the tractors and tensioners being equipped with a separate power battery. In this way, equipment costs are saved and the power of the power cells is easier to control and distribute.
Drawings
The application may be further understood by reading the following detailed description with reference to the drawings in which:
fig. 1 is a schematic view of an electric traction device according to the present application when erecting a high voltage transmission line;
FIG. 2 illustrates a schematic layout of one embodiment of a centralized power management apparatus for an electric traction device according to the present application;
fig. 3 shows a schematic layout of one embodiment of an electric stretcher according to the present application.
Detailed Description
The present application relates generally to an electric tensioning device for overhead line operation of a high voltage transmission line. As schematically shown in fig. 1, when a high-voltage transmission line is wired, a traction field and a tension field spaced apart from each other by several kilometers need to be provided, and a plurality of towers 1 are installed between the traction field and the tension field. And electric stretching equipment is respectively arranged in the traction field and the tension field.
The electric traction device of the traction field (left in fig. 1) generally comprises three electric traction machines 2 (one shown in the figure) and one electric tension machine (not shown in the figure), and the electric traction device of the tension field (right in fig. 1) generally comprises a corresponding one electric traction machine (not shown in the figure) and three electric tension machines 3 (one shown in the figure).
It is understood that the motorized tensioning device of the present application, which is disposed in the traction field and the tension field, may include other numbers of motorized tractors and tensioners, respectively.
The tractor and the tensioner will be collectively referred to as a tensioner hereinafter. The power of the tension machine of the traction field is generally greater than the power of the tension machine of the tension field. The stretching machine in the application can also comprise a traction-tension machine integrated machine.
The present application proposes to equip each of the tension machines in the traction and tension fields with a common centralized power management device comprising a common power battery for powering each of the tension machines. Each stretching machine does not need to be provided with a separate power battery.
Except that each electric stretching machine is not provided with a power battery, the structure of the electric stretching machine is not modified, and therefore the specific structure of the electric stretching machine is not described in the application.
An exemplary embodiment of a centralized power management apparatus for use in an electric tensioning device according to the present application is schematically illustrated in fig. 2, which contains a common power cell 10 for powering each electric tensioning machine in the electric tensioning device. The electric stretching device suitable for the centralized electric energy management device can be an electric stretching device of a traction field or an electric stretching device of a tension field, and the difference between the electric stretching device and the electric stretching device is only the number of the traction machines and the tension machines.
The power cell 10 is a rechargeable high voltage battery, such as a high voltage lithium battery. The high voltage battery used in the electric stretching apparatus outputs a dc voltage of typically hundreds of volts, for example 650 volts.
The power battery 10 is equipped with a Battery Management System (BMS) 11 for controlling and monitoring the power battery 10.
The electrodes of the power cell 10 are connected to input ports of a power distribution unit (PDU, or power distribution unit) 12. The power distribution unit 12 has multiple standard output ports, wherein multiple output ports 12a are used for power transmission with each electric tension machine in the electric tension device. In addition, when the electric stretching device works, the tension machine is dragged, the motor of the tension machine is in a working condition of a generator, and the generated alternating current is converted into direct current through a DC-AC motor controller of the tension machine and charges the power battery 10 through the output port 12a and the power distribution unit 12.
It is to be noted that the number of electric stretching machines connected via the output port 12a of the power distribution unit 12 may be different depending on the specific situation of each electric stretching apparatus. The power distribution unit 12 constitutes a common energy distribution element for each electric stretcher.
The centralized power management apparatus may further include an extended range engine 13, a generator 14 driven by the extended range engine 13, an AC-DC motor controller 15 connected to the generator 14, and the AC-DC motor controller 15 connected to one of the charging ports of the power distribution unit 12. In this way, the range-extending engine 13 can be used to drive the generator 14 to charge the power battery 10 or to supplement the power of the electric stretching device in operation. Of course, the power cell 10 may be charged by other means (e.g., direct current fast charge).
The power distribution unit 12 is also connected to a DC-DC converter 16 at one output port, and the DC-DC converter 16 is connected to an auxiliary battery (low-voltage battery) 17 for charging the auxiliary battery 17 with the electric energy of the power battery 10, the auxiliary battery 17 being mainly used for supplying low-voltage direct current to the battery management system BMS 11 and other low-voltage power consuming elements in the centralized electric energy management device.
The centralized power management apparatus may further include a DC-AC converter 18 (and/or a DC-DC converter) connected to one of the output ports of the power distribution unit 12 and to the external port 18a for supplying the power from the power cell 10 or the generated power from the tensioner in the form of three-phase alternating current (and/or direct current) to a power consuming device, such as a lighting device or a centralized control device, connected through the external port 18 a.
The centralized power management device may also include a hydraulic pump station. Specifically, a DC-AC motor controller 19 is provided, which is connected to one output port of the power distribution unit 12, on the one hand, and to a pump motor 20 of a hydraulic pump 21 in the hydraulic pump station, on the other hand. According to one embodiment, the hydraulic pump 21 is an electro-proportional hydraulic variable pump that may be used in conjunction with a relief valve (not shown) to allow the electrical energy recovered by the tensioner to be used in traction machines and other electrical consumers while the power cell is allowing low charging current (high SOC or low temperature conditions) to still remain depleted of electrical energy, particularly by increasing the displacement, speed or pressure of the relief valve of the pump to provide additional relief heating. It will be appreciated that other power consuming devices may also be connected to the power distribution unit 12 through the external port 18a to consume power generated from the motor of the tensioner when the power of the power cell 10 has reached a maximum power, in order to protect the power cell 10. This is particularly advantageous for electric tensioning devices for tensioning fields, since a plurality of tensioners of the tensioning field are often operated and generate electricity simultaneously for a long period of time. For a particular power cell, its respective gear charge current (including low charge current) is defined by a corresponding current threshold.
The centralized power management device may be configured in the form of a power supply station or power supply container that incorporates the common power cell 10 as well as the other elements described above. Any one of the stretching machines need not be equipped with a separate power battery, but is uniformly powered by the power battery 10. This configuration simplifies the construction of the electric traction device, reduces costs, and facilitates the distribution of electric energy among the electric power. The power supply container type design is suitable for a fixed workplace of a traction field and a tension field, and is convenient to transport.
As the common power cell 10 in the centralized power management apparatus, one power cell 10 may be generally provided; but if one power cell 10 cannot provide the required power, two or more common power cells 10 may be provided, all of which are integrated in the same centralized power management device.
The electric stretching device can comprise the centralized electric energy management device and a plurality of electric stretching machines which are uniformly powered by the centralized electric energy management device. Further, the electric stretching apparatus includes a control unit 22. The control unit 22 is connected to the battery management system 11, the DC-DC converter 16, the DC-AC converter 19, the hydraulic pump 21 (and/or a not-shown relief valve), etc. via a CAN bus 23 for controlling their operation. When the hydraulic pump 21 is a hydraulic variable displacement pump, the displacement control thereof is also performed by the control unit 22. Each output port 23a on the CAN bus 23 may be connected to a respective controller of each stretcher.
The control unit 22 and the man-machine interface (including various control buttons, switches, displays, etc.) connected thereto may be integrated in a control box.
The charging of the power battery 10 is managed by a battery management system 11. When the motor of the tensioner is used as a generator to charge the power cell 10, the control unit 22 may control coordination of other power consuming devices (energy consuming devices, such as with a hydraulic pump station) with the electric traction machine to consume the electric energy generated by the electric tensioner in order to protect the power cell 10 and/or other high voltage devices, such as a DC-AC motor controller, if the power cell 10 is in a state that allows for a low charging current (high SOC or low temperature condition).
An exemplary layout of the motorized tensioning machine in the motorized tensioning device of the present application is shown in fig. 3. The electric stretcher comprises a Power Distribution Unit (PDU) 30, wherein an input port 30a of the power distribution unit 30 can be connected to one output port 12a of the power distribution unit 12 through a line so as to realize electric energy exchange between the centralized electric energy management device and the electric stretcher.
Typically an electric traction machine has two motors 31, each motor 31 being equipped with a respective DC-AC motor controller 32, and each motor 31 driving a respective spool through a respective speed change mechanism 33. The power distribution unit 30 has multiple standard output ports, two of which are connected to two DC-AC motor controllers 32 of the electric stretcher, respectively.
It should be noted that the number of motors in an electric traction machine may vary. Regardless of the number of motors, its DC-AC motor controller is connected to the power distribution unit 30 for harvesting by the power distribution unit 30 or feeding back power to the power distribution unit 30.
The power distribution unit 30 further has an output port connected to a DC-DC converter 34, which DC-DC converter 34 is connected to an auxiliary battery (low-voltage battery) 35 for charging the auxiliary battery 35 with electrical energy from the power battery 10, the auxiliary battery 35 being mainly used for supplying low-voltage direct current to low-voltage power consuming components in the electric traction machine.
Each electric traction machine also includes its own controller 36. The controller 36 is connected to the DC-AC motor controller 32, the DC-DC converter 34, and the like for controlling the torque, the rotational speed, and the like of the motor. The controller 36 may also be connected to the control unit 22 via an output port 36a of the CAN bus. The operation of the entire motorized tensioning device requires coordinated control and information interaction of the various controllers 36 via the control unit 22.
The various components referred to in this application, such as power cells, battery management systems, DC-AC motor controllers, AC-DC motor controllers, DC-AC converters, DC-DC converters, motors, generators, etc., may take the form of commercially available products that are well known to those skilled in the art and are not described herein.
Those skilled in the art, with the benefit of the present application, may make various modifications to the motorized tensioning device based on the particular application.
An electric tensioning device according to the present application comprises a plurality of electric tensioners and a common centralized power management device comprising a common power battery and an energy distribution station for powering the electric tensioners, each electric tensioner and electric tensioner not being equipped with a separate power battery. In this way, equipment costs are saved and power management is easier. In addition, when the electric tension machine works, the motor of the electric tension machine is used as a generator to charge a power battery, and the electric tension machine can also be directly used for the work of the electric traction machine, so that the recovery and the reutilization of part of traction field energy are realized. Under the condition that the power battery allows low charging current (high SOC or low temperature condition), the electric energy generated by the electric tensioner can be used for supplying power to other power consumption equipment, so that the power battery and high-voltage components are protected, and the electric energy utilization rate is improved. When the electric energy fed back by the electric tensioner and the electric energy of the public power battery can not meet the electric energy consumption of the whole system, the range extender can supplement the electric energy to the system, and the normal operation of the system can be ensured. When the electric traction machine, other energy consumption devices and the battery are charged and cannot completely consume the electric energy fed back by the electric tension machine, the hydraulic energy consumption device is actively controlled to be started so as to consume redundant energy, and the safety of the system is ensured.
Although the present application is described herein with reference to specific embodiments, the scope of the application is not intended to be limited to the details shown. Various modifications may be made to these details without departing from the underlying principles of the present application.
Claims (10)
1. A centralized power management device for an electric tensioning apparatus comprising at least one electric traction machine (2) and at least one electric tension machine (3); the centralized power management device is characterized by comprising:
a common power battery (10) configured to supply power to each of the electric traction machine and the electric tension machine and to be charged by the electric motor of the electric tension machine;
a battery management system (11) configured to control and monitor the power battery; and
a power distribution unit (12) having an input port connected to the power cell and a plurality of output ports configured to be connected to each of the electric traction machine and the electric tensioner.
2. The centralized power management apparatus for an electrically powered tensioning device of claim 1, wherein the power cells, battery management system, power distribution unit are integrated within a power supply station or power supply container.
3. The centralized power management apparatus for an electric traction device as claimed in claim 1, further comprising a range-extending engine (13) and a generator (14) driven by the range-extending engine, the generator being connected to a charging port of the power distribution unit via an AC-DC motor controller (15) for charging the power battery or supplementing the electric traction device in operation.
4. A centralized power management device for an electric traction apparatus according to any one of claims 1-3, further comprising an auxiliary battery (17) connected to the power distribution unit via a DC-DC converter, the auxiliary battery being configured to be charged by the power of the power battery.
5. A centralized power management device for an electric stretch-breaking apparatus according to any one of claims 1 to 3, further comprising an external port (18 a) connected to the power distribution unit via a DC-AC converter and/or a DC-DC converter, the external port being configured to be adapted to connect to an electric power consuming apparatus.
6. A centralized power management unit for electric stretching apparatuses according to any one of claims 1-3, further comprising a hydraulic pump station connected to said distribution unit via a DC-AC converter for achieving the remaining power consumption of the electric motor of the electric stretching machine in a state in which the power battery (10) allows a low charging current.
7. The centralized power management unit for an electric tension apparatus as recited in claim 6, wherein the hydraulic pump station comprises an electric proportional variable pump, wherein the electric proportional variable pump overflows in cooperation with an overflow valve to consume energy.
8. An electrically powered tensioning device comprising:
at least one electric traction machine (2) and at least one electric tension machine (3);
the electric stretching device is characterized by further comprising:
the centralized power management apparatus for an electric traction device of any one of claims 1-7, wherein the power cells of the centralized power management apparatus are configured to power each of the electric traction machine and the electric tensioner and to be charged by the electric motor of the electric tensioner.
9. The motorized tensioning device of claim 8, wherein the motorized tensioning device is a traction field motorized tensioning device comprising at least three motorized tractors and at least one motorized tensioner;
or the electric stretching device is tension field electric stretching device and comprises at least one electric tractor and at least three electric tensioners.
10. The motorized tensioning apparatus of claim 8 or 9, further comprising:
and a control unit (22) connected with the centralized power management device, the electric traction machine and the electric tension machine through a CAN bus (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082243.9U CN219420313U (en) | 2023-01-11 | 2023-01-11 | Centralized electric energy management device for electric stretching equipment and electric stretching equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082243.9U CN219420313U (en) | 2023-01-11 | 2023-01-11 | Centralized electric energy management device for electric stretching equipment and electric stretching equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219420313U true CN219420313U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320082243.9U Active CN219420313U (en) | 2023-01-11 | 2023-01-11 | Centralized electric energy management device for electric stretching equipment and electric stretching equipment |
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| CN (1) | CN219420313U (en) |
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2023
- 2023-01-11 CN CN202320082243.9U patent/CN219420313U/en active Active
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