CN107298025B - Urban rail transit renewable energy management system - Google Patents
Urban rail transit renewable energy management system Download PDFInfo
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- CN107298025B CN107298025B CN201710460603.3A CN201710460603A CN107298025B CN 107298025 B CN107298025 B CN 107298025B CN 201710460603 A CN201710460603 A CN 201710460603A CN 107298025 B CN107298025 B CN 107298025B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks
- H02J4/20—Networks integrating separated AC and DC power sections
- H02J4/25—Networks integrating separated AC and DC power sections for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system
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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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention provides an urban rail transit regenerative energy management system which comprises a system monitoring module and a direct current voltage reduction module, wherein the system monitoring module detects the direct current bus voltage of urban rail transit, when the direct current bus voltage is detected to be higher than a set value, the direct current voltage reduction module is started to reduce the voltage to supply power for AC220V frequency conversion equipment, AC 380V frequency conversion equipment or other direct current power supply equipment, the output voltage of the direct current voltage reduction module is higher than AC220V rectification voltage, the system does not feed power to a power grid, does not need energy storage equipment to store energy, but directly supplies power for other equipment in an urban rail transit station nearby, and regenerative energy is utilized to the maximum.
Description
Technical Field
The invention relates to the technical field of renewable energy, in particular to an urban rail transit renewable energy management system.
Background
With the improvement of the regenerative braking capability of the rail transit vehicle, the absorption and utilization of the regenerative braking capability of the train become one of the main energy-saving and emission-reduction measures for urban rail transit operation. When the train is regeneratively braked, the electric working condition of the traction motor is converted into the power generation working condition, the kinetic energy of the train is converted into electric energy, most of the electric energy is fed back to the direct current traction network except for part of the electric energy consumed by the auxiliary power equipment of the regenerative train, and at present, 20% -60% of the kinetic energy of the train can be converted into electric energy by the regenerative brake and fed back to the direct current network.
Disclosure of Invention
The utility model provides an urban rail transit renewable energy management system, this system no longer need not the energy storage equipment to the electric wire netting feed, also need not to store energy, but directly supplies power for other equipment in the urban rail transit station nearby, has utilized renewable energy to the maximize.
The method is realized by adopting the following technical scheme:
an urban rail transit renewable energy management system comprises a system monitoring module and a direct current voltage reduction module, wherein the system monitoring module detects the direct current bus voltage of urban rail transit, and when the direct current bus voltage is detected to be higher than a set value, the direct current voltage reduction module is started to reduce the voltage, the direct current voltage reduction module comprises a direct current voltage reduction module 1, a direct current voltage reduction module 2 and a direct current voltage reduction module 3, the output end of the direct current voltage reduction module 1 is connected with an AC220V rectification voltage in parallel to supply power for other equipment, the output voltage of the direct current voltage reduction module 1 is higher than the AC220V rectification voltage, the output end of the direct current voltage reduction module 2 is connected with an AC220V frequency converter direct current bus through a diode to supply power for AC220V frequency conversion equipment, the output voltage of the direct current voltage reduction module 2 is higher than the AC220V rectification voltage, the output end of the direct current voltage reduction module 3 is connected with a direct current bus of an AC 380V frequency converter through a diode to supply power for AC 380V frequency conversion equipment, and the output voltage of the direct current voltage reduction module 3 is higher than the AC 380V rectification voltage.
The renewable energy that this urban rail transit renewable energy management system produced no longer feeds to the electric wire netting, also need not the energy storage, but supplies power for other equipment in the urban rail transit nearby, and because of need not the energy storage, does not need the energy storage subassembly, has reduced the operation maintenance cost of system.
Further, the dc voltage reducing module 1 includes a switching tube M1, a filter inductor L1, and a diode D2, wherein the switching tube M1 is connected in series with the filter inductor L1, a cathode of the diode D2 is connected between the switching tube M1 and the filter inductor L1, an anode of the diode D2 is grounded, the dc voltage reducing module 2 includes a switching tube M2, a filter inductor L2, and a diode D3, and a circuit structure thereof is the same as that of the dc voltage reducing module 1, and the dc voltage reducing module 3 includes a switching tube M3, a filter inductor L3, and a diode D4, and a circuit structure thereof is the same as that of the dc voltage reducing module 1.
As a preferable technical solution, the switching tube M1 is a power transistor, a source of the power transistor is connected to the filter inductor L1, an anode of the diode D2 is grounded, and a cathode of the diode D2 is connected between the source of the power transistor and the filter inductor L1.
Further, the system monitoring module includes microcontroller, sampling unit, on-off control unit, DA reference cell and data transmission unit, wherein, microcontroller respectively with sampling unit, on-off control unit, DA reference cell and data transmission unit connect, the sampling unit is optical coupling isolation sampling, and its sampling signal includes direct current bus voltage, feed current, direct current voltage reduction module output voltage, direct current voltage reduction module output current and grid voltage.
Furthermore, the urban rail transit regenerated energy management system comprises N direct-current voltage reduction modules 1, M direct-current voltage reduction modules 2 and L direct-current voltage reduction modules 3, wherein N is larger than or equal to 0, M is larger than or equal to 0, and L is larger than or equal to 0.
Compared with the prior art, the technical scheme that this application provided, the technological effect or advantage that have are:
1. the renewable energy generated by the urban rail transit renewable energy management system does not feed the power grid any more, does not need energy storage, but supplies power to other equipment in the urban rail transit nearby, and does not need energy storage and energy storage assemblies, so that the operation and maintenance cost of the system is reduced;
2. the magnitude of the regenerated energy is judged by detecting a high-voltage direct-current bus of the urban rail transit, so that intelligent control is realized, and the regenerated energy is utilized to the maximum extent;
3. the regenerated energy and the power grid energy are connected in parallel to supply power to other equipment, so that electric energy complementation is formed, normal operation of other equipment is not influenced, and the operation reliability of the urban rail transit equipment is ensured;
4. the regenerated energy is utilized nearby in a direct current conversion mode without inversion.
Drawings
FIG. 1 is a schematic structural diagram of an urban rail transit regenerative energy management system;
fig. 2 is a schematic diagram of a system monitoring module.
Detailed Description
The embodiment of the application provides an urban rail transit regenerated energy management system, and the system does not feed power to a power grid any more, does not need energy storage equipment to store energy, and directly supplies power to other equipment in an urban rail transit station nearby, so that regenerated energy is utilized to the maximum extent.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.
Examples
An urban rail transit renewable energy management system (in this embodiment, an urban rail transit device takes a subway as an example), as shown in fig. 1, includes a system monitoring module and a dc voltage reduction module, where the system monitoring module detects a dc bus voltage of the urban rail transit, and when it is detected that the dc bus voltage is higher than a set value, the dc voltage reduction module is started to reduce the voltage. When a subway enters a station, great regenerative energy can be generated due to braking, the voltage of a subway direct-current bus can be increased due to the regenerative energy, and when the system monitoring module detects that the voltage of the subway direct-current bus exceeds a set voltage value, the direct-current voltage reduction module is started to reduce the voltage.
The regenerated energy generated by the urban rail transit regenerated energy management system no longer feeds electricity to a power grid, does not need energy storage, supplies power to other equipment in the urban rail transit nearby, and does not need an energy storage assembly due to the fact that energy storage is not needed, and the operation and maintenance cost of the system is reduced.
The direct current voltage reduction module comprises a direct current voltage reduction module 1, a direct current voltage reduction module 2 and a direct current voltage reduction module 3, the output end of the direct current voltage reduction module 1 is connected with AC220V rectified voltage in parallel and then supplies power for other equipment, the anode of a diode D1 is connected with the output end of the direct current voltage reduction module 1, and the cathode of a diode D1 is connected with AC220V rectified voltage, because the output voltage of the direct current voltage reduction module 1 is higher than the AC220V rectified voltage, so that the regenerated energy is guaranteed to be preferentially adopted to supply power for electric equipment, and the electric equipment can be a lighting system or an electronic rectifier or other equipment capable of supplying power with direct current.
The output of direct current voltage reduction module 2 links to each other for AC220V frequency conversion equipment power supply through diode and AC220V converter direct current bus, because the output voltage of direct current voltage reduction module 2 is higher than AC220V rectified voltage, thereby guarantee to preferentially adopt renewable energy for the consumer power supply, all be equipped with the diode between the frequency conversion equipment of difference and keep apart, make and not produce interference between the frequency conversion equipment, guarantee that every equipment all moves independently, in this embodiment, diode D5's anodal is connected the output of direct current voltage reduction module 2, AC220V converter direct current bus is connected to diode D5's negative pole, for frequency conversion equipment 1 power supply, diode D6's anodal is connected the output of direct current voltage reduction module 2, AC220V converter direct current bus is connected to diode D6's negative pole, for frequency conversion equipment 2 power supply, analogize in proper order.
The output end of the direct current voltage reduction module 3 is connected with a direct current bus of an AC 380V frequency converter through a diode to supply power for AC 380V frequency conversion equipment, and the output voltage of the direct current voltage reduction module 3 is higher than the AC220V rectification voltage. Because the output voltage of direct current step-down module 3 is higher than AC 380V rectification voltage to guarantee to preferentially adopt renewable energy to supply power for consumer, all be equipped with the diode between the inverter of difference and keep apart, make can not produce the interference between the inverter, guarantee that every equipment all operates independently, in this embodiment, diode D7's positive pole is connected the output of direct current step-down module 3, AC 380V converter direct current bus is connected to diode D7's negative pole, for inverter 3 supplies power, diode D8's positive pole is connected the output of direct current step-down module 3, AC 380V converter direct current bus is connected to diode D8's negative pole, for inverter 4 supplies power, analogize in proper order.
The urban rail transit regenerative energy management system comprises N direct-current voltage reduction modules 1, M direct-current voltage reduction modules 2 and L direct-current voltage reduction modules 3, wherein N is larger than or equal to 0, M is larger than or equal to 0, and L is larger than or equal to 0. In this embodiment, the system for managing renewable energy of urban rail transit includes a dc voltage reduction module 1, a dc voltage reduction module 2, and a dc voltage reduction module 3.
The dc voltage reduction module 1 includes a switch tube M1, a filter inductor L1 and a diode D2, wherein the switch tube M1 is a power transistor, a source of the power transistor is connected to the filter inductor L1, an anode of the diode D2 is grounded, and a cathode of the diode D2 is connected between the source of the power transistor and the filter inductor L1. The dc voltage reduction module 2 includes a switch tube M2, a filter inductor L2, and a diode D3, and the circuit structure thereof is the same as that of the dc voltage reduction module 1, and the dc voltage reduction module 3 includes a switch tube M3, a filter inductor L3, and a diode D4, and the circuit structure thereof is the same as that of the dc voltage reduction module 1.
The switching tube M1 is a power MOS tube, an IGBT or other electronic switching devices.
When the system monitoring module detects that the voltage of the direct current bus rises and exceeds a set value, the direct current voltage reduction module is startedModule, giving PWM signal, switching tube M1 is opened, input voltage VIThe DC voltage reduction module supplies power to a load after being filtered by a filter inductor L1, when a switching tube M1 is cut off, the filter inductor L1 and a diode D2 form an output follow current loop to continuously provide energy for the load, and the output voltage V of the DC voltage reduction moduleo＝VIXD, D is the duty ratio of PWM signal, D is less than or equal to 1, so that the output voltage VoIs always lower than the input voltage VIAnd each direct current voltage reduction module adopts output constant voltage and constant current control, and the output power is controlled by the system monitoring module.
As shown in fig. 2, the system monitoring module includes microcontroller, sampling unit, on-off control unit, DA reference unit and data transmission unit, wherein, microcontroller respectively with sampling unit, on-off control unit, DA reference unit and data transmission unit are connected, the sampling unit is optical coupling isolation sampling, and its sampling signal includes subway system's direct current bus voltage, feed current, direct current step-down module output voltage, output current and grid voltage, the microcontroller that the data transmission unit is responsible for data transmission here between system monitoring module and host computer can be for singlechip or DSP. The system monitoring module detects the voltage of a subway direct-current bus through the sampling unit to judge the working state of the subway system, controls the switch control unit to open a corresponding direct-current voltage reduction module when the subway system is detected to work in a feeding state, sets the output voltage and the current reference of the direct-current voltage reduction module through the DA reference unit, and adjusts the output power of the direct-current voltage reduction module by adjusting the size of a reference signal, so that the voltage of the subway direct-current bus is maintained in a relatively stable range and cannot be lower than the rated voltage, and the subway feeding is transferred to other loads to the greatest extent. When the system monitoring unit detects that the voltage of the subway direct-current bus is reduced below a set value, the switch control unit is controlled to turn off all the direct-current voltage reduction modules, and due to the fact that the unidirectional conducting diode D1, the diode D5, the diode D6, the diode D7 and the diode D8 are added, electric energy can only be regenerated energy to supply power to other loads, the other loads cannot supply power to the subway direct-current bus, and therefore safe operation of the subway direct-current bus is guaranteed. When the power supply load power is larger than the regeneration energy of the subway, the system monitoring module can automatically cut off part of the load or reduce the power supply voltage to the load so as to ensure that the subway direct current bus is not pulled down to be below the rated voltage by other loads and simultaneously utilize the regeneration energy to the maximum extent.
In the above-mentioned embodiment of this application, through providing an urban rail transit renewable energy management system, including system monitoring module, direct current step-down module, wherein, system monitoring module detects urban rail transit's direct current bus voltage, when detecting direct current bus voltage and being higher than the setting value, starts direct current step-down module step-down is supplied power for AC220V frequency conversion equipment, AC 380V frequency conversion equipment and other power supply unit, the output voltage of direct current step-down module all is higher than AC220V rectified voltage, and this system no longer feeds to the electric wire netting, also need not energy storage equipment and carries out the energy storage, but directly supplies power for other equipment in the urban rail transit station nearby, has utilized renewable energy to the maximize.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710460603.3A CN107298025B (en) | 2017-06-18 | 2017-06-18 | Urban rail transit renewable energy management system |
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| CN201710460603.3A CN107298025B (en) | 2017-06-18 | 2017-06-18 | Urban rail transit renewable energy management system |
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| CN107298025A CN107298025A (en) | 2017-10-27 |
| CN107298025B true CN107298025B (en) | 2022-07-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108622143B (en) * | 2018-04-20 | 2020-09-08 | 中国神华能源股份有限公司 | Method and system for processing data of locomotive, locomotive and server |
| CN111532144B (en) * | 2020-04-24 | 2024-05-31 | 北京北交新能科技有限公司 | A grid-free self-propelled energy storage and high-frequency auxiliary conversion system for rail transit |
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