CN112297931B - An intelligently controlled platform-type energy storage electric vehicle charging system and method - Google Patents
An intelligently controlled platform-type energy storage electric vehicle charging system and method Download PDFInfo
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- 230000003287 optical effect Effects 0.000 description 5
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- 238000004378 air conditioning Methods 0.000 description 1
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Classifications
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
本发明一种智能控制的站台式储能电车充电系统，包括多个充电站点，多个充电站点内均设置有供电单元、第一充电架、第二充电架和控制单元；供电单元用于输出可变的直流电压，其分别通过第一接触器、第二接触器与第一充电架、第二充电架串接形成充电回路；第一、第二充电架分别设置于充电站点的往、返站台内，可与电车的受电系统进行电性连接，从而对驶入往、返站台内的电车进行充电；控制单元用于实时监测是否有电车否驶入充电站点，并控制接通或断开对应的充电回路。该系统不仅减少充电机组数量、减小箱式变电站体积外还可实现精准控制，节省工程投资和提高运营效率，也更有利于工程实施。
The present invention discloses an intelligently controlled platform-type energy storage electric vehicle charging system, which includes a plurality of charging stations, each of which is provided with a power supply unit, a first charging rack, a second charging rack and a control unit; the power supply unit is used to output a variable DC voltage, which is connected in series with the first charging rack and the second charging rack through a first contactor and a second contactor to form a charging circuit; the first and second charging racks are respectively arranged in the on-board and return platforms of the charging station, and can be electrically connected to the electric vehicle's power receiving system, so as to charge the electric vehicle entering the on-board and return platforms; the control unit is used to monitor in real time whether there is an electric vehicle entering the charging station, and control the connection or disconnection of the corresponding charging circuit. The system not only reduces the number of charging units and the size of the box-type substation, but also can achieve precise control, save engineering investment and improve operational efficiency, and is also more conducive to engineering implementation.
Description
Technical Field
The invention belongs to the technical field of energy storage trolley bus charging and replacing, and particularly relates to an intelligent control station type energy storage trolley bus charging system and method.
Background
The electric car/tramcar engineering adopting the energy storage technologies such as super capacitors and hybrid batteries is provided with a charging station at a station, when a vehicle is driven into the station for boarding and disembarking, the charging station charges the vehicle-mounted energy storage capacitors, batteries or other energy storage components and supplements electric energy, so that the energy storage components release electric energy after the vehicle is driven away from the station to provide traction power for the vehicle and power for equipment such as lighting and air conditioning in the vehicle. Because the terminal voltages of the vehicle-mounted energy storage components of different vehicles are different at the same time, different vehicles need to provide different charging voltages. In the prior art, a corresponding number of charging units are generally arranged according to the number of vehicles which can stop, for example, two sets of charging units are arranged for charging when two vehicles which can go up and down in a general station enter the station for charging. However, the two sets of charging units are arranged, so that the equipment quantity is increased, the scale of the transformer substation is enlarged, and particularly when a box-type transformer substation is adopted, the two sets of charging units are adopted, the volume of the box-type transformer substation is large, site selection on two sides of an urban road is difficult, and engineering implementation difficulty is increased; the probability of simultaneous arrival of the vehicles going and returning is low, and the utilization rate of the equipment is low.
Thus, there are several key issues with the prior art: 1. the number of the charging units is large; 2. the charging requirements of the electric car for the forward and backward can not be met, and the potential safety hazard caused by simultaneous charging is avoided; 3. the existing control system cannot conduct intelligent judgment, so that the charging strategy is optimized, and the operation efficiency is improved.
Disclosure of Invention
In view of this, the invention provides a station type energy storage electric car charging system and method of intelligent control, the system only adopts a set of power supply unit, namely the charging unit, adopts the intelligent control method, meets the charging requirement under the condition of high probability, avoids charging two electric cars simultaneously, and simultaneously combines the energy consumption condition of the next operation interval of the electric cars to intelligently adjust the charging time, and simultaneously the configurable controller realizes intelligent automatic control, can realize accurate control besides reducing the number of the charging unit and the volume of a box type transformer substation, saves engineering investment, improves operation efficiency, and is also more beneficial to engineering implementation.
In order to achieve the above purpose, a first aspect of the present invention provides an intelligently controlled station type energy storage electric car charging system, which comprises a plurality of charging stations, wherein power supply units, a first charging frame, a second charging frame and a control unit are arranged in the plurality of charging stations;
the power supply unit is used for outputting variable direct-current voltage, and is connected with the first charging frame and the second charging frame in series through the first contactor and the second contactor respectively to form a charging loop;
The first charging frame and the second charging frame are respectively arranged in the forward platform and the backward platform of the charging station and can be electrically connected with a power receiving system of the electric car, so that the electric car entering the forward platform and the backward platform is charged; the control unit is used for monitoring whether the tram drives into the charging station in real time and controlling to switch on or off a corresponding charging loop;
the control unit can set a voltage threshold according to the power consumption of the electric car running to the next charging station, and when the electric car is charged to the voltage threshold, the control unit controls the power supply unit to stop the output of the power supply and disconnect the charging loop of the electric car to stop charging;
when the electric car continuously enters the charging station, the control unit firstly controls the charging circuit of the electric car which enters the charging station firstly to be connected and controls the charging circuit of the electric car which enters the charging station after being disconnected; and after stopping charging, controlling to switch on a charging circuit of the electric car.
Further, the control units of the adjacent charging stations are in communication connection, so that the working states of the corresponding charging stations can be monitored mutually;
and when the control unit of the first charging station monitors the fault signal of the adjacent electric station, the voltage threshold value of the charging station is set up.
Further, the control units of the charging stations are all in communication connection with a management platform, and the management platform can monitor the working states of the charging stations in real time;
When the management platform monitors a first charging station fault signal, a control signal is sent to a control unit of an adjacent charging station of the first charging station, and a voltage threshold value of the adjacent charging station is dynamically adjusted and set.
Further, the first contactor and the second contactor are respectively connected with the control unit and are used for switching on or switching off a charging loop after receiving an instruction signal of the control unit;
The first contactor and the second contactor are load switches, circuit breakers or SCR, GTO, IGBT power electronic devices.
Further, the power supply unit comprises an alternating-direct current converter, a direct current converter and a charging bus which are sequentially connected in series; the AC-DC converter and the DC converter are respectively connected with the control unit;
the alternating current-direct current converter is connected with the mains supply and is used for inputting alternating current; and starts or stops transmitting electricity according to the command signal of the control unit;
the direct current converter is used for dynamically outputting variable direct current voltage according to the terminal voltage of the electric car power receiving system; and dynamically outputting variable direct-current voltage according to the command signal of the control unit;
The charging bus is provided with a positive electrode and a negative electrode for outputting the variable direct-current voltage to the first and second charging frames, thereby forming a charging loop.
Further, the positive electrode end and the negative electrode end of the first charging frame are respectively connected with the positive electrode and the negative electrode of the charging bus in series through a first contactor to form a first charging loop; the positive electrode end and the negative electrode end of the second charging frame are respectively connected with the positive electrode and the negative electrode of the charging bus in series through a second contactor to form a second charging loop.
Further, a first isolating switch and a second isolating switch are respectively arranged in the first charging loop and the second charging loop, and the first isolating switch and the second isolating switch are both connected with the control unit and are used for receiving instruction signals of the control unit to realize power supply isolation of the first charging frame and the second charging frame when the system is in an overhaul state.
Further, a first position sensor and a second position sensor are arranged in the plurality of charging stations, and the first position sensor and the second position sensor are connected with the control unit and are used for sensing whether a tramcar drives into the platform of the charging station and transmitting position signals to the control unit.
The second aspect of the present invention provides a method for applying the intelligent control of a standing energy storage electric car charging system as described above, the method comprising:
When the control unit monitors that the tram enters the charging station to or from the charging station, a switching-on command signal is sent to a corresponding charging loop, and the first contactor or the second contactor is switched on;
After the electric car power receiving system end is electrically connected with the first charging frame or the second charging frame, the control unit sends a power supply command signal to the power supply unit, and the power supply unit dynamically outputs variable direct-current voltage according to the electric car power receiving system end voltage to charge the electric car;
the control unit sets a voltage threshold according to the power consumption of the electric car running to the next charging station, when the electric car is charged and reaches the voltage threshold, a charging stopping instruction signal is sent to the power supply unit, after the power supply unit stops outputting, the control unit sends a switching-off instruction signal to a corresponding charging loop, and the first contactor or the second contactor performs switching-off;
When the control unit monitors that the tram continuously enters the charging station and the charging station, the control unit firstly sends a first switching-on command signal to a charging loop of the first-entering tram; and after stopping charging, the first-in electric vehicle sends a second switching-on command signal to a charging loop of the second-in electric vehicle.
Further, the method further comprises:
when the control unit of the first charging station monitors a fault signal sent by an adjacent electric station, the voltage threshold value of the charging station is set up; or alternatively
When the management platform monitors a first charging station fault signal, a control signal is sent to a control unit of an adjacent charging station of the first charging station, and a voltage threshold value of the adjacent charging station is dynamically adjusted and set.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
The invention provides an intelligent control station type energy storage trolley charging system and method, wherein the system only adopts one set of power supply unit, namely, compared with the scheme of the existing two sets of charging units, one set of charging unit is reduced. In addition, the intelligent control method is adopted, the charging requirements under the condition of high probability are met, the simultaneous charging of two vehicles is avoided, meanwhile, the energy consumption condition of the next operation interval is combined, the charging time is intelligently adjusted, meanwhile, the intelligent automatic control is realized by the aid of the settable controller, the number of charging units can be reduced, the size of the box-type transformer substation is reduced, the accurate control can be realized, the engineering investment is saved, the operation efficiency is improved, and the engineering implementation is facilitated.
Drawings
FIG. 1 is a schematic diagram of a intelligently controlled, stand-by energy-storage electric vehicle charging system implemented in accordance with the present invention;
In the figure: the device comprises a 01-AC-DC converter, a 02-DC converter, a 03-positive electrode of a charging bus, a 04-negative electrode of the charging bus, a 05-first contactor, a 06-second contactor, a 07-first isolating switch, a 08-second isolating switch, a 09-positive electrode end of a first charging frame, a 10-negative electrode end of the first charging frame, a 11-positive electrode end of a second charging frame, a 12-negative electrode end of the second charging frame, a 13-first position sensor, a 14-second position sensor, a 15-signal transmission device and a 16-control unit.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
It should be noted that the term "first/second" related to the present invention is merely to distinguish similar objects, and does not represent a specific order for the objects, and it should be understood that "first/second" may interchange a specific order or precedence where allowed. It is to be understood that the "first\second" distinguishing aspects may be interchanged where appropriate to enable embodiments of the invention described herein to be implemented in sequences other than those described or illustrated herein.
According to an embodiment of the present invention, as shown in fig. 1, an intelligently controlled station type energy storage electric car charging system is provided, which comprises a plurality of charging stations, wherein a power supply unit, a first charging frame, a second charging frame and a control unit 16 are arranged in the plurality of charging stations;
The power supply unit is used for outputting variable direct-current voltage, and is connected with the first charging frame and the second charging frame in series through the first contactor 05 and the second contactor 06 respectively to form a charging loop;
The second charging frames are respectively arranged in the going-in platform and the returning platform of the charging station and can be electrically connected with the power receiving system of the electric car, so that the electric car entering the going-in platform and the returning platform is charged; the control unit 16 is used for monitoring whether the tram enters the charging station in real time and controlling to switch on or off the corresponding charging loop.
Specifically, the station-type energy storage electric car charging system with intelligent control is provided in this embodiment, the power supply unit is preferably a set of charging unit which converts commercial power into variable direct current voltage, two charging loops are connected simultaneously, the charging loops are respectively used for charging the electric car going forward and backward in the same station, the charging loops are respectively formed by connecting the power supply unit in series with the power supply unit and the power supply unit, and the power supply unit is respectively connected with the power supply unit and the power supply unit. In addition, a control unit 16 is arranged in the system to control the charging process of the trolley,
More specifically, the control unit 16 may set a voltage threshold according to the power consumption amount of the electric car traveling to the next charging station, and when the electric car charge reaches the voltage threshold, the power supply unit stops the output of the power supply and controls to disconnect the charging circuit of the electric car to stop the charge; the control unit 16 may set a voltage threshold for stopping charging in the control unit 16 according to the power consumption requirement for the electric vehicle to travel to the next charging station, when the length of the next operation interval is shorter or the electric vehicle energy storage device is mainly on a downhill road, the voltage threshold needs to be set in advance according to the expected energy consumption condition, when the terminal voltage of the electric vehicle energy storage device rises to the set voltage threshold, the control unit 16 sends a charging stopping command signal to the power supply unit, and after the control unit 16 stops outputting, the control unit 16 sends a switching-off command signal to the first contactor 05 or the second contactor 06, the first contactor 05 or the second contactor 06 is disconnected, and the charging circuit is disconnected from the power supply unit.
More specifically, when the electric car continuously enters the charging station in the forward and backward directions, the control unit 16 controls the charging circuit of the electric car to be turned on first and controls the charging circuit of the electric car to be turned off later; and after stopping charging, controlling the charging circuit of the electric car after being connected.
More specifically, the first contactor 05 and the second contactor 06 in the system may be a load switch, a circuit breaker, or SCR, GTO, IGBT, which are power electronic devices and have a load current breaking capability.
More specifically, the control unit 16 in the system may employ a general-purpose industrial device such as a PLC or a computer.
According to a specific embodiment, there is a communication connection between the control units 16 of adjacent charging stations, which can monitor the operating state of the corresponding charging stations with respect to each other; when the control unit 16 of the first charging station monitors the adjacent electric station fault signal, the voltage threshold setting the present charging station will be raised.
Specifically, the first contactor 05 and the second contactor 06 are respectively connected to the control unit 16, and are used for switching on or switching off the charging circuit after receiving the instruction signal of the control unit 16. As shown in fig. 1, each charging circuit is composed of a power supply unit, a contactor and a charging rack through a connecting cable, and the control unit 16 performs intelligent operation and judgment and sends out a signal of a switching-off or switching-on command. According to one specific embodiment, the control units 16 of the plurality of charging stations are all in communication connection with a management platform, which can monitor the working states of the plurality of charging stations in real time; when the management platform monitors the first charging station fault signal, a control signal is sent to the control unit 16 of the adjacent charging station of the first charging station, and the voltage threshold value of the adjacent charging station is dynamically adjusted and set. All control units 16 may be integrated into a management platform, preferably a substation integrated automation System (SCADA), and more preferably may be controlled directly by the management platform without providing the controller alone.
Specifically, the control unit 16 and the management platform can monitor the operation states of the electric car and the charging station, and control the charging voltage threshold of the electric car at different stations according to the travel of each station of the electric car, and the control unit 16 and the management platform can intelligently calculate and judge to send out control signals according to the state signals of each loop to complete the charging of each electric car.
Specifically, the power supply unit comprises an alternating-direct current converter 01, a direct current converter 02 and a charging bus which are sequentially connected in series; the ac-dc converter 01 and the dc converter 02 are connected to the control unit 16, respectively;
More specifically, the ac-dc converter 01 is connected to the commercial power for inputting ac power; and starts or stops power transmission according to the instruction signal of the control unit 16;
more specifically, the dc converter 02 is configured to dynamically output a variable dc voltage according to a terminal voltage of the electric train power receiving system; and dynamically outputs a variable direct current voltage according to the command signal of the control unit 16;
More specifically, the charging bus is provided with a positive electrode 03 and a negative electrode 04 for outputting a variable direct-current voltage to the first and second charging frames, thereby forming a charging circuit.
More specifically, the ac-dc converter 01 and the dc-dc converter 02 are connected to the control unit 16 via a signal transmission device 15, and the signal transmission device 15 is a communication cable or a communication optical cable.
Specifically, the positive electrode end 09 and the negative electrode end 10 of the first charging frame are respectively connected in series with the positive electrode 03 and the negative electrode 04 of the charging bus through the first contactor 05 to form a first charging loop; the positive electrode end 11 and the negative electrode end 12 of the second charging frame are respectively connected with the positive electrode 03 and the negative electrode 04 of the charging bus in series through a second contactor 06 to form a second charging loop.
More specifically, the first contactor 05 and the second contactor 06 are connected to the control unit 16 through a signal transmission device 15, and the signal transmission device 15 is a communication cable or a communication optical cable.
More specifically, the ac-dc converter 01 and the dc converter 02 are both charging units, the ac-dc converter 01 and the dc converter 02 output electric energy with variable voltage and current, regulate the dc power of the power receiving end of the electric car energy storage device according to the voltage of the power receiving end, and simultaneously realize the function of starting and stopping charging according to the command signal sent by the control unit 16. The contactors on each circuit can perform the function of switching on and off the charging circuit by receiving command signals from the control unit 16.
Specifically, a first isolating switch 07 and a second isolating switch 08 are respectively arranged in the first charging loop and the second charging loop, and the first isolating switch 07 and the second isolating switch 08 are both connected with the control unit 16 and are used for receiving an instruction signal of the control unit 16 to realize power supply isolation of the first charging frame and the second charging frame when the system is in an overhaul state. The isolating switch can realize the isolating function of the charging rack, the contactor, the charging unit and the like, and is in an off state when equipment is overhauled.
More specifically, the first disconnecting switch 07 and the second disconnecting switch 08 are connected to the control unit 16 via a signal transmission device 15, the signal transmission device 15 being a communication cable or a communication optical cable.
Specifically, a first position sensor 13 and a second position sensor 14 are further disposed in each of the plurality of charging stations, and the first position sensor 13 and the second position sensor 14 are connected to the control unit 16, and are used for sensing whether a tram enters the charging station to and from the charging station, and transmitting position signals to the control unit 16. The position sensor can judge whether the trolley enters a stop of the going or the returning of the charging station. The first position sensor 13 and the second position sensor 14 are preferably provided on the road of the going or returning station, respectively, and if an electric car enters the station, the sensed position signals are sent to the control unit 16, and the control unit 16 reissues the relevant command signals.
More specifically, the first position sensor 13 and the second position sensor 14 are connected to the control unit 16 by means of a signal transmission device 15, the signal transmission device 15 being a communication cable or a communication optical cable.
According to another embodiment of the present invention, there is provided a method of applying the intelligent control of a standing energy storage electric car charging system as described above, the method comprising:
S1: when the control unit 16 monitors that the tram enters the charging station to or from the station, a switching-on command signal is sent to the corresponding charging loop, and the first contactor 05 or the second contactor 06 is switched on;
S2: after the electric car power receiving system end is electrically connected with the first charging frame or the second charging frame, the control unit 16 sends a power supply command signal to the power supply unit, and the power supply unit dynamically outputs variable direct current voltage according to the voltage of the electric car power receiving system end to charge the electric car;
S3: the control unit 16 sets a voltage threshold according to the power consumption of the electric car traveling to the next charging station, and when the electric car charging reaches the voltage threshold, sends a brake-off command signal to the corresponding charging circuit, and the first contactor 05 or the second contactor 06 is brake-off, and charging is stopped.
Specifically, in step S1, whether the tram is driven into the charging station to/from the station is sensed by the first position sensor 13 and the second position sensor 14, and a position signal is transmitted to the control unit 16. Comprising the following steps:
S11: when the first position sensor 13 or the second position sensor 14 detects that the tram enters the charging station to the charging station and returns to the station, a corresponding position signal is sent to the control unit 16;
S12: the control unit 16 sends a switching-on command signal to the contactor of the charging circuit corresponding to the sensor, and the corresponding contactor switches on.
Specifically, the system performs the following logic strategy in the charging process:
logic 1: when the control unit 16 monitors that the tram enters the charging station to or from the station, the control unit 16 sends a closing instruction signal to a charging loop corresponding to the tram;
Logic 2: when the control unit 16 monitors that the tram continuously enters the charging station to and from the charging station, the control unit 16 firstly sends a first switching-on command signal to a charging loop of the first-entering tram; and after stopping charging when the electric vehicle is driven into, sending a second switching-on command signal to a charging circuit of the electric vehicle.
Specifically, the control unit 16 should ensure that only one contactor is at the closing position at the same time, for example, when the first contactor 05 is closed to charge the energy storage device of the outgoing train, and at this time, the returning train enters the station, and even if the control unit 16 detects the position signal, the first contactor 05 is not closed, the second contactor 06 in the second charging circuit cannot be closed, and the charging of the first charging circuit which needs to wait for the outgoing train is stopped, i.e. after the first contactor 05 is opened in place, the second contactor 06 in the second charging circuit can be closed, and the charging of the returning train is started.
Logic 31: when the control unit 16 of the first charging station monitors the fault signal sent by the adjacent electric station, the voltage threshold value of the charging station is set up;
specifically, the control unit 16 of each charging station may communicate with the adjacent control unit 16, and when the adjacent charging station fails, the charging time of the station may be prolonged, so as to ensure that the energy storage device of the electric vehicle is charged to a full state.
Logic 32: when the management platform monitors the first charging station fault signal, a control signal is sent to the control unit 16 of the adjacent charging station of the first charging station, and the voltage threshold value of the adjacent charging station is dynamically adjusted and set.
In particular, all control methods of the control unit 16 may be integrated into a substation integrated automation System (SCADA), more particularly the controller may not be provided separately, but the control methods still apply.
The intelligent control station type energy storage trolley charging system and method provided by the invention can be applied to occasions needing to charge more than two trolleys in a parking lot or a vehicle section of the energy storage trolley by time sharing, and the trolleys are charged sequentially by adopting the logic 1, logic 2, logic 31 and logic 32 control strategies.
Another embodiment of the invention provides a computer readable medium storing a computer program for execution by an electronic device, which when run on the electronic device causes the electronic device to perform the above-described defect image sample generating method.
It should be understood that any process or method description in the methods, flowcharts, or otherwise described herein may be understood to represent modules, segments, or portions of code including one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending upon the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
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