CN112297931A - Intelligent control platform type energy storage trolley charging system and method - Google Patents
Intelligent control platform type energy storage trolley charging system and method Download PDFInfo
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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
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- 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
The invention relates to an intelligently controlled platform type energy storage trolley bus charging system which comprises a plurality of charging stations, wherein a power supply unit, a first charging frame, a second charging frame and a control unit are arranged in each charging station; 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 return platform of the charging station and can be electrically connected with a power receiving system of the electric car so as to charge the electric car running into the forward platform and the return platform; the control unit is used for monitoring whether the electric vehicle drives into the charging station or not in real time and controlling to switch on or switch off the corresponding charging loop. The system not only reduces the number of the charging units and the size of the box-type substation, but also can realize accurate control, save engineering investment and improve operation efficiency, and is more favorable for engineering implementation.
Description
Technical Field
The invention belongs to the technical field of charging and battery replacing of energy storage electric vehicles, and particularly relates to an intelligent control platform type energy storage electric vehicle charging system and method.
Background
In the electric car/tramcar engineering adopting the energy storage technologies such as the super capacitor, the hybrid battery and the like, a charging station is arranged at a station, when a vehicle drives into the station to get on or off passengers, the charging station charges a vehicle-mounted energy storage capacitor, a battery or other energy storage components to supplement electric energy, so that after the vehicle drives out of the station, the energy storage components release the electric energy to provide traction power for the vehicle and power for equipment such as lighting in the vehicle and an air conditioner. Different vehicles need to provide different charging voltages because the terminal voltages of the vehicle-mounted energy storage components are different at the same time. In the prior art, charging units with corresponding number are generally arranged according to the number of vehicles which may stop, for example, two charging units are arranged to charge two vehicles which may go up and down in a station. However, the number of equipment is increased by arranging two sets of charging units, the scale of the transformer substation is enlarged, and particularly when a box-type transformer substation is adopted, the box-type transformer substation is large in size and difficult in site selection on two sides of an urban road, and the difficulty in engineering implementation is increased; meanwhile, the probability of the simultaneous arrival of the outgoing vehicles and the return vehicles is low, and the utilization rate of equipment is also low.
Therefore, there are several key problems with the prior art: 1. the number of the charging units is large; 2. the charging requirements of the forward and return electric vehicles cannot be met, and potential safety hazards caused by simultaneous charging are avoided; 3. the existing control system cannot carry out intelligent judgment, so that the charging strategy is optimized, and the operation efficiency is improved.
Disclosure of Invention
In view of the above, the present invention provides an intelligent control station type energy storage electric car charging system and method, the system only adopts one set of power supply unit, namely a charging set, adopts an intelligent control method, meets the charging requirement under a large probability condition, avoids charging two electric cars simultaneously, also combines the energy consumption condition of the next operation interval of the electric cars, intelligently adjusts the charging time, and meanwhile, can also be provided with a controller to realize intelligent automatic control, can also realize accurate control besides reducing the number of the charging sets and the volume of a box-type substation, saves engineering investment and improves operation efficiency, and is more beneficial to engineering implementation.
In order to achieve the above object, a first aspect of the present invention provides an intelligent control platform type energy storage trolley bus charging system, which includes a plurality of charging stations, each of which has a power supply unit, a first charging rack, a second charging rack and a control unit;
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 return platform of the charging station and can be electrically connected with a power receiving system of the electric car, so that the electric car running into the forward platform and the return platform is charged; the control unit is used for monitoring whether the electric vehicle drives into the charging station or not in real time and controlling to switch on or switch off the corresponding charging loop;
the control unit 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 reaches the voltage threshold, the control unit controls the power supply unit to stop the output of the power supply and disconnect a charging loop of the electric car to stop charging;
when the charging station continuously drives into the electric car in the forward and backward stations, the control unit firstly controls to switch on the charging loop of the first-driving-into electric car and controls to switch off the charging loop of the second-driving-into electric car; and controlling a charging loop of the first-driving electric car after the first-driving electric car is connected until the charging is stopped.
Furthermore, communication connection exists between the control units of the adjacent charging stations, and the working states of the corresponding charging stations can be mutually monitored;
when the control unit of the first charging station monitors a fault signal of an adjacent electric station, the voltage threshold of the charging station is set to be increased.
Furthermore, the control units of the plurality of charging stations are in communication connection with a management platform, and the management platform can monitor the working states of the plurality of charging stations in real time;
when monitoring a fault signal of a first charging station, the management platform sends a control signal to a control unit of an adjacent charging station of the first charging station, and dynamically adjusts and sets a voltage threshold value of the adjacent charging station.
Furthermore, the first contactor and the second contactor are respectively connected with the control unit and are used for switching on or switching off the charging loop after receiving the instruction signal of the control unit;
the first contactor and the second contactor are load switches and circuit breakers, or one of SCR, GTO and IGBT power electronic devices.
Furthermore, the power supply unit comprises an alternating current-direct current converter, a direct current converter and a charging bus which are connected in series in sequence; the alternating current-direct current converter and the direct current converter are respectively connected with the control unit;
the alternating current-direct current converter is connected with commercial power and is used for inputting alternating current; and starting or stopping power transmission 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 voltage at the terminal of the electric vehicle power receiving system; and dynamically outputting variable direct current voltage according to the control unit instruction signal;
the charging bus is provided with a positive electrode and a negative electrode and is used for outputting the variable direct current voltage to the first charging frame and the second charging frame so as to form a charging loop.
Further, the positive electrode end and the negative electrode end of the first charging rack are respectively connected with the positive electrode and the negative electrode of the charging bus in series through the first contactor to form a first charging loop; and the positive end and the negative end of the second charging frame are respectively connected with the positive electrode and the negative electrode of the charging bus in series through the second contactor to form a second charging loop.
Furthermore, 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 used for receiving an instruction signal of the control unit to realize power supply isolation of the first charging frame and the second charging frame when the system is in a maintenance state.
Furthermore, 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 used for sensing whether the electric vehicle drives into the station of the charging stations or not and transmitting position signals to the control unit.
A second aspect of the present invention provides a method of applying the intelligently controlled station-based energy storage trolley charging system as described above, the method comprising:
when the control unit monitors that the tramcar drives into the station where the tramcar moves to or returns to the charging station, a closing instruction signal is sent to a corresponding charging loop, and the first contactor or the second contactor is closed;
after the electric vehicle power receiving system end is electrically connected with the first charging frame or the second charging frame, the control unit sends a power supply instruction signal to the power supply unit, and the power supply unit dynamically outputs variable direct-current voltage according to the electric vehicle power receiving system end voltage to charge the electric vehicle;
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 reaches the voltage threshold after charging, a charging stop instruction signal is sent to the power supply unit, after the power supply unit stops outputting, the control unit sends a brake-off instruction signal to a corresponding charging loop, and the first contactor or the second contactor performs brake-off;
when the control unit monitors that the tramcar continuously drives into the station of the charging station, the control unit firstly sends a first closing instruction signal to a charging loop of the tramcar which drives into the charging station firstly; and sending a second closing instruction signal to a charging loop of the later-driving electric car until the first-driving electric car stops charging.
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 of the charging station is set to be increased; or,
when the management platform monitors a fault signal of a first charging station, the management platform sends a control signal to a control unit of an adjacent charging station of the first charging station, and dynamically adjusts and sets a voltage threshold value of the adjacent charging station.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
the invention provides an intelligently controlled platform type energy storage trolley car charging system and a method. In addition, an intelligent control method is adopted, the charging requirement under the condition of a large probability is met, two vehicles are prevented from being charged simultaneously, meanwhile, the energy consumption condition of the next operation interval is combined, the charging time is intelligently adjusted, meanwhile, the intelligent automatic control can be realized through a controller which can be arranged, the number of charging units can be reduced, the size of a 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 structural diagram of an intelligently controlled station-type energy storage trolley-bus charging system implemented according to the present invention;
in the figure: 01-AC-DC converter, 02-DC converter, 03-positive pole of charging bus, 04-negative pole of charging bus, 05-first contactor, 06-second contactor, 07-first isolating switch, 08-second isolating switch, 09-positive pole end of first charging rack, 10-negative pole end of first charging rack, 11-positive pole end of second charging rack, 12-negative pole end of second charging rack, 13-first position sensor, 14-second position sensor, 15-signal transmission device, 16-control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that the term "first \ second" referred to in the present invention is only used for distinguishing similar objects, and does not represent a specific ordering for the objects, and it should be understood that "first \ second" may be interchanged in a specific order or sequence, if allowed. It should be understood that "first \ second" distinct objects may be interchanged under appropriate circumstances such that embodiments of the invention described herein may be practiced in sequences other than those described or illustrated herein.
According to an embodiment of the present invention, as shown in fig. 1, an intelligent control platform type energy storage trolley bus charging system is provided, which includes a plurality of charging stations, each of which has a power supply unit, a first charging rack, a second charging rack and a control unit 16;
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 frame is respectively arranged in the forward platform and the return platform of the charging station and can be electrically connected with a power receiving system of the electric car so as to charge the electric car running into the forward platform and the return platform; the control unit 16 is used for monitoring whether the electric vehicle drives into the charging station in real time and controlling to switch on or switch off the corresponding charging loop.
Specifically, in the intelligent control station-type energy storage electric car charging system provided in this embodiment, the power supply unit is preferably a set of charging unit that converts commercial power into a variable dc voltage, and two charging loops are connected at the same time to charge the electric car going to and returning to the same station, respectively, and the charging loop is formed by connecting the power supply unit in series with a going electric car charging rack and a returning electric car charging rack, respectively, and the going electric car charging rack and the returning electric car charging rack can be electrically connected to a power receiving system of the electric car to realize charging, and the power receiving system of the electric car is a charging contact device of the electric car. In addition, a control unit 16 is arranged in the system for controlling the charging process of the electric car,
more specifically, the control unit 16 may set a voltage threshold value according to the amount of power consumption of the electric train traveling to the next charging station, and when the electric train is charged to reach the voltage threshold value, the power supply unit stops the output of the power supply and controls to disconnect the charging loop of the electric train to suspend charging; the control unit 16 can set a voltage threshold for stopping charging in the control unit 16 when the energy storage device of the electric car is not fully charged when the length of the next operating interval is short or mainly in a downhill road section according to the power consumption requirement of the electric car running to the next charging station, the voltage threshold needs to be set in advance according to the expected energy consumption situation, when the terminal voltage of the energy storage device of the electric car rises to the set voltage threshold, the control unit 16 sends a charging stop command signal to the power supply unit, when the control unit 16 stops outputting, the control unit 16 sends a brake separating 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 loop is disconnected from the power supply unit, so that the strategy can avoid unnecessary charging time and improve the operating efficiency.
More specifically, when the charging station continuously drives into the electric car in the forward and backward stations, the control unit 16 first controls to turn on the charging circuit of the first-driving electric car, and controls to turn off the charging circuit of the second-driving electric car; and controlling a charging loop of the tram after the charging is stopped until the tram is driven into the tram first.
More specifically, the first contactor 05 and the second contactor 06 in the system can adopt a load switch, a breaker or power electronic devices such as SCR, GTO, IGBT and the like, and have a switch capable of cutting off load current.
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, the control units 16 of adjacent charging stations are communicatively connected to each other, so as to monitor the operating states of the corresponding charging stations with respect to each other; when the control unit 16 of the first charging station detects a fault signal of an adjacent electric station, the voltage threshold value of the charging station is set to be increased.
Specifically, the first contactor 05 and the second contactor 06 are respectively connected to the control unit 16, and are configured to receive a command signal from the control unit 16 and then turn on or off the charging circuit. As shown in fig. 1, each charging loop is composed of a power supply unit, a contactor, and a charging rack via a connection cable, and the control unit 16 performs intelligent operation and judgment to send a signal of an opening or closing command. According to a specific embodiment, the control units 16 of the plurality of charging stations are all in communication connection with a management platform, and the management platform can monitor the working states of the plurality of charging stations in real time; when the management platform monitors a fault signal of the first charging station, it will send a control signal to the control unit 16 of the adjacent charging station of the first charging station, and dynamically adjust and set the voltage threshold of the adjacent charging station. All control units 16 may be integrated into a management platform, preferably a substation integrated automation System (SCADA), which preferably may not be provided separately, but directly controlled by the management platform.
Specifically, the control unit 16 and the management platform can monitor the operating states of the electric car and the charging station, and control the charging voltage threshold of the electric car at different stations according to each station travel of the electric car, and both the control unit 16 and the management platform can perform intelligent operation and judge to send out a control signal according to the state signal received from each loop to complete the charging of each electric car.
Specifically, the power supply unit comprises an alternating current-direct current converter 01, a direct current converter 02 and a charging bus which are connected in series in sequence; 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 mains for inputting ac power; and starts or stops power transmission according to an instruction signal of the control unit 16;
more specifically, the dc converter 02 is configured to dynamically output a variable dc voltage from a terminal voltage of the power receiving system of the electric train; and dynamically outputs a variable direct current voltage according to the command signal of the control unit 16;
more specifically, the charging bus bar 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 racks, thereby forming a charging loop.
More specifically, the ac-dc converter 01 and the dc-dc converter 02 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.
Specifically, a positive terminal 09 and a negative terminal 10 of the first charging rack are respectively connected in series with a positive pole 03 and a negative pole 04 of the charging bus through a first contactor 05 to form a first charging loop; the positive terminal 11 and the negative terminal 12 of the second charging rack are respectively connected in series with the positive pole 03 and the negative pole 04 of the charging bus through the 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, and output dc power with corresponding voltage according to the voltage regulation of the receiving end of the energy storage device of the electric car, and simultaneously, the function of starting and stopping charging can be realized according to the command signal sent by the control unit 16. And the contactor on each circuit can realize the functions of connecting and disconnecting the charging circuit, and the contactor can connect or disconnect the charging circuit by receiving the command signal of 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 used for receiving an instruction signal of the control unit 16 to realize power supply isolation of the first charging rack and the second charging rack when the system is in a maintenance state. The isolating switch can realize the isolating function of the charging frame and the contactor, the charging unit and the like, and is in a disconnection state when equipment maintenance is carried out.
More specifically, the first isolation switch 07 and the second isolation switch 08 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.
Specifically, a first position sensor 13 and a second position sensor 14 are further disposed in each of the plurality of charging stations, and each of the first position sensor 13 and the second position sensor 14 is connected to the control unit 16, and is configured to sense whether the tramcar drives into a station of the charging station or not, and transmit a position signal to the control unit 16. The position sensor can judge whether the trolley enters a station of the going or returning journey of the charging station. Preferably, the first position sensor 13 and the second position sensor 14 are respectively installed on a traveling lane of an outbound or inbound platform, and if a tram enters the platform, the sensed position signals are transmitted to the control unit 16, and the control unit 16 distributes relevant command signals.
More specifically, the first position sensor 13 and the second position sensor 14 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.
According to another embodiment of the present invention, there is provided a method of applying the intelligent-controlled station-type energy storage trolley charging system as described above, the method including:
s1: when the control unit 16 monitors that the tramcar drives into the station of the charging station, the control unit sends a closing instruction signal to a corresponding charging loop, and the first contactor 05 or the second contactor 06 is closed;
s2: after the electric car receiving system end is electrically connected with the first charging frame or the second charging frame, the control unit 16 sends a power supply instruction signal to the power supply unit, and the power supply unit dynamically outputs variable direct-current voltage according to the electric car receiving system end voltage to charge the electric car;
s3: the control unit 16 sets a voltage threshold according to the power consumption of the electric car running to the next charging station, and when the electric car reaches the voltage threshold during charging, the control unit sends a brake-off command signal to the corresponding charging loop, and the first contactor 05 or the second contactor 06 is switched off, so that the charging is stopped.
Specifically, in step S1, whether or not the electric train is driven into the station for the forward and backward movement of the charging 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. The method comprises the following steps:
s11: when the first position sensor 13 or the second position sensor 14 detects that the tramcar drives into the station of the charging station, the corresponding position signal is sent to the control unit 16;
s12: the control unit 16 sends a closing instruction signal to the contactor of the charging circuit corresponding to the sensor, and the corresponding contactor is closed.
Specifically, the system executes the following logic strategy in the charging process:
logic 1: when the control unit 16 monitors that the tramcar drives into the station of the charging station, the control unit 16 firstly sends a closing instruction signal to the charging loop corresponding to the tramcar;
logic 2: when the control unit 16 monitors that the tramcar continuously drives into the station of the charging station, the control unit 16 firstly sends a first closing instruction signal to a charging loop of the tramcar which drives into the charging station firstly; and sending a second closing instruction signal to a charging loop of the later-driven electric car until the first-driven electric car stops charging.
Specifically, the control unit 16 should ensure that only one contactor is at the closing position at the same time, if the first contactor 05 is closing and charging the energy storage device of the outbound electric vehicle, at this time, there is just a return electric vehicle entering the station, even if the control unit 16 detects a position signal, but the first contactor 05 is not closing, the second contactor 06 in the second charging loop cannot be closing, the first charging loop that needs to wait for the return is stopped charging, that is, after the first contactor 05 is in place, the second contactor 06 in the return second charging loop can be closing, and the return electric vehicle is started to charge.
Logic 31: when the control unit 16 of the first charging station monitors a fault signal sent by an adjacent electric station, the voltage threshold of the charging station is set to be increased;
specifically, the control unit 16 of each charging station can communicate with the adjacent control unit 16, and when the adjacent charging station fails, the charging time of the station can be prolonged, and the energy storage device of the electric car is charged to a full-charge state.
Logic 32: when the management platform monitors a fault signal of the first charging station, it will send a control signal to the control unit 16 of the adjacent charging station of the first charging station, and dynamically adjust and set the voltage threshold of the adjacent charging station.
In particular, all control methods of the control unit 16 may be integrated into a substation integrated automation System (SCADA), and more particularly, the controller may not be separately provided, but the control methods still apply.
The intelligent control platform type energy storage trolley car charging system and method provided by the invention can be applied to occasions where more than two trolley cars need to be charged in time-sharing mode in a parking lot or a vehicle section of the energy storage trolley car, and the trolley cars are sequentially charged by adopting the logic 1, logic 2, logic 31 and logic 32 control strategies.
Another embodiment of the present 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 execute the above-mentioned defect image sample generation method.
It should be understood that any process or method descriptions of methods, flow diagrams, or otherwise described herein, may be understood as representing modules, segments, or portions of code which include 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, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An intelligent control platform type energy storage trolley bus charging system is characterized by comprising 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 each charging station;
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) to form a charging loop;
the first charging frame and the second charging frame are respectively arranged in the forward platform and the return platform of the charging station and can be electrically connected with a power receiving system of the electric car, so that the electric car running into the forward platform and the return platform is charged; the control unit (16) is used for monitoring whether the tramcar drives into the charging station or not in real time and controlling to switch on or off the corresponding charging loop;
wherein the control unit (16) is capable of setting a voltage threshold value according to the power consumption of the electric car when the electric car travels to the next charging station, and when the electric car reaches the voltage threshold value, 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 is continuously driven into the forward and backward stations of the charging station, the control unit (16) firstly controls to switch on the charging loop of the electric car which is driven into firstly, and controls to switch off the charging loop of the electric car which is driven into secondly; and controlling a charging loop of the first-driving electric car after the first-driving electric car is connected until the charging is stopped.
2. An intelligently controlled station-type energy storage trolley charging system according to claim 1, characterized in that there is a communication link between the control units (16) of adjacent charging stations, which can mutually monitor the operating state of the corresponding charging stations;
wherein the voltage threshold value of the charging station is set to be increased when the control unit (16) of the first charging station monitors a fault signal of an adjacent electrical station.
3. The system according to claim 1, characterized in that the control units (16) of the charging stations are all connected to a management platform, which can monitor the operating status of the charging stations in real time;
when monitoring a fault signal of a first charging station, the management platform sends a control signal to a control unit (16) of an adjacent charging station of the first charging station, and dynamically adjusts and sets a voltage threshold value of the adjacent charging station.
4. The intelligent control platform type energy storage trolley charging system according to claim 1, wherein the first contactor (05) and the second contactor (06) are respectively connected with the control unit (16) and used for receiving a command signal of the control unit (16) and then switching on or off a charging loop;
the first contactor (05) and the second contactor (06) are load switches, circuit breakers or one of SCR, GTO and IGBT power electronic devices.
5. The intelligently controlled station-type energy storage trolley charging system according to claim 1, characterized in that the power supply unit comprises an ac-dc converter (01), a dc converter (02) and a charging bus connected in series in sequence; the alternating current-direct current converter (01) and the direct current converter (02) are respectively connected with the control unit (16);
the alternating-direct current converter (01) is connected with a mains supply and is used for inputting alternating current; and starts or stops power transmission according to the command signal of the control unit (16);
the direct current converter (02) is used for dynamically outputting variable direct current voltage according to the voltage at the terminal of the electric system of the electric car; and dynamically outputs a variable direct current voltage according to the command signal of the control unit (16);
the charging bus is provided with a positive electrode (03) and a negative electrode (04) and is used for outputting the variable direct-current voltage to the first charging frame and the second charging frame so as to form a charging loop.
6. The system according to claim 5, wherein the positive terminal (09) and the negative terminal (10) of the first charging rack are respectively connected in series with the positive terminal (03) and the negative terminal (04) of the charging bus via a first contactor (05) to form a first charging loop; and the positive end (11) and the negative end (12) of the second charging rack 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.
7. The intelligent control station type energy storage trolley charging system according to claim 6, wherein 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 (05) and the second isolating switch (06) are both connected with the control unit (16) and used for receiving a command signal of the control unit (16) to realize power supply isolation of the first charging rack and the second charging rack when the system is in a maintenance state.
8. The intelligent-control platform-type energy storage trolley charging system according to claim 1, wherein a first position sensor (13) and a second position sensor (14) are arranged 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 used for sensing whether a trolley enters the station for going to or returning to the charging station and transmitting position signals to the control unit (16).
9. A method of applying the intelligently controlled station-based energy storage trolley charging system according to any one of claims 1 to 8, the method comprising:
when the control unit (16) monitors that the tramcar drives into the station of the charging station, a closing instruction signal is sent to a corresponding charging loop, and the first contactor (05) or the second contactor (06) is closed;
after the electric vehicle 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 instruction signal to the power supply unit, and the power supply unit dynamically outputs variable direct-current voltage according to the voltage of the electric vehicle power receiving system end to charge the electric vehicle;
the control unit (16) sets a voltage threshold according to the power consumption of the electric car running to the next charging station, when the electric car reaches the voltage threshold during charging, a charging stop instruction signal is sent to the power supply unit, after the power supply unit stops outputting, the control unit (16) sends a brake-off instruction signal to a corresponding charging loop, and the first contactor (05) or the second contactor (06) performs brake-off;
when the control unit (16) monitors that the tramcar continuously drives into the station of the charging station, the control unit (16) firstly sends a first closing instruction signal to a charging loop of the tramcar which drives into the charging station firstly; and sending a second closing instruction signal to a charging loop of the later-driving electric car until the first-driving electric car stops charging.
10. The method of intelligently controlled station-top energy storage trolley charging system of claim 9, further comprising:
when the control unit (16) of the first charging station monitors a fault signal sent by an adjacent electric station, the voltage threshold of the charging station is set to be increased; or,
when the management platform monitors a fault signal of a first charging station, the management platform sends a control signal to a control unit (16) of an adjacent charging station of the first charging station, and the voltage threshold value of the adjacent charging station is dynamically adjusted and set.
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