CN115632493B - Multi-load power supply CPT system based on relay polar plate - Google Patents
Multi-load power supply CPT system based on relay polar plate Download PDFInfo
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- CN115632493B CN115632493B CN202211645327.5A CN202211645327A CN115632493B CN 115632493 B CN115632493 B CN 115632493B CN 202211645327 A CN202211645327 A CN 202211645327A CN 115632493 B CN115632493 B CN 115632493B
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- electric energy
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/01—Resonant DC/DC converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
Abstract
The invention discloses a multi-load power supply CPT system based on a relay polar plate, belonging to the technical field of CPT systems and comprising a vehicle head transmitting end, a ground relay end and a plurality of carriage receiving ends; the head transmitting end is used for transmitting alternating current electric energy; the ground relay terminal is used for receiving the alternating current electric energy of the locomotive transmitting terminal and transmitting the alternating current electric energy to the carriage receiving terminal; the receiving end of the carriage is used for receiving alternating current electric energy and converting the alternating current electric energy into direct current electric energy matched with the load. The invention provides a multi-load CPT system based on a relay polar plate, which can realize the synchronous transmission of the electric energy of a train head to each subsequent passive carriage in a wireless mode, and further provides stable and reliable electric energy for on-line monitoring equipment in the passive carriages.
Description
Technical Field
The invention belongs to the technical field of CPT systems, and particularly relates to a multi-load power supply CPT system based on a relay polar plate.
Background
In order to ensure the safe operation of the freight train of the long-reach main railway, the on-line monitoring equipment is required to be arranged in the passive carriage to monitor the vibration condition, the temperature, the air pressure and other parameters of the passive carriage in real time, and the continuous and stable power supply is an important premise for the normal work of the on-line monitoring equipment in the carriage.
The electric energy of the train head is transmitted to each passive carriage in a wireless mode by applying a multi-load CPT technology, and continuous and stable electric energy can be provided for the on-line monitoring equipment in the passive carriages. The capacitive wireless power transmission technology is a non-contact power supply mode using an alternating electric field as a transmission medium. The existing multi-load CPT system is mainly classified into a cascade multi-load CPT system and a parallel multi-load CPT system. In the cascaded multi-load CPT system, a plurality of relay units are included, and each relay unit not only needs to pick up electric energy to supply power to a load connected with the relay unit, but also needs to transmit the electric energy to a subsequent relay unit. Because the electric energy needs to be transmitted backwards step by step through a plurality of relay units, the system loss is high, and when a certain relay unit breaks down, continuous electric energy cannot be obtained by subsequent loads. In the parallel multi-load CPT system, a plurality of receiving terminals obtain electric energy from a single transmitting terminal at the same time, so that the transmitting terminal needs to arrange transmitting plates with the same number as the receiving plates or transmitting plates with a sufficiently large area.
Disclosure of Invention
In order to solve the problems, the invention provides a multi-load power supply CPT system based on a relay polar plate.
The technical scheme of the invention is as follows: a multi-load power supply CPT system based on a relay polar plate comprises a vehicle head transmitting end, a ground relay end and a plurality of carriage receiving ends;
the head transmitting end is used for transmitting alternating current electric energy;
the ground relay terminal is used for receiving the alternating current electric energy of the locomotive transmitting terminal and transmitting the alternating current electric energy to the carriage receiving terminal;
the receiving end of the carriage is used for receiving alternating current electric energy and converting the alternating current electric energy into direct current electric energy matched with the load.
Furthermore, the head transmitting end comprises a transmitting polar plate, a first compensation network, an inverter and a direct-current power supply which are connected in sequence;
the transmitting polar plate is arranged at the bottom of the vehicle head through an insulating medium;
the direct current power supply and the inverter are used for generating alternating current electric energy; the first compensation network is used for keeping the voltage of the relay polar plate of the ground relay terminal and the voltage of the rail constant; the transmitting polar plate is used for transmitting the alternating current electric energy to the ground relay terminal.
Further, the ground relay terminal comprises a relay polar plate and a third compensation network;
the relay polar plate is arranged between the ground and the rail through an insulating medium; the relay polar plate is used for receiving the alternating current electric energy of the locomotive transmitting end and transmitting the alternating current electric energy to the carriage receiving end; the third compensation network is used to keep the multi-load powered CPT system in a resonant state.
Furthermore, the receiving end of the carriage comprises a receiving pole plate, a second compensation network, a rectifier and a load which are connected in sequence;
the receiving polar plate is arranged at the bottom of the headstock through an insulating medium;
the receiving polar plate is used for receiving alternating current electric energy; the second compensation network is used for ensuring that the alternating current output voltage of the multi-load power supply CPT system is constant and the voltage of the input end of the rectifier is constant; the rectifier is used for converting alternating current electric energy into direct current electric energy.
Further, the DC power supply includes a power supplyU 0 (ii) a Power supplyU 0 Are connected to the inverter.
Further, the first compensation network comprises an inductanceL P And a capacitorC P (ii) a Coupling capacitor is adopted between transmitting polar plate and relay polar plateC P1 ；
InductanceL P And a coupling capacitorC P1 In series, and a capacitor connected in parallel to the connection pointC P 。
Further, the third compensation network comprises an inductanceL s (ii) a The coupling capacitor is adopted between the relay polar plate and the railC s ；
InductanceL s And a coupling capacitorC s And (4) connecting in parallel.
Further, the second compensation network comprises an inductanceL 1 And a capacitorC 1 (ii) a Coupling capacitor is adopted between the receiving polar plate and the relay polar plateC r1 ；
InductanceL 1 And a coupling capacitorC r1 In series, and a capacitor connected in parallel to the connection pointC 1 。
The invention has the beneficial effects that:
(1) The invention provides a multi-load CPT system based on a relay polar plate, which can realize the synchronous transmission of the electric energy of a train head to each subsequent passive carriage in a wireless mode, thereby providing stable and reliable electric energy for on-line monitoring equipment in the passive carriages; compared with a parallel multi-load CPT system, the system only adopts one relay polar plate and one transmitting polar plate, the number of the transmitting polar plates is reduced, and a power bus is not required to be arranged on the ground;
(2) Each receiving end of the multi-load CPT system based on the relay polar plate is in a parallel connection relation on a circuit, so that compared with a cascade multi-load CPT system, the problems of power supply interruption and the like caused by the fault of a certain relay unit are avoided, and each load of the system has better output independence;
(3) The transmitting end and the receiving end of the multi-load CPT system based on the relay polar plates both adopt LC type compensation topologies, the compensation topologies among the relay polar plates adopt large inductors to realize resonance of the whole system, and independent constant voltage output can be realized among all loads of the system.
Drawings
Fig. 1 is a block diagram of a multi-load powered CPT system;
fig. 2 is a topology structure diagram of a multi-load power supply CPT system;
FIG. 3 is a schematic diagram of an LCC compensation topology;
FIG. 4 is a CLC compensation topology block diagram;
FIG. 5 is a graph of inverter output side voltage waveforms;
FIG. 6 is a diagram of the inverter output side current waveform;
fig. 7 is a diagram showing an output voltage waveform of the vehicle-mounted side load 1;
fig. 8 is a graph of an output voltage waveform of the vehicle-mounted end load 2;
fig. 9 is a diagram of an output voltage waveform of the vehicle-mounted-end load 3;
fig. 10 is a graph of an output voltage waveform of the vehicle-mounted load 4.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a multi-load power supply CPT system based on a relay plate, which includes a vehicle head transmitting terminal, a ground relay terminal and a plurality of vehicle compartment receiving terminals;
the head transmitting end is used for transmitting alternating current electric energy;
the ground relay terminal is used for receiving the alternating current electric energy of the locomotive transmitting terminal and transmitting the alternating current electric energy to the carriage receiving terminal;
the receiving end of the carriage is used for receiving alternating current electric energy and converting the alternating current electric energy into direct current electric energy matched with the load.
In the embodiment of the invention, as shown in fig. 1, the head transmitting end comprises a transmitting pole plate, a first compensation network, an inverter and a direct-current power supply which are connected in sequence;
the transmitting polar plate is arranged at the bottom of the vehicle head through an insulating medium;
the direct current power supply and the inverter are used for generating alternating current electric energy; the first compensation network is used for keeping the voltage of the relay polar plate of the ground relay end and the voltage of the rail constant; the transmitting polar plate is used for transmitting the alternating current electric energy to the ground relay terminal.
In the embodiment of the present invention, as shown in fig. 1, the ground relay terminal includes a relay pad and a third compensation network;
the relay polar plate is arranged between the ground and the rail through an insulating medium; the relay polar plate is used for receiving the alternating current electric energy of the locomotive transmitting end and transmitting the alternating current electric energy to the carriage receiving end; the third compensation network is used to keep the multi-load powered CPT system in a resonant state.
In the embodiment of the present invention, as shown in fig. 1, the receiving end of the car includes a receiving pole plate, a second compensation network, a rectifier and a load, which are connected in sequence;
the receiving polar plate is arranged at the bottom of the headstock through an insulating medium;
the receiving polar plate is used for receiving alternating current electric energy; the second compensation network is used for ensuring that the alternating current output voltage of the multi-load power supply CPT system is constant and the voltage of the input end of the rectifier is constant; the rectifier is used for converting alternating current electric energy into direct current electric energy.
In an embodiment of the present invention, as shown in fig. 2, the dc power supply includes a power supplyU 0 (ii) a Power supplyU 0 Are connected to the inverter.
In the practice of the inventionIn an example, as shown in FIG. 2, the first compensation network includes an inductorL P And a capacitorC P (ii) a Coupling capacitor is adopted between transmitting polar plate and relay polar plateC P1 ；
InductanceL P And a coupling capacitorC P1 In series, and a capacitor is connected in parallel to the connection pointC P 。
In an embodiment of the present invention, as shown in fig. 2, the third compensation network comprises an inductorL s (ii) a The coupling capacitor is adopted between the relay polar plate and the railC s ；
InductanceL s And a coupling capacitorC s And (4) connecting in parallel.
In an embodiment of the invention, as shown in fig. 2, the second compensation network comprises an inductanceL 1 And a capacitorC 1 (ii) a Coupling capacitor is adopted between the receiving polar plate and the relay polar plateC r1 ；
InductanceL 1 And a coupling capacitorC r1 In series, and a capacitor connected in parallel to the connection pointC 1 。
The equivalent coupling model of the multi-load CPT system based on the relay polar plates is shown in figure 2, the constant voltage output of each load is realized by respectively arranging compensation topological structures at a transmitting end and a receiving end, and finally, the resonance of the whole system is realized by adding corresponding compensation topologies between the relay polar plates. Because each load is completely symmetrical, a single load is selected for analysis.
There are two kinds of topologies for realizing constant voltage output, which are LCC and CLC compensation topologies, and the structures of these two topologies and the conditions for realizing constant voltage output are given below.
LCC compensation topology as shown in FIG. 3 when input voltageU in When constant, realize the output voltage at the two ends of the load ZU out The constant conditions were:
system output voltageU out And an input voltageU in The ratio of (A) to (B) is as follows:
CLC Compensation topology as shown in FIG. 4, when input voltageU in When constant, realize the output voltage at the two ends of the load ZU out The conditions for constant voltage output are:
system output voltageU out And an input voltageU in The ratio of (A) to (B) is as follows:
the transmitting terminal and the receiving terminal both adopt LC type compensation topology, and the compensation topology between the relay polar plates adopts large inductanceL s To achieve resonance of the entire system. Since each load is completely symmetrical, a single load is selected for analysis, whereinU 0 Is a direct-current power supply and is provided with a DC power supply,L P is the compensation inductance of the transmitting end,C P is a compensation capacitance of the transmitting end,C P1 is the coupling capacitance between the transmitting plate and the relay plate,C r1 is the coupling capacitance between the receive plate and the relay plate,C s is the coupling capacitance between the relay plate and ground,C 1 is the compensation capacitance at the receiving end and,L 1 is the compensation inductance of the receiving terminal.
Is composed of
Can obtain the output voltage of the transmitting terminalU s And receiving end AC output voltageU out Are all constant voltages:
therefore, it is not only easy to useU out And withU in The ratio between:
in order to resonate the whole system, the inductance L s The following requirements should be satisfied:
the invention is described below with reference to specific experimental waveforms.
The inverter output voltage waveform of the system transmitting end obtained through MATLAB/Simulink simulation is shown in fig. 5, the inverter output current waveform of the system transmitting end obtained through MATLAB/Simulink simulation is shown in fig. 6, and the whole system basically presents a resonance state under the combined action of the transmitting and receiving end compensation network and the middle large inductor.
The output voltage waveform of the system vehicle-mounted end load 1 obtained through MATLAB/Simulink simulation is shown in fig. 7, the output voltage waveform of the system vehicle-mounted end load 2 obtained through MATLAB/Simulink simulation is shown in fig. 8, the output voltage waveform of the system vehicle-mounted end load 3 obtained through MATLAB/Simulink simulation is shown in fig. 9, and the output voltage waveform of the system vehicle-mounted end load 4 obtained through MATLAB/Simulink simulation is shown in fig. 10.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto and changes may be made without departing from the scope of the invention in its aspects.
Claims (6)
1. A multi-load power supply CPT system based on a relay polar plate is characterized by comprising a vehicle head transmitting end, a ground relay end and a plurality of carriage receiving ends;
the head transmitting end is used for transmitting alternating current electric energy;
the ground relay terminal is used for receiving the alternating current electric energy of the locomotive transmitting terminal and transmitting the alternating current electric energy to the carriage receiving terminal;
the carriage receiving end is used for receiving alternating current electric energy and converting the alternating current electric energy into direct current electric energy matched with a load;
the ground relay terminal comprises a relay polar plate and a third compensation network;
the relay polar plate is arranged between the ground and the rail through an insulating medium; the relay polar plate is used for receiving alternating current electric energy at the head transmitting end and transmitting the alternating current electric energy to the carriage receiving end; the third compensation network is used for keeping the multi-load power supply CPT system in a resonance state;
the third compensation network comprises an inductorL s (ii) a The relay polar plate and the rail adopt a coupling capacitorC s ；
The inductorL s And a coupling capacitorC s And (4) connecting in parallel.
2. The multi-load power supply CPT system based on the relay polar plate is characterized in that the vehicle head transmitting end comprises a transmitting polar plate, a first compensation network, an inverter and a direct current power supply which are sequentially connected;
the transmitting polar plate is arranged at the bottom of the vehicle head through an insulating medium;
the direct current power supply and the inverter are used for generating alternating current electric energy; the first compensation network is used for keeping the voltage of a relay polar plate of the ground relay terminal and the voltage of a rail constant; the transmitting polar plate is used for transmitting the alternating current electric energy to the ground relay terminal.
3. The multi-load power supply CPT system based on the relay plate as claimed in claim 1, wherein the receiving end of the carriage comprises a receiving plate, a second compensation network, a rectifier and a load which are connected in sequence;
the receiving polar plate is arranged at the bottom of the carriage through an insulating medium;
the receiving polar plate is used for receiving alternating current electric energy; the second compensation network is used for ensuring that the alternating current output voltage of the multi-load power supply CPT system is constant and the voltage of the input end of the rectifier is constant; the rectifier is used for converting alternating current electric energy into direct current electric energy.
4. The multi-load power CPT system of claim 2, wherein the DC power source comprises a power sourceU 0 (ii) a The power supplyU 0 Are connected to the inverter.
5. The multi-load power CPT system based on relay plates of claim 2, wherein the first compensation network comprises an inductorL P And a capacitorC P (ii) a Coupling capacitor is adopted between the transmitting polar plate and the relay polar plateC P1 ；
The inductorL P And a coupling capacitorC P1 In series, and a capacitor is connected in parallel to the connection pointC P 。
6. The multi-load powered CPT system of claim 3, wherein the second compensation network comprises an inductorL 1 And a capacitorC 1 (ii) a Coupling capacitor is adopted between the receiving polar plate and the relay polar plateC r1 ；
The inductorL 1 And a coupling capacitorC r1 In series, and a capacitor connected in parallel to the connection pointC 1 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211645327.5A CN115632493B (en) | 2022-12-21 | 2022-12-21 | Multi-load power supply CPT system based on relay polar plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211645327.5A CN115632493B (en) | 2022-12-21 | 2022-12-21 | Multi-load power supply CPT system based on relay polar plate |
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| CN115632493A CN115632493A (en) | 2023-01-20 |
| CN115632493B true CN115632493B (en) | 2023-03-14 |
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| CN108075575B (en) * | 2016-11-15 | 2023-12-19 | 天津中德应用技术大学 | Wireless transmission subway power supply system and charging method thereof |
| ES2768084T3 (en) * | 2017-03-07 | 2020-06-19 | Powermat Tech Ltd | Wireless power charging system |
| CN106828174B (en) * | 2017-03-13 | 2019-03-01 | 西南交通大学 | A kind of enhanced wireless charging system in multi-emitting source |
| CN109525046B (en) * | 2018-11-29 | 2021-06-01 | 东南大学 | Method for selecting working frequency point and optimizing plate voltage of bilateral LCLC type CPT system |
| CN113904460A (en) * | 2020-11-20 | 2022-01-07 | 国网江苏省电力有限公司 | Wireless energy receiving device and multistage guide rail type wireless energy transmission system |
| CN214255869U (en) * | 2020-12-25 | 2021-09-21 | 华南理工大学 | Relay coil type multi-load wireless power transmission system with constant output characteristic |
| CN113381515B (en) * | 2021-06-30 | 2022-11-22 | 东南大学 | Power decoupling multi-load electric field coupling type wireless power transmission system |
| CN113541323B (en) * | 2021-07-21 | 2023-08-22 | 东南大学 | Multi-capacity energy transmission system with multi-constant-current output |
| CN115037060A (en) * | 2022-06-06 | 2022-09-09 | 中车青岛四方机车车辆股份有限公司 | Multi-stage induction electric field type wireless electric energy transmission system and method and railway vehicle |
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