CN110632349A - Intelligent program-controlled testing device and testing method for direct-current charging pile - Google Patents

Intelligent program-controlled testing device and testing method for direct-current charging pile Download PDF

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Publication number
CN110632349A
CN110632349A CN201810653574.7A CN201810653574A CN110632349A CN 110632349 A CN110632349 A CN 110632349A CN 201810653574 A CN201810653574 A CN 201810653574A CN 110632349 A CN110632349 A CN 110632349A
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port
load
contactor
module
power supply
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陆峰
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Shanghai hanbiao Electronic Technology Co.,Ltd.
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Shanghai Wenshun Electrical Appliance Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The intelligent program-controlled testing device for the direct-current charging pile comprises a control circuit, a power line and a control circuit, wherein the control circuit is arranged in a box body and comprises a power line L1 port, a power line L2 port, a power line L3 port, a zero line N1 port and a grounding PE port, and the power line L1, the power line L2 port and the power line L3 port sequentially pass through an air switch, a phase sequence protector, a contactor KMDY contact, the input end of a frequency converter and a control area heat dissipation module and are finally connected with the input end; the output end of the transformer is connected in series with a power switch and a switching power supply A, and the switching power supply A is respectively connected in parallel with an instrument power supply module, a PLC, a switching power supply B and a switching power supply C; the switching power supply A is connected with the Hall sensor in series, the switching power supply B is connected with the touch screen in series, and the switching power supply C is connected with the mode conversion module in series. The invention meets the requirement of wide voltage test of the charging pile, realizes automatic adjustment of load resistance by equipment, realizes automatic load addition and subtraction operation, and improves the working efficiency of testers.

Description

Intelligent program-controlled testing device and testing method for direct-current charging pile
Technical Field
The invention belongs to the technical field of testing of direct-current charging piles of new energy electric vehicles, and particularly relates to an intelligent program-controlled testing device and a testing method of the direct-current charging piles.
Background
The direct current charging pile can simulate different currents and powers of a charging process of the charging pile for the electric bus through load testing, and the reliability, the stability and the functionality of the product are tested to determine whether the product meets national standard requirements and design requirements.
Introduction of main functions of the load box:
the working principle is as follows: the direct current fills electric pile theory of operation for exchanging commercial power AC380V three-phase electricity and converting into direct current voltage and charging for the group battery of electronic big bus, different group battery specifications have decided different charging voltage and charging current size, therefore the test of direct current fills electric pile simulates the test condition of different voltage and different capacity through the load box and provides fine test platform. The theory of operation of load box is through adjusting resistance value, according to ohm's law, under the unchangeable condition of rated test voltage (fill electric pile output voltage promptly), the output current and the power change that can realize filling electric pile of change of resistance value: i ═ U/R (current I ═ output voltage U/resistor R) P ═ U2R (power P ═ voltage U squared divided by resistance);
the control mode is as follows: at present, most load boxes are controlled in a manual switching mode (direct control of a circuit breaker or control of a contactor), one load box is generally provided with a plurality of fixed gears, different resistance values can be simulated through combination of different gears, and therefore adjustment of test current and power is achieved (resistance values are adjusted in parallel connection, the more the parallel connection quantity is, the smaller the resistance value is);
and (3) displaying data: when the load box works, the output voltage and the test current value of the real-time charging pile can be observed through an equipment panel instrument;
a cooling mode: the fan is used for forcibly cooling, when the load box works, the resistance tube converts electric energy into heat energy, so that the cooling fan is required to blow the resistance heating area to perform air heat exchange when the load box works, and the heat dissipation effect is achieved;
the wiring mode is as follows: the bus copper bar or the binding post is led out and is used for connecting a positive output bus and a negative output bus of the direct current charging pile;
the following technical defects exist in use: 1) manual switch control mode, number of loadsThe value needs to be manually calculated to select a proper resistance gear, a breaker and the like are controlled to be direct strong current switching, potential safety hazards exist, the number of switches is large, the fault rate is high, and the maintenance is inconvenient; 2) the single-voltage loop design is adopted, the compatibility of the equipment is poor, and when the actual test voltage is lower than the rated voltage for testing, the output maximum power is obviously reduced; p is U2R (power to voltage ratio squared proportional); for example, in a device with a rated voltage of 800V100KW, when the actual access voltage is 400V, the maximum test power is 100/4 — 25KW (the actual test voltage is 1/2 of the rated value, and the power is calculated as 1/4), obviously, when the load box with 100KW is tested at a low voltage, the power is greatly reduced, and the requirement of a high-power test at a low voltage cannot be met; p is U2R (power to voltage ratio squared proportional); 3) the requirement of equipment networking cannot be met, and the automation integration control degree is poor; 4) the protection function is not comprehensive; 5) in the traditional design, when a user performs a low-power load test (under the condition that the requirement on heat dissipation capacity is not high during the low-power test), the fan always works at a rated high rotating speed, and the noise is high as that during full-load work; 6) in the test process, testers need to stare at the test equipment all the time and record data, the traditional load box design still stays at the stage that the test data needs to be recorded manually, and the test efficiency is low.
How to design one kind and satisfy filling electric pile of wide voltage test demand, how to realize that equipment realizes adjusting load resistance automatically, how to realize automatic add and subtract load operation, how to improve tester's work efficiency, how to make the whole automatic record of test data in the test process, become the problem that the solution is badly needed.
Disclosure of Invention
The object of the present invention is to solve the above technical problems.
Direct current fills programme-controlled testing arrangement of electric pile intelligence, including the box, all be provided with stabilizer blade, its characterized in that on four angles of bottom half: the upper part of the front panel of the box body is provided with a touch screen, and the right side of the touch screen is sequentially provided with a power switch, a local/remote lamp, a fault alarm lamp and an emergency stop switch from top to bottom; the touch screen is connected with the PLC in the box body; the lower parts of two side surfaces of the box body are provided with heat radiating ports; the top of the box body is provided with air outlets; the lower part of the rear end face of the box body is sequentially provided with a load anode port, a load cathode port, a voltage signal component port, a working power supply port, a remote control port and a grounding port from right to left; a control circuit is arranged in the box body, a working power supply port is a five-core socket, and a remote control port is a three-core socket; the remote control port is an RS485 communication remote control port; the voltage signal component port consists of a voltage signal U + port and a voltage signal U-port; the voltage signal U + port and the voltage signal U-port are on the same vertical plane;
the control circuit comprises a live wire L1 port, a live wire L2 port, a live wire L3 port, a zero line N1 port and a grounding PE port, wherein the live wire L1 port, the live wire L2 port, the live wire L3 port, the zero line N1 port and the grounding PE port are all connected with a working power supply port, the live wire L1 port, the live wire L2 port and the live wire L3 port are sequentially connected with an air switch, a phase sequence protector, a contactor KMDY contact, the input end of a frequency converter and a control area heat dissipation module, and are finally connected with the input end of a transformer, and the transformer is a 220V-to-24V transformer;
the output end of the frequency converter is respectively connected with the load heat dissipation module, the fan switch module and the analog quantity module;
a phase sequence protection module is arranged between a live wire L3 section between the phase sequence protector and the contactor KMDY contact and a zero wire N1 port, and the phase sequence protection module is formed by connecting the phase sequence protector contact and the contactor KMDY in series;
the load heat dissipation module is a FAN FAN;
the control area heat dissipation module comprises a FAN FAN1 and a FAN FAN2, wherein the FAN FAN1 is connected with the FAN FAN2 in parallel;
the output end of the transformer is connected in series with a power switch and a switching power supply A, and the switching power supply A is respectively connected in parallel with an instrument power supply module, a PLC, a switching power supply B and a switching power supply C; the switching power supply A is connected with the Hall sensor in series, the switching power supply B is connected with the touch screen in series, and the switching power supply C is connected with the mode conversion module in series;
the mode conversion module consists of nine groups of relays and contactors, wherein the first group is that a KA1000V normally open contact of the relay A is sequentially connected in series with a KA500V normally closed contact and a contactor KM 1000V; the second group is that a KA500V normally open contact of the relay B is sequentially connected in series with a KA1000V normally closed contact and a contactor KM 500V; the third group is that the KAB1 normally open contact of the intermediate relay A is connected with a contactor KMB11 in series, and a contactor KMB12 is connected with the contactor KMB11 in parallel; the KAB2 normally open contact of the intermediate relay B is connected in series with the contactor KMB13, and the contactor KMB14 is connected in parallel on the contactor KMB 13; the fifth group is that the KAB3 normally open contact of the intermediate relay C is connected with a contactor KMB15 in series, and a contactor KMB16 is connected with the contactor KMB15 in parallel; the sixth group is that the KAB4 normally open contact of the intermediate relay D is connected with a contactor KMB17 in series, and a contactor KMB18 is connected with the contactor KMB17 in parallel; the seventh group is that the KAB5 normally open contact of the intermediate relay E is connected with a contactor KMB19 in series, and a contactor KMB20 is connected with the contactor KMB19 in parallel; the eighth group is that the KAB6 normally open contact of the intermediate relay F is connected with a contactor KMB21 in series, and a contactor KMB22 is connected with the contactor KMB21 in parallel; and the ninth group is that the KAB7 normally open contact of the intermediate relay G is connected with a contactor KMB23 in series, and a contactor KMB24 is connected with the contactor KMB23 in parallel.
The test method of the intelligent program-controlled test device for the direct-current charging pile comprises a PLC main processor, wherein the PLC main processor is respectively connected with an HMI (human machine interface) touch device, a switching value signal input module, a frequency converter, an extended remote communication interface, an electrical parameter acquisition module and a load switching relay set, the load switching relay set is connected with a load element, and the frequency converter is connected with a fan, and the test method is characterized in that: the method comprises the following operation steps:
A) and starting a system:
B) resetting the loading timing;
C) and starting load loading:
according to a voltage mode set by the touch screen, the dual-voltage design is divided into a low-voltage gear and a high-voltage gear, and a load mode, wherein a constant-power mode or a constant-current mode can be selected by a user on the touch screen interface, and the user can load the constant-power mode or the constant-current mode by preset time and a loading numerical value;
D) starting an automatic compensation program and setting a load judgment module:
firstly, starting an automatic compensation program, and comparing a voltage and current value acquired by an electric parameter module with a user set value by a PLC (programmable logic controller) in real time until the error of the actual voltage and current value is within a set precision range, finishing compensation and realizing high-precision adjustment;
starting a set load judging module, judging whether the load is changed or not by the set load judging module, and restarting the set load judging module after loading a new set load when the load is changed;
E) in the whole testing process, the system carries out system fault detection, if a fault is detected, a fault prompt is activated, a fault alarm rings, and the system enters a fan fault judgment module;
firstly, when the fan is judged to be in fault, the fan stops, and the system automatically cuts off the load;
when judging that the fan has no fault, the system automatically cuts off the load;
F) in the whole test process, the unloading button judging module detects, and when the unloading button is pressed, the system automatically cuts off the load;
G) when the unloading button is not pressed, the loading time is counted, the set loading time judgment module is entered,
firstly, when the set loading time is greater than 0 and reaches a set value, the system automatically disconnects the load;
when the set loading time is not more than 0, entering an unloading button judgment module for retesting;
H) the system detects that the current loading process is in the process of starting the fan, and the PLC adjusts the rotating speed of the fan according to the actual voltage and current value of the electric parameter acquisition module, namely the load rate;
I) after the load is disconnected, the system detects that no load exists at present, automatically starts a fan delayed shutdown program, and enters a delayed judgment module:
firstly, when the delay judging module judges that the delay time is up, the fan stops;
secondly, when the delay judging module judges that the delay time is not up, the delay judging module is re-entered;
J) and then the process is finished.
In the step D), automatic compensation is time timing, when the compensation time is up, the system value judgment module judges whether the system error is larger than a set threshold value, and when the system error is larger than the set threshold value, the automatic compensation program is restarted after the error load is compensated.
The device has a reasonable structure, meets the requirement of wide voltage test of the charging pile, realizes automatic adjustment of load resistance of equipment, realizes automatic load addition and subtraction operation, can automatically record test data in the test process in the whole process, improves the working efficiency of testers, has good economic and social benefits when popularized and applied, and has good economic and social benefits when popularized and applied.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a right side view of the present invention.
Fig. 3 is a rear view of the present invention.
Fig. 4 is a control circuit diagram between the operation power supply port and the transformer of the present invention.
Fig. 5 is a control circuit diagram between the transformer and the switching power supply C of the present invention.
Fig. 6 is a control circuit diagram of the switching power supply C of the present invention connected to the mode conversion module.
Fig. 7 is a system configuration diagram of the present invention.
Fig. 8 is a process flow diagram of the present invention.
In the figure: 1. a box body; 2. a touch screen; 3. a power switch; 4. a local/remote light; 5. a fault warning lamp; 6. a scram switch; 7. a load positive port; 8. a load negative port; 9. a voltage signal component port; 10. a working power supply port; 11. a remote control port; 12. a ground port; 13. an air switch; 14. a contactor KMDY contact; 15. a phase sequence protector contact; 16. a transformer.
Detailed Description
The invention is further described with reference to the accompanying drawings, but is not to be construed as being limited thereto.
The intelligent program-controlled testing device for the direct-current charging pile comprises a box body 1, wherein supporting legs are arranged at four corners of the bottom of the box body 1, a touch screen 2 is arranged at the upper part of a front panel of the box body 1, and a power switch 3, a local/remote lamp 4, a fault alarm lamp 5 and an emergency stop switch 6 are sequentially arranged on the right side of the touch screen 2 from top to bottom; the touch screen 2 is connected with the PLC in the box body 1; the lower parts of two side surfaces of the box body 1 are provided with heat radiating ports; the top of the box body 1 is provided with air outlets; the lower part of the rear end face of the box body 1 is sequentially provided with a load anode port 7, a load cathode port 8, a voltage signal component port 9, a working power supply port 10, a remote control port 11 and a grounding port 12 from right to left; a control circuit is arranged in the box body 1, a working power supply port 10 is a five-core socket, and a remote control port 11 is a three-core socket; the remote control port 11 is an RS485 communication remote control port; the voltage signal component port 9 consists of a voltage signal U + port and a voltage signal U-port; the voltage signal U + port and the voltage signal U-port are on the same vertical plane;
the control circuit comprises a live wire L1 port, a live wire L2 port, a live wire L3 port, a zero line N1 port and a grounding PE port, wherein the live wire L1 port, the live wire L2 port, the live wire L3 port, the zero line N1 port and the grounding PE port are all connected with the working power supply port 10, the live wire L1 port, the live wire L2 port and the live wire L3 port are sequentially connected with an air switch 13, a phase sequence protector, a contactor KMDY contact 14, the input end of the frequency converter and a control area heat dissipation module, and are finally connected with the input end of a transformer 16, and the transformer 16 is a 220V-to-24V transformer;
the output end of the frequency converter is respectively connected with the load heat dissipation module, the fan switch module and the analog quantity module;
a phase sequence protection module is arranged between a live wire L3 section between the phase sequence protector and the contactor KMDY contact 14 and a zero wire N1 port, and the phase sequence protection module is formed by connecting a phase sequence protector contact 15 and a contactor KMDY in series;
the load heat dissipation module is a FAN FAN;
the control area heat dissipation module comprises a FAN FAN1 and a FAN FAN2, wherein the FAN FAN1 is connected with the FAN FAN2 in parallel;
the output end of the transformer 16 is connected in series with a power switch 3 and a switch power supply A, and the switch power supply A is respectively connected in parallel with an instrument power supply module, a PLC, a switch power supply B and a switch power supply C; the switching power supply A is connected with the Hall sensor in series, the switching power supply B is connected with the touch screen 2 in series, and the switching power supply C is connected with the mode conversion module in series;
the mode conversion module consists of nine groups of relays and contactors, wherein the first group is that a KA1000V normally open contact of the relay A is sequentially connected in series with a KA500V normally closed contact and a contactor KM 1000V; the second group is that a KA500V normally open contact of the relay B is sequentially connected in series with a KA1000V normally closed contact and a contactor KM 500V; the third group is that the KAB1 normally open contact of the intermediate relay A is connected with a contactor KMB11 in series, and a contactor KMB12 is connected with the contactor KMB11 in parallel; the KAB2 normally open contact of the intermediate relay B is connected in series with the contactor KMB13, and the contactor KMB14 is connected in parallel on the contactor KMB 13; the fifth group is that the KAB3 normally open contact of the intermediate relay C is connected with a contactor KMB15 in series, and a contactor KMB16 is connected with the contactor KMB15 in parallel; the sixth group is that the KAB4 normally open contact of the intermediate relay D is connected with a contactor KMB17 in series, and a contactor KMB18 is connected with the contactor KMB17 in parallel; the seventh group is that the KAB5 normally open contact of the intermediate relay E is connected with a contactor KMB19 in series, and a contactor KMB20 is connected with the contactor KMB19 in parallel; the eighth group is that the KAB6 normally open contact of the intermediate relay F is connected with a contactor KMB21 in series, and a contactor KMB22 is connected with the contactor KMB21 in parallel; and the ninth group is that the KAB7 normally open contact of the intermediate relay G is connected with a contactor KMB23 in series, and a contactor KMB24 is connected with the contactor KMB23 in parallel.
The test method of the intelligent program-controlled test device for the direct-current charging pile comprises a PLC main processor, wherein the PLC main processor is respectively connected with an HMI (human machine interface) touch device, a switching value signal input module, a frequency converter, an extended remote communication interface, an electrical parameter acquisition module and a load switching relay set, the load switching relay set is connected with a load element, and the frequency converter is connected with a fan, and the test method is characterized in that: the method comprises the following operation steps:
A) and starting a system:
B) resetting the loading timing;
C) and starting load loading:
according to a voltage mode set by the touch screen, the dual-voltage design is divided into a low-voltage gear and a high-voltage gear, and a load mode, wherein a constant-power mode or a constant-current mode can be selected by a user on the touch screen interface, and the user can load the constant-power mode or the constant-current mode by preset time and a loading numerical value;
D) starting an automatic compensation program and setting a load judgment module:
firstly, starting an automatic compensation program, and comparing a voltage and current value acquired by an electric parameter module with a user set value by a PLC (programmable logic controller) in real time until the error of the actual voltage and current value is within a set precision range, finishing compensation and realizing high-precision adjustment;
starting a set load judging module, judging whether the load is changed or not by the set load judging module, and restarting the set load judging module after loading a new set load when the load is changed;
E) in the whole testing process, the system carries out system fault detection, if a fault is detected, a fault prompt is activated, a fault alarm rings, and the system enters a fan fault judgment module;
firstly, when the fan is judged to be in fault, the fan stops, and the system automatically cuts off the load;
when judging that the fan has no fault, the system automatically cuts off the load;
F) in the whole test process, the unloading button judging module detects, and when the unloading button is pressed, the system automatically cuts off the load;
G) when the unloading button is not pressed, the loading time is counted, the set loading time judgment module is entered,
firstly, when the set loading time is greater than 0 and reaches a set value, the system automatically disconnects the load;
when the set loading time is not more than 0, entering an unloading button judgment module for retesting;
H) the system detects that the current loading process is in the process of starting the fan, and the PLC adjusts the rotating speed of the fan according to the actual voltage and current value of the electric parameter acquisition module, namely the load rate;
I) after the load is disconnected, the system detects that no load exists at present, automatically starts a fan delayed shutdown program, and enters a delayed judgment module:
firstly, when the delay judging module judges that the delay time is up, the fan stops;
secondly, when the delay judging module judges that the delay time is not up, the delay judging module is re-entered;
J) and then the operation is finished;
in the step D), automatic compensation is time timing, when the compensation time is up, the system value judgment module judges whether the system error is larger than a set threshold value, and when the system error is larger than the set threshold value, the automatic compensation program is restarted after the error load is compensated.
In specific implementation, the beneficial effects of the invention are as follows:
1) the dual-voltage loop design is characterized in that 2 groups of resistor stacks with the same voltage grade are configured in the equipment, the 2 groups of resistor stacks can be combined in series or in parallel according to the test requirement, the high-voltage test can be met when the resistor stacks are connected in series, and the low-voltage test can be met when the resistor stacks are connected in parallel; the power of the combined series or parallel 2 groups of resistor stacks can reach the maximum power; the design just aims at the characteristic of wide voltage output of the direct current charging pile, the access use of wider test voltage is met, the output capability of large current and high power is also realized during low voltage test, the compatibility of the equipment is stronger, a user can test products with more specifications through one piece of equipment, different test points are not required to purchase different tests, and the multiple purposes of one machine are realized;
examples are: dual voltage design 800V100 KW:
2 groups of 400V 50KW resistor stacks are designed, the 2 groups of resistor stacks are connected in series to meet the test requirement of 800V100KW, and the 2 groups of resistor stacks are connected in parallel to meet the test requirement of 400V 100 KW;
the compatibility of a double-voltage design is better, and the method is more suitable for the wide voltage test requirement of the charging pile;
2) touch-sensitive screen intelligent control: the touch screen control is adopted, the man-machine interaction is more friendly, and the original various interfaces of the manual switch button in the control area become concise and beautiful;
3) and load addition and subtraction operation: the touch screen integrates the similar functions of manual control, and also supports the automatic load increasing and decreasing function, and a user only needs to output a test current or a power value, so that the equipment automatically realizes the adjustment of a load resistor and the automatic load increasing and decreasing operation;
4) the constant current or constant power control of the load can be realized: namely, under the condition that the test voltage changes, the equipment can automatically identify the current test voltage and automatically adjust the current value to the power value or the current value set by a customer; the design greatly improves the overall precision of the equipment and improves the user experience, a user does not need to convert the input power under different voltages any more, the power is automatically calculated by the equipment, and the power can be accurately adjusted to a set value precision interval (a PLC central processing unit compares a test current value or a power value set by the user with a value sampled by actual voltage and current in real time and adjusts a load gear relay to realize the adjustment of a resistance value until the voltage and current sampling value and the set value are in the equipment precision error range);
5) the testing time can be set as follows: the user can preset the test time, automatically unload the test result and automatically close the cooling fan in a delayed manner after the test is finished, and the test personnel does not need to be kept on the side all the time in the test process, so that the working efficiency and the quality of the test personnel are improved, and the working efficiency of a user enterprise is improved;
6) the scheme realizes low-noise work of the equipment during low-power test, and humanized design improves user experience (a PLC acquires and tracks the current test power or current of the equipment in real time and controls the output of a frequency converter according to proportion to realize linear synchronous change of the rotating speed of the fan according to load current and power);
7) and multiple system protection: the system protection method comprises the following steps of instrument communication, PLC communication, fan fault, overtemperature, polarity reversal connection, overvoltage and overcurrent comprehensive system protection, wherein all protection is monitored by the PLC in real time, and when the fault occurs, the load is cut off, and the alarm prompt is given;
compared with the traditional load box, the protection function of the equipment is more comprehensive and direct;
8) and data automatic storage and recording: the test data in the test process does not need to be manually recorded, the data is automatically recorded in the whole process, and the data can be exported into an Excel table form;
9) and expanding the communication capacity: besides the control of the local touch screen, the system also provides an expanded communication port, can realize remote intelligent control, and enriches the test interfaces of automatic integrated tests or industrial 4.0 platforms.
The device mainly comprises a PLC, a touch screen, a frequency converter, a load element, a load switching relay group, an electrical parameter acquisition module, a fan, an input switching value (a wind pressure signal, an emergency stop switching signal and the like) and a remote control interface;
the load main body is composed of a load switching relay group and a load element, different resistance values can be adjusted by cutting off fixed resistance gears through different relay combinations, and therefore the current and power values of the test loop are changed;
a user inputs a test power value or a current value through a touch screen interface, the touch screen sends an instruction to a PLC central processing unit, and the instruction is converted to drive a load switching relay which meets the action corresponding to a set value;
after the relay group switches the resistance gear, the load is loaded, and the electric parameter acquisition module sends the actual voltage and current values to the PLC central processing unit;
after receiving the actual voltage and current values, the PLC central processing unit:
1) firstly, comparing with a set numerical value of a user touch screen or a numerical value sent by a remote control interface, and if the error requirement is not met, automatically adjusting the power and the current value by the equipment until the precision is reached;
2) controlling the output of the frequency converter, automatically adjusting the revolution of the fan, and realizing intelligent frequency conversion control of the fan based on actual power and current;
the switching value input information is mainly used for collecting the state of the fan and collecting the state of the temperature switching value information, when the fan fault and the overtemperature fault occur to equipment, the PLC can obtain a fault signal at the first time to realize the purpose of protecting the equipment, meanwhile, the emergency stop switching information can be pressed down to the PLC, and the system triggers the emergency stop function.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. It will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure without departing from the spirit or essential characteristics of the invention, and it is not desired to exhaustively enumerate all embodiments, but rather those variations and modifications which are obvious and can be derived therefrom within the scope of the invention.

Claims (3)

1. Direct current fills programme-controlled testing arrangement of electric pile intelligence, including box (1), all be provided with stabilizer blade, its characterized in that on four angles of box (1) bottom: the upper part of the front panel of the box body (1) is provided with a touch screen (2), and the right side of the touch screen (2) is sequentially provided with a power switch (3), a local/remote lamp (4), a fault alarm lamp (5) and an emergency stop switch (6) from top to bottom; the touch screen (2) is connected with a PLC in the box body (1); the lower parts of two side surfaces of the box body (1) are provided with heat radiating ports; the top of the box body (1) is provided with air outlets; the lower part of the rear end face of the box body (1) is sequentially provided with a load anode port (7), a load cathode port (8), a voltage signal component port (9), a working power supply port (10), a remote control port (11) and a grounding port (12) from right to left; a control circuit is arranged in the box body (1), the working power supply port (10) is a five-core socket, and the remote control port (11) is a three-core socket; the remote control port (11) is an RS485 communication remote control port; the voltage signal component port (9) consists of a voltage signal U + port and a voltage signal U-port; the voltage signal U + port and the voltage signal U-port are on the same vertical plane;
the control circuit comprises a live wire L1 port, a live wire L2 port, a live wire L3 port, a zero line N1 port and a grounding PE port, wherein the live wire L1 port, the live wire L2 port, the live wire L3 port, the zero line N1 port and the grounding PE port are all connected with a working power supply port (10), the live wire L1 port, the live wire L2 port and the live wire L3 port are sequentially connected with an air switch (13), a phase sequence protector, a contactor KMDY contact (14), the input end of a frequency converter and a control area heat dissipation module, and are finally connected with the input end of a transformer (16), and the transformer (16) is a 220 v-24 v transformer;
the output end of the frequency converter is respectively connected with the load heat dissipation module, the fan switch module and the analog quantity module;
a phase sequence protection module is arranged between a live wire L3 section between the phase sequence protector and the contactor KMDY contact (14) and a zero wire N1 port, and the phase sequence protection module is formed by connecting a phase sequence protector contact (15) and the contactor KMDY in series;
the load heat dissipation module is a FAN FAN;
the control area heat dissipation module comprises a FAN FAN1 and a FAN FAN2, wherein the FAN FAN1 is connected with the FAN FAN2 in parallel;
the output end of the transformer (16) is connected in series with a power switch (3) and a switching power supply A, and the switching power supply A is respectively connected in parallel with an instrument power supply module, a PLC, a switching power supply B and a switching power supply C; the switching power supply A is connected with the Hall sensor in series, the switching power supply B is connected with the touch screen (2) in series, and the switching power supply C is connected with the mode conversion module in series;
the mode conversion module consists of nine groups of relays and contactors, wherein the first group is that a KA1000V normally open contact of the relay A is sequentially connected in series with a KA500V normally closed contact and a contactor KM 1000V; the second group is that a KA500V normally open contact of the relay B is sequentially connected in series with a KA1000V normally closed contact and a contactor KM 500V; the third group is that the KAB1 normally open contact of the intermediate relay A is connected with a contactor KMB11 in series, and a contactor KMB12 is connected with the contactor KMB11 in parallel; the KAB2 normally open contact of the intermediate relay B is connected in series with the contactor KMB13, and the contactor KMB14 is connected in parallel on the contactor KMB 13; the fifth group is that the KAB3 normally open contact of the intermediate relay C is connected with a contactor KMB15 in series, and a contactor KMB16 is connected with the contactor KMB15 in parallel; the sixth group is that the KAB4 normally open contact of the intermediate relay D is connected with a contactor KMB17 in series, and a contactor KMB18 is connected with the contactor KMB17 in parallel; the seventh group is that the KAB5 normally open contact of the intermediate relay E is connected with a contactor KMB19 in series, and a contactor KMB20 is connected with the contactor KMB19 in parallel; the eighth group is that the KAB6 normally open contact of the intermediate relay F is connected with a contactor KMB21 in series, and a contactor KMB22 is connected with the contactor KMB21 in parallel; and the ninth group is that the KAB7 normally open contact of the intermediate relay G is connected with a contactor KMB23 in series, and a contactor KMB24 is connected with the contactor KMB23 in parallel.
2. The test method of the intelligent program-controlled test device for the direct-current charging pile comprises a PLC main processor, wherein the PLC main processor is respectively connected with an HMI (human machine interface) touch device, a switching value signal input module, a frequency converter, an extended remote communication interface, an electrical parameter acquisition module and a load switching relay set, the load switching relay set is connected with a load element, and the frequency converter is connected with a fan, and the test method is characterized in that: the method comprises the following operation steps:
A) and starting a system:
B) resetting the loading timing;
C) and starting load loading:
according to a voltage mode set by the touch screen, the dual-voltage design is divided into a low-voltage gear and a high-voltage gear, and a load mode, wherein a constant-power mode or a constant-current mode can be selected by a user on the touch screen interface, and the user can load the constant-power mode or the constant-current mode by preset time and a loading numerical value;
D) starting an automatic compensation program and setting a load judgment module:
firstly, starting an automatic compensation program, and comparing a voltage and current value acquired by an electric parameter module with a user set value by a PLC (programmable logic controller) in real time until the error of the actual voltage and current value is within a set precision range, finishing compensation and realizing high-precision adjustment;
starting a set load judging module, judging whether the load is changed or not by the set load judging module, and restarting the set load judging module after loading a new set load when the load is changed;
E) in the whole testing process, the system carries out system fault detection, if a fault is detected, a fault prompt is activated, a fault alarm rings, and the system enters a fan fault judgment module;
firstly, when the fan is judged to be in fault, the fan stops, and the system automatically cuts off the load;
when judging that the fan has no fault, the system automatically cuts off the load;
F) in the whole test process, the unloading button judging module detects, and when the unloading button is pressed, the system automatically cuts off the load;
G) when the unloading button is not pressed, the loading time is counted, the set loading time judgment module is entered,
firstly, when the set loading time is greater than 0 and reaches a set value, the system automatically disconnects the load;
when the set loading time is not more than 0, entering an unloading button judgment module for retesting;
H) the system detects that the current loading process is in the process of starting the fan, and the PLC adjusts the rotating speed of the fan according to the actual voltage and current value of the electric parameter acquisition module, namely the load rate;
I) after the load is disconnected, the system detects that no load exists at present, automatically starts a fan delayed shutdown program, and enters a delayed judgment module:
firstly, when the delay judging module judges that the delay time is up, the fan stops;
secondly, when the delay judging module judges that the delay time is not up, the delay judging module is re-entered;
J) and then the process is finished.
3. The testing method of the intelligent program-controlled testing device of the direct-current charging pile according to claim 2, characterized in that: in the step D), automatic compensation is time timing, when the compensation time is up, the system value judgment module judges whether the system error is larger than a set threshold value, and when the system error is larger than the set threshold value, the automatic compensation program is restarted after the error load is compensated.
CN201810653574.7A 2018-06-22 2018-06-22 Intelligent program-controlled testing device and testing method for direct-current charging pile Pending CN110632349A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113156327A (en) * 2021-03-11 2021-07-23 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） Charging pile verification method and device based on wireless communication
CN113569421A (en) * 2021-08-04 2021-10-29 特瓦特能源科技有限公司 Charging pile testing method and related equipment
CN117491761A (en) * 2023-09-04 2024-02-02 吉事励电子(苏州)有限公司 DC charging pile testing device and testing method
CN117590116A (en) * 2023-11-16 2024-02-23 南京能可瑞科技有限公司 DC configurable power load test method and device based on inversion technology

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113156327A (en) * 2021-03-11 2021-07-23 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） Charging pile verification method and device based on wireless communication
CN113569421A (en) * 2021-08-04 2021-10-29 特瓦特能源科技有限公司 Charging pile testing method and related equipment
CN117491761A (en) * 2023-09-04 2024-02-02 吉事励电子(苏州)有限公司 DC charging pile testing device and testing method
CN117491761B (en) * 2023-09-04 2024-05-03 吉事励电子(苏州)有限公司 DC charging pile testing device and testing method
CN117590116A (en) * 2023-11-16 2024-02-23 南京能可瑞科技有限公司 DC configurable power load test method and device based on inversion technology

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