A multi-meter AC charging pile power basic error detection system and detection method

Abstract

The present invention discloses a multi-meter AC charging pile electric energy basic error detection system, including N interface simulators, N electric energy error calibration devices, an adjustable load and a main control machine; the first tested AC charging pile is connected to the input end of the first interface simulator, the output end of the first interface simulator is connected to the input end of the second tested AC charging pile, the output end of the M-1 tested AC charging pile is connected to the input end of the M-1 interface simulator, the output end of the M-1 interface simulator is connected to the input end of the M-tested AC charging pile, the output end of the M-tested AC charging pile is connected to the input end of the M-th interface simulator, and the output end of the M-th interface simulator is connected to the adjustable load. The detection system and method disclosed in the present invention enable multiple charging piles to detect active electric energy errors together in a laboratory and use only one load, thereby improving detection efficiency, saving time and energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging pile detection, and in particular to a multi-surface AC charging pile electric energy basic error detection system and detection method. Background Art

[0002] In the prior art, the detection system for the basic error of the electric energy of an AC charging pile mainly adopts a set of detection equipment to detect a charging pile. Each set of detection equipment needs to be equipped with a set of loads to realize the detection of the basic error of the electric energy of the AC charging pile. There are problems such as low detection efficiency, inability to reuse loads, and time and energy consumption. Summary of the invention

[0003] One of the technical problems to be solved by the present invention is to provide a multi-meter AC charging pile electric energy basic error detection system, which can detect active electric energy errors of multiple charging piles together and only needs to be equipped with one load, thereby improving detection efficiency and saving time and energy consumption.

[0004] One of the technical problems to be solved by the present invention is achieved as follows:

[0005] A multi-meter AC charging pile power basic error detection system includes N interface simulators, N power error calibration devices, an adjustable load and a main control machine, wherein N≧2;

[0006] The first tested AC charging pile is connected to the input end of the first interface simulator, the output end of the first interface simulator is connected to the input end of the second tested AC charging pile, the output end of the M-1 tested AC charging pile is connected to the input end of the M-1 interface simulator, the output end of the M-1 interface simulator is connected to the input end of the M tested AC charging pile, the output end of the M tested AC charging pile is connected to the input end of the M interface simulator, and the output end of the M interface simulator is connected to the adjustable load, wherein M≧2, and M is not greater than N;

[0007] Each of the electric energy error checking devices comprises a test meter and a control circuit; the test meter is connected to the output end of the corresponding interface simulator for detecting electric power parameters; the control circuit is connected to the corresponding interface simulator for controlling the interface simulator;

[0008] The main control machine is connected to each of the electric energy error checking devices, controls the interface simulator through the control circuit, and obtains the error detection result through the test instrument.

[0009] Furthermore, each of the interface simulators includes an interface cabinet and an interface control simulation circuit;

[0010] The interface cabinet is provided with an interface corresponding to the AC charging pile to be tested;

[0011] The interface control analog circuit input end is connected to the interface cabinet output end, and the interface control analog circuit output end is connected to the input end of the tested AC charging pile or the adjustable load.

[0012] Further, the interface control simulation circuit includes a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, a switch K6, a switch K7, a diode D1, a resistor R2, a resistor R3 and a switch S2, for realizing a simulation equivalent resistance simulation function;

[0013] The first end of the switch K1 is connected to the L1 port of the tested AC charging pile through the interface cabinet, the second end of the switch K1 is connected to the L1 port of the tested AC charging pile or the L1 port of the adjustable load, and the second end of the switch K1 is provided with a detection point 1 and a detection point 2;

[0014] The first end of the switch K2 is connected to the L2 port of the tested AC charging pile through the interface cabinet, the second end of the switch K2 is connected to the L2 port of the tested AC charging pile or the L2 port of the adjustable load, and the second end of the switch K2 is provided with a detection point 3 and a detection point 4;

[0015] The first end of the switch K3 is connected to the L3 port of the tested AC charging pile through the interface cabinet, the second end of the switch K3 is connected to the L3 port of the tested AC charging pile or the L3 port of the adjustable load, and the second end of the switch K3 is provided with a detection point 5 and a detection point 6;

[0016] The first end of the switch K4 is connected to the L4 port of the tested AC charging pile through the interface cabinet, the second end of the switch K4 is connected to the L4 port of the tested AC charging pile or the L4 port of the adjustable load, and the second end of the switch K3 is provided with a detection point 7 and a detection point 8;

[0017] The first end of the switch K5 is connected to the PE port of the tested AC charging pile through the interface cabinet;

[0018] The first end of the switch K6 is connected to the CP port of the tested AC charging pile through the interface cabinet;

[0019] The switch K7 connects the second end of the switch K5 and the second end of the switch K6;

[0020] The first end of the diode D1 is connected to the second end of the switch K6;

[0021] The first end of the resistor R3 is connected to the second end of the diode D1, the second end of the resistor R3 is connected to the second end of the switch K5, and the adjustment range of the resistor R3 is 1800-4799Ω;

[0022] The first end of the resistor R2 is connected to the second end of the diode D1, the second end of the resistor R2 is connected to the first end of the switch S2, the second end of the switch S2 is connected to the second end of the resistor R3, and the adjustment range of the resistor R2 is 900-1799Ω.

[0023] Furthermore, the adjustable load is a programmable AC load.

[0024] Furthermore, the main control machine and the electric energy error checking device are connected via an RS232 serial port, a network cable or a USB serial port.

[0025] The second technical problem to be solved by the present invention is to provide a method for detecting basic errors of electric energy of a multi-meter AC charging pile, so that multiple charging piles can detect active electric energy errors together, and only one load is needed, thereby improving detection efficiency, saving time and energy consumption.

[0026] The second technical problem to be solved by the present invention is achieved as follows:

[0027] A method for detecting basic errors in electric energy of a multi-meter AC charging pile is based on the above-mentioned basic error detection system for electric energy of a multi-meter AC charging pile, and the method comprises the following steps:

[0028] Step 10, the main control machine communicates with the electric energy error checking device and issues a detection instruction;

[0029] Step 20, the electric energy error checking device controls the switch closing and resistance adjustment of the interface simulator, and establishes signal transmission with the tested AC charging pile through the interface simulator;

[0030] Step 30, the electric energy error checking device collects a first signal from the electric energy pulse port and a second signal from the output end of the interface simulator, and obtains a basic error of the electric energy of the charging pile by comparing the error between the first signal and the second signal;

[0031] Step 40: The electric energy error checking device sends the basic error to the main control machine.

[0032] Furthermore, the method further comprises:

[0033] Step 50: After receiving the basic error, the host control computer processes the result into a report and displays it on a display device.

[0034] The present invention has the following advantages:

[0035] By cascading the charging piles and multiplexing the loads, it is possible to detect the power errors of multiple charging piles at one time without the need for multiple sets of loads, saving time and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of a multi-meter AC charging pile power basic error detection system according to an embodiment of this specification;

[0038] Figure 2 This is a partial enlarged view of a multi-meter AC charging pile power basic error detection system A in the embodiment of this specification;

[0039] Figure 3 This is a flow chart of a method for detecting basic errors in electric energy of a multi-meter AC charging pile according to an embodiment of this specification;

[0040] Description of reference numerals:

[0041] 10-interface simulator, 20-electric energy error calibration device, 30-adjustable load, 40-master control machine, 50-measured AC charging pile, 101-interface cabinet, 102-interface control simulation circuit, 1 to 8 correspond to detection point 1 to detection point 8. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0043] like Figure 1 As shown, the embodiment of this specification discloses a multi-meter AC charging pile power basic error detection system, including N interface simulators 10, N power error calibration devices 20, an adjustable load 30 and a main control machine 40, where N≧2;

[0044] The first tested AC charging pile 50 is connected to the input end of the first interface simulator 10, the output end of the first interface simulator 10 is connected to the input end of the second tested AC charging pile 50, the output end of the M-1 tested AC charging pile 50 is connected to the input end of the M-1 interface simulator, the output end of the M-1 interface simulator 10 is connected to the input end of the M-1 tested AC charging pile 50, the output end of the M tested AC charging pile 50 is connected to the input end of the M interface simulator 10, and the output end of the M interface simulator 10 is connected to the adjustable load 30, wherein M≧2, and M is not greater than N;

[0045] Each of the electric energy error checking devices 20 includes a test meter and a control circuit; the test meter (for example, a CL311V2 three-phase multifunctional standard meter or an XL-803R three-phase standard meter) is connected to the output end of the corresponding interface simulator 10 for detecting power parameters; the control circuit is connected to the corresponding interface simulator 10 for controlling the interface simulator 10;

[0046] The main control machine 40 is connected to each of the electric energy error checking devices 20 , controls the interface simulator 10 through the control circuit, and obtains the error detection result through the test instrument.

[0047] The embodiment of this specification realizes the reuse of the adjustable load 30 by cascading multiple tested AC charging piles 50 with the interface simulator 10; and realizes the measurement and reporting of the error and the control of the interface simulator by the main control machine 50 through the electric energy error verification device 20.

[0048] In one possible implementation, each of the interface simulators 10 includes an interface cabinet 101 and an interface control simulation circuit 102; the interface cabinet 101 is provided with an interface corresponding to the AC charging pile 50 under test; the input end of the interface control simulation circuit 102 is connected to the output end of the interface cabinet 10, and the output end of the interface control simulation circuit 102 is connected to the input end of the AC charging pile 50 under test or the adjustable load 30.

[0049] The interface setting of the interface cabinet 101 complies with the requirements for AC charging vehicle sockets in GB / T20234.1 "Connection device for conductive charging of electric vehicles Part 1: General requirements" and GB / T20234.2 "Connection device for conductive charging of electric vehicles Part 2: AC charging interface". The power pulse port of the interface cabinet 101 is respectively connected to the tested AC charging pile 50 and the power error checking device 20, so that the power error checking device 20 can obtain the first signal for error detection.

[0050] The interface control simulation circuit 102 includes a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, a switch K6, a switch K7, a diode D1, a resistor R2, a resistor R3 and a switch S2, and is used to realize a simulation equivalent resistance simulation function;

[0051] The first end of the switch K1 is connected to the L1 port of the tested AC charging pile 50 through the interface cabinet 10, and the second end of the switch K1 is connected to the L1 port of the tested AC charging pile 50 or the L1 port of the adjustable load. The second end of the switch K1 is provided with a detection point 1 and a detection point 2, and the detection point 1 and the detection point 2 are respectively used to measure the voltage and current of the output end;

[0052] The first end of the switch K2 is connected to the L2 port of the tested AC charging pile 50 through the interface cabinet 10, and the second end of the switch K2 is connected to the L2 port of the tested AC charging pile 50 or the L2 port of the adjustable load. The second end of the switch K2 is provided with a detection point 3 and a detection point 4, which are used to measure the voltage and current of the output end respectively;

[0053] The first end of the switch K3 is connected to the L3 port of the tested AC charging pile 50 through the interface cabinet 10, and the second end of the switch K3 is connected to the L3 port of the tested AC charging pile 50 or the L3 port of the adjustable load. The second end of the switch K3 is provided with a detection point 5 and a detection point 6, which are used to measure the voltage and current of the output end respectively;

[0054] The first end of the switch K4 is connected to the L4 port of the tested AC charging pile 50 through the interface cabinet 10, and the second end of the switch K4 is connected to the L4 port of the tested AC charging pile 50 or the L4 port of the adjustable load. The second end of the switch K3 is provided with a detection point 7 and a detection point 8, and the detection point 7 and the detection point 8 are respectively used to measure the voltage and current of the output end;

[0055] The first end of the switch K5 is connected to the PE port of the tested AC charging pile 50 through the interface cabinet 10;

[0056] The first end of the switch K6 is connected to the CP port of the tested AC charging pile 50 through the interface cabinet 10;

[0057] The switch K7 connects the second end of the switch K5 and the second end of the switch K6;

[0058] The first end of the diode D1 is connected to the second end of the switch K6;

[0059] The first end of the resistor R3 is connected to the second end of the diode D1, the second end of the resistor R3 is connected to the second end of the switch K5, and the adjustment range of the resistor R3 is 1800-4799Ω;

[0060] The first end of the resistor R2 is connected to the second end of the diode D1, the second end of the resistor R2 is connected to the first end of the switch S2, the second end of the switch S2 is connected to the second end of the resistor R3, and the adjustment range of the resistor R2 is 900-1799Ω.

[0061] Preferably, the adjustable load 30 is a programmable AC load. The main control machine 40 is connected to the power error checking device 20 via an RS232 serial port, a network cable or a USB serial port.

[0062] The main control machine 40 can automatically control the closing or opening of the switch of the interface simulator 10 and the adjustment of the size of the resistors R2 and R3 through the control circuit of the power error check device 20, so as to detect the conditions of the AC charging pile under different parameters and quickly perform the detection. The control method can use a variety of related technologies in the prior art, which are not limited here. The main control machine 40 controls the closing or opening of the switch by issuing a control instruction, and then obtains the data measured by the power error check device 20 to complete the analysis and judgment of the test results.

[0063] Please refer to Figure 2 The embodiment of this specification discloses a method for detecting basic errors of electric energy of a multi-meter AC charging pile, which is based on the above-mentioned basic error detection system of electric energy of a multi-meter AC charging pile, and the method comprises the following steps:

[0064] Step 10, the main control machine 40 communicates with the power error checking device 20 and issues a detection instruction;

[0065] Step 20, the electric energy error checking device 20 controls the switch closing and resistance adjustment of the interface simulator 10, and establishes signal transmission with the tested AC charging pile 50 through the interface simulator 10;

[0066] Step 30, the electric energy error checking device 20 collects a first signal from the electric energy pulse port (such as a signal measured from the electric energy pulse port of the interface cabinet 101) and a second signal from the output end of the interface simulator 10 (such as a signal measured from detection points 1-8 of the interface control simulation circuit 102), and obtains a basic error of the electric energy of the charging pile by comparing the error between the first signal and the second signal;

[0067] Step 40, the electric energy error checking device 20 sends the basic error to the main control machine 40;

[0068] Step 50: After receiving the basic error, the host control computer 40 processes the result into a report and displays it on a display device.

[0069] Please refer to Figures 1 to 3 In a specific embodiment, a multi-table AC charging pile power basic error detection system is disclosed, including three interface simulators 10, three power error checking devices 20, an adjustable load 30 and a main control machine 40; each interface simulator 10 and a power error checking device 20 form a set of detection table positions;

[0070] The L1 / L2 / L3 / N port and the PE / CC / CP / power pulse port of the 1# tested AC charging pile 50 are connected to the input end of the first interface simulator 10, and the output end of the first interface simulator 10 is connected to the input end of the second tested AC charging pile 50;

[0071] The L1 / L2 / L3 / N port and the PE / CC / CP / power pulse port of the 2# tested AC charging pile 50 are connected to the input end of the second interface simulator 10, and the output end of the second interface simulator 10 is connected to the input end of the third tested AC charging pile 50;

[0072] The L1 / L2 / L3 / N port and the PE / CC / CP / electric energy pulse port of the 3# tested AC charging pile 50 are connected to the input end of the second interface simulator 10, and the output end of the second interface simulator 10 is connected to the adjustable load 30;

[0073] More tables can be set according to actual detection needs, and the connection relationship is similar. It is only necessary to connect the adjustable load 30 to the output end of the interface simulator 10 at the end to complete the setting of the multi-table AC charging pile power basic error detection system.

[0074] The interface simulator 10 in table 1 includes an interface cabinet 101 and an interface control simulation circuit 102. The interface control simulation circuit 102 has an R2 resistor and an R3 resistor simulation equivalent resistance simulation function. The R2 resistor adjustment range is 900-1799Ω, the resistance is continuously adjustable, and the adjustment accuracy is 1Ω. The R3 equivalent resistance nominal value is 1800-4799Ω, the resistance is continuously adjustable, and the adjustment accuracy is 1Ω. The power error calibration device 20 in table 1 has a built-in high-precision sensor for collecting voltage and current signals (for example, collecting voltage signals from detection points 1, 3, 5, and 7, and collecting current signals from detection points 2, 4, 6, and 8), combined with the synchronous collection of power pulses of 1# AC charging pile 50, to achieve error calibration of 1# AC charging pile 50. Other tables are set in the same way.

[0075] In the actual detection process, if multiple positions are set, but the number of charging piles to be detected is less than the position, that is, when there are M (M < N) AC charging piles to be tested, L1 / L2 / L3 / N of the interface cabinet 101 of the M+1 to N positions are short-circuited with their output terminals L1 / L2 / L3 / N respectively to achieve a closed detection loop. The output terminals PE / CC / CP of the interface control analog circuit 102 in the position N are always connected to the adjustable load to ensure that each AC charging pile 50 under test is tested with load.

[0076] The control system of the multi-meter position AC charging pile power error detection platform runs on the main control machine 40. Taking meter position 1 as an example, the main control machine 40 communicates with the power error verification device 1 in meter position 1 and issues a detection instruction. The power error verification device 1 controls the interface simulator 20 to achieve interaction with the tested AC charging pile 50, and establishes signal transmission or communication with the tested 1# AC charging pile 50; the power error verification device 1 synchronously collects 1# AC power pulses and voltage and current signals, analyzes and calculates the power error, and uploads the error data to the main control machine 40. Other meter positions are designed in the same way.

[0077] The data uploaded by each meter is collected in the main control machine 40, which uniformly displays the power error data and forms a report.

[0078] The embodiments of this specification provide a system and method for detecting basic errors in electric energy of a multi-meter AC charging pile. By cascading the charging piles and multiplexing the loads, it is possible to detect the electric energy errors of multiple charging piles at one time without the need for multiple sets of loads, thus saving time and energy.

[0079] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A multi-meter AC charging pile power basic error detection system, characterized by: It includes N interface simulators, N power error checking devices, an adjustable load and a main control machine, wherein N≧2, and the adjustable load is a programmable AC load; The first tested AC charging pile is connected to the input end of the first interface simulator, the output end of the first interface simulator is connected to the input end of the second tested AC charging pile, the output end of the M-1 tested AC charging pile is connected to the input end of the M-1 interface simulator, the output end of the M-1 interface simulator is connected to the input end of the M tested AC charging pile, the output end of the M tested AC charging pile is connected to the input end of the M interface simulator, and the output end of the M interface simulator is connected to the adjustable load, wherein M≧2, and M is not greater than N; Each of the interface simulators includes an interface cabinet and an interface control simulation circuit; the interface cabinet is provided with an interface corresponding to the AC charging pile under test; the input end of the interface control simulation circuit is connected to the output end of the interface cabinet, and the output end of the interface control simulation circuit is connected to the input end of the AC charging pile under test or the adjustable load; The interface control simulation circuit includes a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, a switch K6, a switch K7, a diode D1, a resistor R2, a resistor R3 and a switch S2, which is used to realize the simulation equivalent resistance simulation function; the first end of the switch K1 is connected to the L1 port of the tested AC charging pile through the interface cabinet, the second end of the switch K1 is connected to the L1 port of the tested AC charging pile or the L1 port of the adjustable load, and the second end of the switch K1 is provided with a detection point 1 and a detection point 2; The first end of the switch K2 is connected to the L2 port of the tested AC charging pile through the interface cabinet, the second end of the switch K2 is connected to the L2 port of the tested AC charging pile or the L2 port of the adjustable load, and the second end of the switch K2 is provided with a detection point 3 and a detection point 4; The first end of the switch K3 is connected to the L3 port of the tested AC charging pile through the interface cabinet, the second end of the switch K3 is connected to the L3 port of the tested AC charging pile or the L3 port of the adjustable load, and the second end of the switch K3 is provided with a detection point 5 and a detection point 6; The first end of the switch K4 is connected to the L4 port of the tested AC charging pile through the interface cabinet, the second end of the switch K4 is connected to the L4 port of the tested AC charging pile or the L4 port of the adjustable load, and the second end of the switch K3 is provided with a detection point 7 and a detection point 8; The first end of the switch K5 is connected to the PE port of the tested AC charging pile through the interface cabinet; The first end of the switch K6 is connected to the CP port of the tested AC charging pile through the interface cabinet; The switch K7 connects the second end of the switch K5 and the second end of the switch K6; The first end of the diode D1 is connected to the second end of the switch K6; The first end of the resistor R3 is connected to the second end of the diode D1, the second end of the resistor R3 is connected to the second end of the switch K5, and the adjustment range of the resistor R3 is 1800-4799Ω; The first end of the resistor R2 is connected to the second end of the diode D1, the second end of the resistor R2 is connected to the first end of the switch S2, the second end of the switch S2 is connected to the second end of the resistor R3, and the adjustment range of the resistor R2 is 900-1799Ω; Each of the electric energy error checking devices comprises a test instrument and a control circuit; The test meter is connected to the output end of the corresponding interface simulator and is used to detect power parameters; The control circuit is connected to the corresponding interface simulator and is used to control the interface simulator; The main control machine is connected to each of the electric energy error checking devices, controls the interface simulator through the control circuit, and obtains the error detection result through the test instrument.

2. A multi-meter AC charging pile electric energy basic error detection system according to claim 1, characterized in that: The main control machine and the electric energy error checking device are connected via an RS232 serial port, a network cable or a USB serial port.

3. A multi-meter AC charging pile power basic error detection method, characterized in that: Based on the multi-meter position AC charging pile electric energy basic error detection system according to any one of claims 1 to 2, the method comprises the following steps: Step 10, the main control machine communicates with the electric energy error checking device and issues a detection instruction; Step 20, the electric energy error checking device controls the switch closing and resistance adjustment of the interface simulator, and establishes signal transmission with the tested AC charging pile through the interface simulator; Step 30, the electric energy error checking device collects a first signal from the electric energy pulse port and a second signal from the output end of the interface simulator, and obtains a basic error of the electric energy of the charging pile by comparing the error between the first signal and the second signal; Step 40: The electric energy error checking device sends the basic error to the main control machine.

4. A multi-meter AC charging pile electric energy basic error detection method according to claim 3, characterized in that: The method further comprises: Step 50: After receiving the basic error, the host control computer processes the result into a report and displays it on a display device.

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