Mining DC power supply electrical performance detection system

Abstract

The invention provides a mining DC power supply electrical performance detection system, and the method comprises the steps: connecting one end of a programmable AC power supply to a PCI bus industrial control computer, and connecting the other end of the programmable AC power supply to the input end of a detected mining DC power supply; the programmable direct-current power supply and the programmable multi-path electronic load are respectively connected with the PCI bus industrial personal computer and the ampere meter; the input end of the ampere meter is connected with the tested mining direct-current power supply, and the output end of the ampere meter is connected with the programmable direct-current power supply, the programmable multi-path electronic load and the PCI bus industrial personal computer; one end of the digital memory oscilloscope is connected between the output end of the tested mining direct-current power supply and the input end of the ampere meter, and the other end of the digital memory oscilloscope is connected to the PCI bus industrial personal computer; one end of the first voltmeter is connected to the PCI bus industrial personal computer, and the other end of the first voltmeter is connected between the output end of the programmable alternating current power supply and the input end of the tested mining direct current power supply. According to the technical scheme provided by the invention, the detection efficiency and precision of the electrical performance of the mining DC power supply are improved.

Description

Technical Field

[0001] The present application relates to the technical field of mine-used DC power supply detection, and in particular to a mine-used DC power supply electrical performance detection system. Background Art

[0002] As the starting point for safe production in underground coal mines, the stable performance of power supplies is directly related to safe production and the safety of underground workers. It is crucial for ensuring the continued stable operation and effectiveness of key systems such as underground communication systems and mine safety monitoring systems. Currently, with nearly 20,000 coal mines and nearly 30,000 non-coal mines in a certain region, the market for mining DC power supplies has become considerable. With the gradual recovery in coal market demand, an increasing number of companies are engaged in the production of mining equipment. Nearly 1,000 products, including flameproof and intrinsically safe DC power supplies for mining, are produced, with nearly 300 certified companies, representing a significant market size.

[0003] Currently, the average overall inspection cycle for the electrical performance of DC power supply products for mining is about 30 days. Due to the weight of power supply products, verification of dimensions and weight, as well as environmental adaptability tests, usually requires the cooperation of 3 to 4 people, who repeatedly carry and inspect samples. Manufacturers and testing centers often use the traditional method of manual testing and result integration, which is inefficient, inaccurate, and easily subject to subjective influence, leading to misjudgment of results. Therefore, it is of great significance to urgently develop an intelligent, high-precision, and intelligent coal mine power supply electrical performance testing system that meets the requirements of coal mine production practices and industry standards. Summary of the Invention

[0004] The present application provides a mining DC power supply electrical performance detection system to at least solve the technical problems of the prior art, such as low efficiency, low precision, susceptibility to subjective influences leading to misjudgment of results, and certain limitations.

[0005] The present application provides a system for detecting the electrical performance of a DC power supply for mining, the system comprising: a PCI bus industrial computer, a programmable AC power supply, a programmable DC power supply, a programmable multi-channel electronic load, a digital memory oscilloscope, a first voltmeter, a second voltmeter, and an ammeter;

[0006] One end of the programmable AC power supply is connected to the PCI bus industrial computer, and the other end is connected to the input end of the DC power supply for the mine under test;

[0007] The programmable DC power supply and the programmable multi-channel electronic load are connected to the PCI bus industrial computer and the ammeter respectively;

[0008] The input end of the ammeter is connected to the measured mining DC power supply, and the output end of the ammeter is connected to the programmable DC power supply, the programmable multi-channel electronic load, and the PCI bus industrial computer;

[0009] One end of the digital memory oscilloscope is connected between the output end of the DC power supply to be tested and the input end of the ammeter, and the other end is connected to the PCI bus industrial computer;

[0010] One end of the first voltmeter is connected to the PCI bus industrial computer, and the other end is connected between the output end of the programmable AC power supply and the input end of the DC power supply to be tested.

[0011] Preferably, the PCI bus industrial computer is used to sequentially control the current values of the programmable multi-channel electronic load to be the first preset load current value and the second preset load current value through Ethernet communication;

[0012] The PCI bus industrial computer is further configured to sequentially control the voltage value output by the programmable AC power supply to a preset minimum value, a nominal value, and a maximum value via RS-485 communication when the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value;

[0013] The first voltmeter is used to measure the voltage values corresponding to the voltage values output by the programmable AC power supply when they are respectively the preset minimum value, the nominal value, and the maximum value, and input the measured voltage values into the PCI bus industrial computer via RS-485 communication;

[0014] The second voltmeter is used to measure the voltage value of the output end of the measured mining DC power supply when the current value of the programmable multi-channel electronic load is the first preset load current value or the second preset load current value, and the voltage value output by the programmable AC power supply is a preset minimum value, a nominal value, and a maximum value, respectively, and input the voltage value into the PCI bus industrial computer via RS-485 communication;

[0015] The PCI bus industrial computer is further used to determine the output open circuit voltage, output voltage deviation value, and minimum output voltage of the tested mining DC power supply based on the voltage value of the output end of the tested mining DC power supply measured by the second voltmeter.

[0016] Furthermore, the PCI bus industrial computer is further configured to control the output voltage of the programmable AC power supply to a preset minimum value, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load to a first preset load current value or a second preset load current value through RS-485 communication;

[0017] The digital memory oscilloscope is used to measure the peak-to-peak value of the tested mining DC power supply when the voltage value output by the programmable AC power supply is a preset minimum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value, and send the peak-to-peak value to the PCI bus industrial computer via USB communication;

[0018] The PCI bus industrial computer is further configured to control the voltage value output by the programmable AC power supply to a preset maximum value, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load to a first preset load current value or a second preset load current value via RS-485 communication.

[0019] The digital memory oscilloscope is further configured to measure the peak-to-peak value of the tested mining DC power supply when the voltage output by the programmable AC power supply is a preset maximum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value, and to send the peak-to-peak value to the PCI bus industrial computer via a USB communication method;

[0020] The PCI bus industrial computer is further used to filter out the maximum value among the peak-to-peak values, and use the maximum value among the peak-to-peak values as the period and random offset value of the tested mining DC power supply.

[0021] Furthermore, the PCI bus industrial computer is further configured to control the load current of the programmable multi-channel electronic load to increase from a small value to a first load current in accordance with a preset first adjustment sequence, wherein the first load current is greater than a rated load current value;

[0022] The ammeter is used to measure the current value of the measured mining DC power supply;

[0023] The PCI bus industrial computer is further configured to use, when the voltage value at the output end of the tested mining DC power supply obtained by the second voltmeter is less than a preset tolerance band, the current value of the tested mining DC power supply measured by the ammeter at this time as a threshold current for overcurrent protection of the tested mining DC power supply;

[0024] The PCI bus industrial computer is further configured to control the load current of the programmable multi-channel electronic load to increase from a first load current to a second load current in sequence according to a preset first adjustment sequence, and use the maximum current value measured by the ammeter as the maximum limit value of the overcurrent protection of the tested mining DC power supply;

[0025] The PCI bus industrial computer is also used to control the output end of the tested DC power supply to be short-circuited, and when the output end of the tested DC power supply is short-circuited, the current value of the tested DC power supply measured by the ammeter is used as the short-circuit current value of the overcurrent protection of the tested DC power supply.

[0026] Furthermore, the PCI bus industrial computer is further configured to adjust the output voltage of the tested mining DC power supply to a rated output voltage, and then sequentially control the output voltage of the tested mining DC power supply to be greater than the rated output voltage based on a preset output voltage control sequence;

[0027] The second voltmeter is further used to measure the voltage value when the voltage output by the tested mining DC power supply is greater than the rated output voltage value, and send the voltage value to the PCI bus industrial computer;

[0028] The PCI bus industrial computer is further used to detect whether overvoltage protection is activated when the output voltage value of the tested mining DC power supply is greater than a preset maximum limit voltage.

[0029] Furthermore, the programmable DC power supply is used to output a voltage to the DC power supply for mining under test, and send the voltage value provided to the DC power supply for mining under test to the PCI bus industrial computer via RS-485 communication;

[0030] The PCI bus industrial computer is further configured to control the output voltage of the programmable AC power supply to a preset minimum value, control the programmable AC power supply to be disconnected from the tested mining DC power supply, and control the programmable DC power supply to start up;

[0031] The digital memory oscilloscope is further used to measure the voltage when the programmable AC power supply is disconnected from the DC power supply for mining under test, and the output current value of the programmable DC power supply, and then send the voltage when the programmable AC power supply is disconnected from the DC power supply for mining under test and the output current value of the programmable DC power supply to the PCI bus industrial computer;

[0032] The PCI bus industrial computer is further configured to determine a conversion time of the tested mining DC power supply based on a voltage when the programmable AC power supply is disconnected from the tested mining DC power supply and an output current value of the programmable DC power supply;

[0033] The PCI bus industrial computer is further configured to determine the operating time of the tested mining DC power supply based on the start time of the programmable DC power supply and the time when the output voltage of the tested mining DC power supply is less than a preset tolerance band;

[0034] The PCI bus industrial computer is also used to control the programmable AC power supply to be connected to the DC power supply for mining under test when the output voltage of the DC power supply for mining under test is zero, and to use the voltage as the maximum charging voltage of the DC power supply for mining under test when the input voltage and output voltage of the DC power supply for mining under test are the same.

[0035] Furthermore, the system further comprises: a display;

[0036] The display is connected to the PCI bus industrial computer, and the display is used to display the data received and sent by the PCI bus industrial computer.

[0037] Furthermore, the system further comprises: a control cabinet;

[0038] The PCI bus industrial computer, programmable AC power supply, programmable DC power supply, programmable multi-channel electronic load, digital memory oscilloscope, first voltmeter, second voltmeter, ammeter and display are all arranged in the control cabinet.

[0039] Furthermore, the PCI bus industrial computer is also used to generate a test report of the tested mining DC power supply.

[0040] Furthermore, when the number of the tested mining DC power supplies is N, the number of the PCI bus industrial computers, programmable AC power supplies, programmable DC power supplies, programmable multi-channel electronic loads, digital memory oscilloscopes, first voltmeters, second voltmeters and ammeters is N.

[0041] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0042] The present application proposes a system for detecting the electrical performance of a DC power supply for a mine, the system comprising: a PCI bus industrial computer, a programmable AC power supply, a programmable DC power supply, a programmable multi-channel electronic load, a digital memory oscilloscope, a first voltmeter, a second voltmeter, and an ammeter; one end of the programmable AC power supply is connected to the PCI bus industrial computer, and the other end is connected to the input end of the DC power supply for a mine to be tested; the programmable DC power supply and the programmable multi-channel electronic load are respectively connected to the PCI bus industrial computer and the ammeter; the input end of the ammeter is connected to the DC power supply for a mine to be tested, and the output end of the ammeter is connected to the programmable DC power supply, the programmable multi-channel electronic load, and the PCI bus industrial computer; one end of the digital memory oscilloscope is connected between the output end of the DC power supply for a mine to be tested and the input end of the ammeter, and the other end is connected to the PCI bus industrial computer; one end of the first voltmeter is connected to the PCI bus industrial computer, and the other end is connected between the output end of the programmable AC power supply and the input end of the DC power supply for a mine to be tested. The technical solution proposed in the present application improves the detection efficiency and accuracy of the electrical performance of the DC power supply for a mine.

[0043] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0045] Figure 1 This is a first structural diagram of a mining DC power supply electrical performance detection system provided according to one embodiment of the present application;

[0046] Figure 2 This is a second structural diagram of a mining DC power supply electrical performance detection system provided according to one embodiment of the present application;

[0047] Reference numerals

[0048] PCI bus industrial computer 1, programmable AC power supply 2, programmable DC power supply 3, programmable multi-channel electronic load 4, digital memory oscilloscope 5, first voltmeter 6, second voltmeter 7, ammeter 8, display 9, control cabinet 10. DETAILED DESCRIPTION

[0049] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0050] The present application proposes a system for detecting the electrical performance of a DC power supply for mining, the system comprising: a PCI bus industrial computer, a programmable AC power supply, a programmable DC power supply, a programmable multi-channel electronic load, a digital memory oscilloscope, a first voltmeter, a second voltmeter, and an ammeter; one end of the programmable AC power supply is connected to the PCI bus industrial computer, and the other end is connected to the input end of the DC power supply for mining under test; the programmable DC power supply and the programmable multi-channel electronic load are respectively connected to the PCI bus industrial computer and the ammeter; the input end of the ammeter is connected to the DC power supply for mining under test, and the output end of the ammeter is connected to the programmable DC power supply, the programmable multi-channel electronic load, and the PCI bus industrial computer; one end of the digital memory oscilloscope is connected between the output end of the DC power supply for mining under test and the input end of the ammeter, and the other end is connected to the PCI bus industrial computer; one end of the first voltmeter is connected to the PCI bus industrial computer, and the other end is connected between the output end of the programmable AC power supply and the input end of the DC power supply for mining under test. The technical solution proposed in the present application improves the detection efficiency and accuracy of the electrical performance of the DC power supply for mining.

[0051] The following describes an electrical performance detection system for a DC power supply for mining according to an embodiment of the present application with reference to the accompanying drawings.

[0052] Example 1

[0053] Figure 1 This is a structural diagram of a mining DC power supply electrical performance detection system provided according to one embodiment of the present application, such as Figure 1 As shown, the system includes: a PCI bus industrial computer 1, a programmable AC power supply 2, a programmable DC power supply 3, a programmable multi-channel electronic load 4, a digital memory oscilloscope 5, a first voltmeter 6, a second voltmeter 7 and an ammeter 8;

[0054] One end of the programmable AC power supply 2 is connected to the PCI bus industrial computer 1, and the other end is connected to the input end of the DC power supply for the mine under test;

[0055] The programmable DC power supply 3 and the programmable multi-channel electronic load 4 are connected to the PCI bus industrial computer 1 and the ammeter 8 respectively;

[0056] The input end of the ammeter 8 is connected to the DC power supply for mining under test, and the output end of the ammeter 8 is connected to the programmable DC power supply 3, the programmable multi-channel electronic load 4, and the PCI bus industrial computer 1;

[0057] One end of the digital memory oscilloscope 5 is connected between the output end of the DC power supply to be tested and the input end of the ammeter 8, and the other end is connected to the PCI bus industrial computer 1;

[0058] One end of the first voltmeter 6 is connected to the PCI bus industrial computer 1, and the other end is connected between the output end of the programmable AC power supply 2 and the input end of the DC power supply to be tested.

[0059] It should be noted that Figure 1 The structure of the electrical performance detection system of the DC power supply for mining provided in the present application is merely a schematic diagram, and does not limit the structure of the electrical performance detection system of the DC power supply for mining provided in the present application.

[0060] In the embodiment of the present disclosure, the PCI bus industrial computer 1 is used to sequentially control the current value of the programmable multi-channel electronic load 4 to be a first preset load current value and a second preset load current value through Ethernet communication;

[0061] The first preset load current value may be zero, and the second preset load current value may be a load current rated value.

[0062] The PCI bus industrial computer 1 is further configured to control the voltage value output by the programmable AC power supply to a preset minimum value, a nominal value, and a maximum value in sequence via RS-485 communication when the current value of the programmable multi-channel electronic load 4 is a first preset load current value or a second preset load current value;

[0063] The first voltmeter 6 is used to measure the voltage values corresponding to the voltage values output by the programmable AC power supply 2 when they are respectively the preset minimum value, the nominal value, and the maximum value, and input the measured voltage values into the PCI bus industrial computer 1 via RS-485 communication;

[0064] The second voltmeter 7 is used to measure the voltage value of the output end of the measured mining DC power supply when the current value of the programmable multi-channel electronic load 4 is the first preset load current value or the second preset load current value, and the voltage value output by the programmable AC power supply 2 is the preset minimum value, nominal value, and maximum value in sequence, and input the voltage value to the PCI bus industrial computer 1 through RS-485 communication;

[0065] The PCI bus industrial computer 1 is further used to determine the output open circuit voltage, output voltage deviation value and minimum output voltage of the tested mining DC power supply according to the voltage value of the output end of the tested mining DC power supply measured by the second voltmeter 7.

[0066] It should be noted that the detection process for the output open-circuit voltage, output voltage deviation value, and minimum output voltage of the mining DC power supply can be as follows:

[0067] A1) Use the PCI bus industrial computer 1 to adjust the load current output by the programmable multi-channel electronic load 4 to zero, and adjust the source voltage output by the programmable AC power supply 2 to the specified minimum value, nominal value, and maximum value, and measure the corresponding stable output voltage U of the tested mining DC power supply. 01 and read out through the second voltmeter 7;

[0068] B1) Using the PCI bus industrial computer 1, adjust the load current output by the programmable multi-channel electronic load 4 to the rated value, and repeat the steps in A1) to perform measurement;

[0069] C1) Take the maximum change of its stable output voltage ΔU0, where ΔU0 is the measured value U of the output voltage of the DC power supply for mining under test 01 With the nominal value U x difference;

[0070] D1) Use PCI bus industrial computer 1 to determine the absolute value of ΔU0 and U x The ratio is the deviation value of the output voltage;

[0071] E1) Using the PCI bus industrial computer 1 to adjust the load current output by the programmable multi-channel electronic load 4 to zero and the source voltage output by the programmable AC power supply 2 to the nominal value, U 01 That is the output open circuit voltage;

[0072] F1) Using the PCI bus industrial computer 1 to adjust the load current output by the programmable multi-channel electronic load 4 to the rated value and the source voltage output by the programmable AC power supply 2 to the nominal value, U 01 That is the minimum output voltage;

[0073] G1) For multiple DC power supplies under test, the outputs of the other outputs should be loaded to zero and rated values at the same time as the output of the tested DC power supply.

[0074] In the embodiment of the present disclosure, the PCI bus industrial computer 1 is further used to control the voltage value output by the programmable AC power supply 2 to a preset minimum value through RS-485 communication, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load 4 to a first preset load current value or a second preset load current value;

[0075] The digital memory oscilloscope 5 is used to measure the peak-to-peak value of the tested mining DC power supply when the voltage value output by the programmable AC power supply is a preset minimum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value, and send the peak-to-peak value to the PCI bus industrial computer via USB communication;

[0076] The PCI bus industrial computer 1 is further configured to control the output voltage of the programmable AC power supply 2 to a preset maximum value through RS-485 communication, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load 4 to a first preset load current value or a second preset load current value;

[0077] The digital memory oscilloscope 5 is further used to measure the peak-to-peak value of the tested mining DC power supply when the voltage value output by the programmable AC power supply 2 is a preset maximum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load 4 is a first preset load current value or a second preset load current value, and send the peak-to-peak value to the PCI bus industrial computer via USB communication;

[0078] The PCI bus industrial computer 1 is further configured to filter out a maximum value among the peak-to-peak values, and use the maximum value among the peak-to-peak values as the period and random offset value of the tested mining DC power supply.

[0079] It should be noted that the detection process for the period and random offset of the mining DC power supply can be as follows:

[0080] A2) using the PCI bus industrial computer 1 to adjust the output voltage of the programmable AC power supply 2 to a preset minimum value, controlling the output voltage of the measured mining DC power supply to a preset output voltage rated value, and then controlling the current value of the programmable multi-channel electronic load 4 to be the rated value and zero value, respectively measuring the peak-to-peak value (PARD) using a digital memory oscilloscope 5, and reading the result to the PCI bus industrial computer 1 via a USB interface;

[0081] B2) Using the PCI bus industrial computer 1, adjust the output voltage of the programmable AC power supply 2 to a preset maximum value, and repeat the test in step A2);

[0082] C2) using the PCI bus industrial computer 1 to obtain the maximum value of the peak-to-peak values, and using the maximum value of the peak-to-peak values as the period and random offset value of the measured mining DC power supply;

[0083] D2) For multiple channels of DC power supply under test, rated and zero loads should be added to the other channels at the same time as the one under test.

[0084] In the embodiment of the present disclosure, the PCI bus industrial computer 1 is further configured to control the load current of the programmable multi-channel electronic load 4 to increase from a small value to a first load current in accordance with a preset first adjustment sequence, wherein the first load current is greater than a rated load current value;

[0085] The ammeter 8 is used to measure the current value of the DC power supply for mining;

[0086] The PCI bus industrial computer 1 is further configured to use the current value of the DC power supply under test measured by the ammeter 8 as the threshold current for overcurrent protection of the DC power supply under test when the voltage value at the output end of the DC power supply under test obtained by the second voltmeter 7 is less than a preset tolerance band;

[0087] The PCI bus industrial computer 1 is further configured to control the load current of the programmable multi-channel electronic load 4 to increase from a first load current to a second load current in accordance with a preset first adjustment sequence, and to use the maximum current value measured by the ammeter 8 as the maximum limit value of the overcurrent protection of the tested mining DC power supply;

[0088] The PCI bus industrial computer 1 is also used to control the output end of the tested DC power supply to be short-circuited, and when the output end of the tested DC power supply is short-circuited, the current value of the tested DC power supply measured by the ammeter 8 is used as the short-circuit current value of the overcurrent protection of the tested DC power supply.

[0089] It should be noted that the overcurrent protection detection process for the mining DC power supply can be as follows:

[0090] A3) using the PCI bus industrial computer 1 to adjust the load current of the programmable multi-channel electronic load 4 so that the load current gradually increases from a small value to a value exceeding the rated value. When the voltage value at the output end of the tested mining DC power supply drops beyond the specified tolerance band for the first time, the current measured by the ammeter 8 at this time is the threshold current of the overcurrent protection;

[0091] B3) Continue to adjust the electronic load to increase the load current. The maximum current value indicated by ammeter 8 is the maximum limit value of the overcurrent protection, and this value is maintained for 1 second.

[0092] C3) Using the PCI bus industrial computer 1, the output terminal of the DC power supply under test is short-circuited. The current flowing through the ammeter 8 at this time is the short-circuit current value of the overcurrent protection. After the short-circuit state is maintained for 2 hours, the DC power supply under test is checked for integrity. After the short-circuit fault is eliminated, the DC power supply under test is checked for reset according to the predetermined method.

[0093] In the embodiment of the present disclosure, the PCI bus industrial computer 1 is further configured to adjust the output voltage value of the tested mining DC power supply to the output voltage rated value, and then sequentially control the output voltage value of the tested mining DC power supply to be greater than the output voltage rated value based on a preset output voltage control sequence;

[0094] The second voltmeter 7 is further used to measure the voltage value when the voltage output by the tested mining DC power supply is greater than the rated output voltage value, and send the voltage value to the PCI bus industrial computer 1;

[0095] The PCI bus industrial computer 1 is further used to detect whether to start overvoltage protection when the output voltage value of the tested mining DC power supply is greater than a preset maximum limit voltage.

[0096] It should be noted that the detection process for overvoltage protection of a mining DC power supply can be as follows:

[0097] A4) using the PCI bus industrial computer 1 to adjust the output voltage of the tested mining DC power supply to the rated output voltage, and load the output overvoltage test point;

[0098] B4) measuring, using a second voltmeter 7, a voltage value when the voltage output by the tested mining DC power supply is greater than the rated output voltage, and sending the voltage value to the PCI bus industrial computer 1;

[0099] C4) using the PCI bus industrial computer 1 to detect whether overvoltage protection is activated when the output voltage value of the tested mining DC power supply is greater than a preset maximum limit voltage;

[0100] D4) Repeat steps A4-D4 five times to determine if overvoltage protection is activated in all five measurements.

[0101] In the embodiment of the present disclosure, the programmable DC power supply 3 is used to output a voltage to the DC power supply for mining under test, and send the voltage value provided to the DC power supply for mining under test to the PCI bus industrial computer 1 via RS-485 communication;

[0102] The PCI bus industrial computer 1 is further used to control the output voltage of the programmable AC power supply 2 to be a preset minimum value, control the programmable AC power supply 2 to be disconnected from the tested mining DC power supply, and control the programmable DC power supply 3 to start;

[0103] The digital memory oscilloscope 5 is further used to measure the voltage when the programmable AC power supply 2 is disconnected from the DC power supply for mining under test, and the output current value of the programmable DC power supply 3, and then send the voltage when the programmable AC power supply 2 is disconnected from the DC power supply for mining under test and the output current value of the programmable DC power supply 3 to the PCI bus industrial computer 1;

[0104] The PCI bus industrial computer 1 is further configured to determine a conversion time of the tested mining DC power supply based on a voltage when the programmable AC power supply 2 is disconnected from the tested mining DC power supply and an output current value of the programmable DC power supply 3;

[0105] The PCI bus industrial computer 1 is further configured to determine the operating time of the tested mining DC power supply based on the start time of the programmable DC power supply 3 and the time when the output voltage of the tested mining DC power supply is less than a preset tolerance band;

[0106] The PCI bus industrial computer 1 is also used to control the programmable AC power supply 2 to be connected to the DC power supply for mining under test when the output voltage of the DC power supply for mining under test is zero, and when the input voltage and output voltage of the DC power supply for mining under test are the same, use the voltage as the maximum charging voltage of the DC power supply for mining under test.

[0107] It should be noted that the detection process for the backup power supply function of the mine DC power supply can be as follows:

[0108] A5) using the PCI bus industrial computer 1 to control the output voltage of the programmable AC power supply 2 to a preset minimum value;

[0109] B5) using the PCI bus industrial computer 1 to control the programmable AC power supply 2 to disconnect from the tested mining DC power supply, and to control the programmable DC power supply 3 to start;

[0110] C5) using a digital memory oscilloscope 5 to measure the voltage when the programmable AC power supply 2 is disconnected from the measured DC power supply for mining, and the output current value of the programmable DC power supply 3, and then sending the voltage when the programmable AC power supply 2 is disconnected from the measured DC power supply for mining and the output current value of the programmable DC power supply 3 to the PCI bus industrial computer 1;

[0111] D5) using the PCI bus industrial computer 1 to measure the time from the time the programmable AC power supply 2 is disconnected to the time the supply current of the programmable DC power supply 3 rises to 0.05 A, which is the conversion time;

[0112] E5) starting from the time the programmable DC power supply 3 is put into operation and continuing until the stable output voltage of the tested mining DC power supply drops beyond the tolerance band or the specified value for the first time, which is the working time;

[0113] F5) The programmable DC power supply 3 continues to discharge. When the output voltage drops to the specified minimum discharge voltage, the output should be zero.

[0114] G5) Turn on the programmable AC power supply 2, and the voltage at both ends of the DC power supply under test after stabilization is the maximum charging voltage.

[0115] In the embodiment of the present disclosure, Figure 2 As shown, the system further includes: a display 9;

[0116] The display 9 is connected to the PCI bus industrial computer 1 , and the display 9 is used to display the data received and sent by the PCI bus industrial computer 1 .

[0117] Further, such as Figure 2 As shown, the system further includes: a control cabinet 10;

[0118] The PCI bus industrial computer 1, programmable AC power supply 2, programmable DC power supply 3, programmable multi-channel electronic load 4, digital memory oscilloscope 5, first voltmeter 6, second voltmeter 7, ammeter 8, and display 9 are all arranged in the control cabinet 10.

[0119] Furthermore, the PCI bus industrial computer 1 is also used to generate a test report of the tested mining DC power supply.

[0120] It should be noted that when the number of the tested mining DC power supplies is N, the number of the PCI bus industrial computer 1, the programmable AC power supply 2, the programmable DC power supply 3, the programmable multi-channel electronic load 4, the digital memory oscilloscope 5, the first voltmeter 6, the second voltmeter 7 and the ammeter 8 are all N.

[0121] In summary, the electrical performance detection system for a mine-used DC power supply proposed in this embodiment improves the detection efficiency and accuracy of the electrical performance of a mine-used DC power supply.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0123] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0124] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A DC power supply electrical performance detection system for mines, characterized in that: The system includes: a PCI bus industrial computer, a programmable AC power supply, a programmable DC power supply, a programmable multi-channel electronic load, a digital memory oscilloscope, a first voltmeter, a second voltmeter and an ammeter; One end of the programmable AC power supply is connected to the PCI bus industrial computer, and the other end is connected to the input end of the DC power supply for the mine under test; The programmable DC power supply and the programmable multi-channel electronic load are connected to the PCI bus industrial computer and the ammeter respectively; The input end of the ammeter is connected to the measured mining DC power supply, and the output end of the ammeter is connected to the programmable DC power supply, the programmable multi-channel electronic load, and the PCI bus industrial computer; One end of the digital memory oscilloscope is connected between the output end of the DC power supply to be tested and the input end of the ammeter, and the other end is connected to the PCI bus industrial computer; One end of the first voltmeter is connected to the PCI bus industrial computer, and the other end is connected between the output end of the programmable AC power supply and the input end of the DC power supply to be tested.

2. The system according to claim 1, wherein The PCI bus industrial computer is used to sequentially control the current values of the programmable multi-channel electronic loads to be a first preset load current value and a second preset load current value through Ethernet communication; The PCI bus industrial computer is further configured to sequentially control the voltage value output by the programmable AC power supply to a preset minimum value, a nominal value, and a maximum value via RS-485 communication when the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value; The first voltmeter is used to measure the voltage values corresponding to the voltage values output by the programmable AC power supply when they are respectively the preset minimum value, the nominal value, and the maximum value, and input the measured voltage values into the PCI bus industrial computer via RS-485 communication; The second voltmeter is used to measure the voltage value of the output end of the measured mining DC power supply when the current value of the programmable multi-channel electronic load is the first preset load current value or the second preset load current value, and the voltage value output by the programmable AC power supply is a preset minimum value, a nominal value, and a maximum value, respectively, and input the voltage value into the PCI bus industrial computer via RS-485 communication; The PCI bus industrial computer is further used to determine the output open circuit voltage, output voltage deviation value, and minimum output voltage of the tested mining DC power supply based on the voltage value of the output end of the tested mining DC power supply measured by the second voltmeter.

3. The system according to claim 2, wherein: The PCI bus industrial computer is further configured to control the voltage output by the programmable AC power supply to a preset minimum value, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load to a first preset load current value or a second preset load current value via RS-485 communication. The digital memory oscilloscope is used to measure the peak-to-peak value of the tested mining DC power supply when the voltage value output by the programmable AC power supply is a preset minimum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value, and send the peak-to-peak value to the PCI bus industrial computer via USB communication; The PCI bus industrial computer is further configured to control the voltage value output by the programmable AC power supply to a preset maximum value, control the output voltage of the tested mining DC power supply to a preset output voltage rated value, and then control the current value of the programmable multi-channel electronic load to a first preset load current value or a second preset load current value via RS-485 communication. The digital memory oscilloscope is further configured to measure the peak-to-peak value of the tested mining DC power supply when the voltage output by the programmable AC power supply is a preset maximum value, the output voltage of the tested mining DC power supply is a preset output voltage rated value, and the current value of the programmable multi-channel electronic load is a first preset load current value or a second preset load current value, and to send the peak-to-peak value to the PCI bus industrial computer via a USB communication method; The PCI bus industrial computer is further used to filter out the maximum value among the peak-to-peak values, and use the maximum value among the peak-to-peak values as the period and random offset value of the tested mining DC power supply.

4. The system according to claim 3, characterized in that The PCI bus industrial computer is further configured to control the load current of the programmable multi-channel electronic load to increase from a small value to a first load current in accordance with a preset first adjustment sequence, wherein the first load current is greater than a rated load current value; The ammeter is used to measure the current value of the measured mining DC power supply; The PCI bus industrial computer is further configured to use, when the voltage value at the output end of the tested mining DC power supply obtained by the second voltmeter is less than a preset tolerance band, the current value of the tested mining DC power supply measured by the ammeter at this time as a threshold current for overcurrent protection of the tested mining DC power supply; The PCI bus industrial computer is further configured to control the load current of the programmable multi-channel electronic load to increase from a first load current to a second load current in sequence according to a preset first adjustment sequence, and use the maximum current value measured by the ammeter as the maximum limit value of the overcurrent protection of the tested mining DC power supply; The PCI bus industrial computer is also used to control the output end of the tested DC power supply to be short-circuited, and when the output end of the tested DC power supply is short-circuited, the current value of the tested DC power supply measured by the ammeter is used as the short-circuit current value of the overcurrent protection of the tested DC power supply.

5. The system according to claim 4, wherein: The PCI bus industrial computer is further configured to adjust the output voltage of the tested mining DC power supply to a rated output voltage, and then sequentially control the output voltage of the tested mining DC power supply to be greater than the rated output voltage based on a preset output voltage control sequence; The second voltmeter is further used to measure the voltage value when the voltage output by the tested mining DC power supply is greater than the rated output voltage value, and send the voltage value to the PCI bus industrial computer; The PCI bus industrial computer is further used to detect whether overvoltage protection is activated when the output voltage value of the tested mining DC power supply is greater than a preset maximum limit voltage.

6. The system according to claim 5, wherein: The programmable DC power supply is used to output a voltage to the DC power supply for mining under test, and send the voltage value provided to the DC power supply for mining under test to the PCI bus industrial computer via RS-485 communication; The PCI bus industrial computer is further configured to control the output voltage of the programmable AC power supply to a preset minimum value, control the programmable AC power supply to be disconnected from the tested mining DC power supply, and control the programmable DC power supply to start up; The digital memory oscilloscope is further used to measure the voltage when the programmable AC power supply is disconnected from the DC power supply for mining under test, and the output current value of the programmable DC power supply, and then send the voltage when the programmable AC power supply is disconnected from the DC power supply for mining under test and the output current value of the programmable DC power supply to the PCI bus industrial computer; The PCI bus industrial computer is further configured to determine a conversion time of the tested mining DC power supply based on a voltage when the programmable AC power supply is disconnected from the tested mining DC power supply and an output current value of the programmable DC power supply; The PCI bus industrial computer is further configured to determine the operating time of the tested mining DC power supply based on the start time of the programmable DC power supply and the time when the output voltage of the tested mining DC power supply is less than a preset tolerance band; The PCI bus industrial computer is also used to control the programmable AC power supply to be connected to the DC power supply for mining under test when the output voltage of the DC power supply for mining under test is zero, and to use the voltage as the maximum charging voltage of the DC power supply for mining under test when the input voltage and output voltage of the DC power supply for mining under test are the same.

7. The system according to claim 6, wherein: The system further includes: a display; The display is connected to the PCI bus industrial computer, and the display is used to display the data received and sent by the PCI bus industrial computer.

8. The system according to claim 7, wherein: The system further comprises: a control cabinet; The PCI bus industrial computer, programmable AC power supply, programmable DC power supply, programmable multi-channel electronic load, digital memory oscilloscope, first voltmeter, second voltmeter, ammeter and display are all arranged in the control cabinet.

9. The system according to claim 8, wherein The PCI bus industrial computer is also used to generate a test report of the tested mining DC power supply.

10. The system according to claim 9, wherein: When the number of the tested mining DC power supplies is N, the number of the PCI bus industrial computers, programmable AC power supplies, programmable DC power supplies, programmable multi-channel electronic loads, digital memory oscilloscopes, first voltmeters, second voltmeters and ammeters are all N.

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