Maintenance-free high-frequency switching power supply cabinet

Abstract

The utility model relates to a maintenance-free high-frequency switching power supply cabinet. An active test device is electrically connected with a two-way alternating current input bus, an alternating current switching device, a rectifier module, a direct current bus, a storage battery pack, a direct current distribution screen cabinet and a grounding resistance conduction device; the two-way alternating current input bus, the alternating current switching device, the rectifier module, the direct current bus, the storage battery pack, the direct current distribution screen cabinet and the grounding resistor conduction device are electrically connected in sequence; the active test device integrates and identifies the collected voltage data, current data, internal resistance data and displacement state values, and uniformly packages and transmits the data to the remote centralized management and control server, and related operators do not need to go to a maintenance site. The maintenance-free high-frequency switching power supply cabinet can complete system overall state detection, an alternating current switching test, a storage battery check discharge test and a grounding on-resistance test, the detection efficiency and convenience are improved, the safety of detection personnel is ensured, fault hidden dangers are handled in time, and it is ensured that the maintenance-free high-frequency switching power supply cabinet can supply power stably and continuously.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication power distribution cabinet test technical field especially relates to a maintenance -free high frequency switching power supply cabinet. BACKGROUND

[0002] High frequency switching power supply cabinet is a kind of communication power supply equipment, is equipped with the 380V three-phase ac input power supply through rectifier conversion for-48V DC power supply, and has battery pack as backup DC power supply, and it is suitable for the uninterrupted power supply of various equipment in general communication room, high frequency switching power supply generally consists of cabinet, ac input and switching device, monitoring module, rectifier module, battery input terminal etc.

[0003] At present, due to the particularity of communication equipment power supply, high frequency switching power supply cabinet is needed for uninterrupted power supply for communication equipment, but there are the following problems and shortcomings:

[0004] 1, AC switching test is inconvenient: to ensure the reliability of high frequency switching power supply AC input power supply, two-way AC input disconnection and recovery test need to be carried out regularly according to the requirements of communication power operation and maintenance procedures, which needs manual operation on site, when the number of high frequency switching power supply being maintained at the same time increases, it is impossible to complete the AC switching test of all high frequency switching power supply in time, and the reliability of high frequency switching power supply cannot be guaranteed.

[0005] 2, battery check discharge is inconvenient: to ensure the reliability of high frequency switching power supply backup power supply, find potential problems of battery in time, and investigate and treat battery hazards in time, battery needs to be discharged regularly according to the requirements of communication power operation and maintenance procedures, which needs manual operation on site, when the number of batteries being maintained at the same time increases, it is impossible to complete the check discharge test of all batteries in time, potential hazards cannot be found in time, and temporary battery pack will be connected before manual test, and disconnection operation will be carried out at high frequency switching power supply, which has the risk of misoperation, may cause damage to high frequency switching power supply, communication equipment power supply interruption, and further cause accident, and the maintenance safety is poor.

[0006] 3, ground conduction resistance test is inconvenient: to prevent high frequency switching power supply from causing failure due to grounding problem, investigate and treat grounding problem hazards in time, high frequency switching power supply needs to be grounded resistance conduction test before thunderstorm season according to the requirements of communication power operation and maintenance procedures, which needs manual operation on site, when the number of high frequency switching power supply being maintained at the same time increases, it is impossible to complete the grounding conduction resistance test of all high frequency switching power supply in time, and the reliability of high frequency switching power supply cannot be guaranteed.

[0007] 4. Safety problem: when maintaining the high-frequency switching power supply according to the communication power operation regulation, the high-frequency switching power supply will be disconnected and switched, which has the risk of misoperation or short circuit, and may cause damage to the high-frequency switching power supply, interruption of communication equipment power supply, and further accidents, and the maintenance safety is poor. SUMMARY

[0008] Therefore, it is necessary to provide a maintenance-free high-frequency switching power supply cabinet to solve the technical problems of inconvenient AC switching test, inconvenient battery check discharge, inconvenient ground resistance test and poor safety in the scene of simultaneously maintaining multiple high-frequency switching power supplies.

[0009] A maintenance-free high-frequency switching power supply cabinet, comprising a double-way AC input bus, an AC switching device, a rectifier module, a DC bus, a battery pack, a DC distribution screen cabinet, a ground resistance conduction device, and an active testing device, wherein the active testing device is electrically connected with the double-way AC input bus, the AC switching device, the rectifier module, the DC bus, the battery pack, the DC distribution screen cabinet, and the ground resistance conduction device, and the double-way AC input bus, the AC switching device, the rectifier module, the DC bus, the battery pack, the DC distribution screen cabinet, and the ground resistance conduction device are electrically connected in sequence.

[0010] The active testing device collects the voltage of the double-way AC input bus to generate a corresponding first voltage value, collects the DC 48V voltage and current output by the rectifier module to generate a corresponding second voltage value and first current value, collects the total output 48V voltage and current of the DC bus to generate a corresponding third voltage value and second current value, collects the voltage and current of the battery pack to generate a corresponding fourth voltage value and third current value, and collects the total input voltage and current of the DC distribution screen cabinet to generate a corresponding fifth voltage value and fourth current value.

[0011] The active testing device also collects the voltage of the double-way AC input bus on the AC switching device to generate a corresponding sixth voltage value, collects the voltage output by the AC switching device to generate a corresponding seventh voltage value, collects the voltage and internal resistance of the battery pack to generate a corresponding eighth voltage value and first internal resistance value, controls one of the double-way input buses to be disconnected to generate a corresponding displacement state value, collects the voltage of the double-way AC input bus at the input end of the AC switching device to generate a corresponding ninth voltage value, and collects the voltage at the output end of the AC switching device to generate a corresponding tenth voltage value.

[0012] The active testing device also collects the total voltage of the battery pack and generates a corresponding eleventh voltage value, collects the current of the total cable output by the battery pack and generates a corresponding fifth current value, and performs a voltage boosting operation on the battery pack according to the set test parameters, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet, and the power supply state is changed from the rectifier module to the DC distribution screen cabinet to the battery pack to the DC distribution screen cabinet, and the capacity test is started. The active testing device records the voltage, current and internal resistance of the battery pack during the capacity test in a timely manner and generates corresponding twelfth voltage value, sixth current value and second internal resistance value. After the capacity test is completed, the active testing device performs a voltage reducing operation on the battery pack to restore the total output voltage of the battery pack to that before the capacity test.

[0013] The active testing device is electrically connected with the grounding resistance conduction device, regularly measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet, and generates a corresponding third internal resistance value.

[0014] The active testing device provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value, the eleventh voltage value and the twelfth voltage value as voltage data to the remote centralized management server, provides the first current value, the second current value, the third current value, the fourth current value, the fifth current value and the sixth current value as current data to the remote centralized management server, and provides the first internal resistance value, the second internal resistance value and the third internal resistance value as internal resistance data and displacement state value to the remote centralized management server.

[0015] Preferably, the active testing device comprises a system overall state acquisition module, an alternating current switching module, a battery inspection and capacity test module, a grounding resistance conduction detection module and a monitoring and communication module, wherein the monitoring and communication module is electrically connected with the system overall state acquisition module, the alternating current switching module, the battery inspection and capacity test module and the grounding resistance conduction detection module.

[0016] The system overall state acquisition module is electrically connected with the double-path AC input bus, acquires the voltage of the double-path AC input bus, generates a corresponding first voltage value, the system overall state acquisition module is electrically connected with the rectifier module, acquires the DC 48V voltage and current output by the rectifier module, and generates corresponding second voltage value and first current value, the system overall state acquisition module is electrically connected with the DC bus, acquires the overall output 48V voltage and current of the DC bus, and generates corresponding third voltage value and second current value, the system overall state acquisition module is electrically connected with the battery pack, acquires the voltage, current and internal resistance of the overall battery pack, and generates corresponding fourth voltage value, eighth voltage value, third current value and first internal resistance value, the system overall state acquisition module is electrically connected with the DC distribution screen cabinet, acquires the total input voltage and current of the DC distribution screen cabinet, and generates corresponding fifth voltage value and fourth current value;

[0017] The AC switching module is electrically connected with the double-path AC input bus, acquires the voltage of the double-path AC input bus, generates a corresponding sixth voltage value, the AC switching module is electrically connected with the AC switching device, acquires the voltage output by the AC switching device, generates a corresponding seventh voltage value, the AC switching module controls one of the double-path AC input bus to be disconnected to generate a displacement state, and generates a corresponding displacement state value, at the same time, the AC switching module acquires the voltage of the double-path AC input bus at the input end of the AC switching device, generates a corresponding ninth voltage, and also acquires the voltage at the output end of the AC switching device, generates a corresponding tenth voltage value;

[0018] The battery inspection and capacity verification module is electrically connected with the battery pack, acquires the total voltage of the battery pack, and generates a corresponding eleventh voltage value, the battery inspection and capacity verification module is electrically connected with the total cable output by the battery pack, acquires the current of the total cable output by the battery pack, and generates a corresponding fifth current value, the battery inspection and capacity verification module performs a boosting operation on the battery pack according to the set test parameters, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet, the power supply state is changed from power supply from the rectifier module to the DC distribution screen cabinet to power supply from the battery pack to the DC distribution screen cabinet, the capacity verification test is started, and the voltage, current and internal resistance of the battery pack during the capacity verification test are recorded at regular time intervals, and corresponding twelfth voltage value, sixth current value and second internal resistance value are generated, after the capacity verification test is completed, the active test device performs a step-down operation on the battery pack, so that the battery pack returns to the total output voltage before the capacity verification test;

[0019] The ground resistance conduction detection module is electrically connected with the ground resistance conduction device, periodically measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet, and generates a corresponding third internal resistance value;

[0020] The monitoring and communication module provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value, and the eleventh voltage value as voltage data to the remote centralized management server, provides the first current value, the second current value, the third current value, the fourth current value, and the fifth current value as current data to the remote centralized management server, and provides the first internal resistance value, the second internal resistance value, and the third internal resistance value as internal resistance data and the displacement state value to the remote centralized management server.

[0021] Preferably, the system overall state acquisition module includes an alternating current power input acquisition unit, a rectifier output acquisition unit, a direct current output busbar acquisition unit, a storage battery backup power acquisition unit, and a load direct current input busbar acquisition unit.

[0022] The alternating current power input acquisition unit is electrically connected with the double-path alternating current input busbar, acquires the voltage of the double-path alternating current input busbar, generates a corresponding first voltage value, the rectifier output acquisition unit is electrically connected with the rectifier module, acquires the direct current 48V voltage and current output by the rectifier module, and generates corresponding second voltage value and first current value, the direct current output busbar acquisition unit is electrically connected with the direct current busbar, acquires the overall output 48V voltage and current of the direct current busbar, and generates corresponding third voltage value and second current value, the storage battery backup power acquisition unit is electrically connected with the storage battery group, acquires the overall voltage, current, and internal resistance of the storage battery group, and generates corresponding fourth voltage value, eighth voltage value, third current value, and first internal resistance value, and the load direct current input busbar acquisition unit is electrically connected with the direct current distribution screen cabinet, acquires the total input voltage and current of the direct current distribution screen cabinet, and generates corresponding fifth voltage value and fourth current value.

[0023] Preferably, the alternating current switching module includes a superior side double-path alternating current power input acquisition unit, an alternating current input contactor control unit, and an alternating current busbar acquisition unit.

[0024] The superior side double-path alternating current power input acquisition unit is electrically connected with the double-path alternating current input busbar, acquires the voltage of the double-path alternating current input busbar, generates a corresponding sixth voltage value, the alternating current busbar acquisition unit is electrically connected with the output end of the alternating current switching device, acquires the voltage output by the alternating current switching device, generates a corresponding seventh voltage value, the alternating current input contactor control unit is electrically connected with the alternating current switching device to control one of the double-path input busbars to be disconnected, and generates a displacement state value, at the same time, the superior side double-path alternating current power input acquisition unit acquires the voltage of the double-path alternating current input busbar at the input end of the alternating current switching device, generates a corresponding ninth voltage value, and the alternating current busbar acquisition unit acquires the voltage at the output end of the alternating current switching device, and generates a corresponding tenth voltage value.

[0025] Preferably, the battery inspection and capacity test module comprises a single battery inspection unit and a capacity test unit, the single battery inspection unit is electrically connected with the battery pack to collect the total voltage of the battery pack and generate a corresponding eleventh voltage value, the single battery inspection unit is electrically connected with the total cable output by the battery pack to collect the current of the total cable output by the battery pack and generate a corresponding fifth current value, the capacity test unit is electrically connected with the battery pack to perform a boosting operation on the battery pack according to the set test parameters, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet, the power supply state is changed from the power supply of the rectifier module to the DC distribution screen cabinet to the power supply of the battery pack to the DC distribution screen cabinet, the capacity test is started, the single battery inspection unit records the voltage, current and internal resistance of the battery pack during the capacity test at regular time intervals, and generates a corresponding twelfth voltage value, sixth current value and second internal resistance value, and after the capacity test is completed, the capacity test unit performs a step-down operation on the battery pack to restore the total output voltage of the battery pack to that before the capacity test.

[0026] Preferably, the ground resistance conduction detection module comprises a conduction resistance collection unit, the conduction resistance collection unit is electrically connected with the ground resistance conduction device to periodically measure the conduction resistance of the maintenance-free high-frequency switching power supply cabinet and generate a corresponding third internal resistance value.

[0027] Preferably, the monitoring and communication module comprises a system overall state receiving unit, an AC switching state data receiving unit, a battery state data receiving unit, a ground conduction resistance data receiving unit, a data recording unit, a data integration unit and a communication unit.

[0028] The system overall state receiving unit is electrically connected with the system overall state collection module to receive the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the eighth voltage value, the first current value, the second current value, the third current value, the fourth current value and the first internal resistance value, the AC switching state data receiving unit is electrically connected with the AC switching module to receive the sixth voltage value, the seventh voltage value, the ninth voltage value, the tenth voltage value and the displacement state value, the battery state data receiving unit is electrically connected with the battery inspection and capacity test module to receive the eleventh voltage value, the twelfth voltage value, the fifth current value, the sixth current value and the second internal resistance value, and the ground conduction resistance data receiving unit is electrically connected with the ground resistance conduction detection module to receive the third internal resistance value.

[0029] The data recording unit stores and records voltage data, current data, internal resistance data, and displacement status values ​​received by the system overall status receiving unit, AC switching status data receiving unit, battery status data receiving unit, and grounding continuity resistance data receiving unit. The data integration unit sets the site identifier and device identifier of the voltage data, current data, and internal resistance data, as well as protocol conversion and docking. The communication unit transmits the communication data generated by the integration unit to the remote centralized management and control server.

[0030] The aforementioned maintenance-free high-frequency switching power supply cabinet, through its active detection device's system overall status acquisition module, AC switching module, battery inspection and capacity verification module, grounding resistance continuity detection module, and monitoring and communication module, can comprehensively monitor the overall operation of the communication high-frequency switching power supply cabinet. Specifically: the system overall status acquisition module acquires the first, second, third, fourth, fifth, and eighth voltage values, the first, second, third, and fourth current values, and the first internal resistance value; the AC switching module acquires the sixth, seventh, ninth, and tenth voltage values, as well as the change status value; the battery inspection and capacity verification module acquires and receives the tenth, eleventh, and twelfth voltage values, the fifth current value, the sixth current value, and the second internal resistance value; and so on. The ground resistance continuity detection module collects the third internal resistance value. The monitoring and communication module integrates and identifies the voltage, current, internal resistance, and displacement status values ​​collected by the system overall status acquisition module, AC switching module, battery inspection and capacity verification module, and ground resistance continuity detection module, and transmits them in a unified packet to the remote centralized management server. Relevant operators do not need to go to the maintenance site. The maintenance-free high-frequency switching power supply cabinet can complete AC switching tests, battery verification discharge tests, and ground resistance continuity tests, which improves the safety of the tests. Moreover, relevant operators can understand the voltage, current, internal resistance, and displacement status values ​​of the maintenance-free high-frequency switching power supply cabinet at the remote centralized management server, and deal with potential faults in a timely manner based on the data, ensuring that the maintenance-free high-frequency switching power supply cabinet can provide stable and continuous power supply. Attached Figure Description

[0031] Figure 1 is a functional block diagram of a maintenance-free high-frequency switching power supply cabinet according to a preferred embodiment.

[0032] Appendix Figure 2 This is a schematic diagram of a maintenance-free high-frequency switching power supply cabinet.

[0033] Appendix Figure 3 It is attached Figure 1 Working status diagram of the overall system status acquisition module.

[0034] Appendix Figure 4 It is attached Figure 1 Diagram showing the working status of the communication switching module.

[0035] attached Figure 5 is attached Figure 1 Figure 2 is a working state diagram of the battery inspection and capacity checking module.

[0036] attached Figure 6 is attached Figure 1 Figure 3 is a working state diagram of the grounding resistance conduction measurement module.

[0037] attached Figure 7 is attached Figure 1 Figure 4 is a working state diagram of the monitoring and communication module.

[0038] In the figure: the cabinet 1 of the maintenance-free high-frequency switching power supply, the double-way AC input bus 11, the AC switching device 12, the rectifier module 13, the DC bus 14, the battery group 15, the DC distribution screen cabinet 16, the grounding resistance conduction device 17, the active testing device 18, the system overall state acquisition module 181, the AC switching module 182, the battery inspection and capacity checking module 183, the grounding resistance conduction detection module 184, the monitoring and communication module 185, the AC power supply input acquisition unit 1811, the rectifier output acquisition unit 1812, the DC output bus acquisition unit 1813, the battery group backup power supply acquisition unit 1814, the load DC input bus acquisition unit 1815, the upper side double-way AC power supply input acquisition unit 1821, the AC input contactor control unit 1822, the AC bus acquisition unit 1823, the commonly used way AC input bus 111, the backup way AC input bus 112, the commonly used way air switch 113, the backup way air switch 114, the commonly used way contactor 121, the backup way contactor 122, the ATS AC switching device 123, the AC bus 124, the capacity checking unit 1831, the single battery inspection unit 1832, the DC / DC capacity checking and charging group 18311, the normally closed contact 18312, the normally open contact 18313, the conduction resistance acquisition unit 1841, the conduction resistance measuring instrument 171, the high-frequency switching high-frequency switching power supply cabinet internal grounding bus 172, the DC distribution screen cabinet internal grounding bus 173, the machine room potential grounding point 174, the system overall state receiving unit 1851, the AC switching state data receiving unit 1852, the battery state data receiving unit 1853, the grounding conduction resistance data receiving unit 1854, the data recording unit 1855, the data integration unit 1856, the communication unit 1857. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application.

[0040] As Figures 1-2 shown, a kind of maintenance-free high-frequency switching power supply cabinet 1 includes double-way AC input bus 11, AC switching device 12, rectifier module 13, DC bus 14, battery pack 15, DC distribution screen cabinet 16, grounding resistance conduction device 17, active testing device 18, active testing device 18 with double-way AC input bus 11, AC switching device 12, rectifier module 13, DC bus 14, battery pack 15, DC distribution screen cabinet 16, grounding resistance conduction device 17 electrically connected, double-way AC input bus 11, AC switching device 12, rectifier module 13, DC bus 14, battery pack 15, DC distribution screen cabinet 16, grounding resistance conduction device 17 are electrically connected in turn;

[0041] The active testing device 18 is used for the voltage of double-way AC input bus 11, generates corresponding first voltage value, the active testing device 18 collects the DC 48V voltage, current of rectifier module 13 output, and generates corresponding second voltage value, first current value, the active testing device 18 collects the total output 48V voltage, current of DC bus 14, and generates corresponding third voltage value, second current value, the active testing device 18 collects the voltage, current of battery pack 15 total, and generates corresponding fourth voltage value, third current value, the active testing device 18 collects the total input voltage, current of DC distribution screen cabinet 16, and generates corresponding fifth voltage value, fourth current value;

[0042] The active testing device 18 is also used for collecting the voltage of double-way AC input bus 11 on AC switching device 12, generates corresponding sixth voltage value, the active testing device 18 collects the voltage of AC switching device 12 output, and generates corresponding seventh voltage value, the active testing device 18 collects the voltage, internal resistance of battery pack 15, and generates corresponding eighth voltage value, first internal resistance value, the active testing device 18 is also controlled and generates displacement state value, while the active testing device 18 collects the voltage of double-way AC input bus 11 in AC switching device 12 input end, generates corresponding ninth voltage, also collects the voltage of AC switching device 12 output end, and generates corresponding tenth voltage value, disconnects one of double-way input bus 11;

[0043] The active testing device 18 also collects the total voltage of the battery pack 15 and generates a corresponding eleventh voltage value, collects the current of the total cable output by the battery pack 15 and generates a corresponding fifth current value, and according to the set test parameters, performs a voltage boosting operation on the battery pack 15 to make the total output voltage of the battery pack 15 exceed the output voltage of the rectifier module 13 to the DC distribution cabinet 16, so that the power supply state changes from the rectifier module 13 to the DC distribution cabinet 16 to the battery pack 15 to the DC distribution cabinet 16, starts the capacity test, and records the voltage, current and internal resistance of the battery pack 15 during the capacity test, and generates corresponding twelfth voltage value, sixth current value and second internal resistance value. After the capacity test is completed, the active testing device 18 performs a voltage reduction operation on the battery pack 15 to restore the total output voltage of the battery pack 15 before the capacity test;

[0044] The active testing device 18 is electrically connected with the grounding resistance conduction device 17, regularly measures the conduction resistance of the internal grounding bus of the maintenance-free high-frequency switching power supply cabinet 1, and generates a corresponding third internal resistance value;

[0045] The active testing device 18 provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value, the eleventh voltage value, and the twelfth voltage value as voltage data to the remote centralized management server, the first current value, the second current value, the third current value, the fourth current value, the fifth current value, and the sixth current value as current data to the remote centralized management server, and the first internal resistance value, the second internal resistance value, and the third internal resistance value as internal resistance data and displacement state value to the remote centralized management server.

[0046] The active testing device 18 includes a system overall state acquisition module 181, an alternating current switching module 182, a battery inspection and capacity test module 183, a grounding resistance conduction detection module 184, and a monitoring and communication module 185, wherein the monitoring and communication module 185 is electrically connected with the system overall state acquisition module 181, the alternating current switching module 182, the battery inspection and capacity test module 183, and the grounding resistance conduction detection module 184;

[0047] The system overall state acquisition module 181 is electrically connected with the double-way AC input bus 11, acquires the voltage of the double-way AC input bus, generates a corresponding first voltage value, the system overall state acquisition module 181 is electrically connected with the rectifier module 13, acquires the DC 48V voltage and current output by the rectifier module 13, and generates a corresponding second voltage value and first current value, the system overall state acquisition module 181 is electrically connected with the DC bus 14, acquires the overall output 48V voltage and current of the DC bus 14, and generates a corresponding third voltage value and second current value, the system overall state acquisition module 181 is electrically connected with the battery pack 15, acquires the overall voltage, current and internal resistance of the battery pack 15, and generates a corresponding fourth voltage value, eighth voltage value, third current value and first internal resistance value, the system overall state acquisition module 181 is electrically connected with the DC distribution cabinet 16, acquires the total input voltage and current of the DC distribution cabinet 16, and generates a corresponding fifth voltage value and fourth current value;

[0048] The AC switching module 182 is electrically connected with the double-way AC input bus 11, acquires the voltage of the double-way AC input bus 11, generates a corresponding sixth voltage value, the AC switching module 182 is electrically connected with the AC switching device 12, acquires the voltage output by the AC switching device 12, generates a corresponding seventh voltage value, the AC switching module 182 controls one of the double-way AC input bus 11 to be disconnected to generate a displacement state, and generates a corresponding displacement state value, at the same time, the AC switching module 182 acquires the voltage of the double-way AC input bus 11 at the input end of the AC switching device 12, and generates a corresponding ninth voltage, and also acquires the voltage at the output end of the AC switching device 12, and generates a corresponding tenth voltage value;

[0049] The battery inspection and capacity verification module 183 is electrically connected with the battery pack 15, acquires the total voltage of the battery pack 15, and generates a corresponding eleventh voltage value, the battery inspection and capacity verification module 183 is electrically connected with the total cable output by the battery pack 15, acquires the current of the total cable output by the battery pack 15, and generates a corresponding fifth current value, the battery inspection and capacity verification module 183 performs a boosting operation on the battery pack 15 according to the set test parameters, so that the total output voltage of the battery pack 15 exceeds the output voltage of the rectifier module 13 to the DC distribution cabinet 16, the power supply state is changed from the power supply of the rectifier module 13 to the DC distribution cabinet 16 to the power supply of the battery pack 15 to the DC distribution cabinet 16, the capacity verification test is started, and the voltage, current and internal resistance of the battery pack 15 in the capacity verification test process are recorded at a fixed time, and a corresponding twelfth voltage value, sixth current value and second internal resistance value are generated, after the capacity verification test is completed, the active test device 18 performs a voltage reduction operation on the battery pack 15, so that the battery pack 15 returns to the total output voltage before the capacity verification test;

[0050] The ground resistance conduction detection module 184 is electrically connected with the ground resistance conduction device 17, regularly measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet 1, and generates a corresponding third internal resistance value.

[0051] The monitoring and communication module 185 provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value, the eleventh voltage value, and the twelfth voltage value as voltage data to the remote centralized management server, provides the first current value, the second current value, the third current value, the fourth current value, the fifth current value, and the sixth current value as current data to the remote centralized management server, and provides the first internal resistance value, the second internal resistance value, and the third internal resistance value as internal resistance data and the displacement state value to the remote centralized management server.

[0052] In order to facilitate understanding of the technical idea and technical scheme of the present application, the detailed implementation process of the present application is described as follows:

[0053] System overall state detection:

[0054] As shown in Figure 3 The system overall state acquisition module 181 includes an alternating current power supply input acquisition unit 1811, a rectification output acquisition unit 1812, a direct current output bus acquisition unit 1813, a storage battery backup power supply acquisition unit 1814, and a load direct current input bus acquisition unit 1815.

[0055] The AC power supply input collection unit 1811 is electrically connected with the double-path AC input bus 11, collects the voltage of the double-path AC input bus 11, and generates a corresponding first voltage value. The rectifier output collection unit 1812 is electrically connected with the rectifier module 13, collects the DC 48V voltage and current output by the rectifier module 13, and generates a corresponding second voltage value and first current value. The DC output bus collection unit 1813 is electrically connected with the DC bus 14, collects the total output 48V voltage and current of the DC bus 14, and generates a corresponding third voltage value and second current value. The battery backup power collection unit 1814 is electrically connected with the battery pack 15, collects the total voltage, current and internal resistance of the battery pack 15, and generates a corresponding fourth voltage value, third current value and first internal resistance value. The load DC input bus collection unit 1815 is electrically connected with the DC distribution screen cabinet 16, collects the total input voltage and current of the DC distribution screen cabinet 16, and generates a corresponding fifth voltage value and fourth current value. The first voltage value, the second voltage value, the third voltage value, the fourth voltage value and the fifth voltage value collected by the system total state collection module 181 are taken as voltage data, the first current value, the second current value, the third current value and the fourth current value are taken as current data, and the first internal resistance value is taken as internal resistance data. The voltage data, the current data and the internal resistance data are uploaded to the remote centralized management server through the communication and monitoring module 185. The relevant staff can compare the collected voltage data, current data and internal resistance data with the voltage value, current value and internal resistance parameter in the normal state of the double-path AC input bus 11, the rectifier module 13, the DC bus 14, the battery pack 15 and the DC distribution screen cabinet 16. If abnormal voltage data, current data and internal resistance data appear, the components with hidden troubles can be accurately located according to the labels of the voltage data, current data and internal resistance data for targeted maintenance.

[0056] II. AC switching test:

[0057] As shown in Figure 4 , the AC switching module 182 includes a senior side double-path AC power supply input collection unit 1821, an AC input contactor control unit 1822 and an AC bus collection unit 1823.

[0058] The upper side double-way AC power supply input collection unit 1821 is electrically connected with the double-way AC input bus 11, collects the voltage of the double-way AC input bus 11, generates a corresponding sixth voltage value, the AC bus collection unit 1823 is electrically connected with the output end of the AC switching device 12, collects the voltage output by the AC switching device 12, generates a corresponding seventh voltage value, the AC input contactor control unit 1822 is electrically connected with the AC switching device 12 to control one of the double-way input bus 11 to be disconnected, and generates a displacement state value, at the same time, the upper side double-way AC power supply input collection unit 1821 collects the voltage of the double-way AC input bus 11 at the input end of the AC switching device 12, generates a corresponding ninth voltage value, and the AC bus collection unit 1823 collects the voltage at the output end of the AC switching device, and generates a corresponding tenth voltage value;

[0059] The double-way AC input bus 11 includes a commonly used double-way AC input bus 111, a standby double-way AC input bus 112, a commonly used air switch 113, and a standby air switch 114, the commonly used double-way AC input bus 111 is electrically connected with the commonly used air switch 113, and the standby double-way AC input bus 112 is electrically connected with the standby air switch 114;

[0060] The AC switching device includes a commonly used contactor 121, a standby contactor 122, an ATS AC switching device 123, and an AC bus 124, the AC bus collection unit 1823 is electrically connected with the AC bus 124 at the output end of the AC switching device 12, collects the voltage of the AC bus 124 at the output end of the AC switching device, and generates a corresponding seventh voltage value and a corresponding tenth voltage value;

[0061] The commonly used double-way AC input bus 111, the commonly used air switch 113, the commonly used contactor 121, the ATS AC switching device 123, and the AC bus 124 are sequentially electrically connected, and the standby double-way AC input bus 112, the standby air switch 114, the standby contactor 122, the ATS AC switching device 123, and the AC bus 124 are sequentially electrically connected;

[0062] 1. Test conditions to be met before starting the AC switching test

[0063] (1) The upper side double circuit AC power supply input collection unit 1821 collects the voltage of the double circuit AC input bus 11 of the AC switching device 12, generates a corresponding sixth voltage value, the AC bus collection unit 1823 collects the voltage of the AC bus 124 at the output end of the AC switching device 12, generates a corresponding seventh voltage value, the battery backup power collection unit 1813 collects the voltage and internal resistance of the battery pack 15 as a whole, and generates a corresponding eighth voltage value and a first internal resistance value. The sixth voltage value, the seventh voltage value, the eighth voltage value, and the first internal resistance value are uploaded to the remote centralized management server through the communication and monitoring module 185, to ensure that the double circuit AC input bus 11, the AC switching device 12, and the battery pack 15 are normally working during the AC switching test, and to exclude interference on the AC switching test.

[0064] (2) The normally used air switch 113 and the standby air switch 114 are both closed, and the two normally open contacts NO of the normally used contactor 121 and the standby contactor 122 are both closed, so that the A1 main contact and the A2 main contact of the normally used contactor 121 and the standby contactor 122 are both kept attracted, and the current of the normally used AC input bus 111 and the standby AC input bus 112 can be conducted to the ATS AC switching device 123, and the ATS AC switching device 123 guides the normally used AC input bus 111 and the AC bus 124, and the normally used AC input bus 111 supplies power to the AC bus 124.

[0065] 2. AC switching test working process

[0066] (1) The ATS AC switching device 123 switches from the normally used AC input bus 111 to the standby AC input bus 112 for testing: the AC input contactor control unit 1822 controls the normally open contact NO of the normally used contactor 121 to be disconnected, so that the A1 main contact and the A2 main contact of the normally used contactor 121 are disconnected, and the current of the normally used AC input bus 111 cannot reach the ATS AC switching device 123. The corresponding ATS AC switching device 123 switches from the normally used AC input bus 111 to the standby AC input bus 112, and simultaneously generates an AC power supply displacement state, and the AC input contactor control unit 1822 generates a corresponding displacement state value a. At the same time, the upper side double circuit AC power supply input collection unit 1821 collects the voltage of the normally used AC input bus 111 and generates a corresponding ninth voltage value, and the AC bus collection unit 1823 collects the voltage of the AC bus 124 at the output end of the AC switching device 12 and generates a corresponding tenth voltage value. Related personnel can compare the displacement state and voltage parameters of the ATS AC switching device 123 normally working state from the normally used AC input bus 111 to the standby AC input bus 112, and judge whether there is a hidden danger;

[0067] (2) After the end of the test in (1), the ATS AC switching device 123 is recovered from the standby road AC input bus 112 to the normal road AC input bus 111 test: the AC input contactor control unit 1822 controls the normally open contact NO of the normal road contactor 121 to close the power supply to recover, so that the A1 main contact and the A2 main contact of the normal road contactor 121 are attracted, and the current of the normal road AC input bus 111 can reach the ATS AC switching device 123. The corresponding ATS AC switching device 123 is switched from the standby road AC input bus 112 to the normal road AC input bus 111, while generating an AC power supply change position state, and the AC input contactor control unit 1822 generates a corresponding change position state value b. At the same time, the upper side double AC power supply input acquisition unit 1821 acquires the voltage of the normal road AC input bus 111 and generates a corresponding ninth voltage value. The AC bus acquisition unit 1823 acquires the voltage of the AC bus 124 at the output end of the AC switching device 12 and generates a corresponding tenth voltage value. The relevant staff can compare the change position state and voltage parameters of the ATS AC switching device 123 under normal working condition from the standby road AC input bus 112 to the normal road AC input bus 111, and judge whether there is a hidden danger of failure according to the acquired change position state value b, the ninth voltage value and the tenth voltage value;

[0068] (3) After the ATS AC switching device 123 completes the test on the normal road AC input bus 111: the AC input contactor control unit 1822 controls the normally open contact NO of the normal road contactor 121 to disconnect the power supply, so that the A1 main contact and the A2 main contact of the normal road contactor 121 are disconnected, and the current of the normal road AC input bus 111 cannot reach the ATS AC switching device 123. Correspondingly, the ATS AC switching device 123 is switched from the normal road AC input bus 111 to the standby road AC input bus 112. Then, the AC input contactor control unit 1822 controls the normally open contact NO of the normal road contactor 121 to close the power supply to recover, so that the A1 main contact and the A2 main contact of the normal road contactor 121 are attracted, and the current of the normal road AC input bus 111 can reach the ATS AC switching device 123. At this time, the ATS AC switching device 123 conducts the standby road AC input bus 112 and the AC bus 124, and the standby road AC input bus 112 supplies power to the AC bus 124;

[0069] (4) After (3) is completed, start the ATS AC switching device 123 to switch from the standby road AC input bus 112 to the normal road AC input bus 111 test: the AC input contactor control unit 1822 controls the normally open contact NO of the standby road contactor 122 to be powered off, so that the A1 main contact and the A2 main contact of the standby road contactor 122 are disconnected, so that the current of the standby road AC input bus 112 cannot reach the ATS AC switching device 123, and the corresponding ATS AC switching device 123 switches from the standby road AC input bus 112 to the normal road AC input bus 111, while generating an AC power supply change state, and the AC input contactor control unit 1822 generates a corresponding change state value c, and the upper side dual AC power supply input acquisition unit 1821 acquires the voltage of the standby road AC input bus 112 and generates a corresponding ninth voltage value, and the AC bus acquisition unit 1823 acquires the voltage of the AC switching device 12 output end AC bus 124 and generates a corresponding tenth voltage value. The relevant personnel can compare the change state value c, the ninth voltage value, and the tenth voltage value collected with the change state and voltage parameters of the ATS AC switching device 123 under normal working condition when switching from the standby road AC input bus 112 to the normal road AC input bus 111 to determine whether there is a hidden danger.

[0070] (5) After the test in (4) is completed, start the ATS AC switching device 123 to switch from the normal road AC input bus 111 to the standby road AC input bus 112 test: the AC input contactor control unit 1822 controls the normally open contact NO of the standby road contactor 122 to be powered on to restore power, so that the A1 main contact and the A2 main contact of the standby road contactor 122 are attracted, so that the current of the standby road AC input bus 112 can reach the ATS AC switching device 123, and the corresponding ATS AC switching device 123 switches from the standby road AC input bus 112 to the normal road AC input bus 111, while generating an AC power supply change state, and the AC input contactor control unit 1822 generates a corresponding change state value d, and the upper side dual AC power supply input acquisition unit 1821 acquires the voltage of the standby road AC input bus 112 and generates a corresponding ninth voltage value, and the AC bus acquisition unit 1823 acquires the voltage of the AC switching device 12 output end AC bus 124 and generates a corresponding tenth voltage value. The relevant personnel can compare the change state value d, the ninth voltage value, and the tenth voltage value collected with the change state and voltage parameters of the ATS AC switching device 123 under normal working condition when switching from the normal road AC input bus 111 to the standby road AC input bus 112 to determine whether there is a hidden danger.

[0071] III. Battery inspection and capacity test module

[0072] For example Figure 5As shown, the battery inspection and capacity test module 183 includes a capacity test unit 1831, a single battery inspection unit 1832, the single battery inspection unit 1832 is electrically connected with the battery pack 15, collects the total voltage of the battery pack 15, and generates a corresponding eleventh voltage value; the single battery inspection unit 1832 is electrically connected with the total cable output by the battery pack 15, collects the current of the total cable output by the battery pack 15, and generates a corresponding fifth current value, the capacity test unit 1831 is electrically connected with the battery pack 15, according to the set test parameters, the battery pack 15 is boosted to make the total output voltage of the battery pack 15 exceed the output voltage of the rectifier module 13 to the DC distribution screen cabinet 16, the power supply state is changed from the rectifier module 13 to the DC distribution screen cabinet 16 to the battery pack 15 to the DC distribution screen cabinet 16, the capacity test is started, the single battery inspection unit 1832 records the voltage, current and internal resistance of the battery pack 15 during the capacity test, and generates corresponding twelfth voltage value, sixth current value and second internal resistance value, after the capacity test is completed, the capacity test unit 1821 performs a voltage reduction operation on the battery pack to restore the total output voltage of the battery pack 15 to that before the capacity test;

[0073] The capacity test unit 1831 includes a DC / DC capacity test and charging unit 18311, a normally closed contact 18312 and a normally open contact 18313, which are electrically connected in sequence, the single battery inspection unit 1832 is electrically connected with the battery pack 15, collects the total voltage of the battery pack 15, and generates a corresponding eleventh voltage value, the single battery inspection unit 1831 is electrically connected with the total cable output by the battery pack 15, collects the current of the total cable output by the battery pack 15, and generates a corresponding fifth current value, the relevant staff can accurately judge whether the battery pack 15 has hidden troubles by comparing the eleventh voltage value and the fifth current value collected with the voltage and current parameters of the battery pack 15 in the normal working state, the single battery inspection unit 1832 is electrically connected with the positive and negative electrodes of each battery, the single battery inspection unit 1832 records the voltage, current and internal resistance of each battery during the capacity test, and generates corresponding twelfth voltage value, sixth current value and second internal resistance value, the relevant staff can accurately find the single battery with faults by different labels of abnormal data by comparing the twelfth voltage value, the sixth current value and the second internal resistance value collected with the voltage, current and internal resistance parameters of each battery in the normal working state;

[0074] 1. Battery inspection and capacity test module test process

[0075] (1) When the battery inspection and capacity backup module 183 is not tested, the rectifier module 13 supplies power to the DC distribution screen cabinet 16, and at the same time, supplies small current floating charge to the battery pack 15, the normally closed contact 18312 of the capacity backup unit 1831 is closed, and the normally open contact 18313 is disconnected, at this time, the capacity backup unit 1831 is in an offline state and does not hinder the normal work of the maintenance-free high-frequency switching power supply cabinet 1;

[0076] (2) When the battery inspection and capacity backup module 183 is tested, first, the normally closed contact 18312 of the capacity backup unit 1831 is disconnected, and the normally open contact 18313 is closed, at this time, the circuit of the rectifier module 13 and the battery pack 15 is disconnected, the rectifier module 13 cannot charge the battery pack 15, the DC / DC capacity backup and charging group 18311 of the capacity backup unit 1831 increases the total output voltage of the battery pack 15, so that the total output voltage of the battery pack 15 exceeds the output voltage of the rectifier module 13, at this time, the power supply state is changed from the rectifier module 13 supplying power to the DC distribution screen cabinet 16 and small current floating charge to the battery pack 15 to the battery pack 15 supplying power to the DC distribution screen cabinet 16 load, at the same time, the single battery inspection unit 1831 records the voltage, current and internal resistance of each battery of the battery pack 15 during the capacity backup test, and generates the corresponding twelfth voltage value, sixth current value and second internal resistance value;

[0077] (3) When the battery inspection and capacity backup module 183 test is stopped, according to the capacity backup test parameters set in the capacity backup unit 1831 in advance, for example, the automatic stop condition is time to 8 hours or capacity to 8 hours x 15A = 120Ah capacity, when the automatic stop condition is reached, the DC / DC capacity backup and charging group 18311 of the capacity backup unit 1831 adjusts the voltage of the battery pack 15, so that the voltage of the battery pack 15 is adjusted to be the same as the output voltage value of the rectifier module 13, the normally closed contact 18312 of the capacity backup unit 1831 is closed, and the normally open contact 18313 is disconnected, at this time, the circuit of the rectifier module 13 and the battery pack 15 is connected, the rectifier module 13 resumes to charge the battery pack 15 with small current floating charge, and the system as a whole returns to the state before the battery inspection and capacity backup module 183 test.

[0078] Four, ground resistance conduction detection:

[0079] As shown in Figure 6 , the ground resistance conduction detection module 184 includes a conduction resistance collection unit 1841, which is electrically connected with the ground resistance conduction device 17, measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet 1 regularly, and generates the corresponding third internal resistance value;

[0080] The grounding resistance conduction device 17 comprises a conduction resistance measuring instrument 171, an in-cabinet grounding bus 172 of a high-frequency switch power supply cabinet, an in-cabinet grounding bus 173 of a DC distribution screen cabinet, a machine room potential grounding point 174, and the conduction resistance measuring instrument 171 is electrically connected with the in-cabinet grounding bus 172 of the high-frequency switch power supply cabinet, the in-cabinet grounding bus 173 of the DC distribution screen cabinet, and the machine room potential grounding point 174;

[0081] The conduction resistance collecting unit 1841 is electrically connected with the conduction resistance measuring instrument 171, regularly measures the conduction resistance of the in-cabinet grounding bus 172 of the high-frequency switch power supply cabinet, the in-cabinet grounding bus 173 of the DC distribution screen cabinet, and the machine room potential grounding point 174, generates a corresponding third internal resistance value, and relevant staff can compare the collected third internal resistance value with the overall grounding conduction internal resistance parameter of the maintenance-free high-frequency switch power supply cabinet 1 in a normal state, and accurately judge whether the grounding resistance conduction device 17 has a fault hidden danger.

[0082] Five, voltage data, current data, internal resistance data, and displacement state value integration and transmission:

[0083] As shown in Figure 7 The monitoring and communication module 185 comprises a system overall state receiving unit 1851, an AC switching state data receiving unit 1852, a storage battery state data receiving unit 1853, a grounding conduction resistance data receiving unit 1854, a data recording unit 1855, a data integration unit 1856, and a communication unit 1857.

[0084] The system overall state receiving unit 1851 is electrically connected with the system overall state collecting module 181, receives the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the eighth voltage value, the first current value, the second current value, the third current value, the fourth current value, and the first internal resistance value, the AC switching state data receiving unit 1852 is electrically connected with the AC switching module 182, receives the sixth voltage value, the seventh voltage value, the ninth voltage value, the tenth voltage value, and the displacement state value, the storage battery state data receiving unit 1853 is electrically connected with the storage battery inspection and capacity checking module 183, receives the eleventh voltage value, the twelfth voltage value, the fifth current value, the sixth current value, and the second internal resistance value, and the grounding conduction resistance data receiving unit 1854 is electrically connected with the grounding resistance conduction detection module 184, receives the third internal resistance value.

[0085] The data recording unit 1855 stores voltage data, current data, internal resistance data, and displacement state values received by the system overall state receiving unit 1851, the AC switching state data receiving unit 1852, the battery state data receiving unit 1853, and the ground conduction resistance data receiving unit 1854; the data integration unit 1856 sets the voltage data, current data, internal resistance data, station identification, and equipment identification, and generates communication data after protocol conversion; and the communication unit 1857 transmits the communication data generated by the integration unit 1856 to the remote centralized management server.

[0086] The related operating personnel do not need to go to the maintenance site, and the maintenance-free high-frequency switching power supply cabinet 1 can complete the system overall state detection, AC switching test, battery check discharge test, and ground conduction resistance test, thereby improving the detection efficiency and convenience, ensuring the safety of the test personnel, and enabling the related operating personnel to understand the voltage data, current data, internal resistance data, and displacement state values of the maintenance-free high-frequency switching power supply cabinet 1 at the remote centralized management server end, and to timely handle faults and hidden dangers according to the understood data, thereby ensuring that the maintenance-free high-frequency switching power supply cabinet 1 can stably and continuously supply power.

Claims

1. A maintenance-free high-frequency switching power supply cabinet, characterized in that: The active testing device is electrically connected with the double-way AC input bus, the AC switching device, the rectifier module, the DC bus, the battery pack, the DC distribution screen cabinet and the grounding resistance conduction device. The active testing device collects the voltage of the double-way AC input bus, generates a corresponding first voltage value, collects the DC 48V voltage and current output by the rectifier module, and generates corresponding second voltage value and first current value, collects the total output 48V voltage and current of the DC bus, and generates corresponding third voltage value and second current value, collects the voltage and current of the battery pack, and generates corresponding fourth voltage value and third current value, collects the total input voltage and current of the DC distribution screen cabinet, and generates corresponding fifth voltage value and fourth current value. The active testing device also collects the voltage of the double-way AC input bus on the AC switching device, generates a corresponding sixth voltage value, collects the voltage output by the AC switching device, generates a corresponding seventh voltage value, collects the voltage and internal resistance of the battery pack, generates a corresponding eighth voltage value and first internal resistance value, and controls one of the double-way input buses to be disconnected to generate a displacement state and a corresponding displacement state value. The active testing device also collects the total voltage of the battery pack and generates a corresponding eleventh voltage value, collects the total cable current output by the battery pack and generates a corresponding fifth current value, performs voltage boosting operation on the battery pack according to the set test parameters, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet, and the power supply state changes from power supply of the rectifier module to the DC distribution screen cabinet to power supply of the battery pack to the DC distribution screen cabinet, starts the capacity test, and records the voltage, current and internal resistance of the battery pack during the capacity test, and generates corresponding twelfth voltage value, sixth current value and second internal resistance value. The active testing device is electrically connected with the grounding resistance conduction device, measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet at regular intervals, and generates a corresponding third internal resistance value. The active testing device provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value, the eleventh voltage value, the twelfth voltage value as voltage data to the remote centralized management server, the first current value, the second current value, the third current value, the fourth current value, the fifth current value, the sixth current value as current data to the remote centralized management server, the first internal resistance value, the second internal resistance value, the third internal resistance value as internal resistance data and the displacement state value to the remote centralized management server.

2. The maintenance-free high-frequency switching power supply cabinet according to claim 1, characterized in that: The active testing device comprises a system overall state acquisition module, an alternating current switching module, a storage battery inspection and capacity checking module, a grounding resistance conduction detection module and a monitoring and communication module, wherein the monitoring and communication module is electrically connected with the system overall state acquisition module, the alternating current switching module, the storage battery inspection and capacity checking module and the grounding resistance conduction detection module. The system overall state acquisition module is electrically connected with a double-path alternating current input bus, collects the voltage of the double-path alternating current input bus, generates a corresponding first voltage value, is electrically connected with a rectifier module, collects the direct current 48V voltage and current output by the rectifier module, and generates corresponding second voltage value and first current value, is electrically connected with a direct current bus, collects the overall output 48V voltage and current of the direct current bus, and generates corresponding third voltage value and second current value, is electrically connected with a storage battery pack, collects the voltage, current and internal resistance of the overall storage battery pack, and generates corresponding fourth voltage value, eighth voltage value, third current value and first internal resistance value, and is electrically connected with a direct current distribution screen cabinet, collects the total input voltage and current of the direct current distribution screen cabinet, and generates corresponding fifth voltage value and fourth current value. The alternating current switching module is electrically connected with the double-path alternating current input bus, collects the voltage of the double-path alternating current input bus, generates a corresponding sixth voltage value, is electrically connected with an alternating current switching device, collects the voltage output by the alternating current switching device, generates a corresponding seventh voltage value, controls one of the double-path alternating current input buses to be disconnected to generate a displacement state, and generates a corresponding displacement state value, simultaneously collects the voltage of the double-path alternating current input bus at the input end of the alternating current switching device, generates a corresponding ninth voltage value, and collects the voltage at the output end of the alternating current switching device, generates a corresponding tenth voltage value. The battery inspection and capacity verification module is electrically connected with the battery pack, collects the total voltage of the battery pack, and generates a corresponding eleventh voltage value. The battery inspection and capacity verification module is electrically connected with the total cable output by the battery pack, collects the current of the total cable output by the battery pack, and generates a corresponding fifth current value. The battery inspection and capacity verification module performs a boosting operation on the battery pack according to the set test parameters, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet. The power supply state is changed from power supply of the rectifier module to the DC distribution screen cabinet to power supply of the battery pack to the DC distribution screen cabinet. The capacity verification test is started, and the voltage, current and internal resistance of the battery pack during the capacity verification test are recorded at regular time intervals, and corresponding twelfth voltage value, sixth current value and second internal resistance value are generated. After the capacity verification test is completed, the active test device performs a step-down operation on the battery pack, so that the total output voltage of the battery pack returns to that before the capacity verification test. The ground resistance conduction detection module is electrically connected with the ground resistance conduction device, regularly measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet, and generates a corresponding third internal resistance value. The monitoring and communication module provides the first voltage value, the second voltage value, the third voltage value, the fourth voltage value, the fifth voltage value, the sixth voltage value, the seventh voltage value, the eighth voltage value, the ninth voltage value, the tenth voltage value and the eleventh voltage value as voltage data to the remote centralized management server, provides the first current value, the second current value, the third current value, the fourth current value, the fifth current value and the sixth current value as current data to the remote centralized management server, and provides the first internal resistance value, the second internal resistance value and the third internal resistance value as internal resistance data and displacement state value to the remote centralized management server.

3. The maintenance-free high-frequency switching power supply cabinet according to claim 2, characterized in that: The system overall state acquisition module includes an alternating current power input acquisition unit, a rectifier output acquisition unit, a direct current output bus acquisition unit, a battery pack backup power acquisition unit and a load direct current input bus acquisition unit. The alternating current power input acquisition unit is electrically connected with the double-way alternating current input bus, acquires the voltage of the double-way alternating current input bus, and generates a corresponding first voltage value. The rectifier output acquisition unit is electrically connected with the rectifier module, acquires the direct current 48V voltage and current output by the rectifier module, and generates a corresponding second voltage value and first current value. The direct current output bus acquisition unit is electrically connected with the direct current bus, acquires the overall output 48V voltage and current of the direct current bus, and generates a corresponding third voltage value and second current value. The battery pack backup power acquisition unit is electrically connected with the battery pack, acquires the overall voltage, current and internal resistance of the battery pack, and generates a corresponding fourth voltage value, eighth voltage value, third current value and first internal resistance value. The load direct current input bus acquisition unit is electrically connected with the direct current distribution screen cabinet, acquires the total input voltage and current of the direct current distribution screen cabinet, and generates a corresponding fifth voltage value and fourth current value.

4. The maintenance-free high-frequency switching power supply cabinet according to claim 2, characterized in that: The alternating current switching module includes a superior side double-way alternating current power input acquisition unit, an alternating current input contactor control unit and an alternating current bus acquisition unit. The upper side double-way AC power supply input collection unit is electrically connected with the double-way AC input bus, collects the voltage of the double-way AC input bus, generates a corresponding sixth voltage value, the AC bus collection unit is electrically connected with the output end of the AC switching device, collects the voltage output by the AC switching device, generates a corresponding seventh voltage value, the AC input contactor control unit is electrically connected with the AC switching device to control one of the double-way input buses to be disconnected, generates a displacement state value, and meanwhile the upper side double-way AC power supply input collection unit collects the voltage of the double-way AC input bus at the input end of the AC switching device, generates a corresponding ninth voltage value, and the AC bus collection unit collects the voltage at the output end of the AC switching device, generates a corresponding tenth voltage value.

5. The maintenance-free high-frequency switching power supply cabinet according to claim 2, characterized in that: The battery inspection and capacity test module comprises a single battery inspection unit and a capacity test unit, the single battery inspection unit is electrically connected with the battery pack, collects the total voltage of the battery pack, and generates a corresponding eleventh voltage value, the single battery inspection unit is electrically connected with the total cable output by the battery pack, collects the current of the total cable output by the battery pack, and generates a corresponding fifth current value, the capacity test unit is electrically connected with the battery pack, according to the set test parameters, performs a voltage boosting operation on the battery pack, so that the total output voltage of the battery pack exceeds the output voltage of the rectifier module to the DC distribution screen cabinet, the power supply state is changed from the power supply of the rectifier module to the DC distribution screen cabinet to the power supply of the battery pack to the DC distribution screen cabinet, the capacity test is started, the single battery inspection unit records the voltage, current and internal resistance of the battery pack during the capacity test at regular time intervals, and generates a corresponding twelfth voltage value, sixth current value and second internal resistance value, after the capacity test is completed, the capacity test unit performs a voltage reducing operation on the battery pack, so that the battery pack returns to the total output voltage before the capacity test.

6. The maintenance-free high-frequency switching power supply cabinet according to claim 2, characterized in that: The grounding resistance conduction detection module comprises a conduction resistance collection unit, the conduction resistance collection unit is electrically connected with the grounding resistance conduction device, periodically measures the conduction resistance of the maintenance-free high-frequency switching power supply cabinet, and generates a corresponding third internal resistance value.

7. The maintenance-free high-frequency switching power supply cabinet according to claim 2, characterized in that: The monitoring and communication module comprises a system overall state receiving unit, an AC switching state data receiving unit, a battery state data receiving unit, a grounding conduction resistance data receiving unit, a data recording unit, a data integration unit and a communication unit. The system overall state receiving unit is electrically connected with the system overall state collection module, receives the first voltage value, second voltage value, third voltage value, fourth voltage value, fifth voltage value, eighth voltage value, first current value, second current value, third current value, fourth current value and first internal resistance value, the AC switching state data receiving unit is electrically connected with the AC switching module, receives the sixth voltage value, seventh voltage value, ninth voltage value, tenth voltage value and displacement state value, the battery state data receiving unit is electrically connected with the battery inspection and capacity test module, receives the eleventh voltage value, twelfth voltage value, fifth current value, sixth current value and second internal resistance value, and the grounding conduction resistance data receiving unit is electrically connected with the grounding resistance conduction detection module, and receives the third internal resistance value. The data recording unit stores voltage data, current data, internal resistance data, and displacement state values received by the system overall state receiving unit, the AC switch state data receiving unit, the battery state data receiving unit, and the ground conduction resistance data receiving unit, the data integration unit sets station identification and equipment identification to which the voltage data, the current data, and the internal resistance data belong, and performs protocol conversion and interfacing, and the communication unit transmits communication data generated by the integration unit to a remote centralized management server.

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