A switch cabinet load drive startup control method, device and medium

Abstract

The present invention discloses a start-up control method, device and medium for a switch cabinet load drive, which relates to the technical field of load drive control and solves the problem of insufficient protection of a power control device during start-up and stop in the current switch cabinet load drive system, as well as the problem of lack of real-time feedback on the conduction effect during soft start and soft stop of the power control device. The method comprises the following steps: constructing a start-up permission condition for the power control device based on a real-time device signal and a standard device signal; detecting the conduction condition of the power control device based on a zero-crossing interrupt signal received by the power control device; soft-starting the power control device based on a start-up control parameter; obtaining the number of modules of a three-phase main power supply in the power control device, and soft-stopping the power control device when the power control device receives a stop command. The present invention can provide safety protection and conduction feedback to the switch cabinet load drive system during the start-up and stop processes.

Description

Technical Field

[0001] The present invention belongs to the technical field of load drive control, and in particular relates to a start-up control method, device and medium for load drive of a switch cabinet. Background Art

[0002] Load-driven startup control is a control method used to smoothly start AC loads in power systems. It aims to achieve flexible energy release to the load by gradually adjusting the conduction ratio of power devices. This method typically uses the AC zero-crossing point as the control reference. By setting parameters such as the number of startup segments, the on-duty cycle, and the on-time, the on-time is gradually increased, thereby controlling the gradual increase in load current and avoiding equipment damage or grid disturbances caused by direct full-voltage surges. This control process can be combined with real-time feedback signals such as current, voltage, and temperature to achieve dynamic monitoring of the startup process and identify anomalies, ensuring the safety and reliability of load startup.

[0003] In the current switchgear load drive system, the startup and shutdown processes of the power control device generally have the problem of insufficient protection of the switchgear equipment. There is a lack of health status detection of the power control device, which causes the power control device to be mistakenly triggered to start under a fault state. At the same time, there is a lack of real-time feedback on the conduction effect of each section during the soft start and soft stop of the power control device, resulting in the inability to timely perceive any abnormalities in the conduction effect during the soft start and soft stop of the power control device.

[0004] To this end, the present invention provides a startup control method, device and medium for load driving of a switch cabinet. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a method, device and medium for starting control of a switch cabinet load drive.

[0006] The technical problems to be solved by the present invention are:

[0007] How to provide safety protection and conduction feedback to the switchgear load drive system during startup and shutdown.

[0008] In the first aspect, in order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0009] A switch cabinet load drive startup control method, the method comprising:

[0010] Step S1, obtaining a real-time device signal and a standard device signal of a power control device, and establishing a startup permission condition for the power control device based on the real-time device signal and the standard device signal;

[0011] Step S2, obtaining a real-time current value and a real-time voltage value of the power control device, and detecting a conduction condition of the power control device based on a zero-crossing interrupt signal received by the power control device;

[0012] Step S3, obtaining a startup control parameter of the power control device, and soft-starting the power control device according to the startup control parameter;

[0013] Step S4: obtaining the number of modules of the three-phase main power supply in the power control device, and performing a soft stop on the power control device when the power control device receives a stop instruction.

[0014] Furthermore, the power control device is composed of a three-phase main power supply, an ammeter, a voltage transformer, a temperature sensor, and a varistor;

[0015] The real-time device signals are a real-time power supply signal of a three-phase main power supply, a real-time ammeter signal of an ammeter, a real-time transformer signal of a voltage transformer, a real-time sensor signal of a temperature sensor, and a real-time varistor signal of a varistor;

[0016] The standard device signals are a standard power supply signal of a three-phase main power supply, a standard ammeter signal of an ammeter, a standard transformer signal of a voltage transformer, a standard sensor signal of a temperature sensor, and a standard varistor signal of a varistor.

[0017] Furthermore, the step S1 includes the following sub-steps:

[0018] Step S11, obtaining the health status of the three-phase main power supply, ammeter, voltage transformer, temperature sensor and varistor of the power control device, and converting the real-time device signal of the power control device into a digital signal, specifically:

[0019] When the real-time signal sent by any hardware in the power control device is the same as the corresponding standard signal, the health status of the corresponding hardware is determined to be healthy, and the corresponding health status value is recorded as one; when the real-time signal sent by any hardware in the power control device is different from the corresponding standard signal, the health status of the corresponding hardware is determined to be unhealthy, and the corresponding health status value is recorded as zero;

[0020] Step S12, constructing a startup permission condition for the power control device using a Boolean expression and the health status of all hardware;

[0021] Step S13: When the startup permission condition of the power control device is one, the Boolean expression is determined to be true, and the corresponding power control device meets the startup condition, and the process goes to step S2;

[0022] When the startup permission condition of the power control device is zero, the Boolean expression is determined to be false, and the corresponding power control device does not meet the startup condition. The power control device is maintained until the Boolean expression is true and enters step S2.

[0023] Furthermore, step S2 includes the following sub-steps:

[0024] Step S21: When the power control device receives the zero-crossing interrupt signal, the power control device sends a trigger pulse signal, obtains the start time node and the end time node of the trigger pulse signal, and subtracts the end time node from the start time node to obtain the trigger pulse duration;

[0025] Step S22, obtaining the real-time current value and real-time voltage value of the power control device within the trigger pulse duration, recording the real-time voltage value as the pulse voltage, and recording the real-time current value as the pulse current value;

[0026] Step S23, traversing the pulse current values ​​of the power control device to obtain the maximum pulse current value within the trigger pulse duration;

[0027] Step S24, calculating the effective current value of the power control device;

[0028] Step S25: If the effective current value is greater than or equal to the minimum on-current threshold, and the maximum pulse current value is less than or equal to the maximum current threshold, proceed to the next step;

[0029] If the effective current value is less than the minimum current threshold, or the maximum pulse current value is greater than the maximum current threshold, the conduction condition of the power control device is determined to be abnormal conduction;

[0030] Step S26, traversing the pulse voltage values ​​of the power control device to obtain the maximum pulse voltage value and the minimum pulse voltage value within the trigger pulse duration, subtracting the maximum pulse voltage value from the minimum pulse voltage value to obtain the voltage change of the power control device;

[0031] Step S27, when the voltage variation of the power control device does not belong to the voltage variation interval, determining that the conduction condition of the power control device is abnormal conduction;

[0032] When the voltage variation of the power control device belongs to the voltage variation interval, it is determined that the conduction condition of the power control device is normal.

[0033] Furthermore, the starting control parameters are the number of starting segments, the initial conduction ratio, the conduction ratio increment and the half-wave length of the soft start process of the power control device, wherein the initial conduction ratio is specifically the ratio of the conduction time allowed for the switch cabinet equipment in each AC half-wave to the half-wave length in the first conduction segment of the soft start process of the power control device.

[0034] Furthermore, step S3 includes the following sub-steps:

[0035] Step S31, obtaining the initial conduction ratio and conduction ratio increment of the power control device during the soft start process, and calculating the conduction ratio of each conduction segment;

[0036] Step S32: multiplying the conduction ratio of the first conduction section by the half-wave duration to obtain the conduction duration during which the power control device sends a trigger pulse signal in the first conduction section. When the power control device detects the zero-crossing interrupt signal for the first time in the first conduction section, the power control device sends a trigger pulse signal.

[0037] Step S33, obtaining the real-time current value and real-time voltage value of the power control device, recording the real-time current value corresponding to the conduction time as the soft start current value, and recording the real-time voltage value as the soft start voltage value;

[0038] Step S34 , traversing the soft start current value to obtain the maximum pulse current value of the power control device within the conduction time.

[0039] Furthermore, the step S3 further includes the following sub-steps:

[0040] Step S35, calculating the soft start effective current value of the power control device. When the soft start effective current value is less than or equal to the maximum soft start effective current value, and the maximum pulse current value is less than or equal to the maximum current threshold, proceeding to the next step;

[0041] When the soft start effective current value is greater than the maximum soft start effective current value, or the maximum pulse current value is greater than the maximum current threshold, the soft start condition of the power control device in the first conduction section is determined to be a conduction abnormality, and the soft start of the power control device is interrupted;

[0042] Step S36, traversing the soft start voltage values ​​of the power control device to obtain a maximum soft start voltage value and a minimum soft start voltage value within the conduction time, subtracting the maximum soft start voltage value from the minimum soft start voltage value to obtain a soft start voltage change of the power control device;

[0043] When the soft-start voltage variation of the power control device does not belong to the voltage variation interval, determining that the soft-start condition of the power control device in the first conduction section is conduction abnormality, and interrupting the soft-start of the power control device;

[0044] When the soft-start voltage variation of the power control device falls within the voltage variation interval, it is determined that the soft-start condition of the power control device in the first conduction section is normal, and the process proceeds to the next step.

[0045] Step S37, obtain the conduction time of the power control device in the second conduction section, repeat steps S34 to S36 until the soft start status of the power control device in all conduction sections is normal, determine that the soft start of the power control device is successful, and the power control device successfully controls the switch cabinet equipment.

[0046] Furthermore, step S4 includes the following sub-steps:

[0047] Step S41: The module that controls the current of phase U in the three-phase main power supply is recorded as module A, the module that controls the current of phase V in the three-phase main power supply is recorded as module B, and the module that controls the current of phase W in the three-phase main power supply is recorded as module C;

[0048] Step S42, obtaining the maximum conduction ratio and conduction ratio decrement during the soft stop process of the power control device, and calculating the conduction ratio of each conduction section;

[0049] Step S43: constructing a first soft stop conduction ratio diagram and a second soft stop conduction ratio diagram of the power control device, wherein the X-axis represents the conduction segment number and the Y-axis represents the conduction ratio. When the conduction segment number is an odd number, only the conduction ratio of module A is reduced; when the conduction segment number is an even number, the conduction ratios of modules B and C are alternately reduced.

[0050] When the conduction ratio of module A is reduced to 0%, if the conduction segment number is an even number, the conduction ratio of module B is reduced; if the conduction segment number is an odd number, the conduction ratio of module C is reduced;

[0051] Step S44, and so on, until the conduction ratios of module A, module B, and module C are all reduced to zero, and the soft stop of the power control device is completed.

[0052] In a second aspect, the present invention further provides a computer device, comprising:

[0053] a memory storing a computer program;

[0054] A processor is communicatively connected to the memory, and when the computer program is executed by the processor, the method described is implemented.

[0055] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method described above when executed by a processor.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] 1. The present invention obtains a real-time device signal and a standard device signal of a power control device, and then establishes a startup permission condition for the power control device based on the real-time device signal and the standard device signal. Furthermore, the present invention obtains a real-time current value and a real-time voltage value of the power control device, and detects the conduction status of the power control device based on a zero-crossing interrupt signal received by the power control device.

[0058] 2. The present invention also soft-starts the power control device according to the start-up control parameters, and simultaneously obtains the number of modules of the three-phase main power supply in the power control device, so as to realize soft parking of the power control device when the power control device receives a stop command. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0060] Figure 1 is a flow chart of the method of the present invention;

[0061] Figure 2 This is an example diagram of the soft stop conduction ratio of the power control device corresponding to module A in the present invention;

[0062] Figure 3 This is an example diagram of the soft stop conduction ratio of the power control device corresponding to module B in the present invention;

[0063] Figure 4 This is an example diagram of the soft stop conduction ratio of the power control device corresponding to the C module in the present invention;

[0064] Figure 5 It is a structural diagram of the computer device in the present invention. DETAILED DESCRIPTION

[0065] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0066] Example 1: Please refer to Figures 1-4 As shown, the technical solution provided by the present invention is: a startup control method for load drive of a switch cabinet, which is used to analyze the load drive of the power control device in the switch cabinet equipment. The method is specifically as follows:

[0067] Step S1, obtaining a real-time device signal and a standard device signal of a power control device, and establishing a startup permission condition for the power control device based on the real-time device signal and the standard device signal;

[0068] Among them, the power control device is specifically composed of a three-phase main power supply, an ammeter, a voltage transformer, a temperature sensor and a varistor;

[0069] Specifically, the real-time device signal is a real-time power supply signal of a three-phase main power supply, a real-time ammeter signal of an ammeter, a real-time transformer signal of a voltage transformer, a real-time sensor signal of a temperature sensor, and a real-time varistor signal of a varistor;

[0070] The standard device signals specifically include a standard power supply signal of a three-phase main power supply, a standard ammeter signal of an ammeter, a standard transformer signal of a voltage transformer, a standard sensor signal of a temperature sensor, and a standard varistor signal of a varistor;

[0071] In this embodiment, step S1 includes the following sub-steps:

[0072] Step S11, obtaining the health status P of the three-phase main power supply, the health status K of the ammeter, the health status G of the voltage transformer, the health status T of the temperature sensor, and the health status R of the varistor of the power control device, and converting the real-time device signal of the power control device into a digital signal;

[0073] Specifically, when the real-time signal sent by any hardware in the power control device is the same as the corresponding standard signal, the health status of the corresponding hardware is determined to be healthy, and the corresponding health status value is recorded as one;

[0074] When the real-time signal sent by any hardware in the power control device is different from the corresponding standard signal, the health status of the corresponding hardware is determined to be unhealthy, and the corresponding health status value is recorded as zero;

[0075] For example, the voltage transformer sends a real-time transformer signal, and the real-time transformer signal is identified by an electronic computer. When the electronic computer identifies that the real-time transformer signal sent by the voltage transformer is "24V", it is compared with the standard transformer signal "24V". At this time, the real-time transformer signal is the same as the standard transformer signal, then the health status of the voltage transformer is determined to be healthy, and the health status of the voltage transformer G=1;

[0076] When the electronic computer recognizes that the real-time transformer signal sent by the voltage transformer is "0V", it compares it with the standard transformer signal "24V". At this time, if the real-time transformer signal is different from the standard transformer signal, the health status of the voltage transformer is determined to be unhealthy, and the health status of the voltage transformer G=0;

[0077] Step S12: construct the startup permission condition S of the power control device through the Boolean expression and the health status of all hardware. The specific formula is as follows:

[0078] S=PΛKΛGΛTΛR; where Λ is the symbol of logical operation, representing "and";

[0079] Step S13: When the startup permission condition of the power control device is one, the Boolean expression is determined to be true, and the corresponding power control device meets the startup condition, and the process goes to step S2;

[0080] When the startup permission condition of the power control device is zero, the Boolean expression is determined to be false, and the corresponding power control device does not meet the startup condition. The power control device is maintained until the Boolean expression is true and enters step S2.

[0081] Step S2, obtaining a real-time current value and a real-time voltage value of the power control device, and detecting a conduction condition of the power control device based on a zero-crossing interrupt signal received by the power control device;

[0082] Specifically, the zero-crossing interrupt signal is an interrupt signal generated when the AC voltage in the power control device changes from a positive value to a negative value, or from a negative value to a positive value; the AC voltage is a sine wave signal, and when the instantaneous value of the AC voltage is zero, that is, the real-time voltage value of the AC voltage changes from a positive value to a negative value, or from a negative value to a positive value;

[0083] In this embodiment, step S2 includes the following sub-steps:

[0084] Step S21: When the power control device receives the zero-crossing interrupt signal, the power control device sends a trigger pulse signal, obtains the start time node and the end time node of the trigger pulse signal, and subtracts the end time node from the start time node to obtain the trigger pulse duration;

[0085] Specifically, the trigger pulse signal is used to turn on the circuit of the switchgear device once;

[0086] Step S22, obtaining the real-time current value and real-time voltage value of the power control device within the trigger pulse duration, recording the real-time voltage value as the pulse voltage, and recording the real-time current value as the pulse current value MDLi, where i is the detection number, i=1, 2, ..., n, and n is the maximum detection number;

[0087] Step S23, traversing the pulse current values ​​of the power control device to obtain the maximum pulse current value within the trigger pulse duration;

[0088] Step S24, calculate the effective current value YXD of the power control device using the RMS current formula, the specific formula is as follows:

[0089] ;

[0090] Step S25: If the effective current value is greater than or equal to the minimum on-current threshold, and the maximum pulse current value is less than or equal to the maximum current threshold, proceed to the next step;

[0091] If the effective current value is less than the minimum current threshold, or the maximum pulse current value is greater than the maximum current threshold, the conduction condition of the power control device is determined to be abnormal conduction;

[0092] It should be noted that the minimum on-current threshold is specifically the minimum current value at which the circuit of the switchgear device can operate normally;

[0093] Step S26, traversing the pulse voltage values ​​of the power control device to obtain the maximum pulse voltage value and the minimum pulse voltage value within the trigger pulse duration, subtracting the maximum pulse voltage value from the minimum pulse voltage value to obtain the voltage change of the power control device;

[0094] Step S27, when the voltage variation of the power control device does not belong to the voltage variation interval, determining that the conduction condition of the power control device is abnormal conduction;

[0095] When the voltage variation of the power control device belongs to the voltage variation interval, it is determined that the conduction condition of the power control device is normal.

[0096] Step S3, obtaining a startup control parameter of the power control device, and soft-starting the power control device according to the startup control parameter;

[0097] Among them, the starting control parameters include the starting segment number, initial conduction ratio, conduction ratio increment and half-wave duration of the soft starting process of the power control device;

[0098] The initial conduction ratio is specifically the ratio of the conduction time allowed for the switchgear device to the half-wave time in each AC half-wave during the first conduction period of the soft start process of the power control device;

[0099] Specifically, the half-wave duration is the duration of any segment in the positive half cycle or the negative half cycle of the AC voltage waveform within a complete cycle;

[0100] In this embodiment, step S3 includes the following sub-steps:

[0101] Step S31, obtaining the initial conduction ratio CSD and conduction ratio increment DTZ of the power control device during the soft start process, and calculating the conduction ratio DTBk of each conduction segment by the formula, which is as follows:

[0102] DTBk=CSD+(k-1)×DTZ, where k is the conduction segment number, k=1, 2, ..., m, and m is the maximum number of startup segments;

[0103] Step S32: multiplying the conduction ratio of the first conduction section by the half-wave duration to obtain the conduction duration during which the power control device sends a trigger pulse signal in the first conduction section. When the power control device detects the zero-crossing interrupt signal for the first time in the first conduction section, the power control device sends a trigger pulse signal.

[0104] Step S33, obtaining the real-time current value and real-time voltage value of the power control device, recording the real-time current value corresponding to the conduction time as the soft start current value, and recording the real-time voltage value as the soft start voltage value;

[0105] Step S34, traversing the soft start current value to obtain the maximum pulse current value of the power control device within the conduction time;

[0106] Step S35, calculating the soft start effective current value of the power control device using the RMS current formula. When the soft start effective current value is less than or equal to the maximum soft start effective current value, and the maximum pulse current value is less than or equal to the maximum current threshold, proceed to the next step.

[0107] When the soft start effective current value is greater than the maximum soft start effective current value, or the maximum pulse current value is greater than the maximum current threshold, the soft start condition of the power control device in the first conduction section is determined to be a conduction abnormality, and the soft start of the power control device is interrupted;

[0108] In specific implementation, the maximum soft start effective current value can be 250mA;

[0109] Step S36, traversing the soft start voltage values ​​of the power control device to obtain a maximum soft start voltage value and a minimum soft start voltage value within the conduction time, subtracting the maximum soft start voltage value from the minimum soft start voltage value to obtain a soft start voltage change of the power control device;

[0110] When the soft-start voltage variation of the power control device does not belong to the voltage variation interval, determining that the soft-start condition of the power control device in the first conduction section is conduction abnormality, and interrupting the soft-start of the power control device;

[0111] When the soft-start voltage variation of the power control device falls within the voltage variation interval, it is determined that the soft-start condition of the power control device in the first conduction section is normal, and the process proceeds to the next step.

[0112] Step S37, obtain the conduction time of the power control device in the second conduction section, repeat steps S34 to S36 until the soft start status of the power control device in all conduction sections is normal, determine that the soft start of the power control device is successful, and the power control device successfully controls the switch cabinet equipment.

[0113] Step S4, obtaining the number of modules of the three-phase main power supply in the power control device, and performing a soft stop on the power control device when the power control device receives a stop command;

[0114] In a specific implementation, the number of modules of the three-phase main power supply in the power control device is specifically three;

[0115] In this embodiment, step S4 includes the following sub-steps:

[0116] Step S41: The module that controls the current of phase U in the three-phase main power supply is recorded as module A, the module that controls the current of phase V in the three-phase main power supply is recorded as module B, and the module that controls the current of phase W in the three-phase main power supply is recorded as module C;

[0117] Step S42: Obtain the maximum conduction ratio ZDD and conduction ratio decrement DTJ during the soft stop process of the power control device, and calculate the conduction ratio DTBk of each conduction segment using the formula. The formula is as follows:

[0118] DTBk=ZDD+(k-1)×DTJ, where k is the conduction segment number, k=1, 2, ..., m, and m is the maximum number of parking segments;

[0119] Among them, the number of parking segments is the same as the number of starting segments;

[0120] In specific implementation, the maximum conduction ratio is 100%, and the conduction ratio reduction is 10%;

[0121] Step S43, as Figure 2-Figure 3 As shown, a first soft stop conduction ratio diagram and a second soft stop conduction ratio diagram of the power control device are constructed, wherein the X-axis is the conduction segment number and the Y-axis is the conduction ratio. When the conduction segment number is an odd number, only the conduction ratio of module A is reduced; when the conduction segment number is an even number, the conduction ratios of modules B and C are reduced alternately;

[0122] When the conduction ratio of module A is reduced to 0%, if the conduction segment number is an even number, the conduction ratio of module B is reduced; if the conduction segment number is an odd number, the conduction ratio of module C is reduced;

[0123] For example, when the conduction segment is numbered as the first conduction segment, module A performs a soft stop, the conduction ratio of module A is reduced from 100% to 80%, the conduction ratios of modules B and C are both 100%, and no operation is performed;

[0124] When the conduction segment number is the second conduction segment, module B performs soft parking, the conduction ratio of module B decreases from 100% to 80%, the conduction ratio of module C is 100%, the conduction ratio of module A is 80%, and no operation is performed;

[0125] When the conduction segment number is the third conduction segment, module A performs a soft stop, the conduction ratio of module A decreases from 80% to 60%, the conduction ratio of module C is 100%, the conduction ratio of module B is 80%, and no operation is performed;

[0126] When the conduction segment number is the fourth conduction segment, module C performs a soft stop, the conduction ratio of module C decreases from 100% to 80%, the conduction ratio of module A is 60%, the conduction ratio of module B is 80%, and no operation is performed;

[0127] Step S44, and so on, until the conduction ratios of module A, module B, and module C are all reduced to zero, and the soft stop of the power control device is completed.

[0128] In this application, if a corresponding calculation formula appears, the above calculation formula is dimensionless and its numerical calculation is performed. The weight coefficient, proportional coefficient and other coefficients in the formula are set to a result value obtained by quantifying each parameter. Regarding the size of the weight coefficient and the proportional coefficient, as long as it does not affect the proportional relationship between the parameter and the result value, it is acceptable.

[0129] Example 2: Figure 5 The following is a schematic diagram of the structure of a computer device, such as Figure 5 As shown, the computer device may include: a processor, a communications interface, a memory, and a communications bus, wherein the processor, the communications interface, and the memory communicate with each other via the communications bus. The processor may call logic instructions in the memory to execute a startup control method for a switchgear load drive, the method comprising: obtaining real-time device signals and standard device signals from a power control device, and establishing startup permission conditions for the power control device based on the real-time device signals and the standard device signals; obtaining real-time current and voltage values ​​of the power control device, and detecting the conduction status of the power control device based on a zero-crossing interrupt signal received by the power control device; obtaining startup control parameters of the power control device, and soft-starting the power control device based on the startup control parameters; obtaining the number of modules of a three-phase main power supply in the power control device, and soft-stopping the power control device when the power control device receives a stop command.

[0130] In addition, the logical instructions in the above-mentioned memory can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0131] Example 3: The present application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a start-up control method for a switch cabinet load drive provided by the above methods, the method including: obtaining a real-time device signal and a standard device signal of the power control device, and constructing a start-up permission condition of the power control device based on the real-time device signal and the standard device signal; obtaining a real-time current value and a real-time voltage value of the power control device, and detecting the conduction status of the power control device based on the zero-crossing interrupt signal received by the power control device; obtaining the start-up control parameters of the power control device, and soft-starting the power control device according to the start-up control parameters; obtaining the number of modules of the three-phase main power supply in the power control device, and soft-stopping the power control device when the power control device receives a stop command.

[0132] Example 4: The present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the above-mentioned startup control method for a switch cabinet load drive, the method comprising: obtaining a real-time device signal and a standard device signal of the power control device, and constructing a startup permission condition for the power control device based on the real-time device signal and the standard device signal; obtaining a real-time current value and a real-time voltage value of the power control device, and detecting the conduction condition of the power control device based on the zero-crossing interrupt signal received by the power control device; obtaining a startup control parameter of the power control device, and soft-starting the power control device according to the startup control parameter; obtaining the number of modules of the three-phase main power supply in the power control device, and soft-stopping the power control device when the power control device receives a stop command.

[0133] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0134] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A switch cabinet load drive startup control method, characterized in that: Methods include: Step S1, obtaining a real-time device signal and a standard device signal of a power control device, and establishing a startup permission condition for the power control device based on the real-time device signal and the standard device signal; Step S2, obtaining a real-time current value and a real-time voltage value of the power control device, and detecting a conduction condition of the power control device based on a zero-crossing interrupt signal received by the power control device; Step S3, obtaining a startup control parameter of the power control device, and soft-starting the power control device according to the startup control parameter; The step S3 includes the following sub-steps: Step S31, obtaining the initial conduction ratio and conduction ratio increment of the power control device during the soft start process, and calculating the conduction ratio of each conduction segment; Step S32: multiplying the conduction ratio of the first conduction section by the half-wave duration to obtain the conduction duration during which the power control device sends a trigger pulse signal in the first conduction section. When the power control device detects the zero-crossing interrupt signal for the first time in the first conduction section, the power control device sends a trigger pulse signal. Step S33, obtaining the real-time current value and real-time voltage value of the power control device, recording the real-time current value corresponding to the conduction time as the soft start current value, and recording the real-time voltage value as the soft start voltage value; Step S34, traversing the soft start current value to obtain the maximum pulse current value of the power control device within the conduction time; Step S35, calculating the soft start effective current value of the power control device. When the soft start effective current value is less than or equal to the maximum soft start effective current value, and the maximum pulse current value is less than or equal to the maximum current threshold, proceeding to the next step; When the soft start effective current value is greater than the maximum soft start effective current value, or the maximum pulse current value is greater than the maximum current threshold, the soft start condition of the power control device in the first conduction section is determined to be a conduction abnormality, and the soft start of the power control device is interrupted; Step S36, traversing the soft start voltage values ​​of the power control device to obtain a maximum soft start voltage value and a minimum soft start voltage value within the conduction time, subtracting the maximum soft start voltage value from the minimum soft start voltage value to obtain a soft start voltage change of the power control device; When the soft-start voltage variation of the power control device does not belong to the voltage variation interval, determining that the soft-start condition of the power control device in the first conduction section is conduction abnormality, and interrupting the soft-start of the power control device; When the soft-start voltage variation of the power control device falls within the voltage variation interval, it is determined that the soft-start condition of the power control device in the first conduction section is normal, and the process proceeds to the next step. Step S37, obtaining the conduction time of the power control device in the second conduction section, repeating steps S34 to S36 until the soft start of the power control device in all conduction sections is normal, determining that the soft start of the power control device is successful, and the power control device successfully controls the switchgear equipment; Step S4: obtaining the number of modules of the three-phase main power supply in the power control device, and performing a soft stop on the power control device when the power control device receives a stop instruction.

2. A switch cabinet load drive startup control method according to claim 1, characterized in that: The power control device consists of a three-phase main power supply, an ammeter, a voltage transformer, a temperature sensor and a varistor; The real-time device signals are a real-time power supply signal of a three-phase main power supply, a real-time ammeter signal of an ammeter, a real-time transformer signal of a voltage transformer, a real-time sensor signal of a temperature sensor, and a real-time varistor signal of a varistor; The standard device signals are a standard power supply signal of a three-phase main power supply, a standard ammeter signal of an ammeter, a standard transformer signal of a voltage transformer, a standard sensor signal of a temperature sensor, and a standard varistor signal of a varistor.

3. A switch cabinet load drive startup control method according to claim 2, characterized in that: The step S1 includes the following sub-steps: Step S11, obtaining the health status of the three-phase main power supply, ammeter, voltage transformer, temperature sensor and varistor of the power control device, and converting the real-time device signal of the power control device into a digital signal, specifically: When the real-time signal sent by any hardware in the power control device is the same as the corresponding standard signal, the health status of the corresponding hardware is determined to be healthy, and the corresponding health status value is recorded as one; when the real-time signal sent by any hardware in the power control device is different from the corresponding standard signal, the health status of the corresponding hardware is determined to be unhealthy, and the corresponding health status value is recorded as zero; Step S12, constructing a startup permission condition for the power control device using a Boolean expression and the health status of all hardware; Step S13: When the startup permission condition of the power control device is one, the Boolean expression is determined to be true, and the corresponding power control device meets the startup condition, and the process goes to step S2; When the startup permission condition of the power control device is zero, the Boolean expression is determined to be false, and the corresponding power control device does not meet the startup condition. The power control device is maintained until the Boolean expression is true and enters step S2.

4. A switch cabinet load drive startup control method according to claim 3, characterized in that: The step S2 includes the following sub-steps: Step S21: When the power control device receives the zero-crossing interrupt signal, the power control device sends a trigger pulse signal, obtains the start time node and the end time node of the trigger pulse signal, and subtracts the end time node from the start time node to obtain the trigger pulse duration; Step S22, obtaining the real-time current value and real-time voltage value of the power control device within the trigger pulse duration, recording the real-time voltage value as the pulse voltage, and recording the real-time current value as the pulse current value; Step S23, traversing the pulse current values ​​of the power control device to obtain the maximum pulse current value within the trigger pulse duration; Step S24, calculating the effective current value of the power control device; Step S25: If the effective current value is greater than or equal to the minimum on-current threshold, and the maximum pulse current value is less than or equal to the maximum current threshold, proceed to the next step; If the effective current value is less than the minimum current threshold, or the maximum pulse current value is greater than the maximum current threshold, the conduction condition of the power control device is determined to be abnormal conduction; Step S26, traversing the pulse voltage values ​​of the power control device to obtain the maximum pulse voltage value and the minimum pulse voltage value within the trigger pulse duration, subtracting the maximum pulse voltage value from the minimum pulse voltage value to obtain the voltage change of the power control device; Step S27, when the voltage variation of the power control device does not belong to the voltage variation interval, determining that the conduction condition of the power control device is abnormal conduction; When the voltage variation of the power control device belongs to the voltage variation interval, it is determined that the conduction condition of the power control device is normal.

5. The method for starting and controlling a switch cabinet load drive according to claim 1, wherein: The starting control parameters are the number of starting segments, the initial conduction ratio, the conduction ratio increment and the half-wave length of the soft start process of the power control device. Among them, the initial conduction ratio is specifically the ratio of the conduction time allowed for the switch cabinet equipment in each AC half-wave to the half-wave length in the first conduction segment of the soft start process of the power control device.

6. The method for starting and controlling a switch cabinet load drive according to claim 1, wherein: The step S4 includes the following sub-steps: Step S41: The module that controls the current of phase U in the three-phase main power supply is recorded as module A, the module that controls the current of phase V in the three-phase main power supply is recorded as module B, and the module that controls the current of phase W in the three-phase main power supply is recorded as module C; Step S42, obtaining the maximum conduction ratio and conduction ratio decrement during the soft stop process of the power control device, and calculating the conduction ratio of each conduction section; Step S43: constructing a first soft stop conduction ratio diagram and a second soft stop conduction ratio diagram of the power control device, wherein the X-axis represents the conduction segment number and the Y-axis represents the conduction ratio. When the conduction segment number is an odd number, only the conduction ratio of module A is reduced; when the conduction segment number is an even number, the conduction ratios of modules B and C are alternately reduced. When the conduction ratio of module A is reduced to 0%, if the conduction segment number is an even number, the conduction ratio of module B is reduced; if the conduction segment number is an odd number, the conduction ratio of module C is reduced; Step S44, and so on, until the conduction ratios of module A, module B, and module C are all reduced to zero, and the soft stop of the power control device is completed.

7. A computer device, characterized in that: The computer device comprises: a memory storing a computer program; A processor is communicatively connected to the memory, and when the computer program is executed by the processor, the method according to any one of claims 1 to 6 is implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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