Semi-dynamic adjustment method, system and device for wave-by-wave current limiting and storage medium

Abstract

The invention relates to a wave-by-wave current limiting semi-dynamic adjustment method, system and device and a storage medium. When the current output by the industrial control equipment is detected to meet the wave-by-wave current-limiting trigger point, generating a wave-by-wave current-limiting trigger signal, and recording the triggering times of the wave-by-wave current-limiting trigger signal; when the triggering frequency meets a triggering frequency threshold value, the wave-by-wave current limiting triggering signal is sent to a processing unit, so that the processing unit carries out fault analysis on the wave-by-wave current limiting triggering signal, and a corresponding wave sealing strategy is executed based on a fault analysis result; compared with the prior art, according to the technical scheme, the response speed of the system can be increased, and then the stability and reliability of the system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of industrial control, and in particular to a semi-dynamic adjustment method, system, device and storage medium for wave-by-wave current limiting. Background Art

[0002] With the call for energy conservation and emission reduction, industrial control equipment such as inverters, servo systems, PLCs, etc. are increasingly used in the industrial field and have become the core components of motor control; however, industrial control equipment may encounter serious problems such as overcurrent and overvoltage during actual use, which pose a threat to the stability and safety of industrial production; in order to solve these problems, the existing technology generally adopts the wave-by-wave current limiting method, but the existing wave-by-wave current limiting method has some defects. For example, after each wave-by-wave current limiting is closed, it is necessary to wait for the carrier counter to return to zero before enabling the PWM output again; this will not only lead to excessive current limiting, but also may increase the current harmonics introduced by the wave-by-wave current limiting, affecting the stability and reliability of the system;

[0003] In addition, since the traditional hardware wave-by-wave current limiting solution may cause the current to drop to zero and then rise rapidly when in use, it is easy to cause transient switching of the driver tube, thereby causing failures; therefore, it is necessary to develop a new wave-by-wave current limiting technology to achieve more precise and flexible current control, reduce unnecessary current harmonics, and improve the stability and reliability of the system. Summary of the invention

[0004] The present application provides a semi-dynamic adjustment method, system, device and storage medium for wave-by-wave current limiting, which can improve the response speed of the system and further improve the stability and reliability of the system.

[0005] In the first aspect, the present application provides a semi-dynamic adjustment method of wave-by-wave current limiting, including: when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point, generating a wave-by-wave current limiting trigger signal, and recording the triggering number of the wave-by-wave current limiting trigger signal; when the triggering number meets the triggering number threshold, sending the wave-by-wave current limiting trigger signal to a processing unit, so that the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal, and executes a corresponding wave blocking strategy based on the fault analysis result.

[0006] Furthermore, when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point, a wave-by-wave current limiting trigger signal is generated, which specifically includes: obtaining the current output in the industrial control equipment, converting the current into a voltage signal to obtain a corresponding voltage signal; inputting the voltage signal into a comparator so that the comparator compares the voltage signal with a comparator threshold signal, wherein the comparator threshold signal includes a comparator high threshold signal and a comparator low threshold signal; when it is detected that the voltage signal is greater than the comparator high threshold signal, or when it is detected that the voltage signal is less than the comparator low threshold signal, it is determined that the current meets the wave-by-wave current limiting trigger point; when it is detected that the voltage signal is less than the comparator high threshold signal, or when it is detected that the voltage signal is greater than the comparator low threshold signal, it is determined that the current does not meet the wave-by-wave current limiting trigger point.

[0007] Furthermore, recording the triggering number of the wave-by-wave current limiting trigger signal specifically includes: when it is detected that the wave-by-wave current limiting trigger signal exists in the current control cycle, obtaining the current triggering number of the wave-by-wave current limiting trigger signal, accumulating the current triggering number, updating and recording the triggering number of the wave-by-wave current limiting trigger signal; when it is detected that the wave-by-wave current limiting trigger signal does not exist in the current control cycle, obtaining the current triggering number of the wave-by-wave current limiting trigger signal, clearing the current triggering number, updating and recording the triggering number of the wave-by-wave current limiting trigger signal.

[0008] Furthermore, before the triggering number meets the triggering number threshold, it also includes: obtaining the triggering number of the wave-by-wave current limiting trigger signal, and when the triggering number is less than a first triggering number threshold, determining that the triggering number meets the triggering number threshold.

[0009] Furthermore, after recording the triggering times of the wave-by-wave current limiting trigger signal, it also includes: judging whether the triggering times of the wave-by-wave current limiting trigger signal is not less than a first triggering times threshold value, and if so, generating a wave-by-wave current limiting fault flag; based on the wave-by-wave current limiting fault flag, generating a whole-machine wave-sealing instruction, and based on the whole-machine wave-sealing instruction, performing a whole-machine wave-sealing operation on the industrial control equipment.

[0010] Further, the processing unit performs a fault analysis on the wave-by-wave current limiting trigger signal, specifically including: determining whether the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and determining whether the triggering number of the wave-by-wave current limiting trigger signal is greater than a second triggering number threshold; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the second triggering number threshold, outputting a fault analysis result as a short continuous fault; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, the triggering number of the wave-by-wave current limiting trigger signal is greater than the second triggering number threshold, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the first triggering number threshold, outputting a fault analysis result as a long continuous fault.

[0011] Furthermore, based on the fault analysis result, a corresponding blocking strategy is determined, specifically including: when the fault analysis result is a short continuous fault, executing a short blocking strategy; when the fault analysis result is a long continuous fault, executing a long blocking strategy; wherein the blocking time corresponding to the long blocking strategy is greater than the blocking time corresponding to the short blocking strategy.

[0012] In the second aspect, the present application provides a semi-dynamic adjustment system of wave-by-wave current limiting, including: a wave-by-wave current limiting trigger module and a wave-blocking strategy execution module; wherein, the wave-by-wave current limiting trigger module is used to generate a wave-by-wave current limiting trigger signal and record the number of triggering times of the wave-by-wave current limiting trigger signal when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point; the wave-blocking strategy execution module is used to send the wave-by-wave current limiting trigger signal to a processing unit when the number of triggering times meets a triggering number threshold, so that the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal, and executes the corresponding wave-blocking strategy based on the fault analysis result.

[0013] In a third aspect, the present application provides an electronic device, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is used to implement the semi-dynamic adjustment step of the wave-by-wave current limiting as described in any one of the above items of the present application when executing a program stored in the memory.

[0014] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the semi-dynamic adjustment method of wave-by-wave current limiting as described in any one of the above items of the present application.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application, when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point, generates a wave-by-wave current limiting trigger signal, and records the triggering times of the wave-by-wave current limiting trigger signal; when the triggering times meet the triggering times threshold, sends the wave-by-wave current limiting trigger signal to the processing unit, so that the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal, and executes the corresponding wave blocking strategy based on the fault analysis result; compared with the traditional wave-by-wave current limiting method which needs to wait for the carrier counter to return to zero before re-enabling the PWM output, the present application By detecting the number of triggers and responding in time when the trigger number threshold is met, the overcurrent situation can be reacted to more quickly, the waiting time can be reduced, and unnecessary current blocking during the period when the carrier counter returns to zero can be reduced, thereby avoiding excessive current limiting and improving the efficiency of the system; finally, the wave-by-wave current limiting trigger signal is sent to the processing unit, which can be processed separately according to the actual current situation of the processing unit, avoiding the problem of phase inconsistency; by adopting a dynamically adjusted wave blocking strategy, the corresponding wave blocking strategy can be executed according to the actual fault analysis result, instead of adopting a fixed wave blocking time, so that the output current of the industrial control equipment can be controlled more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 It is a flow chart of an embodiment of a semi-dynamic adjustment method of wave-by-wave current limiting provided by the present application;

[0020] Figure 2 It is a structural schematic diagram of an embodiment of a semi-dynamic adjustment system for wave-by-wave current limiting provided by the present application;

[0021] Figure 3 is a schematic structural diagram of a voltage divider circuit of a comparator according to an embodiment of the present application;

[0022] Figure 4 It is a structural schematic diagram of a hardware detection circuit in an industrial control device according to an embodiment of the present application;

[0023] Figure 5 It is a structural schematic diagram of an electronic device provided by this application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] Example 1, see Figure 1 , Figure 1 : is a flow chart of an embodiment of a semi-dynamic adjustment method of wave-by-wave current limiting provided by the present application, such as Figure 1 As shown, the method includes steps 101 and 102, which are specifically as follows:

[0027] Step 101: when it is detected that the current outputted from the industrial control device meets the wave-by-wave current limiting trigger point, a wave-by-wave current limiting trigger signal is generated, and the number of times the wave-by-wave current limiting trigger signal is triggered is recorded.

[0028] In one embodiment, the current output from the industrial control equipment is obtained, and the current is converted into a voltage signal to obtain a corresponding voltage signal; the voltage signal is input into a comparator so that the comparator compares the voltage signal with a comparator threshold signal, wherein the comparator threshold signal includes a comparator high threshold signal and a comparator low threshold signal; when it is detected that the voltage signal is greater than the comparator high threshold signal, or when it is detected that the voltage signal is less than the comparator low threshold signal, it is determined that the current meets the wave-by-wave current limiting trigger point; when it is detected that the voltage signal is less than the comparator high threshold signal, or when it is detected that the voltage signal is greater than the comparator low threshold signal, it is determined that the current does not meet the wave-by-wave current limiting trigger point.

[0029] Preferably, when it is detected that the voltage signal is equal to the high threshold signal of the comparator, or when it is detected that the voltage signal is equal to the low threshold signal of the comparator, it can be determined that the current does not meet the wave-by-wave current limiting trigger point; preferably, when it is detected that the voltage signal is equal to the high threshold signal of the comparator, or when it is detected that the voltage signal is equal to the low threshold signal of the comparator, it can also be determined that the current meets the wave-by-wave current limiting trigger point; that is, in the case of being equal, it can be distinguished according to the user setting whether the current meets the wave-by-wave current limiting trigger point.

[0030] Preferably, the industrial control equipment includes but is not limited to a cascade-type high-voltage inverter, a servo system and a programmable logic controller PLC.

[0031] In one embodiment, the central main control part of the industrial control equipment detects whether the value of the output current reaches the wave-by-wave current limiting trigger point based on the hardware detection circuit.

[0032] Specifically, the current output by the industrial control equipment is detected based on the Hall sensor, wherein the current includes but is not limited to two-phase current, three-phase current and six-phase current; preferably, when the current is a three-phase current, the three-phase single current is a U-phase current, a V-phase current and a W three-phase current.

[0033] Specifically, the current signal is converted into a voltage signal based on a Hall sensor or a current transformer, wherein the voltage signal is proportional to the current signal.

[0034] like Figure 3 As shown, Figure 3 It is a structural schematic diagram of a voltage divider circuit of a comparator, wherein the voltage divider circuit includes a reference voltage input terminal, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a ground terminal, wherein the voltage input terminal is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected to the ground terminal.

[0035] Specifically, after the VCC voltage is input from the voltage input terminal, it is divided by the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 to generate a reference voltage range; this reference voltage range is divided into two upper and lower thresholds, namely the upper threshold REF_H and the lower threshold REF_L shown in the figure.

[0036] Specifically, the upper threshold REF_H is set as a comparator high threshold signal, and the lower threshold REF_L is set as a comparator low threshold signal.

[0037] Taking the output current of the industrial control equipment as a three-phase current as an example, whether the output current of the industrial control equipment meets the wave-by-wave current limiting trigger point is described. Figure 4 As shown, Figure 4 The invention is a structural diagram of a hardware detection circuit in an industrial control device, wherein the hardware detection circuit comprises a U-phase current comparison circuit, a V-phase current comparison circuit and a W-phase current comparison circuit.

[0038] Wherein, the U-phase current comparison circuit includes a U-phase current input terminal IU, a reference voltage input terminal VREF, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a fifth capacitor C5, a first comparator and a second comparator; the U-phase current input terminal IU is connected to the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is respectively connected to the first end of the sixth resistor R6, the first end of the fifth capacitor C5, the negative input terminal IN- of the first comparator and the positive input terminal IN+ of the second comparator; the second end of the sixth resistor R6 is connected to the reference voltage input terminal VREF, the second end of the fifth capacitor C5 is grounded, and the first comparator The positive input terminal IN+ of the comparator is respectively connected to the first end of the first capacitor C1 and the comparator high threshold signal input terminal REF_H, and the second end of the first capacitor C1 is grounded; the negative input terminal IN- of the first comparator is also connected to the positive input terminal IN+ of the second comparator, the negative input terminal IN- of the second comparator is respectively connected to the first end of the second capacitor C2 and the comparator low threshold signal REF_L input terminal, the second end of the second capacitor C2 is grounded, the first end of the first comparator is connected to the voltage input terminal VCC, and the second end of the first comparator is grounded; the output terminal IOUT of the first comparator is connected to the output terminal IOUT of the second comparator.

[0039] Wherein, the V-phase current comparison circuit includes a V-phase current input terminal IV, a reference voltage input terminal VREF, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a sixth capacitor C6, a third comparator and a fourth comparator; the V-phase current input terminal IV is connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is respectively connected to the first end of the eighth resistor R8, the first end of the sixth capacitor C6, the negative input terminal IN- of the third comparator and the positive input terminal IN+ of the fourth comparator; the second end of the eighth resistor R8 is connected to the reference voltage input terminal VREF, the second end of the sixth capacitor C6 is grounded, and the third comparator is connected to the reference voltage input terminal VREF. The positive input terminal IN+ of the comparator is respectively connected to the first end of the third capacitor C3 and the comparator high threshold signal input terminal REF_H, and the second end of the third capacitor C3 is grounded; the negative input terminal IN- of the third comparator is also connected to the positive input terminal IN+ of the fourth comparator, the negative input terminal IN- of the fourth comparator is respectively connected to the first end of the fourth capacitor C4 and the comparator low threshold signal input terminal REF_L, the second end of the fourth capacitor C4 is grounded, the first end of the third comparator is connected to the voltage input terminal VCC, and the second end of the third comparator is grounded; the output terminal IOUT of the third comparator is connected to the output terminal IOUT of the fourth comparator.

[0040] Wherein, the W-phase current comparison circuit includes a W-phase current input terminal IW, a reference voltage input terminal VREF, an eleventh resistor R11, a twelfth resistor R12, an eighth capacitor C8, a seventh capacitor C7, a ninth capacitor C9, a fifth comparator and a sixth comparator; the W-phase current input terminal IW is connected to the first end of the eleventh resistor R11, and the second end of the eleventh resistor R11 is respectively connected to the first end of the twelfth resistor R12, the first end of the eighth capacitor C8, the negative input terminal IN- of the fifth comparator and the positive input terminal IN+ of the sixth comparator; the second end of the twelfth resistor R12 is connected to the reference voltage input terminal VREF, and the second end of the eighth capacitor C8 is grounded , the positive input terminal IN+ of the fifth comparator is respectively connected to the first end of the seventh capacitor C7 and the comparator high threshold signal input terminal REF_H, and the second end of the seventh capacitor C7 is grounded; the negative input terminal IN- of the fifth comparator is also connected to the positive input terminal IN+ of the sixth comparator, the negative input terminal IN- of the sixth comparator is respectively connected to the first end of the ninth capacitor C9 and the comparator low threshold signal input terminal REF_L, the second end of the ninth capacitor C9 is grounded, the first end of the fifth comparator is connected to the voltage input terminal VCC, and the second end of the fifth comparator is grounded; the output terminal IOUT of the fifth comparator is connected to the output terminal IOUT of the sixth comparator.

[0041] Specifically, the hardware detection circuit also includes a wave-by-wave current limiting signal trigger detection circuit, wherein the wave-by-wave current limiting signal trigger detection circuit includes a ninth resistor R9, a tenth resistor R10, a fifth capacitor C5 and a wave-by-wave current limiting trigger detection terminal CBC; wherein the output terminal IOUT of the U-phase current comparison circuit, the V-phase current comparison circuit and the W-phase current comparison circuit are respectively connected to the first end of the ninth resistor R9 and the first end of the tenth resistor R10, the second end of the ninth resistor R9 is connected to the voltage input terminal VCC, the second end of the tenth resistor R10 is respectively connected to the first end of the fifth capacitor C5 and the wave-by-wave current limiting trigger detection terminal CBC, and the second end of the fifth capacitor C5 is grounded.

[0042] Preferably, the W-phase current input terminal IW, the V-phase current input terminal IV and the U-phase current input terminal IU are input with voltage signals converted from current signals by Hall sensors.

[0043] Since the detection principle of V-phase and W-phase current is the same as that of U-phase, they also have their own voltage divider circuits, Hall sensors, comparators and output signals, etc. Therefore, take U-phase as an example to illustrate whether the three-phase current output in the industrial control equipment meets the wave-by-wave current limiting trigger point: after the U-phase current is converted into the corresponding U-phase voltage based on the Hall sensor, the negative voltage is raised through resistors R5 and R6, so that the U-phase voltage is inverted and amplified for comparison with the reference voltage generated by the voltage divider circuit; the raised U-phase voltage is input to the negative input terminal (IN-) of the first comparator, and the positive input terminal (IN+) of the first comparator receives the reference voltage generated by the voltage divider circuit, that is, the comparator high threshold signal; when the U-phase voltage output by the Hall sensor of the U-phase current IU is higher than the comparator high threshold signal REF_H, the negative input terminal of the first comparator When the voltage at the terminal is higher than that at the positive input terminal, the first comparator outputs a low-level signal, which indicates that the current exceeds the safety upper limit; when the U-phase voltage output by the Hall sensor of the U-phase current IU is lower than the comparator low threshold signal REF_L, the first comparator outputs a low-level signal, which indicates that the current is lower than the safety lower limit; the comparator outputs the final signal through the resistor R10; if the current IU is within the safety range, that is, between REF_L and REF_H, the comparator outputs a high level, and determines that the three-phase current does not meet the wave-by-wave current limiting trigger point; if the current exceeds this range, the comparator outputs a low level, and determines that the three-phase current meets the wave-by-wave current limiting trigger point; when the three-phase current meets the wave-by-wave current limiting trigger point, a corresponding pulse signal, that is, a wave-by-wave current limiting trigger signal, will be generated, and sent to the main control programmable logic device of the industrial control equipment for judgment and processing.

[0044] In one embodiment, recording the triggering number of the wave-by-wave current limiting trigger signal specifically includes: when it is detected that the wave-by-wave current limiting trigger signal exists in the current control cycle, obtaining the current triggering number of the wave-by-wave current limiting trigger signal, accumulating the current triggering number, updating and recording the triggering number of the wave-by-wave current limiting trigger signal; when it is detected that the wave-by-wave current limiting trigger signal does not exist in the current control cycle, obtaining the current triggering number of the wave-by-wave current limiting trigger signal, clearing the current triggering number, updating and recording the triggering number of the wave-by-wave current limiting trigger signal.

[0045] Specifically, based on the main control programmable logic device, it is used to detect whether a wave-by-wave current limiting trigger signal is generated in each control cycle.

[0046] Specifically, within the current control cycle, detect whether the wave-by-wave current limiting trigger signal is triggered. If so, obtain the current triggering number of the wave-by-wave current limiting trigger signal under the current control cycle, and accumulate the current triggering number in units of 1 to obtain the accumulated triggering number, and update and record the triggering number of the wave-by-wave current limiting trigger signal based on the accumulated triggering number.

[0047] Specifically, within the current control cycle, detect whether the wave-by-wave current limiting trigger signal is triggered, if not, obtain the current triggering number of the wave-by-wave current limiting trigger signal under the current control cycle, set the current triggering number of the wave-by-wave current limiting trigger signal to zero, and update the triggering number of the wave-by-wave current limiting trigger signal to 0. If the wave-by-wave current limiting trigger signal is re-detected and triggered in a subsequent control cycle, the current triggering number of the wave-by-wave current limiting trigger signal is recounted with 0.

[0048] In one embodiment, it is determined whether the triggering number of the wave-by-wave current limiting trigger signal is not less than a first triggering number threshold, and if so, a wave-by-wave current limiting fault flag is generated; based on the wave-by-wave current limiting fault flag, a whole-machine wave-sealing instruction is generated, and based on the whole-machine wave-sealing instruction, a whole-machine wave-sealing operation is performed on the industrial control equipment.

[0049] Specifically, since the number of triggers will be reset to zero when the wave-by-wave current limiting is not detected to be triggered, it is possible to determine whether the wave-by-wave current limiting trigger signal is detected in multiple consecutive control cycles based on the number of triggers of the wave-by-wave current limiting trigger signal. If so, a wave-by-wave current limiting fault flag is generated and uploaded to the main control microprocessor of the industrial control equipment, so that the main control microprocessor sends it to the HMI display screen or the host computer display after internal logic processing, and at the same time generates a whole-machine wave sealing instruction to perform a wave sealing operation on the processing unit.

[0050] Step 102: When the triggering times meet the triggering times threshold, the wave-by-wave current limiting triggering signal is sent to a processing unit, so that the processing unit performs fault analysis on the wave-by-wave current limiting triggering signal, and executes a corresponding wave blocking strategy based on the fault analysis result.

[0051] In one embodiment, before the triggering number meets the triggering number threshold, the triggering number of the wave-by-wave current limiting trigger signal is also obtained. When the triggering number is less than the first triggering number threshold, it is determined that the triggering number meets the triggering number threshold.

[0052] Specifically, when the triggering number is less than the first triggering number threshold, the wave-by-wave current limiting trigger signal is sent to the processing unit, so that the system can detect potential faults at an early stage and intervene before the fault develops into a more serious problem.

[0053] Preferably, when the industrial control equipment is a cascade-type high-voltage inverter, since the cascade-type high-voltage inverter includes multiple cascaded processing units, the wave-by-wave current limiting trigger signal is sent to each processing unit respectively, so that each processing unit can perform fault analysis on the wave-by-wave current limiting trigger signal respectively. In this way, since each processing unit can operate independently, it can respond to fault conditions more quickly, reduce system delays, and improve the response speed of the entire system; and this method can process the processing units separately according to their actual current conditions, avoiding the problem that traditional wave-by-wave current limiting may cause all units to be instantly blocked, causing phase inconsistency.

[0054] In one embodiment, when the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal, it determines whether the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and determines whether the triggering number of the wave-by-wave current limiting trigger signal is greater than a second triggering number threshold; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the second triggering number threshold, the fault analysis result is output as a short continuous fault; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, the triggering number of the wave-by-wave current limiting trigger signal is greater than the second triggering number threshold, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the first triggering number threshold, the fault analysis result is output as a long continuous fault.

[0055] Specifically, the second triggering number threshold is smaller than the first triggering number threshold.

[0056] Specifically, if after the wave-by-wave current limiting trigger signal is triggered, it is determined that the triggering number of the wave-by-wave current limiting trigger signal does not reach the first triggering number threshold N, the detected wave-by-wave current limiting trigger signal needs to be sent to the processing unit. After arriving at the processing unit, a special fault type identification module analyzes the fault. If it is detected that the wave-by-wave current limiting trigger signal is a wave-by-wave current limiting signal, the processing unit needs to determine whether the current triggering number of the wave-by-wave current limiting trigger signal is within the second triggering number threshold M. If so, a short blocking strategy is adopted; if it is determined that the current triggering number of the wave-by-wave current limiting trigger signal exceeds the second triggering number threshold M, a long blocking strategy is adopted.

[0057] In one embodiment, when the output fault analysis result is a long continuous fault, it is further detected whether the wave-by-wave current limiting trigger signal is triggered in the subsequent control cycle. If so, the long blocking strategy is continued to be adopted; otherwise, the long blocking strategy is adjusted to a short blocking strategy.

[0058] Specifically, if no wave-by-wave current limiting trigger signal appears in the subsequent control cycle, then the next time the wave-by-wave current limiting trigger signal is detected again, the fault analysis of the wave-by-wave current limiting trigger signal is performed again, that is, the short blocking strategy is adopted when the wave-by-wave current limiting trigger signal is detected within M consecutive control cycles. After the number of control cycles that trigger the wave-by-wave current limiting trigger signal exceeds the second control cycle number threshold M, the long blocking strategy is adopted.

[0059] In one embodiment, when determining the corresponding wave-blocking strategy based on the fault analysis result, when the fault analysis result is a short continuous fault, the short wave-blocking strategy is executed; when the fault analysis result is a long continuous fault, the long wave-blocking strategy is executed; wherein the wave-blocking time corresponding to the long wave-blocking strategy is greater than the wave-blocking time corresponding to the short wave-blocking strategy.

[0060] In one embodiment, based on the main control programmable logic device, the triggering number of the wave-by-wave current limiting trigger signal is obtained in real time, and the whole machine blocking threshold is obtained, and the triggering number is compared with the whole machine blocking threshold. If the triggering number is greater than the whole machine blocking threshold, a drive blocking instruction is generated, and the drive blocking instruction is sent to the processing unit to drive the processing unit to block.

[0061] Preferably, the triggering times of the wave-by-wave current limiting triggering signal are also sent to the main control microprocessor MCU in time, and displayed on the host computer and the display screen HMI.

[0062] Example 2, see Figure 2 , Figure 2 is a structural schematic diagram of an embodiment of a semi-dynamic adjustment system for wave-by-wave current limiting provided by the present application, such as Figure 2As shown, the system includes a wave-by-wave current limiting triggering module 201 and a wave blocking strategy execution module 202 .

[0063] The wave-by-wave current limiting trigger module 201 is used to generate a wave-by-wave current limiting trigger signal when it is detected that the current output in the industrial control device meets the wave-by-wave current limiting trigger point, and record the number of times the wave-by-wave current limiting trigger signal is triggered.

[0064] The wave blocking strategy execution module 202 is used to send the wave-by-wave current limiting trigger signal to the processing unit when the trigger number meets the trigger number threshold, so that the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal and executes the corresponding wave blocking strategy based on the fault analysis result.

[0065] In one embodiment, the wave-by-wave current limiting trigger module 201 is used to generate a wave-by-wave current limiting trigger signal when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point, specifically including: obtaining the current output in the industrial control equipment, converting the current into a voltage signal to obtain a corresponding voltage signal; inputting the voltage signal into a comparator so that the comparator compares the voltage signal with a comparator threshold signal, wherein the comparator threshold signal includes a comparator high threshold signal and a comparator low threshold signal; when it is detected that the voltage signal is greater than the comparator high threshold signal, or when it is detected that the voltage signal is less than the comparator low threshold signal, it is determined that the current meets the wave-by-wave current limiting trigger point; when it is detected that the voltage signal is less than the comparator high threshold signal, or when it is detected that the voltage signal is greater than the comparator low threshold signal, it is determined that the current does not meet the wave-by-wave current limiting trigger point.

[0066] In one embodiment, the wave-by-wave current limiting trigger module 201 is used to record the triggering number of the wave-by-wave current limiting trigger signal, specifically including: when it is detected that the wave-by-wave current limiting trigger signal exists in the current control cycle, the current triggering number of the wave-by-wave current limiting trigger signal is obtained, and the current triggering number is accumulated, and the triggering number of the wave-by-wave current limiting trigger signal is updated and recorded; when it is detected that the wave-by-wave current limiting trigger signal does not exist in the current control cycle, the current triggering number of the wave-by-wave current limiting trigger signal is obtained, and the current triggering number is cleared, and the triggering number of the wave-by-wave current limiting trigger signal is updated and recorded.

[0067] In one embodiment, the wave blocking strategy execution module 202 is used to, before the trigger number meets the trigger number threshold, also include: obtaining the trigger number of the wave-by-wave current limiting trigger signal, and when the trigger number is less than the first trigger number threshold, determining that the trigger number meets the trigger number threshold.

[0068] In one embodiment, the wave-by-wave current limiting trigger module 201 is used to record the number of triggering times of the wave-by-wave current limiting trigger signal, and further includes: determining whether the number of triggering times of the wave-by-wave current limiting trigger signal is not less than a first triggering time threshold, and if so, generating a wave-by-wave current limiting fault flag; based on the wave-by-wave current limiting fault flag, generating a whole-machine wave sealing instruction, and based on the whole-machine wave sealing instruction, performing a whole-machine wave sealing operation on the industrial control equipment.

[0069] In one embodiment, the processing unit in the wave blocking strategy execution module 202 performs fault analysis on the wave-by-wave current limiting trigger signal, specifically including: determining whether the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and determining whether the triggering number of the wave-by-wave current limiting trigger signal is greater than a second triggering number threshold; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the second triggering number threshold, outputting a fault analysis result as a short continuous fault; when it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, the triggering number of the wave-by-wave current limiting trigger signal is greater than the second triggering number threshold, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the first triggering number threshold, outputting a fault analysis result as a long continuous fault.

[0070] In one embodiment, the blocking strategy execution module 202 is used to determine the corresponding blocking strategy based on the fault analysis result, specifically including: when the fault analysis result is a short continuous fault, executing the short blocking strategy; when the fault analysis result is a long continuous fault, executing the long blocking strategy; wherein the blocking time corresponding to the long blocking strategy is greater than the blocking time corresponding to the short blocking strategy.

[0071] The semi-dynamic adjustment system for wave-by-wave current limiting can implement the semi-dynamic adjustment method for wave-by-wave current limiting in the method embodiment. The options in the method embodiment are also applicable to this embodiment and will not be described in detail here.

[0072] like Figure 5 As shown, Figure 5 It is a structural diagram of an electronic device provided by the present application; it includes a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114, and the memory 113 is used to store computer programs.

[0073] In one embodiment of the present application, the processor 111 is used to implement the semi-dynamic adjustment method of wave-by-wave current limiting provided by any one of the aforementioned method embodiments when executing the program stored in the memory 113.

[0074] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the semi-dynamic adjustment method of wave-by-wave current limiting provided in any of the aforementioned method embodiments are implemented.

[0075] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0077] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0078] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A semi-dynamic adjustment method for wave-by-wave current limiting, characterized in that: include: When it is detected that the current outputted from the industrial control device meets the wave-by-wave current limiting trigger point, a wave-by-wave current limiting trigger signal is generated, and the number of times the wave-by-wave current limiting trigger signal is triggered is recorded; When the triggering times meet the triggering times threshold, the wave-by-wave current limiting triggering signal is sent to the processing unit, so that the processing unit performs fault analysis on the wave-by-wave current limiting triggering signal, and executes a corresponding wave blocking strategy based on the fault analysis result.

2. The method according to claim 1, characterized in that When it is detected that the output current of the industrial control equipment meets the wave-by-wave current limiting trigger point, a wave-by-wave current limiting trigger signal is generated, which specifically includes: Obtaining the current outputted by the industrial control device, and performing voltage signal conversion processing on the current to obtain a corresponding voltage signal; Inputting the voltage signal into a comparator so that the comparator compares the voltage signal with a comparator threshold signal, wherein the comparator threshold signal includes a comparator high threshold signal and a comparator low threshold signal; When it is detected that the voltage signal is greater than the comparator high threshold signal, or when it is detected that the voltage signal is less than the comparator low threshold signal, it is determined that the current meets the wave-by-wave current limiting trigger point; When it is detected that the voltage signal is less than the comparator high threshold signal, or when it is detected that the voltage signal is greater than the comparator low threshold signal, it is determined that the current does not meet the wave-by-wave current limiting trigger point.

3. The method according to claim 1, characterized in that: Recording the triggering times of the wave-by-wave current limiting trigger signal, specifically including: When it is detected that the wave-by-wave current limiting trigger signal exists in the current control period, the current triggering number of the wave-by-wave current limiting trigger signal is obtained, and the current triggering number is accumulated, and the triggering number of the wave-by-wave current limiting trigger signal is updated and recorded; When it is detected that the wave-by-wave current limiting trigger signal does not exist in the current control period, the current triggering number of the wave-by-wave current limiting trigger signal is obtained, the current triggering number is cleared, and the triggering number of the wave-by-wave current limiting trigger signal is updated and recorded.

4. The method according to claim 1, characterized in that: When the triggering times meet the triggering times threshold, the method further includes: The triggering number of the wave-by-wave current limiting trigger signal is obtained, and when the triggering number is less than a first triggering number threshold, it is determined that the triggering number meets the triggering number threshold.

5. The method according to claim 1, characterized in that: After recording the triggering times of the wave-by-wave current limiting trigger signal, the method further includes: Determine whether the triggering number of the wave-by-wave current limiting trigger signal is not less than a first triggering number threshold, and if so, generate a wave-by-wave current limiting fault flag; Based on the wave-by-wave current limiting fault identifier, a whole-machine wave-sealing instruction is generated, and based on the whole-machine wave-sealing instruction, a whole-machine wave-sealing operation is performed on the industrial control equipment.

6. The method according to claim 1, characterized in that: The processing unit performs fault analysis on the wave-by-wave current limiting trigger signal, specifically including: Determine whether the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and determine whether the triggering number of the wave-by-wave current limiting trigger signal is greater than a second triggering number threshold; When it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the second triggering number threshold, outputting the fault analysis result as a short continuous fault; When it is determined that the wave-by-wave current limiting trigger signal is the wave-by-wave current limiting signal, the triggering number of the wave-by-wave current limiting trigger signal is greater than the second triggering number threshold, and the triggering number of the wave-by-wave current limiting trigger signal is not greater than the first triggering number threshold, the output fault analysis result is a long continuous fault.

7. The method according to claim 1, characterized in that: Based on the fault analysis results, determine the corresponding blocking strategy, including: When the fault analysis result is a short continuous fault, a short wave blocking strategy is executed; When the fault analysis result is a long continuous fault, a long wave blocking strategy is executed; The blocking time corresponding to the long blocking strategy is greater than the blocking time corresponding to the short blocking strategy.

8. A semi-dynamic modulation system with wave-by-wave current limiting, characterized in that: include: Wave-by-wave current limiting trigger module and wave blocking strategy execution module; The wave-by-wave current limiting trigger module is used to generate a wave-by-wave current limiting trigger signal when it is detected that the current output in the industrial control equipment meets the wave-by-wave current limiting trigger point, and record the number of times the wave-by-wave current limiting trigger signal is triggered; The wave-closing strategy execution module is used to send the wave-by-wave current limiting trigger signal to the processing unit when the trigger number meets the trigger number threshold, so that the processing unit performs fault analysis on the wave-by-wave current limiting trigger signal and executes the corresponding wave-closing strategy based on the fault analysis result.

9. An electronic device, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is used to implement the semi-dynamic adjustment method of wave-by-wave current limiting as described in any one of claims 1-7 when executing the program stored in the memory.

10. A computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the semi-dynamic adjustment method of wave-by-wave current limiting according to any one of claims 1 to 7 of the present application.

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