Selective action control method, device and system for blasting type rapid current limiter and storage medium

Abstract

The invention discloses a selective action control method, device and system for a blasting type rapid current limiter and a storage medium, and belongs to the technical field of short-circuit current limiting. The method comprises the following steps: acquiring a setting value of the current of the blasting type rapid current limiter; when the current flows through the blasting type quick current limiter, acquiring data of the current flowing through the blasting type quick current limiter, and judging whether the current data is greater than a setting value or not; after it is judged that the blasting type rapid current limiter needs to be prepared for blasting, whether a port of the blasting type rapid current limiter breaks down or not is judged, and a forbidding signal is sent to the adjacent blasting type rapid current limiter when the port breaks down; if the blasting type rapid flow limiter needs to be prepared for blasting and does not receive the forbidding signal, a blasting instruction is output to control the blasting type rapid flow limiter to be blasted. The blasting action selection of the blasting type rapid current limiter is controlled, so that the short-circuit current is limited, and the control accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of short-circuit current limiting, and in particular relates to a method, device, system and storage medium for selective action control of an explosive fast current limiter. Background Art

[0002] There are two mechanisms by which short-circuit current can cause damage to electrical equipment. One is the instantaneous peak value of the current, which corresponds to the electrodynamic effect of the current and is called the dynamic stability of the electrical equipment. The other is the effective value of the current, which corresponds to the thermal effect of the current and is called the thermal stability of the electrical equipment. The main feature of the explosive fast current limiter (FCL) is that it can solve the problem of abnormally high expected short-circuit current by rapid explosion. At the beginning of the rise of the first half-wave of the short-circuit current, it is limited so that it cannot reach the peak value of the first half-wave. It is mainly composed of a bursting tube with very low resistance and a fast fuse in parallel, and the resistance of the former is much smaller than that of the latter. After the bursting tube is ignited and exploded, the current is forced to transfer to the fast fuse branch. This process takes less than 1 millisecond. The short-circuit current is limited by the large impedance of the fast fuse, and when the current passes the point, the fast fuse will break the short-circuit current.

[0003] Compared with other fault current limiters that can only solve the thermal stability problem, the advantage of the explosive fast current limiter is that it can solve both the thermal stability problem and the dynamic stability problem. However, its disadvantage is that once it has been actuated once, the explosive fast current limiter body is no longer usable. Therefore, compared with other types of fault current limiters that can be used repeatedly, the explosive fast current limiter requires a different action control strategy to improve its control accuracy and reduce the economic loss after the explosive fast current limiter explodes. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method, device, system and storage medium for selective action control of an explosive fast current limiter, so as to realize the control of the explosive action selection of the explosive fast current limiter, so as to limit the short-circuit current and improve the control accuracy.

[0005] The present invention provides the following technical solutions:

[0006] In a first aspect, a method for selective action control of an explosive fast current limiter is provided, wherein a set value of the current of the explosive fast current limiter is obtained; when current flows through the explosive fast current limiter, current data flowing through the explosive fast current limiter is obtained, and it is determined whether the current data is greater than the set value; if the current data is greater than the set value, it is determined that the explosive fast current limiter needs to be prepared for explosion; otherwise, it is determined that the explosive fast current limiter does not need to be prepared for explosion; after it is determined that the explosive fast current limiter needs to be prepared for explosion, the port current data of the explosive fast current limiter is obtained, and it is determined whether a port of the explosive fast current limiter fails according to the port current data and the current data of the explosive fast current limiter, and a prohibition signal is sent to the adjacent explosive fast current limiter when a port fails; if the explosive fast current limiter needs to be prepared for explosion and no prohibition signal is received, an explosion instruction is output to control the explosive fast current limiter to explode.

[0007] As an optional technical solution of the present invention, after obtaining the setting value of the explosive fast current limiter current, the positive direction of the current flowing through the explosive fast current limiter is also obtained, and the positive direction of the current of the explosive fast current limiter flows from the input end to the output end.

[0008] As an optional technical solution of the present invention, the port of the explosive fast current limiter includes an input end and an output end; the port current data of the explosive fast current limiter includes input end current data and output end current data; the input end current data and the output end current data both include current value and current direction.

[0009] As an optional technical solution of the present invention, judging whether a port of the explosive fast current limiter fails according to the port current data and the current data of the explosive fast current limiter includes:

[0010] If a fault occurs at the input end of the explosive fast current limiter, a prohibition signal is sent to the explosive fast current limiter adjacent to its output end; if a fault occurs at the output end of the explosive fast current limiter, a prohibition signal is sent to the explosive fast current limiter adjacent to its input end.

[0011] As an optional technical solution of the present invention, the step of determining whether a port of the explosive rapid current limiter fails comprises:

[0012] The correlation between the current of the explosive fast current limiter and the port current is calculated as follows:

[0013] ;

[0014] in, represents the correlation coefficient, represents the total number of sampling points, represents the sampling point of the i-th current, represents the sampling point of the i-th port current, represents the standard deviation of the current, represents the standard deviation of the port current, represents the mean value of the current, Indicates the mean value of the port current;

[0015] If the correlation coefficient r of the number of consecutive set values ​​is greater than 0.75, it is judged that a fault occurs at the output end; if the correlation coefficient r of the number of consecutive set values ​​is less than -0.75, it is judged that a fault occurs at the input end.

[0016] As an optional technical solution of the present invention, the method of determining whether a port of the explosive fast current limiter is faulty further includes: making a phase difference between the current of the explosive fast current limiter and the port current, and if the phase difference is less than or equal to 15°, determining that a fault occurs at the output end; if the phase difference is within 165°~195°, determining that a fault occurs at the input end.

[0017] As an optional technical solution of the present invention, it also includes: if the explosive fast current limiter receives a prohibition signal, no explosive instruction is sent to the explosive fast current limiter.

[0018] In a second aspect, a selective action control device for an explosive fast current limiter is provided, comprising: a data acquisition module for acquiring a setting value of a current of the explosive fast current limiter;

[0019] The explosion judgment module is used to obtain the current data flowing through the explosion-type fast current limiter when current flows through the explosion-type fast current limiter, and judge whether the current data is greater than the setting value; if the current data is greater than the setting value, it is judged that the explosion-type fast current limiter needs to be prepared for explosion; otherwise, it is judged that the explosion-type fast current limiter does not need to be prepared for explosion;

[0020] A fault judgment module is used to obtain the port current data of the explosive fast current limiter after judging that the explosive fast current limiter needs to be prepared for explosion, judge whether the port of the explosive fast current limiter fails according to the port current data and current data of the explosive fast current limiter, and send a prohibition signal to the adjacent explosive fast current limiter when the port fails;

[0021] The instruction sending module is used to output an explosion instruction to control the explosion-type rapid current limiter to explode if the explosion-type rapid current limiter needs to prepare for explosion and no prohibition signal is received.

[0022] In a third aspect, a selective action control system for an explosive rapid current limiter is provided, comprising a plurality of explosive rapid current limiters, each of which comprises:

[0023] A current acquisition unit, used to collect current data and port current data of the explosive fast current limiter;

[0024] A communication unit, used to receive a prohibition signal from an adjacent explosive fast current limiter or send a prohibition signal to an adjacent explosive fast current limiter;

[0025] A processing unit, configured to execute the method for selectively controlling the explosive rapid current limiter according to the first aspect;

[0026] The blasting execution unit is used to execute blasting current limiting according to the blasting instruction output by the processing unit.

[0027] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the steps of the method for selective action control of the explosive fast current limiter described in the first aspect are implemented.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a method for selectively controlling the action of an explosive fast current limiter. The method determines whether the explosive fast current limiter needs to be prepared for explosion and whether a port of the explosive fast current limiter fails by using the current of the explosive fast current limiter and the current of its port. The method sends a prohibition signal to the adjacent explosive fast current limiter of the current explosive fast current limiter, thereby controlling the explosion action selection of the explosive fast current limiter, limiting the short-circuit current, improving the control accuracy, and reducing the economic losses caused by erroneous explosions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flow chart of a selective action control method of an explosive rapid current limiter in an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of two main transformers in parallel in an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of a new power supply with expanded capacity and an old system in parallel in an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of three main transformers in parallel in an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of grid connection of multiple systems through an explosive fast current limiter in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0036] Example 1

[0037] This embodiment provides a method for selectively controlling the action of an explosive rapid current limiter. Figure 1 As shown, including:

[0038] Step 1: Define the setting value of the current flowing through the burst type fast current limiter.

[0039] In this step, the positive direction of the current flowing through the explosive fast current limiter is obtained.

[0040] When current flows through the explosive fast current limiter, the explosive fast current limiter presents a very low resistance. The resistance of the bursting tube is only a few micro-ohms under normal current, which is equivalent to a section of metal wire.

[0041] Step 2: When current flows through the explosive fast current limiter, obtain the current data flowing through the explosive fast current limiter, and determine whether the current data is greater than the set value; if the current data is greater than the set value, determine that the explosive fast current limiter needs to prepare for explosion; otherwise, determine that the explosive fast current limiter does not need to prepare for explosion.

[0042] In this embodiment, the current flowing through the explosive fast current limiter that is greater than the set value is defined as the short-circuit current.

[0043] Step three: after determining that the explosive fast current limiter needs to be prepared for explosion, obtain the port current data of the explosive fast current limiter, determine whether the port of the explosive fast current limiter fails according to the port current data and current data of the explosive fast current limiter, and send a prohibition signal to the adjacent explosive fast current limiter when the port fails.

[0044] Specifically, the port of the explosive fast current limiter includes an input end and an output end, and the positive direction of the current of the explosive fast current limiter flows from the input end to the output end. The port current data of the explosive fast current limiter includes input end current data and output end current data; the input end current data and the output end current data both include current value and current direction. If the input end of the explosive fast current limiter fails, a prohibition signal is sent to the explosive fast current limiter adjacent to its output end; if the output end of the explosive fast current limiter fails, a prohibition signal is sent to the explosive fast current limiter adjacent to its input end.

[0045] This embodiment provides two methods for determining whether the fault occurs at the input end or the output end.

[0046] Method 1:

[0047] The correlation between the current of the explosive fast current limiter and the port current is calculated as follows:

[0048] ;

[0049] in, represents the correlation coefficient, represents the total number of sampling points, represents the sampling point of the i-th current, represents the sampling point of the i-th port current, represents the standard deviation of the current, represents the standard deviation of the port current, represents the mean value of the current, Indicates the average value of the port current.

[0050] In this embodiment, 12 sampling points (sampling frequency is 20kHz) are selected in each time sliding window to calculate the correlation coefficient, and continuous correlation calculation is performed at the sliding speed of one sampling point to continuously calculate new correlation coefficients. If the correlation coefficient r is greater than 0.75, it is considered that the current of the explosive fast current limiter and the port current are in phase, and the fault occurs at the output end; if the correlation coefficient r is less than -0.75, it is considered that the current of the explosive fast current limiter and the port current are in anti-phase, and the fault occurs at the input end.

[0051] Since only relying on one correlation coefficient r as a criterion is not reliable and stable enough, this embodiment sets 15 consecutive correlation coefficients as the basis for judgment. If the 15 consecutive correlation coefficients r are greater than 0.75, it is judged that the output end is faulty; if the 15 consecutive correlation coefficients r are less than -0.75, it is judged that the input end is faulty.

[0052] Method 2:

[0053] The phase difference between the current of the explosive fast current limiter and the port current is taken. If the phase difference is less than or equal to 15°, it is judged that a fault occurs at the output end; if the phase difference is within 165°~195°, it is judged that a fault occurs at the input end.

[0054] Step 4: If the explosive fast current limiter needs to prepare for explosion and no prohibition signal is received, an explosion instruction is output to control the explosive fast current limiter to explode.

[0055] Specifically, if the explosive fast current limiter receives a prohibition signal, no explosion instruction is sent to the explosive fast current limiter. If the explosive fast current limiter does not receive a prohibition signal, and the explosive fast current limiter needs to prepare for explosion, an explosion control command is sent to the explosion tube of the explosive fast current limiter, and the explosion tube will explode within microseconds (several microseconds to tens of microseconds), transferring the short-circuit current to the fast fuse connected in parallel with the explosion tube. The fast fuse presents a large impedance, thereby limiting the short-circuit current. The final short-circuit current is interrupted by the fast fuse when the current passes through zero point and the arc is extinguished.

[0056] Example 2

[0057] This embodiment provides a selective action control device for an explosive rapid current limiter, wherein each adjacent explosive rapid current limiter is equipped with a control system. The control system includes:

[0058] A data acquisition module, used to obtain the setting value of the current of the explosive fast current limiter;

[0059] The explosion judgment module is used to obtain the current data flowing through the explosion-type fast current limiter when current flows through the explosion-type fast current limiter, and judge whether the current data is greater than the setting value; if the current data is greater than the setting value, it is judged that the explosion-type fast current limiter needs to be prepared for explosion; otherwise, it is judged that the explosion-type fast current limiter does not need to be prepared for explosion;

[0060] A fault judgment module is used to obtain the port current data of the explosive fast current limiter after judging that the explosive fast current limiter needs to be prepared for explosion, judge whether the port of the explosive fast current limiter fails according to the port current data and current data of the explosive fast current limiter, and send a prohibition signal to the adjacent explosive fast current limiter when the port fails;

[0061] The instruction sending module is used to output an explosion instruction to control the explosion-type rapid current limiter to explode if the explosion-type rapid current limiter needs to prepare for explosion and no prohibition signal is received.

[0062] Example 3

[0063] This embodiment provides a selective action control system for an explosive rapid current limiter, including a plurality of explosive rapid current limiters, each of which includes:

[0064] A current acquisition unit, used to collect current data and port current data of the explosive fast current limiter;

[0065] A communication unit, used to receive a prohibition signal from an adjacent explosive fast current limiter or send a prohibition signal to an adjacent explosive fast current limiter;

[0066] A processing unit, used to execute the selective action control method of the explosive fast current limiter described in Example 1;

[0067] The blasting execution unit is used to execute blasting current limiting according to the blasting instruction output by the processing unit.

[0068] Example 4

[0069] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps of the method for selectively controlling the action of the explosive fast current limiter described in Embodiment 1 are implemented.

[0070] Example 5

[0071] Based on Example 1, this embodiment provides a distributed control method for partitioning a distribution network using an explosive fast current limiter in four different scenarios.

[0072] Scenario 1:

[0073] like Figure 2 As shown in the figure, when two main transformers are connected through the explosive fast current limiter FCL1, when the short circuit occurs on the load side A of the main transformer 1 and the load side B of the main transformer 2, as long as it exceeds the set setting value, FCL1 should act. The details are as follows:

[0074] In this scenario, the positive direction of the current can be directed to the transformer 1 side or the transformer 2 side. In this embodiment, the transformer 1 side is the input end, the transformer 2 side is the output end, the input end current data includes the current of the transformer 1, and the output end current data includes the current of the transformer 2. Since there is only one explosive fast current limiter FCL1 in this application scenario and there is no adjacent explosive fast current limiter, the prohibition signal is neither received nor sent.

[0075] When a short circuit occurs at point A, transformer 2 injects current into point A through FCL1, obtains the current of FCL1, and sends a blasting command if the current exceeds the set value, detonates the blasting tube of FCL1, and enters the current limiting breaking state. When a short circuit occurs at point B, transformer 1 injects current into point B through FCL1, and its control situation is exactly the same as when a short circuit occurs at point A.

[0076] Scenario 2:

[0077] like Figure 3 As shown, Area B is the new power supply system (Phase II project), and Area A is the old power supply system (Phase I project). The total short-circuit current of the Phase I project system is relatively small (such as 25kA), and the breaking capacity of all feeder circuit breakers can meet the requirements of the Phase I project (such as 31.5kA). If the Phase II project is not considered, the system is safe in terms of short-circuit current breaking. Many years later, due to production needs, a Phase II project was added. The Phase II project may be, but is not limited to, new energy. Its total short-circuit current is assumed to be 10kA in total, and the breaking capacity of all feeder circuit breakers in the Phase II is selected to be 40kA. In order to ensure the voltage quality and power supply reliability, Phase I and Phase II need to be networked, that is, electrically connected through the busbar. Obviously, in this way, the breaking capacity of all circuit breakers in Phase I faces the problem of insufficient capacity, so it is considered to install an explosive fast current limiter FCL1 at the tie line or busbar position. When a short circuit occurs in Phase I, FCL1 quickly breaks and de-energizes the system. But when a short circuit occurs in Phase II, FCL action is obviously not required. There is a problem of selective action of the current limiter here.

[0078] In this scenario, the positive direction of the current points to the generator G side, that is, from area A to area B. When the positive short-circuit current flows, FCL1 does not act, and when the reverse short-circuit current flows, FCL1 acts. The transformer 1 side is the input end, and the generator G side is the output end. The input end current data includes the current of transformer 1. , the output current data includes the current of the generator G . Determine the current of FCL1 Whether the set value is reached. Since there is only one explosive fast current limiter in this application scenario and no adjacent explosive fast current limiter, it neither receives nor sends a prohibition signal.

[0079] When a short circuit occurs in the load of area A, the generator G injects current into point A through FCL1 and obtains the current of FCL1. , if the current is judged The size has exceeded the set value, and then compare the current and , The criterion for judging whether two current signals are almost of the same polarity is that the correlation coefficient of the two current signals is r>0.75, and the criterion for judging whether two current signals are almost of the opposite polarity is that the correlation coefficient of the two current signals is r<-0.75. , Almost the same polarity, and , If the polarity is reversed, it is determined that FCL1 has flowed a reverse short-circuit current, and a blasting command is sent to ignite the blasting tube of FCL1 to enter the current limiting disconnection state. If a short-circuit fault occurs at point B, transformer 1 injects current into point B through FCL1 to obtain the current of FCL1. , current If the current is greater than the set value, and , For comparison, and , Almost the same polarity, it can be judged that FCL1 has flowed a forward short-circuit current, and no blasting command is sent at this time.

[0080] Scenario 3:

[0081] like Figure 4 As shown in the figure, when three main transformers are running in parallel, if a short circuit occurs on the load side at point A, only FCL1 is required to be actuated; if a short circuit occurs on the load side at point B, both FCL1 and FCL2 are required to be actuated; if a short circuit occurs on the load side at point C, only FCL2 is required to be actuated. Here, the actions of FCL1 and FCL2 are selective to a certain extent. In this distribution system, three main transformers are connected through two explosive fast current limiters, and each FCL is equipped with an independent control system.

[0082] In this scenario, the positive direction of FCL1 current is from transformer 1 to transformer 2. When the short-circuit current in the positive and reverse directions is detected, the preparation for blasting command will be output. Whether the blasting is realized depends on whether the prohibition signal is received. When the prohibition signal is not received, the preparation for blasting command is converted to the blasting command. In this scenario, the transformer 1 side is the input end, and the transformer 2 side is the output end. The input end current data includes the current of transformer 1. , the output current data includes the current of transformer 2 . Determine the current of FCL1 Whether the set value is reached.

[0083] When a short circuit occurs in the load of area A, transformer 2 and transformer 3 inject current into point A through FCL1 and FCL2 to obtain the current of FCL1. , if the current is judged The current has exceeded the set value. and , Polarity relationship, when point A is short-circuited , Almost the same polarity, and , Reverse polarity can be used to determine that FCL1 flows through a reverse short-circuit current. If the short-circuit fault occurs at the input end of FCL1, a prohibition signal is sent to FCL2 adjacent to the output end of FCL1. FCL1 does not receive the prohibition signal from FCL2, and a blasting command is sent to FCL1 to blast the blasting tube of FCL1 into a current-limiting disconnection state. If a short-circuit fault occurs at point B, transformer 1 injects current into point B through FCL1, and transformer 3 injects current into point B through FCL2 to obtain the current of FCL1. , current Greater than the set value, in this case, the current and , For comparison, and , Almost the same polarity, it can be determined that FCL1 has flowed through a forward short-circuit current. The short circuit occurs at the output end of FCL1. There is no other current limiter at the input end of FCL1, so there is no need to send a prohibition signal, but it is necessary to wait for a prohibition signal from other current limiters. In this scenario, FCL1 will not receive a prohibition signal from other FCLs, and a blasting command will be sent to FCL1. If a short circuit occurs at point C, transformer 1 and transformer 2 inject current into point C through FCL1 and FCL2 to obtain the current of FCL1. , it is judged that a forward short-circuit current flows through FCL1, and the short circuit occurs at the output end of FCL1. At the same time, FCL2 will also detect the short-circuit current and judge that the short circuit occurs at the output end of FCL2. It will send a prohibition signal to FCL1 connected to its input end. FCL1 receives this prohibition signal and will not send a blasting command.

[0084] The control logic of FCL2 is similar to that of FCL1, and the two are in completely symmetrical positions, so they will not be described here.

[0085] Scenario 4:

[0086] like Figure 5 As shown, when a short circuit occurs in system 1, only FCL1 needs to be activated, when a short circuit occurs in system 2, only FCL2 needs to be activated, and when a short circuit occurs in system 3, only FCL3 needs to be activated. The current limiter needs to meet the above action selectivity. There are three explosive fast current limiters in the system, and the position structures of the three are completely symmetrical. FCL1 is used as an example for explanation.

[0087] The positive direction of FCL1 current flows out from system 1. When the short-circuit current in the positive and reverse directions is detected, the preparation for blasting command will be output. Whether the blasting is realized also depends on whether the prohibition signal is received. When the prohibition signal is not received, the preparation for blasting command is converted into a blasting command. System 1 is the input end, and FCL2 and FCL3 are connected to the output end. There is no external input current at the input end, and the output end current data includes the current of system 2 and system 3. , . Determine the current of FCL1 Whether the size reaches the set value.

[0088] When a fault occurs in system 1, obtain the current of FCL1 , and the current Greater than the set value, judge , Same polarity, and and , The polarity is opposite, and the short circuit fault occurs at the input end of FCL1, giving a blasting preparation signal and sending a prohibition signal to FCL2 and FCL3 connected to its output end. FCL1 will not receive the prohibition signal sent by other FCLs, and the blasting preparation signal is converted into a blasting command and sent to the FCL1 blasting tube. When a fault occurs in system 2, the current of FCL1 is obtained. , current Greater than the set value, , Same polarity and The polarity is opposite. The short-circuit fault occurs at the output end of FCL1, giving a blasting preparation signal. There is no current limiter connected to the input end of FCL1, so there is no need to send a prohibition signal. However, FCL1 will receive the prohibition signal sent by FCL2, and the blasting preparation signal cannot be converted into a blasting command. When system 3 fails, the situation is similar to that of system 2, except that FCL1 will receive the prohibition signal sent by FCL3. In an extremely rare case, if a short-circuit fault occurs at the middle connection of the three explosive fast current limiters, FCL1 can determine that a short-circuit fault has occurred, and FCL1 will not receive the prohibition signal sent by the other two explosive fast current limiters. The blasting preparation signal will be converted into a blasting command and sent to the FCL1 blasting tube.

[0089] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0090] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0091] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0092] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0093] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for selectively controlling the action of an explosive rapid current limiter, characterized in that: include: Obtaining a setting value of the current of the explosive fast current limiter; When current flows through the explosive fast current limiter, current data flowing through the explosive fast current limiter is obtained, and it is determined whether the current data is greater than the set value; if the current data is greater than the set value, it is determined that the explosive fast current limiter needs to be prepared for explosion; otherwise, it is determined that the explosive fast current limiter does not need to be prepared for explosion; After determining that the explosive fast current limiter needs to be prepared for explosion, obtaining the port current data of the explosive fast current limiter, determining whether the port of the explosive fast current limiter fails according to the port current data and the current data of the explosive fast current limiter, and sending a prohibition signal to an adjacent explosive fast current limiter when a port fails; If the explosive fast current limiter needs to prepare for explosion and no prohibition signal is received, an explosion instruction is output to control the explosive fast current limiter to explode.

2. The method for selectively controlling the explosive rapid current limiter according to claim 1, characterized in that: After obtaining the setting value of the current of the explosive fast current limiter, the positive direction of the current flowing through the explosive fast current limiter is also obtained.

3. The method for selectively controlling the explosive rapid current limiter according to claim 2, characterized in that: The port of the explosive fast current limiter includes an input end and an output end, and the positive direction of the current of the explosive fast current limiter flows from the input end to the output end; The port current data of the explosive fast current limiter includes input terminal current data and output terminal current data; The input end current data and the output end current data both include current value and current direction.

4. The method for selectively controlling the explosive rapid current limiter according to claim 3, characterized in that: The method of judging whether a port of the explosive fast current limiter fails according to the port current data and the current data of the explosive fast current limiter comprises: If a fault occurs at the input end of the explosive fast current limiter, a prohibition signal is sent to the explosive fast current limiter adjacent to its output end; if a fault occurs at the output end of the explosive fast current limiter, a prohibition signal is sent to the explosive fast current limiter adjacent to its input end.

5. The method for selectively controlling the explosive rapid current limiter according to claim 1, characterized in that: The determining whether a port of the explosive rapid current limiter fails comprises: The correlation between the current of the explosive fast current limiter and the port current is calculated as follows: ； in, represents the correlation coefficient, represents the total number of sampling points, represents the sampling point of the i-th current, represents the sampling point of the i-th port current, represents the standard deviation of the current, represents the standard deviation of the port current, represents the mean value of the current, Indicates the mean value of the port current; If the correlation coefficient r of the number of consecutive set values ​​is greater than 0.75, it is judged that a fault occurs at the output end; if the correlation coefficient r of the number of consecutive set values ​​is less than -0.75, it is judged that a fault occurs at the input end.

6. The method for selectively controlling the explosive rapid current limiter according to claim 5, characterized in that: The step of determining whether a port of the explosive fast current limiter fails also includes: The phase difference between the current of the explosive fast current limiter and the port current is taken. If the phase difference is less than or equal to 15°, it is judged that a fault occurs at the output end; if the phase difference is within 165°~195°, it is judged that a fault occurs at the input end.

7. The method for selectively controlling the explosive rapid current limiter according to claim 1, characterized in that: Also includes: If the explosive fast current limiter receives a prohibition signal, no explosive instruction is sent to the explosive fast current limiter.

8. A selective action control device for an explosive rapid current limiter, characterized in that: include: A data acquisition module, used to obtain the setting value of the current of the explosive fast current limiter; The explosion judgment module is used to obtain the current data flowing through the explosion-type fast current limiter when current flows through the explosion-type fast current limiter, and judge whether the current data is greater than the setting value; if the current data is greater than the setting value, it is judged that the explosion-type fast current limiter needs to be prepared for explosion; Otherwise, it is determined that the explosive fast current limiter does not need to be prepared for explosion; A fault judgment module is used to obtain the port current data of the explosive fast current limiter after judging that the explosive fast current limiter needs to be prepared for explosion, judge whether the port of the explosive fast current limiter fails according to the port current data and current data of the explosive fast current limiter, and send a prohibition signal to the adjacent explosive fast current limiter when the port fails; The instruction sending module is used to output an explosion instruction to control the explosion-type rapid current limiter to explode if the explosion-type rapid current limiter needs to prepare for explosion and no prohibition signal is received.

9. A selective action control system for an explosive rapid current limiter, characterized in that: It includes multiple explosive fast flow limiters, each of which includes: A current acquisition unit, used to collect current data and port current data of the explosive fast current limiter; A communication unit, used to receive a prohibition signal from an adjacent explosive fast current limiter or send a prohibition signal to an adjacent explosive fast current limiter; A processing unit, used to execute the selective action control method of the explosive fast current limiter according to any one of claims 1 to 7; The blasting execution unit is used to execute blasting current limiting according to the blasting instruction output by the processing unit.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method for selectively controlling the explosive fast current limiter according to any one of claims 1 to 7 are implemented.

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