Differential direct jump method, terminal equipment and computer readable storage medium

Abstract

The invention is suitable for the technical field of electric power, and particularly relates to a differential direct jump method, terminal equipment and a computer readable storage medium, and the method comprises the steps: calculating current parameters of two ends of a target line; according to the current parameter, carrying out preset condition detection on the target line to obtain a detection result; wherein the preset condition comprises a plurality of sub-conditions; under the condition that the detection result shows that the target line meets the preset condition, controlling the differential direct jump action of the target line; wherein meeting of the preset condition refers to meeting of at least three sub-conditions. In the embodiment of the invention, by setting multiple judgment conditions, when the power transmission line meets the multiple judgment conditions, the differential direct trip action is controlled, so that the condition of differential direct trip misoperation can be effectively reduced, the sensitivity of differential protection is improved, and the safety and reliability of the power transmission line are improved.

Description

Technical Field

[0001] The present application belongs to the field of electric power technology, and in particular, relates to a differential direct trip method, a terminal device and a computer-readable storage medium. Background Art

[0002] Transmission lines are a basic component of the power grid. They are widely distributed and numerous, and are often affected by various geographical and climatic environments. Line faults generally have multiple forms such as single-phase grounding, two-phase grounding short circuit, two-phase short circuit and three-phase short circuit. Among them, single-phase grounding is the most frequent, accounting for more than 95% of all line faults. When a grounding fault occurs in the line, there will mostly be transition resistance at the grounding point. When a high-resistance grounding fault occurs on the outlet side of a long-distance line, the proximal protection can be activated immediately, and the distal protection may not be activated due to the unclear fault component, and the differential protection on both sides cannot be operated, thus affecting the safety and reliability of the transmission line. Summary of the invention

[0003] The embodiments of the present application provide a differential direct trip method, a terminal device, and a computer-readable storage medium, which can improve the sensitivity of differential protection of a transmission line, thereby improving the safety and reliability of the transmission line.

[0004] In a first aspect, an embodiment of the present application provides a differential direct jump method, comprising:

[0005] Calculate the current parameters at both ends of the target line;

[0006] Performing a detection of a preset condition on the target line according to the current parameter to obtain a detection result; wherein the preset condition includes multiple sub-conditions;

[0007] When the detection result indicates that the target line meets the preset condition, the differential direct jump action of the target line is controlled; wherein, meeting the preset condition means meeting at least three sub-conditions.

[0008] In an embodiment of the present application, by setting multiple judgment conditions, when the transmission line meets the multiple judgment conditions, the differential direct tripping action is controlled. This can effectively reduce the situation of differential direct tripping false operation, help improve the sensitivity of differential protection, and thus improve the safety and reliability of the transmission line.

[0009] In a possible implementation manner of the first aspect, calculating current parameters at both ends of the target line includes:

[0010] Calculating the current amplitude at both ends of the target line;

[0011] The differential current and the braking current of the target line are calculated according to the current amplitudes at both ends of the target line; wherein the current parameters include the differential current and the braking current.

[0012] In some implementations, the fundamental amplitude of the current at both ends of the target line may be calculated.

[0013] Optionally, a full-wave Fourier algorithm (also called full-wave Fourier algorithm, full-wave Fourier algorithm, etc.) can be used. This algorithm is essentially a filtering algorithm that can effectively filter out the constant DC component and each positive harmonic component to obtain the fundamental wave in the current.

[0014] In one implementation, the differential current can be calculated by the formula I d =I m +I n calculate.

[0015] In one implementation, the braking current can be expressed as r =I m -I n calculate.

[0016] Among them, I d Represents the differential current, I m Indicates the fundamental amplitude of the current on this side, I n Indicates the fundamental amplitude of the current on the opposite side.

[0017] In the embodiment of the present application, by calculating the differential current and the braking current, the real-time transmission condition of the transmission line can be reflected, providing a reliable data basis for the subsequent differential direct tripping.

[0018] In a possible implementation manner of the first aspect, the preset condition includes a first subcondition; and the method includes:

[0019] If the differential current reaches a first threshold value, and the differential current is greater than a first preset multiple of the braking current, it is determined that the target line meets the first sub-condition.

[0020] Optionally, the first preset multiple is 0.6.

[0021] For example, the first sub-condition is:

[0022]

[0023] Among them, I cddz Indicates the constant value of the differential action current, which can be a preset value.

[0024] Through the first sub-condition, not only the limitation of the differential current itself is determined, but also the magnitude relationship between the differential current and the braking current is determined, which is equivalent to referring to the braking current in the transmission line. This method can effectively improve the accuracy of differential current judgment.

[0025] In a possible implementation manner of the first aspect, the preset condition includes a second subcondition; and the method includes:

[0026] If an action signal of the opposite-side protection device in the target line is detected, it is determined that the target line meets the second sub-condition.

[0027] The action signal of the opposite side protection device can be transmitted through the optical fiber channel. Since the optical fiber channel has a high transmission speed, it can effectively reduce the time delay and help improve the judgment accuracy.

[0028] In the embodiment of the present application, the detection accuracy of line faults can be effectively improved by detecting the action signal of the opposite side protection device to assist in judgment.

[0029] In a possible implementation manner of the first aspect, the preset condition includes a third subcondition; and the method includes:

[0030] If it is detected that the switch state of the target line is in the closed state, or the current fundamental amplitude of the target line is less than the second preset multiple of the rated current, it is determined that the target line meets the third sub-condition.

[0031] Optionally, the second preset multiple is 0.05. m <0.05I N , where I N is the rated current of the target circuit.

[0032] Optionally, a signal detection device may be provided at the switch position of the target line to collect the switch signal. For example, if the switch signal is detected to be a first value (such as 1), it indicates that the switch state is in the closed state; if the switch signal is detected to be a second value (such as 0), it indicates that the switch state is in the open state.

[0033] In the embodiment of the present application, judging the switch state of the target line or the ratio of the current on this side to the rated current is equivalent to judging whether there is current in the target line. Judging whether the line is in operation by judging whether there is current in the target line is more direct and reliable.

[0034] In one implementation, if it is determined according to the current parameter that the target line satisfies the preset condition, which means that at least three sub-conditions are satisfied, then it is determined that the target line satisfies the preset condition.

[0035] In a possible implementation manner of the first aspect, the detecting a preset condition on the target line according to the current parameter to obtain a detection result includes:

[0036] If it is determined according to the current parameter that the target line satisfies each sub-condition of the preset condition, then it is determined that the target line satisfies the preset condition.

[0037] In the embodiment of the present application, a variety of judgment conditions are comprehensively considered, and when all judgment conditions are met, the differential direct trip is started. This method can reduce the judgment errors caused by the detection error of a certain fault component, effectively improve the detection accuracy of the transmission line fault, and thus help to improve the sensitivity of the line differential protection.

[0038] In a second aspect, an embodiment of the present application provides a differential direct jump device, comprising:

[0039] A calculation unit, used for calculating current parameters at both ends of the target line;

[0040] A detection unit, configured to detect the target line under a preset condition according to the current parameter to obtain a detection result; wherein the preset condition includes multiple sub-conditions;

[0041] A control unit is used to control the differential direct jump action of the target line when the detection result indicates that the target line meets the preset conditions; wherein, meeting the preset conditions means meeting at least three sub-conditions.

[0042] In a third aspect, an embodiment of the present application provides a terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the differential direct jump method as described in any one of the first aspects above is implemented.

[0043] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the differential direct jump method as described in any one of the first aspects above is implemented.

[0044] In a fifth aspect, an embodiment of the present application provides a computer program product. When the computer program product runs on a terminal device, the terminal device executes the differential direct jump method described in any one of the above-mentioned first aspects.

[0045] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 is a schematic diagram of a power transmission line provided in an embodiment of the present application;

[0048] Figure 2 It is a flow chart of the differential direct jump method provided in the embodiment of the present application;

[0049] Figure 3 It is a schematic diagram of a differential direct jump process provided in an embodiment of the present application;

[0050] Figure 4 It is a structural block diagram of a differential direct jump device provided in an embodiment of the present application;

[0051] Figure 5 It is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0053] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0054] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0055] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0056] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0057] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0058] Transmission lines are a basic component of the power grid. They are widely distributed and numerous. They are often affected by various geographical and climatic environments, and are therefore prone to failure. Line faults generally take the form of single-phase grounding, two-phase grounding short circuit, two-phase short circuit and three-phase short circuit. Among them, single-phase grounding is the most frequent, accounting for more than 95% of all line faults. When a line has a grounding fault, there will mostly be transition resistance at the grounding point. When a high-resistance grounding fault occurs on the outlet side of a long-distance line, the proximal protection can be activated immediately, while the distal protection may not be activated due to the unclear fault component, and the differential protection on both sides cannot operate, thus affecting the safety and reliability of the transmission line.

[0059] Based on this, an embodiment of the present application provides a differential direct trip method. In the embodiment of the present application, by setting multiple judgment conditions, when the transmission line meets the multiple judgment conditions, the differential direct trip action is controlled, which can effectively reduce the situation of differential direct trip malfunction, help to improve the sensitivity of differential protection, and thus improve the safety and reliability of the transmission line.

[0060] See also Figure 1 , is a schematic diagram of a power transmission line provided in an embodiment of the present application. As an example and not a limitation, Figure 1 As shown, the transmission line includes a first end side A and a second end side B.

[0061] When end A is the beginning of the transmission line, end B is the end of the transmission line. When end B is the beginning of the transmission line, end A is the end of the transmission line.

[0062] In some application scenarios, differential protection devices are deployed at both ends of the transmission line.

[0063] It can be understood that the differential direct trip method of the embodiment of the present application can be applied to the differential protection device on any end side of the transmission line.

[0064] For example, when the differential direct trip method is applied to the A end, the differential direct trip method is used to control the differential protection device of the A end. In this case, the B end can be referred to as the opposite side or the opposite end. When the differential direct trip method is applied to the B end, the differential direct trip method is used to control the differential protection device of the B end. In this case, the A end can be referred to as the opposite side or the opposite end.

[0065] The following introduces the differential direct jump method provided in the embodiment of the present application.

[0066] See also Figure 2 , is a flow chart of a differential direct jump method provided in an embodiment of the present application. As an example but not a limitation, the method may include the following steps:

[0067] S101, calculating current parameters at both ends of the target line.

[0068] In one embodiment, S101 may include:

[0069] Calculating the current amplitude at both ends of the target line;

[0070] The differential current and the braking current of the target line are calculated according to the current fundamental wave amplitudes at both ends of the target line; wherein the current parameters include the differential current and the braking current.

[0071] It is understandable that transmission lines usually use alternating current, whose waveform is a sine wave, which has the characteristics of stable power supply.

[0072] Since the transmission line current is a periodic AC signal, it contains DC components and harmonics in addition to the fundamental wave. If the current amplitude of the transmission line is calculated directly, it may be affected by DC shunt and harmonics, resulting in low accuracy of the calculated current amplitude, thus affecting the control accuracy of the differential protection.

[0073] In some implementations, the fundamental amplitude of the current at both ends of the target line may be calculated.

[0074] Optionally, a full-wave Fourier algorithm (also called full-wave Fourier algorithm, full-wave Fourier algorithm, etc.) can be used. This algorithm is essentially a filtering algorithm that can effectively filter out the constant DC component and each positive harmonic component to obtain the fundamental wave in the current.

[0075] For example, the current of the transmission line may be sampled at 24 points per cycle to obtain sampling data; then, a full-cycle Fourier algorithm is performed on the sampling data to obtain the current fundamental amplitude of the transmission line.

[0076] It should be noted that, in practical applications, other filtering algorithms may also be used to calculate the current fundamental amplitude of the transmission line, and the embodiments of the present application do not specifically limit this.

[0077] In one implementation, the differential current can be calculated by the formula I d =I m +I n calculate.

[0078] In one implementation, the braking current can be expressed as r =I m -I n calculate.

[0079] Among them, I d Represents the differential current, I m Indicates the fundamental amplitude of the current on this side, I n Indicates the fundamental amplitude of the current on the opposite side.

[0080] In the embodiment of the present application, by calculating the differential current and the braking current, the real-time transmission condition of the transmission line can be reflected, providing a reliable data basis for the subsequent differential direct tripping.

[0081] S102, performing a detection of preset conditions on the target line according to the current parameter to obtain a detection result.

[0082] The preset condition may include multiple sub-conditions.

[0083] In one embodiment, the preset condition includes a first sub-condition; the method includes:

[0084] If the differential current reaches a first threshold value, and the differential current is greater than a first preset multiple of the braking current, it is determined that the target line meets the first sub-condition.

[0085] Optionally, the first preset multiple is 0.6.

[0086] For example, the first sub-condition is:

[0087]

[0088] Among them, I cddz Indicates the constant value of the differential action current, which can be a preset value.

[0089] Through the first sub-condition, not only the limitation of the differential current itself is determined, but also the magnitude relationship between the differential current and the braking current is determined, which is equivalent to referring to the braking current in the transmission line. This method can effectively improve the accuracy of differential current judgment.

[0090] In one embodiment, the preset condition includes a second sub-condition; the method includes:

[0091] If an action signal of the opposite-side protection device in the target line is detected, it is determined that the target line meets the second sub-condition.

[0092] It is understandable that Figure 1 Taking the transmission line shown in the figure as an example, when the differential direct trip method is applied to end A, end B can be called the opposite side or the opposite end, that is, the action signal of the protection device at end B is detected. When the differential direct trip method is applied to end B, end A can be called the opposite side or the opposite end, that is, the action signal of the protection device at end A is detected.

[0093] The action signal of the opposite side protection device can be transmitted through the optical fiber channel. Since the optical fiber channel has a high transmission speed, it can effectively reduce the time delay and help improve the judgment accuracy.

[0094] In the embodiment of the present application, the detection accuracy of line faults can be effectively improved by detecting the action signal of the opposite side protection device to assist in judgment.

[0095] In one embodiment, the preset condition includes a third sub-condition; the method includes:

[0096] If it is detected that the switch state of the target line is in the closed state, or the current fundamental amplitude of the target line is less than the second preset multiple of the rated current, it is determined that the target line meets the third sub-condition.

[0097] Optionally, the second preset multiple is 0.05, such as I m <0.05I N , where I N is the rated current of the target circuit.

[0098] It can be understood that when the current fundamental wave amplitude is less than the second preset multiple of the rated current, it can be regarded as that there is no current in the circuit.

[0099] Optionally, a signal detection device may be provided at the switch position of the target line to collect the switch signal. For example, if the switch signal is detected to be a first value (such as 1), it indicates that the switch state is in the closed state; if the switch signal is detected to be a second value (such as 0), it indicates that the switch state is in the open state.

[0100] In the embodiment of the present application, judging the switch state of the target line or the ratio of the current on this side to the rated current is equivalent to judging whether there is current in the target line. Judging whether the line is in operation by judging whether there is current in the target line is more direct and reliable.

[0101] S103, when the detection result indicates that the target line meets a preset condition, controlling a differential direct tripping action of the target line.

[0102] Among them, the differential direct tripping action can trigger the circuit breaker to trip, thereby cutting off the faulty line.

[0103] In one implementation, if it is determined according to the current parameter that the target line satisfies the preset condition, which means that at least three sub-conditions are satisfied, then it is determined that the target line satisfies the preset condition.

[0104] In one implementation, if it is determined according to the current parameter that the target line satisfies each sub-condition of the preset condition, it is determined that the target line satisfies the preset condition.

[0105] For example, see Figure 3 , is a schematic diagram of a differential direct jump process provided in an embodiment of the present application. As an example and not a limitation, Figure 3 As shown, the differential direct jump process may include the following steps:

[0106] S201, calculating the current amplitude at both ends of the target line.

[0107] S202, calculating the differential current and the braking current according to the current amplitudes at both ends of the target line.

[0108] Steps S201-S202 are the same as step S101. For details, please refer to the description in the embodiment of S101, which will not be repeated here.

[0109] S203, determining whether the first sub-condition is satisfied.

[0110] If the first sub-condition is not met, the differential control is controlled to jump directly without action; if the first sub-condition is met, S204 is executed.

[0111] The implementation method of step S203 can refer to the description in the embodiment related to the first sub-condition in S102, which will not be repeated here.

[0112] S204: If the first sub-condition is met, determine whether the second sub-condition is met.

[0113] If the second sub-condition is not met, the differential control is controlled to jump directly without action; if the second sub-condition is met, S205 is executed.

[0114] The implementation method of step S204 can refer to the description in the embodiment related to the second sub-condition in S102, which will not be repeated here.

[0115] S205: If the second sub-condition is met, determine whether the third sub-condition is met.

[0116] If the third sub-condition is not met, the differential control is controlled to jump directly without action; if the third sub-condition is met, S206 is executed.

[0117] The implementation method of step S205 can refer to the description in the embodiment related to the third sub-condition in S102, which will not be repeated here.

[0118] S206, if the third sub-condition is satisfied, that is, it is determined that the preset condition is satisfied, then the differential direct jump action is controlled.

[0119] It can be understood that in the embodiment of the present application, when each sub-condition is satisfied, the differential direct jump is controlled to act. If any sub-condition is not satisfied, the differential direct jump is controlled not to act.

[0120] In the embodiment of the present application, a variety of judgment conditions are comprehensively considered, and when all judgment conditions are met, the differential direct trip is started. This method can reduce the judgment errors caused by the detection error of a certain fault component, effectively improve the detection accuracy of the transmission line fault, and thus help to improve the sensitivity of the line differential protection.

[0121] It should be noted that Figure 3 This is an example of a differential direct jump process. In actual applications, the judgment order of the first sub-condition, the second sub-condition and the third sub-condition can be changed. The embodiment of the present application does not specifically limit the judgment order of each sub-condition in the preset conditions.

[0122] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0123] Corresponding to the differential direct jump method described in the above embodiment, Figure 4 This is a structural block diagram of the differential direct jump device provided in an embodiment of the present application. For the sake of convenience of explanation, only the parts related to the embodiment of the present application are shown.

[0124] Reference Figure 4 , the device 4 comprises:

[0125] The calculation unit 41 is used to calculate the current parameters at both ends of the target line.

[0126] The detection unit 42 is used to detect the target line under a preset condition according to the current parameter to obtain a detection result; wherein the preset condition includes multiple sub-conditions.

[0127] The control unit 43 is used to control the differential direct jump action of the target line when the detection result indicates that the target line meets the preset conditions; wherein, meeting the preset conditions means meeting at least three sub-conditions.

[0128] Optionally, the computing unit 41 is further configured to:

[0129] Calculating the current amplitude at both ends of the target line;

[0130] The differential current and the braking current of the target line are calculated according to the current amplitudes at both ends of the target line; wherein the current parameters include the differential current and the braking current.

[0131] Optionally, the preset condition includes the first sub-condition. Accordingly, the detection unit 42 is further configured to:

[0132] If the differential current reaches a first threshold value, and the differential current is greater than a first preset multiple of the braking current, it is determined that the target line meets the first sub-condition.

[0133] Optionally, the first preset multiple is 0.6.

[0134] Optionally, the preset condition includes a second sub-condition. Accordingly, the detection unit 42 is further configured to:

[0135] If an action signal of the opposite-side protection device in the target line is detected, it is determined that the target line meets the second sub-condition.

[0136] Optionally, the preset condition includes a third sub-condition. Accordingly, the detection unit 42 is further configured to:

[0137] If it is detected that the switch state of the target line is in the closed state, or the current fundamental amplitude of the target line is less than the second preset multiple of the rated current, it is determined that the target line meets the third sub-condition.

[0138] Optionally, the second preset multiple is 0.05.

[0139] Optionally, the detection unit 42 is further used for:

[0140] If it is determined according to the current parameter that the target line satisfies each sub-condition of the preset condition, then it is determined that the target line satisfies the preset condition.

[0141] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0142] in addition, Figure 4 The differential direct jump device shown can be a software unit, a hardware unit, or a combination of software and hardware units built into an existing terminal device, or it can be integrated into the terminal device as an independent pendant, or it can exist as an independent terminal device.

[0143] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0144] Figure 5 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application. Figure 5 As shown, the terminal device 5 of this embodiment includes: at least one processor 50 ( Figure 5 Only one is shown in the figure) a processor, a memory 51, and a computer program 52 stored in the memory 51 and executable on the at least one processor 50, and when the processor 50 executes the computer program 52, the steps in any of the above-mentioned differential protection method embodiments are implemented.

[0145] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will understand that Figure 5It is only an example of the terminal device 5 and does not constitute a limitation on the terminal device 5. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, it may also include input and output devices, network access devices, etc.

[0146] The processor 50 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0147] In some embodiments, the memory 51 may be an internal storage unit of the terminal device 5, such as a hard disk or memory of the terminal device 5. In other embodiments, the memory 51 may also be an external storage device of the terminal device 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal device 5. The memory 51 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0148] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0149] An embodiment of the present application provides a computer program product. When the computer program product is run on a terminal device, the terminal device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0150] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the device / terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0151] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0152] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0153] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0154] 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0155] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A differential direct trip method, characterized in that: include: Calculate the current parameters at both ends of the target line; Performing a detection of a preset condition on the target line according to the current parameter to obtain a detection result; wherein the preset condition includes multiple sub-conditions; When the detection result indicates that the target line meets the preset condition, the differential direct jump action of the target line is controlled; wherein, meeting the preset condition means meeting at least three sub-conditions.

2. The differential direct jump method according to claim 1, characterized in that: The calculating of current parameters at both ends of the target line includes: Calculating the current amplitude at both ends of the target line; The differential current and the braking current of the target line are calculated according to the current amplitudes at both ends of the target line; wherein the current parameters include the differential current and the braking current.

3. The differential direct trip method according to claim 2, characterized in that: The preset condition includes a first sub-condition; the method includes: If the differential current reaches a first threshold value, and the differential current is greater than a first preset multiple of the braking current, it is determined that the target line meets the first sub-condition.

4. The differential direct trip method according to claim 2, characterized in that: The preset condition includes a second sub-condition; the method includes: If an action signal of the opposite-side protection device in the target line is detected, it is determined that the target line meets the second sub-condition.

5. The differential direct trip method according to claim 2, characterized in that: The preset condition includes a third sub-condition; the method includes: If it is detected that the switch state of the target line is in the closed state, or the current fundamental amplitude of the target line is less than the second preset multiple of the rated current, it is determined that the target line meets the third sub-condition.

6. The differential direct trip method according to claim 3, characterized in that: The first preset multiple is 0.

6.

7. The differential direct trip method according to claim 5, characterized in that: The second preset multiple is 0.

05.

8. The differential direct trip method according to claim 1, characterized in that: The detecting of the target line under a preset condition according to the current parameter to obtain a detection result includes: If it is determined according to the current parameter that the target line satisfies each sub-condition of the preset condition, then it is determined that the target line satisfies the preset condition.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 8 is implemented.

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

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