Fault positioning method during multi-device jump, power transmission system, device and medium

Abstract

The invention provides a fault positioning method during multi-device jump, a power transmission system, a device and a medium, which are applied to the power transmission system, the power transmission system comprises a control terminal and a plurality of power transmission lines, and each power transmission line is provided with a plurality of circuit breakers connected in series; the positioning method comprises the steps that when a power transmission line breaks down, all circuit breakers affected by the fault trip and upload tripping signals to a control terminal, and the control terminal obtains state changes and tripping time of the circuit breakers according to the tripping signals; the control terminal obtains the power failure time of the two sides of each circuit breaker according to the state change of the circuit breakers, and obtains the circuit breaker closest to the boundary of the power supply side in the tripped circuit breakers according to the power failure time; and the control terminal recovers the topological state of the circuit breaker to the topological state before tripping, and positions the fault section according to the topological state before tripping. According to the method provided by the invention, the fault position can be quickly positioned according to the tripping signals provided by the plurality of circuit breakers on the power transmission line.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line protection, and in particular to a fault locating method, a power transmission system, a device and a medium when multiple devices trip in series. Background Art

[0002] With the development of distribution network technology, more and more newly invested switchgear adopts circuit breakers. In order to ensure the safe and stable operation of the power grid, the protection devices of circuit breakers at all levels are set and calculated to meet the requirements of selectivity, speed, sensitivity and reliability. However, the current situation is that the protection setting management of these circuit breakers is not perfect in many places, resulting in several circuit breakers on the power supply path tripping at the same time and sending "overcurrent" action signals when a fault occurs. However, due to the early setting time of some transmission lines, the protection setting of circuit breakers was improper during construction at that time, resulting in several circuit breakers on a power supply line tripping at the same time when a power supply line fails. The existing judgment logic is "receiving the "overcurrent" action signal -> checking the current state of the circuit breaker corresponding to the signal -> judging whether the protection section of the circuit breaker is faulty according to the current state of the circuit breaker". Since the final result of the fault is that all circuit breakers have tripped, the existing judgment logic will result in "all sections protected by tripped circuit breakers have faults". It is impossible to quickly locate the faulty section based on the tripping protection information uploaded by the circuit breaker. The entire line needs to be checked one by one, resulting in the inability to quickly repair the faulty circuit, affecting the power supply recovery time. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method, an apparatus, an electronic device, and a storage medium, which can quickly locate a fault location according to trip signals provided by multiple circuit breakers on a transmission line.

[0004] In a first aspect, an embodiment of the present invention provides a fault locating method when multiple devices are tripped in series, which is applied to a power transmission system, wherein the power transmission system includes a control terminal and multiple transmission lines, each of the transmission lines is provided with multiple circuit breakers connected in series, and the circuit breakers are communicatively connected to the control terminal; the locating method includes:

[0005] When a fault occurs in the transmission line, all the circuit breakers affected by the fault trip and upload a trip signal to the control terminal, and the control terminal obtains the state change of the circuit breaker and the trip time of the tripped circuit breaker according to the trip signal;

[0006] The control terminal obtains the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and obtains the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time;

[0007] The control terminal restores the topological state of the circuit breaker to the topological state before tripping according to the state change of the circuit breaker, and locates the fault section in the transmission line according to the topological state before tripping.

[0008] In some embodiments of the present invention, the control terminal includes a device state change database; all the circuit breakers affected by the fault trip and upload a trip signal to the control terminal, and the control terminal obtains the state change of the circuit breaker and the trip time of the tripped circuit breaker according to the trip signal, comprising:

[0009] The control terminal determines, according to the tripping signal, whether each tripped circuit breaker is tripping for the first time, and obtains the position of the transmission line and the circuit breaker that tripped for the first time according to the determination result;

[0010] The control terminal starts from the circuit breaker that trips for the first time, and records the state change and the tripping time of each tripped circuit breaker in the device state change database in turn, and corresponds to the device number of the circuit breaker recorded in the database.

[0011] In some embodiments of the present invention, the circuit breaker is further provided with a protection signal recheck timer; before the step of the control terminal acquiring the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and acquiring the circuit breaker closest to the power supply point among the tripped circuit breakers according to the power outage time, the method includes:

[0012] When a fault occurs in the transmission line, the protection devices of all the circuit breakers affected by the fault perform protection actions and transmit a first protection signal to the control terminal. Meanwhile, after the control terminal receives the trip signal, the protection signal recheck timer starts timing until the control terminal receives the first protection signal.

[0013] After the control terminal receives the first protection signal, if the timing of the protection signal recheck timer is less than the first preset time, the control terminal is allowed to generate a fault record.

[0014] In some embodiments of the present invention, the circuit breaker is further provided with a fault determination management timer; the control terminal obtains the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and obtains the circuit breaker closest to the power supply point among the tripped circuit breakers according to the power outage time, comprising:

[0015] When the control terminal receives the trip signal, the fault determination management timer starts timing, and at the same time, the control terminal obtains the power outage time on both sides of the circuit breaker according to the state change of the circuit breaker;

[0016] When the time counted by the fault determination management timer exceeds a second preset time, if the control terminal is allowed to generate the fault record, the control terminal generates the fault record according to the state change of the circuit breaker, the trip time and the power outage time;

[0017] According to the fault record, the circuit breaker among the tripped circuit breakers that is closest to the power supply side boundary is obtained.

[0018] In some embodiments of the present invention, the control terminal further includes a fault management database; when the control terminal receives the trip signal, the fault determination management timer starts timing, and at the same time, the control terminal obtains the power outage time on both sides of the circuit breaker according to the state change of the circuit breaker, comprising:

[0019] The control terminal marks the tripped circuit breaker as a switch to be determined in the fault management database according to the trip signal and obtains the total number of switches to be determined on the transmission line;

[0020] The fault management database applies to record the time counted by the fault determination management timer.

[0021] In some embodiments of the present invention, the control terminal restores the topological state of the circuit breaker to the topological state before tripping according to the state change of the circuit breaker, and the topological state before tripping is based on the step of locating the fault section in the transmission line, including:

[0022] The control terminal obtains the first tripping time according to the tripping time of all the tripped circuit breakers, wherein the first tripping time is the tripping time of the first tripped circuit breaker;

[0023] The control terminal sequentially compares whether the power outage time on both sides of each circuit breaker is greater than the first trip time, until a circuit breaker whose power outage time on either side is less than the first trip time is found;

[0024] After finding the circuit breaker whose power outage time on any side is less than the first tripping time, the control terminal restores the topological states of all the circuit breakers to the topological states before the tripping, and locates the fault section according to the topological states before the tripping.

[0025] In some embodiments of the present invention, the control terminal restores the topological states of all the circuit breakers to the topological states before the tripping, and locates the fault section according to the topological states before the tripping, comprising:

[0026] The position of the circuit breaker farthest from the power supply side boundary among the tripped circuit breakers is obtained, and the fault section is located according to the protection range of the circuit breaker.

[0027] In a second aspect, an embodiment of the present invention provides a power transmission system, comprising a control terminal and a plurality of transmission lines, each of the transmission lines being provided with a plurality of circuit breakers connected in series, the circuit breakers being communicatively connected with the control terminal; the power transmission system is used to execute the fault location method when multiple devices trip in series as described in the embodiment of the above aspect.

[0028] In the third aspect, an embodiment of the present invention provides a computer device, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the fault location method when multiple devices jump in series as described in the above-mentioned embodiment.

[0029] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the fault location method when multiple devices jump in series as described in the above-mentioned embodiment.

[0030] The fault location method when multiple devices trip in series according to the embodiment of the present invention has at least the following beneficial effects: the present invention obtains the state change of the circuit breaker from the trip signal uploaded by the circuit breaker, obtains the power outage time on both sides of each circuit breaker, obtains the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time, so as to locate the faulty transmission line, and finally locates the faulty section raised in the transmission line according to the topological state before the trip. The method provided by the present invention can quickly locate the fault location according to the trip signals provided by multiple circuit breakers on the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flow chart of a method for locating a fault when multiple devices hop in series, provided by an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of a power transmission line according to an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of a database of an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of a brief process of determining a fault section according to an embodiment of the present invention;

[0035] Figure 5 It is a structural diagram of a computer device provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0040] The embodiment of the present invention provides a method for obtaining the state change of the circuit breaker from the trip signal uploaded by the circuit breaker, obtaining the power outage time on both sides of each circuit breaker, obtaining the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time, so as to locate the faulty transmission line, and finally locate the fault section raised in the transmission line according to the topological state before the trip. The method provided by the present invention can quickly locate the fault location according to the trip signals provided by multiple circuit breakers on the transmission line.

[0041] The concepts involved in the present invention are explained below:

[0042] Protection setting management of circuit breakers: involves setting the protection devices of circuit breakers to ensure that in the event of a fault or abnormal situation, the circuit breaker can promptly and accurately cut off the circuit, thereby protecting the stability of the power system and the safety of the equipment. According to the design and operation requirements of the power system, set appropriate operating currents and times for the protection devices of the circuit breakers. These setting values ​​need to be determined based on factors such as the maximum load of the system, line length, and equipment characteristics. Circuit breakers of different levels need to work in coordination to achieve selective fault removal and avoid unnecessary expansion of the scope of power outages;

[0043] Topological state of circuit breakers: The topological state of circuit breakers refers to the physical layout and logical relationship of circuit breakers connected and disconnected in the power grid. Circuit breakers are switching devices used to control and protect circuits. They can cut off or connect the current in the circuit, especially in the event of a fault to protect the power grid and equipment. The topological state reflects the opening and closing state of circuit breakers and their location and relationship in the power grid structure.

[0044] The control method of the embodiment of the present invention is further described below based on the accompanying drawings.

[0045] Reference Figure 1-2 , Figure 1 A flowchart of a fault locating method when multiple devices are tripped in series is provided in an embodiment of the present invention. The locating method is applied to a power transmission system, the power transmission system includes a control terminal and multiple power transmission lines, each of which is provided with multiple circuit breakers connected in series, and the circuit breaker is communicatively connected with the control terminal; the locating method includes but is not limited to the following steps:

[0046] Step S100, when a fault occurs in the transmission line, all circuit breakers affected by the fault trip and upload a trip signal to the control terminal, and the control terminal obtains the state change of the circuit breaker and the trip time of the tripped circuit breaker according to the trip signal;

[0047] Step S200, the control terminal obtains the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and obtains the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time;

[0048] Step S300: The control terminal restores the topological state of the circuit breaker to the topological state before tripping according to the state change of the circuit breaker, and locates the fault section in the transmission line according to the topological state before tripping.

[0049] It should be noted that one of the transmission lines in the embodiment of the present invention is as follows Figure 2 As shown, the transmission line includes a plurality of circuit breakers connected in series, each circuit breaker can protect the transmission line between the right side of itself and the next circuit breaker, for example, in the embodiment of the present invention Figure 2The circuit breaker F1, F2 and F3 are included, and the transmission line includes K1, K2, K3 and K4, wherein the circuit breaker F1 can protect the K2 section, the circuit breaker F2 can protect the K3 section, and the circuit breaker F3 can protect the K4 section. Figure 2 L1 is the load switch connected to the rest of the transmission lines, FCB is the fault current blocker, and BUSB is the power supply side boundary of the transmission line. When a transmission line fails, such as a short circuit occurs in a section of the transmission line, the protection section will be instantly overcurrent, triggering the protection device of the circuit breaker to perform protection action. However, due to the imperfect setting of the protection setting value management of the existing circuit breakers, when a circuit breaker is tripped, all the circuit breakers in series between the circuit breaker and the power supply side of the transmission line will trip, for example Figure 2 If F3 trips, F1 and F2 will also trip (it is understandable that if F2 trips, only F1 will trip, and F3 is not between F2 and the power supply side and will not trip). Further, in step S100, when the circuit breaker in the transmission line trips due to a fault, all tripped circuit breakers will transmit a trip signal to the control terminal of the transmission line, and the control terminal will know the state change of the circuit breaker and the trip time of each circuit breaker according to the trip signal. It is understandable that since the trip time actually obtained by the control terminal is determined by the moment when the control terminal receives the trip signal, there is a certain difference from the actual time when the state change of the circuit breaker occurs. This is because the position of the circuit breaker is actually quite different, and there are also differences in the communication links between each circuit breaker and the control terminal. Therefore, the time consumed by the circuit breaker to transmit the trip signal to the control terminal in each communication link is also different. It is further understandable that if the position of the earliest tripped circuit breaker is determined by the state change time recorded in the control terminal alone to determine the fault section, there is a great possibility of misjudgment. Therefore, in step S200, in addition to obtaining the tripping time of each circuit breaker according to the state change of the circuit breaker, the embodiment of the present invention also needs to infer the power-off time of the sections on both sides of each circuit breaker according to the information contained in the tripping signal, and obtain the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time, so as to subsequently locate the specific transmission line and then locate the specific fault section. Furthermore, in step S300, after determining the tripping time of the circuit breaker and the power outage time on both sides of the circuit breaker, since the circuit breakers have all tripped at this time, it is impossible to determine which section caused the tripping according to the current topological state of the circuit breaker on the transmission line. Therefore, when locating the faulty section, the control terminal needs to restore the topological state of the transmission line to the state before the tripping according to the previously recorded state change of the circuit breaker, and finally locate the faulty section according to the topological state before the tripping.

[0050] It should be noted that in order to solve the problem of multiple devices tripping at the same time during a fault, causing multiple fault sections according to the original judgment logic, and the fault section judgment error caused by the judgment, the embodiment of the present invention proposes a fault section positioning method for finding the fault action device on the load side based on the pre-fault topological state and starting from the tripping device closest to the power supply side. In a transmission line with multiple circuit breakers connected in series, and when the circuit breakers trip at the same time due to improper integration of protection settings, this method can obtain the topological state of each circuit breaker before tripping through the tripping signal and judge the fault section according to the topological state.

[0051] In addition, in one embodiment, Figure 1 Step S100 of the illustrated embodiment also includes but is not limited to the following steps:

[0052] Step S110, the control terminal determines whether each tripped circuit breaker is tripped for the first time according to the tripping signal, and obtains the location of the transmission line and circuit breaker that tripped for the first time according to the determination result;

[0053] Step S120, the control terminal records the state change and tripping time of each tripped circuit breaker in the device state change database starting from the circuit breaker that tripped for the first time, and corresponds to the device number of the circuit breaker recorded in the database.

[0054] It should be noted that in step S110 to step S120, the embodiment of the present invention additionally provides a device state change database, which is used to confirm the recovery target time point of the pre-fault state that needs to be restored. After the device trips, the control terminal records and stores the state change of the device in the device state change database, and finds the device number of the corresponding circuit breaker in the device state change database, thereby obtaining the location of the circuit breaker. Furthermore, before determining the fault section, the embodiment of the present invention needs to first determine whether each circuit breaker is a circuit breaker that trips for the first time, so as to exclude the circuit breaker that trips again after the switch overlaps during the self-healing process, and prevent repeated determination of the fault section. Furthermore, the device state change database allows only one process to write, allows multiple processes to read at the same time, and can save field telesignaling variables for 2 weeks. In order to ensure the high performance of the device state change database, the embodiment of the present invention adopts the method of overwriting the oldest record with the latest record, and the cache of the latest record can be realized without memory copying.

[0055] In addition, in one embodiment, Figure 1 Before step S200 in the illustrated embodiment, the following steps are also included but not limited to:

[0056] Step S201, when a fault occurs in a transmission line, the protection devices of all circuit breakers affected by the fault perform protection actions and transmit a first protection signal to a control terminal. At the same time, after the control terminal receives a trip signal, a protection signal recheck timer starts timing until the control terminal receives the first protection signal;

[0057] Step S202: After the control terminal receives the first protection signal, if the timing of the protection signal recheck timer is less than the first preset time, the control terminal is allowed to generate a fault record.

[0058] It should be noted that in step S201 to step S202, the circuit breaker is also provided with a protection signal recheck timer, which is used to ensure that the fault signal detected by the protection device is true and reliable, and to avoid malfunction due to instantaneous interference or other reasons. Furthermore, the first preset time can be adjusted arbitrarily according to demand. In one embodiment of the present invention, the first preset time is 5s. The determining factor of this time is that the same circuit breaker sends the trip signal and the first protection signal to the main station at the same time, and there is also a delay difference. If the time interval is set too short, it may also lead to misjudgment.

[0059] In addition, in one embodiment, Figure 1 Step S200 in the illustrated embodiment also includes but is not limited to the following steps:

[0060] Step S210: When the control terminal receives the trip signal, the fault determination management timer starts timing, and the control terminal obtains the power outage time on both sides of the circuit breaker according to the state change of the circuit breaker;

[0061] Step S220, when the time counted by the fault determination management timer exceeds the second preset time, if the control terminal is allowed to generate a fault record, the control terminal generates a fault record according to the state change, trip time and power outage time of the circuit breaker;

[0062] Step S230: acquiring the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the fault record.

[0063] It should be noted that in steps S210 to S230, the circuit breaker is also provided with a fault determination management timer. When the control terminal receives a trip signal, the fault determination management timer starts timing. When the time counted by the fault determination management timer exceeds the second preset time, it can be considered that the trip signals of all tripped circuit breakers on the transmission line affected by the circuit breaker fault have been completely received by the control terminal within the second preset time, so as to avoid being affected by the tripping of circuit breakers of other transmission lines, resulting in the positioning of the fault section of the current transmission line to be determined being affected. Furthermore, the control terminal can also generate a fault record according to the state change, trip time and power outage time of the circuit breaker. The step of generating a fault record in the embodiment of the present invention indicates that the circuit breaker and transmission line related to the fault have been determined, and the fault area can be located later according to the circuit breaker and transmission line determined by the fault record. It can be understood that the reason for determining the power supply side boundary of the transmission line in the embodiment of the present invention is that the transmission lines of the actual transmission system are relatively complex, and a circuit breaker may be located on multiple branch transmission lines. Therefore, it is necessary to determine the specific branch where the fault occurs based on the power supply side boundary of the transmission line.

[0064] In addition, in one embodiment, Figure 1 In step S210 of the illustrated embodiment, the following steps are also included but not limited to:

[0065] Step S211, the control terminal marks the tripped circuit breaker as a switch to be determined in the fault management database according to the tripping signal and obtains the total number of switches to be determined on the transmission line;

[0066] Step S212: The fault management database applies to record the time counted by the fault determination management timer.

[0067] It should be noted that, in step S211, the embodiment of the present invention is also provided with a fault management database. Whenever the control terminal receives a trip signal transmitted by a circuit breaker, the tripped circuit breaker is marked as a switch to be determined in the fault management database, and the total number of switches to be determined recorded in the fault management database is increased by 1, until the timing time of the fault determination management timer in the above-mentioned embodiment exceeds the second preset time, at which time the control terminal can obtain the total number of tripped circuit breakers. Furthermore, in step S212, the fault management database applies to record the time counted by the fault determination management timer, which can be used for exception handling. If an abnormal situation occurs, the corresponding mark can be cleared by comparing this time.

[0068] In addition, in one embodiment, referring to Figure 4 ,exist Figure 1 Step S300 in the illustrated embodiment also includes but is not limited to the following steps:

[0069] Step S310, the control terminal obtains the first tripping time according to the tripping time of all tripped circuit breakers, wherein the first tripping time is the tripping time of the first tripped circuit breaker;

[0070] Step S320, the control terminal sequentially compares whether the power outage time on both sides of each circuit breaker is greater than the first trip time, until a circuit breaker whose power outage time on either side is less than the first trip time is found;

[0071] Step S330, after finding the circuit breaker on either side whose power outage time is less than the first tripping time, the control terminal restores the topological state of all circuit breakers to the topological state before tripping, and locates the fault section according to the topological state before tripping.

[0072] It should be noted that in steps S310 to S320, the control terminal determines the tripping time of the first circuit breaker to trip based on the time of the received tripping signal, and obtains the first tripping time based on the distance between the tripping time of the first circuit breaker and the current judgment time. It is understandable that, although there is a difference in the communication link between the circuit breaker and the control terminal, the tripping time of the first circuit breaker to trip obtained by the control terminal is not necessarily the tripping time of the first circuit breaker to trip. However, it can be seen from step S320 that the embodiment of the present invention only uses the first tripping time as a benchmark for comparison with the power outage time on both sides of the circuit breaker. When a circuit breaker on either side is found to have a power outage time less than the first tripping time, the specific transmission line can be determined. Subsequently, the power supply side boundary of the corresponding transmission line can be found based on the circuit breaker on either side having a power outage time less than the first tripping time. Refer to Figure 4 , when the first jump time is determined, Figure 4 After the step of checking whether it is a tripped device on the power supply side is passed, the step of restoring the topological state before the fault is started. Furthermore, the embodiment of the present invention also provides a database for saving the latest power outage time of the section, which is used to save the power outage time of each section on the transmission line (between two circuit breakers or between other power supply equipment and circuit breakers), and saves the power outage time of the section according to the hash value of the section ID as the subscript.

[0073] In addition, in one embodiment, Figure 1 Step S330 of the illustrated embodiment also includes but is not limited to the following steps:

[0074] Step S331, obtaining the position of the circuit breaker farthest from the power supply side boundary among the tripped circuit breakers, and locating the fault section according to the protection range of the circuit breaker.

[0075] It should be noted that in step S331, after the specific branch is determined, the position of the circuit breaker farthest from the power supply side boundary in the branch is found according to the principle of fault section determination, and the position protected by this circuit breaker is the fault section.

[0076] In a second aspect, an embodiment of the present invention provides a power transmission system, which includes a control terminal and multiple transmission lines, each transmission line is provided with multiple circuit breakers connected in series, and the circuit breakers are communicatively connected with the control terminal; the power transmission system is used to execute the fault location method when multiple devices jump in series in the above-mentioned embodiment.

[0077] In a third aspect, an embodiment of the present invention provides a computer device, characterized in that it includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the fault location method when multiple devices jump in series as in the above-mentioned embodiment.

[0078] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute a fault location method when multiple devices jump in series as in the above-mentioned embodiment.

[0079] like Figure 5 As shown, Figure 5 is a structural diagram of a computer device provided by an embodiment of the present invention. The present invention also provides a computer device, including:

[0080] The processor 801 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0081] The memory 802 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 802 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 802, and the processor 801 calls and executes the fault location method when multiple devices are serially jumped in the embodiment of this application;

[0082] Input / output interface 803, used to implement information input and output;

[0083] The communication interface 804 is used to realize the communication interaction between the present apparatus and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, WI FI, Bluetooth, etc.);

[0084] A bus 805 that transmits information between the various components of the device (e.g., the processor 801, the memory 802, the input / output interface 803, and the communication interface 804);

[0085] The processor 801 , the memory 802 , the input / output interface 803 and the communication interface 804 are connected to each other in communication within the device via a bus 805 .

[0086] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0087] The following is a specific embodiment of the present invention:

[0088] Reference Figure 2 to Figure 4 In the embodiment of the present invention, assuming that a short circuit fault occurs at K4 in the figure, the F1, F2, and F3 circuit breakers will trip simultaneously due to improper protection setting coordination. The control terminal will receive the trip signals in sequence, receiving the trip signal of F3 at 0 seconds, the trip signal of F2 at 1 second, and the trip signal of F1 at 2 seconds. The processing process of the control terminal is as follows: the overcurrent protection action and trip signal of F3 are received at 0 seconds, the overcurrent protection action and trip signal of F2 are received at 1 second, and the overcurrent protection action and trip signal of F1 are received at 2 seconds. The control terminal applies for a protection signal recheck timer and a fault judgment management timer to determine whether the fault actually occurs, and records the number of trips of the circuit breaker, wherein the verification time of the protection signal recheck timer is set to 5s, and the verification time of the fault judgment management timer is set to 30s. Refer to Figure 3Furthermore, the control terminal stores the state changes of each circuit breaker in the equipment state change database according to the tripping signals of F1, F2, and F3, stores the power outage time in the latest power outage time storage database of the section, and marks the tripped circuit breaker as a switch to be determined in the fault management database. Then, at the 30th second, that is, after the fault determination management timer times out, it starts to locate the position of the fault section according to the switch to be determined. At 30S, the fault section determination timer of F3 times out. Since the power outage time of the sections on both sides of F3 is greater than the first trip time of the line, there is no need to start the fault section determination; at 31S, the fault section determination timer of F2 times out. Since the power outage time of the sections on both sides of F2 is greater than the first trip time of the line, there is no need to start the fault section determination; at 32S, the fault section determination timer of F1 times out. Since the power outage time of one of the sections on both sides of F1 is less than the first trip time, it is necessary to start the fault section determination. At this time, the control terminal restores the topological state of the circuit breaker to the time point of the first trip time, that is, during the positioning process, F3, F2, and F1 are all restored to the closed state. According to the principle of fault section determination, the circuit breaker farthest from the power supply side of the transmission line protects the fault section, and the fault section is determined to be between F3 and L1.

[0089] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0090] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A method for locating a fault when multiple devices are in series, characterized in that: Applied to a power transmission system, the power transmission system comprises a control terminal and a plurality of power transmission lines, each of the power transmission lines is provided with a plurality of circuit breakers connected in series, the circuit breakers are communicatively connected with the control terminal; the positioning method comprises: When a fault occurs in the transmission line, all the circuit breakers affected by the fault trip and upload a trip signal to the control terminal, and the control terminal obtains the state change of the circuit breaker and the trip time of the tripped circuit breaker according to the trip signal; The control terminal obtains the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and obtains the circuit breaker closest to the power supply side boundary among the tripped circuit breakers according to the power outage time; The control terminal restores the topological state of the circuit breaker to the topological state before tripping according to the state change of the circuit breaker, and locates the fault section in the transmission line according to the topological state before tripping.

2. The fault location method when multiple devices jump in series according to claim 1 is characterized in that: The control terminal includes a device state change database; all the circuit breakers affected by the fault trip and upload a trip signal to the control terminal, and the control terminal obtains the state change of the circuit breaker and the trip time of the tripped circuit breaker according to the trip signal, including: The control terminal determines, according to the tripping signal, whether each tripped circuit breaker is tripping for the first time, and obtains the position of the transmission line and the circuit breaker that tripped for the first time according to the determination result; The control terminal starts from the circuit breaker that trips for the first time, and records the state change and the tripping time of each tripped circuit breaker in the device state change database in turn, and corresponds to the device number of the circuit breaker recorded in the database.

3. The fault location method when multiple devices jump in series according to claim 1 is characterized in that: The circuit breaker is also provided with a protection signal recheck timer; before the step of the control terminal acquiring the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and acquiring the circuit breaker closest to the power supply point among the tripped circuit breakers according to the power outage time, the method comprises: When a fault occurs in the transmission line, the protection devices of all the circuit breakers affected by the fault perform protection actions and transmit a first protection signal to the control terminal. Meanwhile, after the control terminal receives the trip signal, the protection signal recheck timer starts timing until the control terminal receives the first protection signal. After the control terminal receives the first protection signal, if the timing of the protection signal recheck timer is less than the first preset time, the control terminal is allowed to generate a fault record.

4. The fault location method when multiple devices jump in series according to claim 3 is characterized in that: The circuit breaker is also provided with a fault determination management timer; the control terminal obtains the power outage time on both sides of each circuit breaker according to the state change of the circuit breaker, and obtains the circuit breaker closest to the power supply point among the tripped circuit breakers according to the power outage time, comprising: When the control terminal receives the trip signal, the fault determination management timer starts timing, and at the same time, the control terminal obtains the power outage time on both sides of the circuit breaker according to the state change of the circuit breaker; When the time counted by the fault determination management timer exceeds a second preset time, if the control terminal is allowed to generate the fault record, the control terminal generates the fault record according to the state change of the circuit breaker, the trip time and the power outage time; According to the fault record, the circuit breaker among the tripped circuit breakers that is closest to the power supply side boundary is obtained.

5. The fault location method when multiple devices jump in series according to claim 4 is characterized in that: The control terminal also includes a fault management database; when the control terminal receives the trip signal, the fault determination management timer starts timing, and at the same time, the control terminal obtains the power outage time on both sides of the circuit breaker according to the state change of the circuit breaker, including: The control terminal marks the tripped circuit breaker as a switch to be determined in the fault management database according to the trip signal and obtains the total number of switches to be determined on the transmission line; The fault management database applies to record the time counted by the fault determination management timer.

6. The fault location method when multiple devices jump in series according to claim 1, characterized in that: The control terminal restores the topological state of the circuit breaker to the topological state before tripping according to the state change of the circuit breaker, and the topological state before tripping is restored according to the step of locating the fault section in the transmission line, including: The control terminal obtains the first tripping time according to the tripping time of all the tripped circuit breakers, wherein the first tripping time is the tripping time of the first tripped circuit breaker; The control terminal sequentially compares whether the power outage time on both sides of each circuit breaker is greater than the first trip time, until a circuit breaker whose power outage time on either side is less than the first trip time is found; After finding the circuit breaker whose power outage time on any side is less than the first tripping time, the control terminal restores the topological states of all the circuit breakers to the topological states before the tripping, and locates the fault section according to the topological states before the tripping.

7. The fault location method when multiple devices jump in series according to claim 6 is characterized in that: The control terminal restores the topological states of all the circuit breakers to the topological states before the tripping, and locates the fault section according to the topological states before the tripping, comprising: The position of the circuit breaker farthest from the power supply side boundary among the tripped circuit breakers is obtained, and the fault section is located according to the protection range of the circuit breaker.

8. A power transmission system, characterized in that: The power transmission system includes a control terminal and multiple transmission lines, each of which is provided with multiple circuit breakers connected in series, and the circuit breakers are communicatively connected to the control terminal; the power transmission system is used to execute the fault locating method when multiple devices trip in series as described in any one of claims 1 to 7.

9. A computer device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the fault location method when multiple devices jump in series as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the fault locating method when multiple devices hop in series as described in any one of claims 1 to 7.

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