Overhead line area fault monitoring system and method

Abstract

The invention relates to the technical field of electric power, and provides an overhead line transformer area fault monitoring system and method.The fault monitoring system comprises a server, a host, a Rockwell coil, a coupler and a monitor, the server is in communication connection with the host, and the host is arranged in a transformer area low-voltage switch cabinet; the Rockwell coil is sleeved on a transformer area line, and the output end of the Rockwell coil is connected with the host; the coupler is sleeved on the ground wire and is connected with the host; the monitor is installed on a detected line, is connected with the server and / or the host, and is used for receiving the characteristic signal input to the ground wire through the coupler and sending the corresponding characteristic signal data to the server for fault analysis; or the monitor is used for acquiring the current data of the transformer area line and sending the current data of the transformer area line to the server for fault analysis. According to the invention, on-line accurate positioning can be carried out on leakage faults in a distribution network circuit, monitoring and early warning can be carried out on three-phase imbalance, and power grid safety and electric energy quality are ensured.

Description

Technical Field

[0001] The present disclosure relates to the field of electric power technology, and in particular to an overhead line station area fault monitoring system and method. Background Art

[0002] The existing technology has no effective means to quickly determine and accurately locate leakage faults and three-phase imbalances in distribution network circuits, which will cause the following problems: First, the reliability of power supply is reduced. Leakage of low-voltage lines can easily cause the total leakage protection of the substation to trip, reducing the user's power experience; second, some substations withdraw from the leakage protection or increase the set value, which may cause overheating, fire or electric shock casualties; third, intermittent leakage is difficult to detect and deal with in time, causing damage to the interests of the power grid company.

[0003] The traditional method of troubleshooting leakage faults is generally to conduct line inspections first. If the fault point is found, it will be eliminated. If the fault point is not found, an application is made to exit the leakage protection operation, and the leakage point is found by testing power supply on branches or using a clamp meter to locate the leakage point, which is time-consuming and labor-intensive, and it is easy for the fault point to be missed.

[0004] In addition, the existing technology can only determine whether there is leakage behind the meter (user side) or in the entire substation, but cannot locate the leakage fault point, which affects the line loss management of the substation. And it is impossible to conduct systematic monitoring of problems that affect power quality, such as three-phase imbalance. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide an overhead line area fault monitoring system and method, so as to at least solve the technical problems existing in the prior art that leakage faults and three-phase imbalance in distribution network circuits cannot be accurately detected, affecting the safety of the power grid and the quality of power.

[0006] In order to solve the above technical problems, the embodiments of the present disclosure adopt the following technical solutions:

[0007] In a first aspect, an embodiment of the present disclosure provides an overhead line substation fault monitoring system, comprising a server, a host, a Rockwell coil, a coupler and a monitor, wherein the server is communicatively connected to the host, and the host is arranged in a substation low-voltage switch cabinet; the Rockwell coil is sleeved on the substation line, and the output end of the Rockwell coil is connected to the host, and the Rockwell coil is used to measure the substation line current; the coupler is sleeved on the ground wire and connected to the host, and the coupler is used to input a characteristic signal to the ground wire when a substation line fails; the monitor is installed on the measured line and connected to the server and / or the host, and the monitor is used to receive the characteristic signal and send the corresponding characteristic signal data to the server for fault analysis, or the monitor is used to obtain the current data of the substation line and send the current data of the substation line to the server for fault analysis.

[0008] In some embodiments, the server comprises:

[0009] A leakage detection unit, used for judging whether a leakage fault occurs in the substation line according to the received current data of the Roche coil;

[0010] The leakage locating unit is used to input a characteristic signal to the ground line through the coupler when a leakage fault occurs in the substation line, and receive the characteristic signal data fed back by the monitor 5 to locate the leakage fault.

[0011] In some embodiments, the server comprises:

[0012] A three-phase unbalance detection unit, used for judging whether the substation line has three-phase unbalance according to the current data of the Roche coil;

[0013] The phase adjustment unit is used to obtain the current data of the monitor to perform phase adjustment when the three-phase of the line in the substation area is unbalanced.

[0014] In some embodiments, the host includes a microcontroller unit, a gear adjustment circuit and an integration circuit. The microcontroller unit is respectively connected to the gear adjustment circuit and the integration circuit to control the gear adjustment circuit and the integration circuit. The gear adjustment circuit and the integration circuit are used to integrate and restore the differential signal of the current output by the Rockwell coil, and convert the differential signal into an AC voltage signal for measuring the conductor current.

[0015] In some embodiments, the host further includes a full-wave rectifier circuit connected to the microcontroller unit, and the full-wave rectifier circuit is used to perform full-wave rectification on the current signal output by the Rockwell coil to obtain a rectified signal output to the server.

[0016] In some embodiments, the rectified signal comprises a rectified average value.

[0017] In some embodiments, the host further includes an amplifying circuit for amplifying the current signal output by the Rockwell coil to obtain an amplified signal output to the server.

[0018] In some embodiments, the monitor includes a magnetic core coil sensor, a printed circuit board, and a communication line. The printed circuit board is connected to the magnetic core coil sensor and the communication line respectively. The printed circuit board receives the output signal of the magnetic core coil sensor and transmits the output signal to the server through the communication line.

[0019] In some embodiments, there are multiple monitors, which are respectively installed at each branch point of the substation line, each supporting point of the substation line and the meter box.

[0020] In a second aspect, an embodiment of the present disclosure provides a method for monitoring an overhead line station fault, comprising:

[0021] The invention is applied to an overhead line area fault monitoring system, the overhead line area fault monitoring system comprises a server, a host, a Rockwell coil, a coupler and a monitor, the server is connected to the host in communication, the host is arranged in a low-voltage switch cabinet in the area; the Rockwell coil is sleeved on the area line, and the output end of the Rockwell coil is connected to the host; the coupler is sleeved on the ground wire and connected to the host; the monitor is installed on the measured line and connected to the server, and the method comprises:

[0022] Measuring the line current in the substation area by means of the Roche coil;

[0023] The server determines whether there is a fault in the area line according to the area line current;

[0024] If there is a fault in the substation line, the server performs a fault analysis based on the received characteristic signal data of the monitor or the current data of the monitor, wherein the characteristic signal data of the monitor is generated after the server inputs a characteristic signal to the ground line through the coupler.

[0025] In a third aspect, an embodiment of the present disclosure provides an electronic device, comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned overhead line area fault monitoring system when executing the computer program on the memory.

[0026] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the above-mentioned overhead line area fault monitoring system is implemented.

[0027] The embodiment of the present disclosure provides an overhead line substation fault monitoring system and method, which comprises a server, a host, a Rockwell coil, a coupler and a monitor, wherein the server is communicatively connected to the host, and the host is arranged in a substation low-voltage switch cabinet; the Rockwell coil is sleeved on the substation line, and the output end of the Rockwell coil is connected to the host, and the Rockwell coil is used to measure the substation line current; the coupler is sleeved on the ground wire and connected to the host, and the coupler is used to input a characteristic signal to the ground wire when a substation line fails; the monitor is installed on the measured line and connected to the server and / or the host, and the monitor is used to receive the characteristic signal and send the corresponding characteristic signal data to the server for fault analysis, and the line current data uploaded by the host and the characteristic signal data uploaded by the monitor can be used to accurately locate the leakage fault point online, and monitor and warn the three-phase imbalance of the line, so as to improve the accuracy and efficiency of the overhead line substation line fault monitoring, ensure the safe, stable and reliable operation of the power system, and improve the power quality. In addition, the fault monitoring system provided by the embodiment of the present disclosure can not only locate leakage faults, but also detect three-phase imbalance, and has a reasonable structure, simple monitoring logic, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a structural schematic diagram of the overhead line area fault monitoring system according to an embodiment of the present disclosure;

[0030] Figure 2 The present invention is a flowchart of a method for monitoring faults in an overhead line area according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0032] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0033] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0034] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0035] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0036] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0037] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0038] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0039] Embodiment 1

[0040] Figure 1 The structure diagram of the overhead line area fault monitoring system according to the embodiment of the present disclosure is shown as follows: Figure 1 As shown, an overhead line substation fault monitoring system provided by an embodiment of the present disclosure includes a server 1, a host 2, a Rockwell coil 3, a coupler 4 and a monitor 5, wherein the server 1 is communicatively connected to the host 2, and the host 2 is arranged in a substation low-voltage switch cabinet; the Rockwell coil 3 is sleeved on the substation line, and the output end of the Rockwell coil 3 is connected to the host 2, and the Rockwell coil 3 is used to measure the substation line current; the coupler 4 is sleeved on the ground wire and connected to the host 2, and the coupler 4 is used to input a characteristic signal to the ground wire when a fault occurs in the substation line; the monitor 5 is installed on the measured line and connected to the server 1 and / or the host 2, and the monitor 5 is used to receive the characteristic signal and send the corresponding characteristic signal data to the server 1 for fault analysis, or the monitor 5 is used to obtain the current data of the substation line and send the current data of the substation line to the server 1 for fault analysis.

[0041] Specifically, the server 1 can be a cloud server, which is connected to the host 2 through a wired or wireless network, sends data to the host 2 (for example, sends a fault monitoring start signal), and receives data sent by the host 2 (for example, receives the substation line current data sent by the host 2). The host 2 is a local control device for the substation line, which is used to send control signals to the Roche coil 3, the coupler 4 and the monitor 5, and receive data returned by the Roche coil 3, the coupler 4 and the monitor 5. In the power system, the substation refers to the power supply range or area of ​​(a) transformer.

[0042] The Rockwell coil 3 is a ring coil, which circles each line of the four-phase line in the substation to effectively detect the current of each line. The four-phase line in the substation refers to the transmission line in the low-voltage distribution network using a three-phase four-wire system, including three lines representing the three phases A, B, and C, and the other is the neutral line N or PEN. If the neutral point on the power supply side is grounded, the neutral line is also called the zero line. The neutral line is part of the current loop in the single-phase circuit to ensure the complete loop of the current.

[0043] The four-phase current of the substation is measured by the Rockwell coil 3, and the four-phase current data is transmitted to the server 1 through the host 2. The server 1 can fit and analyze the current data and its vector output by the Rockwell coil 3 to determine whether there is a fault in the substation line. In this embodiment, the substation line fault includes a line leakage fault and a three-phase unbalanced fault.

[0044] When there is a fault in the substation line, the server 1 sends a command through the host 2 to make the coupler 4 input a characteristic signal to the ground line. Since the leakage line is connected to the ground, the monitor 5 on the leakage line can receive the characteristic signal and upload the corresponding characteristic signal data to the server 1, so as to locate the leakage fault point by using the characteristic signal data fed back by the monitor 5, realize real-time online monitoring and accurate positioning of the leakage fault, and ensure the safety of the power grid and the interests of the power grid company. Among them, the characteristic signal data can be the above-mentioned characteristic signal, or it can be the characteristic signal data generated based on the characteristic signal.

[0045] When there is three-phase imbalance in the substation line, the server 1 can actively call the current data monitored by the monitor 5 on the three-phase unbalanced line, analyze the current data, and adjust the phase of the three-phase imbalance. By reasonably distributing the three-phase load, the problems caused by excessive load on one phase can be avoided, thereby ensuring the safe, stable and reliable operation of the power system and improving the power quality. At the same time, it can reduce line losses and voltage drops, and provide more stable power quality.

[0046] In this embodiment, the monitor 5 can be directly connected to the server for communication, or can be connected to the server for communication through the host 2 for data transmission.

[0047] The fault monitoring system provided by the embodiment of the present disclosure is provided with a server 1, a host 2, a Roche coil 3, a coupler 4 and a monitor 5, wherein the server 1 is communicatively connected with the host 2, and the host 2 is arranged in a low-voltage switch cabinet in a substation area; the Roche coil 3 is sleeved on the substation area line, and the output end of the Roche coil 3 is connected to the host 2, and the Roche coil 3 is used to measure the substation area line current; the coupler 4 is sleeved on the ground wire and connected to the host 2, and the coupler 4 is used to input a characteristic signal to the ground wire when a fault occurs in the substation area line; the monitor 5 is installed on the measured line and connected to the server 1 and / or the host 2, and the monitor 5 is used to receive the characteristic signal and send the corresponding characteristic signal data to the server 1 for fault analysis, and the line current data uploaded by the host 2 and the characteristic signal data uploaded by the monitor 5 can be used to accurately locate the leakage fault point online, and monitor and warn the three-phase imbalance of the line, so as to improve the accuracy and efficiency of the overhead line substation area line fault monitoring, ensure the safety of the power grid, ensure the stable and reliable operation of the power system, and improve the power quality. In addition, the fault monitoring system provided by the embodiment of the present disclosure can not only locate leakage faults, but also detect three-phase imbalance, and has a reasonable structure, simple monitoring logic, and a wide range of applications.

[0048] In some embodiments, Figure 1 As shown, the server 1 includes:

[0049] A leakage detection unit 11, used for judging whether a leakage fault occurs in the substation line according to the received current data of the Roche coil 3;

[0050] The leakage locating unit 12 is used to input a characteristic signal to the ground line through the coupler 4 when a leakage fault occurs in the substation line, and receive the characteristic signal data fed back by the monitor 5 to locate the leakage fault.

[0051] The server 1 fits and analyzes the current data and vector sum output by the Rockwell coil 3 to determine whether the substation line has leakage. If the substation line has leakage, the server 1 inputs a characteristic signal to the ground wire through the coupler 4. The monitor 5 at the leakage position can receive the characteristic signal and generate corresponding characteristic signal data, and upload the characteristic signal data to the server 1. The server 1 decodes and matches the characteristic signal data, and can obtain the positioning data of the leakage fault point according to the positioning of the monitor 5, thereby realizing the online precise positioning of the leakage fault point.

[0052] In some embodiments, Figure 1 As shown, the server 1 includes:

[0053] A three-phase unbalance detection unit 13, used to determine whether the substation line has three-phase unbalance according to the current data of the Roche coil 3;

[0054] The phase adjustment unit 14 is used to obtain the current data of the monitor 5 and perform phase adjustment when the three-phase of the line in the substation area is unbalanced.

[0055] Specifically, the three-phase imbalance detection unit 13 determines the three-phase imbalance when the sum of the single-phase current and the three-phase current exceeds a preset threshold. For example, the server 1 calculates the three-phase imbalance (also called three-phase imbalance) according to the current data uploaded by the host 2. The calculation formula of the three-phase imbalance is as follows:

[0056]

[0057] If the calculated three-phase imbalance is greater than a%, where a% is the judgment threshold for setting the three-phase imbalance, it is determined that there is three-phase imbalance in the substation line. At this time, the phase adjustment unit 14 can call the current data uploaded by the monitor 5 on the line, calculate the total power within a period of time, and calculate the current adjustment value.

[0058] Adjustment value = ω1*Max+ω2*Min, where Max is the maximum value of the three-phase current and Min is the minimum value of the three-phase current ω1+ω2=1; for example, ω1 is 3 / 7 and ω2 is 4 / 7.

[0059] The phase adjustment unit 14 of the server 1 queries or fits the current data uploaded by the monitor 5, finds the current data closest to the adjustment value, re-verifies the three-phase imbalance after simulating the phase adjustment, outputs the location of the relevant monitor 5, outputs the phase adjustment suggestion and verifies the three-phase imbalance.

[0060] As can be seen from the above, server 1 manages and locates the relevant data of host 2, Rockwell coil 3, coupler 4 and monitor 5. Server 1 saves the current signal of Rockwell coil 3 uploaded by host 2 and performs vector sum, three-phase imbalance and other calculations to determine whether the four-phase line in the substation is faulty. If leakage occurs, server 1 sends a command to host 2, injects characteristic signals into the ground wire through coupler 4, and server 1 decodes and matches the characteristic signal data uploaded by monitor 5, so as to accurately locate the leakage fault point; if three-phase imbalance occurs, server 1 analyzes and calculates according to the current data uploaded by monitor 5, and gives corresponding phase adjustment suggestions.

[0061] Furthermore, the host 2 includes a microcontroller unit (MCU), a gear adjustment circuit and an integration circuit. The microcontroller unit is respectively connected to the gear adjustment circuit and the integration circuit to control the gear adjustment circuit and the integration circuit; the gear adjustment circuit and the integration circuit are used to integrate and restore the differential signal of the current output by the Rockwell coil, and convert the differential signal into an AC voltage signal for measuring the conductor current.

[0062] MCU is the main control unit of host 2, which is used to control each circuit. When measuring the conductor current, the Rockwell coil 3 outputs a current differential signal. After receiving the differential signal, the MCU of host 2 integrates and restores the differential signal output by the Rockwell coil 3 through the gear adjustment circuit and the integration circuit, and converts it into an AC voltage signal for measuring the conductor current, and then sends the AC voltage signal to server 1. Server 1 analyzes the AC voltage signal to determine whether there is a line fault in the substation area.

[0063] Furthermore, the host 2 also includes a full-wave rectifier circuit connected to the micro control unit, and the full-wave rectifier circuit is used to full-wave rectify the current signal output by the Roche coil 3 to obtain a rectified signal output to the server 1.

[0064] Specifically, the full-wave rectifier circuit performs full-wave rectification on the signal output by the integration circuit, converting it into a signal form (rectified signal) that can be used subsequently, facilitating information transmission.

[0065] Optionally, the rectified signal includes a rectified average value. The Roche coil 3 adopts a rectified average value method, and measures its average value through the internal circuit of the host 2, specifically: the current average value is obtained after full-wave rectification through a full-wave rectifier circuit, and then the current average value within a period of time is packaged and uploaded to the server 1. Avoid inaccurate monitoring caused by current fluctuations when monitoring each current value, and at the same time, reduce the amount of data processing and improve monitoring efficiency.

[0066] Furthermore, the host 2 also includes an amplifier circuit for amplifying the current signal output by the Roche coil 3 to obtain an amplified signal output to the server 1 .

[0067] Similar to the full-wave rectifier circuit, the amplifier circuit amplifies the signal output by the integration circuit and converts it into a signal form (amplified signal) that can be used later.

[0068] The hardware of the host 2 may also include AC / DC circuits, display screens, buttons, filter circuits, signal conditioning circuits, current limiting resistors, analog channel switches, current sampling circuits, voltage divider circuits, voltage follower circuits, half-bridge circuits and communication circuits, etc. The specific structure is set according to actual needs and is not specifically limited in this disclosure.

[0069] In some embodiments, the monitor 5 includes a magnetic core coil sensor, a printed circuit board (PCB) and a communication line. The printed circuit board is connected to the magnetic core coil sensor and the communication line respectively. The printed circuit board receives the output signal of the magnetic core coil sensor and transmits the output signal to the server 1 through the communication line.

[0070] The monitor 5 is fixed on the circuit under test, and the PCB is the main control circuit board of the monitor 5. The PCB is connected to the server 1 and / or the host 2 through a communication line, and can transmit the output signal of the magnetic core coil sensor directly or indirectly to the server 1. The server 1 analyzes the characteristic signal data or current data monitored by the monitor 5 to locate the leakage fault or adjust the phase.

[0071] Each line in the substation line can be used as a measured line, and a monitor 5 can be installed on each measured line. Preferably, the monitor 5 is installed at each branch point of the substation line, the support point of the substation line and the meter box, which can effectively detect common leakage potential points such as line branch points or fixed points, and the monitoring is convenient and accurate, and it is convenient for substation line management. For example, the monitor 5 is installed at the branch point to monitor the leakage fault of each branch section (branch line), which is helpful for the substation line loss management.

[0072] It can be understood that in this embodiment, when the three-phase imbalance detection unit 13 detects three-phase imbalance, the phase adjustment unit 14 can search for the current data and adjustment value uploaded by the monitor 5 of each branch point for analysis, and give branch point adjustment suggestions to ensure the stability and safety of power supply.

[0073] Embodiment 2

[0074] Figure 2 A flow chart of a method for monitoring an overhead line fault in an embodiment of the present disclosure is shown. Figure 2 As shown, an embodiment of the present disclosure provides an overhead line station area fault monitoring method, which is applied to the above-mentioned overhead line station area fault monitoring system, the overhead line station area fault monitoring system includes a server 1, a host 2, a Roche coil 3, a coupler 4 and a monitor 5, the server 1 is connected to the host 2 for communication, the host 2 is arranged in a low-voltage switch cabinet in the station area; the Roche coil 3 is sleeved on the station area line, and the output end of the Roche coil 3 is connected to the host 2; the coupler 4 is sleeved on the ground wire and connected to the host 2; the monitor 5 is installed on the measured line and connected to the server 1, the method includes:

[0075] S101: measuring the line current in the substation area by using the Roche coil 3;

[0076] S102: The server 1 determines whether there is a fault in the area line according to the area line current;

[0077] S103: If there is a fault in the substation line, the server 1 performs a fault analysis based on the received characteristic signal data of the monitor 5 or the current data of the monitor 5, wherein the characteristic signal data of the monitor 5 is generated after the server 1 inputs a characteristic signal to the ground wire through the coupler 4.

[0078] The monitor 5 can directly monitor the current of the substation line and obtain current data.

[0079] In some embodiments, step S103 specifically includes:

[0080] S1031: If there is a leakage fault in the area line, the server 1 inputs a characteristic signal to the ground line through the coupler 4;

[0081] S1032: The server 1 locates the leakage fault point by receiving the characteristic signal data fed back by the monitor 5 of the characteristic signal.

[0082] In steps S1031 and S1032, the server 1 can determine whether a leakage fault occurs in the substation line based on the substation line current measured by the Rockwell coil 3 uploaded by the host 2, and when a leakage fault occurs, the leakage fault point is accurately located online through the characteristic signal data uploaded by the monitor 5, thereby solving the problem that the leakage fault point cannot be accurately located online in the prior art.

[0083] In some embodiments, step S103 specifically includes:

[0084] S1033: If there is three-phase imbalance in the substation line, the server 1 receives the current data from the monitor 5 and performs phase adjustment analysis based on the current data.

[0085] In this step, the server 1 determines whether there is three-phase imbalance in the substation line based on the substation line current measured by the Roche coil 3 uploaded by the host 2, and when there is three-phase imbalance, outputs corresponding phase adjustment suggestions through the current data uploaded by the monitor 5 to ensure stable and balanced power supply.

[0086] The overhead line area fault monitoring method provided in the embodiment of the present disclosure corresponds to the overhead line area fault monitoring system of the above-mentioned embodiment. Any optional items in the embodiment of the overhead line area fault monitoring system are also applicable to the embodiment of the overhead line area fault monitoring method, which will not be repeated here.

[0087] Embodiment 3

[0088] An embodiment of the present disclosure also provides an electronic device, comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned overhead line area fault monitoring system when executing the computer program on the memory.

[0089] In some embodiments, the processor executing the computer program may be a processing device including one or more general-purpose processing devices, such as a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), etc. More specifically, the processor may be a complex instruction set computing (CISC) microprocessor, a reduced instruction set computing (RISC) microprocessor, a very long instruction word (VLIW) microprocessor, a processor running other instruction sets, or a processor running a combination of instruction sets. The processor may also be one or more special-purpose processing devices, such as an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a digital signal processor (DSP), a system on a chip (SoC), etc.

[0090] The memory may be a read-only memory (ROM), a random access memory (RAM), a phase-change random access memory (PRAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), an electrically erasable programmable read-only memory (EEPROM), other types of random access memory (RAM), a flash disk or other form of flash memory, a cache, a register, a static memory, a compact disk read-only memory (CD-ROM), a digital versatile disk (DVD) or other optical storage, a cassette or other magnetic storage device, or any other possible non-temporary medium used to store information or instructions that can be accessed by a computer device.

[0091] The electronic devices of the embodiments of the present disclosure may include but are not limited to fixed terminal devices such as servers, desktop computers, digital TVs, etc., and mobile terminal devices such as vehicle-mounted devices (such as head-up display devices), handheld devices (such as mobile phones, tablet computers, etc.), wearable devices (such as smart watches, smart bracelets, etc.), etc.

[0092] Embodiment 4

[0093] The embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned overhead line station area fault monitoring system is implemented.

[0094] The computer-readable storage medium of the embodiments of the present disclosure may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. In the embodiments of the present disclosure, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device, for example, the above-mentioned memory.

[0095] The computer programs of the embodiments of the present disclosure may be organized into one or more computer executable components or modules. Any number and combination of such components or modules may be used to implement the various aspects of the present disclosure. For example, the various aspects of the present disclosure are not limited to the specific computer executable instructions or specific components or modules shown in the drawings and described herein. Other embodiments may include different computer executable instructions or components with more or less functions than those shown and described herein.

[0096] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

Claims

1. An overhead line area fault monitoring system, characterized in that: It includes a server, a host, a Rockwell coil, a coupler and a monitor. The server is connected to the host for communication. The host is arranged in a low-voltage switch cabinet in the substation area. The Rockwell coil is set on the substation area line, and the output end of the Rockwell coil is connected to the host. The Rockwell coil is used to measure the substation area line current. The coupler is placed on the ground wire and connected to the host. The coupler is used to input a characteristic signal to the ground wire when a fault occurs in the station area line; The monitor is installed on the line under test and connected to the server and / or the host. The monitor is used to receive the characteristic signal and send the corresponding characteristic signal data to the server for fault analysis, or the monitor is used to obtain the current data of the substation line and send the current data of the substation line to the server for fault analysis.

2. The overhead line area fault monitoring system according to claim 1, characterized in that: The server comprises: A leakage detection unit, used for judging whether a leakage fault occurs in the substation line according to the received current data of the Roche coil; The leakage locating unit is used to input a characteristic signal to the ground line through the coupler when a leakage fault occurs in the substation line, and receive the characteristic signal data fed back by the monitor 5 to locate the leakage fault.

3. The overhead line area fault monitoring system according to claim 1, characterized in that: The server comprises: A three-phase unbalance detection unit, used for judging whether the substation line has three-phase unbalance according to the current data of the Roche coil; The phase adjustment unit is used to obtain the current data of the monitor to perform phase adjustment when the three-phase of the line in the substation area is unbalanced.

4. The overhead line area fault monitoring system according to claim 1, characterized in that: The host includes a microcontroller unit, a gear adjustment circuit and an integration circuit. The microcontroller unit is respectively connected to the gear adjustment circuit and the integration circuit to control the gear adjustment circuit and the integration circuit. The gear adjustment circuit and the integration circuit are used to integrate and restore the differential signal of the current output by the Rockwell coil, and convert the differential signal into an AC voltage signal for measuring the conductor current.

5. The overhead line area fault monitoring system according to claim 4, characterized in that: The host also includes a full-wave rectifier circuit connected to the micro control unit, and the full-wave rectifier circuit is used to perform full-wave rectification on the current signal output by the Roche coil to obtain a rectified signal output to the server.

6. The overhead line area fault monitoring system according to claim 5, characterized in that: The rectified signal includes a rectified average value.

7. The overhead line area fault monitoring system according to claim 4, characterized in that: The host also includes an amplifier circuit for amplifying the current signal output by the Rockwell coil to obtain an amplified signal output to the server.

8. The overhead line area fault monitoring system according to claim 1, characterized in that: The monitor includes a magnetic core coil sensor, a printed circuit board and a communication line. The printed circuit board is connected to the magnetic core coil sensor and the communication line respectively. The printed circuit board receives the output signal of the magnetic core coil sensor and transmits the output signal to the server through the communication line.

9. The overhead line area fault monitoring system according to claim 1, characterized in that: There are multiple monitors, which are respectively installed at each branch point of the substation line, each supporting point of the substation line and the meter box.

10. A method for monitoring faults in an overhead line area, characterized in that: Applied to an overhead line area fault monitoring system, the overhead line area fault monitoring system comprises a server, a host, a Rockwell coil, a coupler and a monitor, the server is communicatively connected with the host, the host is arranged in a low-voltage switch cabinet in the area; the Rockwell coil is sleeved on the area line, and the output end of the Rockwell coil is connected to the host; The coupler is placed on the ground wire and connected to the host; The monitor is installed on the tested line and connected to the server, and the method comprises: Measuring the line current in the substation area by means of the Roche coil; The server determines whether there is a fault in the area line according to the area line current; If there is a fault in the substation line, the server performs a fault analysis based on the received characteristic signal data of the monitor or the current data of the monitor, wherein the characteristic signal data of the monitor is generated after the server inputs a characteristic signal to the ground line through the coupler.

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