Voltage over-limit fault processing method, device and electronic equipment

Abstract

The present invention provides a method, device and electronic device for handling voltage over-limit faults, and relates to the fields of electrical engineering and power systems. The method includes: obtaining a substation voltage in a power system, and a user voltage at at least one user end in the substation; in the case where the user voltage represents a voltage over-limit fault in the power system, judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and obtaining a substation judgment result; in response to the substation judgment result representing that the voltage over-limit direction is different, determining the abnormal factor of the substation power supply line based on the substation voltage over-limit attribute; in response to the substation judgment result representing that the voltage over-limit direction is the same, performing fault detection based on the equipment operation data related to the main transformer equipment of the power system, and obtaining the equipment abnormal factor, and the equipment abnormal factor represents that the cause of the voltage over-limit fault is the abnormal operation of the main transformer equipment or the equipment electrically connected to the main transformer equipment.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering and power systems, and more specifically, to a method, device and electronic equipment for handling voltage over-limit faults. Background Art

[0002] With the rapid development of the power system, users' demand for electricity has shifted from "having access to electricity" to "using electricity well", and the qualified rate of the power supply voltage at the user end is directly related to the user's power experience. Excessive power supply voltage deviation will affect the stable operation of the power grid and reduce the power transmission capacity of the power system. When the voltage received at the user end deviates greatly from the rated voltage, it may cause the operating performance of the power equipment to deteriorate, reduce the operating efficiency of the power equipment, and may also cause damage to the power equipment due to overvoltage or overcurrent. Therefore, how to quickly and accurately analyze the cause of the voltage over-limit fault at the user end is an important factor in improving the power supply safety and quality of the power system. Summary of the invention

[0003] In view of this, the present invention provides a voltage over-limit fault processing method, device and electronic equipment.

[0004] One aspect of the present invention provides a method for handling a voltage over-limit fault, comprising: obtaining a substation voltage of a substation in an electric power system and a user voltage of at least one user end in the substation; in a case where the user voltage represents a voltage over-limit fault of the electric power system, judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and obtaining a substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage; in response to the substation judgment result representing that the voltage over-limit directions are different, determining a substation power supply line abnormality factor based on the substation voltage over-limit attribute, wherein the substation power supply line abnormality factor represents that the cause of the voltage over-limit fault is an abnormality of the substation power supply line between the substation and the user end; in response to the substation judgment result representing that the voltage over-limit directions are the same, performing fault detection based on equipment operation data related to the main transformer equipment in the electric power system, and obtaining an equipment abnormality factor, wherein the equipment abnormality factor represents that the cause of the voltage over-limit fault is an abnormal operation of the main transformer equipment or an equipment electrically connected to the main transformer equipment.

[0005] Another aspect of the present invention provides a voltage over-limit fault processing device, comprising: an acquisition module, used to acquire a substation voltage in a substation in a power system, and a user voltage of at least one user end in the substation; a substation judgment result acquisition module, used to determine whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage when the user voltage represents a voltage over-limit fault of the power system, and obtain a substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage; and a substation power supply line abnormality factor determination module, used to respond to The substation judgment result indicates that the voltage over-limit direction is different. Based on the substation voltage over-limit attribute, the substation power supply line abnormality factor is determined, and the substation power supply line abnormality factor indicates that the cause of the voltage over-limit fault is the abnormality of the substation power supply line between the substation and the user end; an equipment abnormality factor acquisition module is used to respond to the substation judgment result indicating that the voltage over-limit direction is the same, perform fault detection based on equipment operation data related to the main transformer equipment in the power system, and obtain the equipment abnormality factor, and the equipment abnormality factor indicates that the cause of the voltage over-limit fault is the abnormal operation of the main transformer equipment or the equipment electrically connected to the main transformer equipment.

[0006] Another aspect of the present invention provides an electronic device, comprising:

[0007] one or more processors;

[0008] a memory for storing one or more programs,

[0009] When the one or more programs are executed by the one or more processors, the one or more processors implement a voltage over-limit fault processing method.

[0010] Another aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions, wherein the instructions are used to implement a voltage over-limit fault processing method when executed.

[0011] Another aspect of the present invention provides a computer program product, the computer program product comprising computer executable instructions, the instructions being used to implement a voltage over-limit fault processing method when executed.

[0012] According to an embodiment of the present invention, the cause of the voltage over-limit of the power system is accurately determined by determining whether the voltage over-limit directions of the substation voltage and the user voltage are consistent, thereby performing a refined analysis of the voltage over-limit faults of a more complex power system, improving the accuracy of the cause analysis of the voltage over-limit faults and the efficiency of the fault cause analysis, helping to efficiently eliminate the voltage over-limit faults and improve the operating stability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0014] Figure 1 An exemplary system architecture to which the voltage over-limit fault processing method and apparatus according to an embodiment of the present invention can be applied is shown.

[0015] Figure 2 A flow chart of a method for handling a voltage over-limit fault according to an embodiment of the present invention is shown.

[0016] Figure 3A and Figure 3B A flow chart of a voltage over-limit fault processing method provided according to another embodiment of the present invention is shown.

[0017] Figure 4 A schematic diagram of an interactive interface provided according to an embodiment of the present invention is shown.

[0018] Figure 5 A block diagram of a voltage over-limit fault processing device according to an embodiment of the present invention is shown.

[0019] Figure 6 A block diagram of an electronic device suitable for implementing a voltage over-limit fault processing method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0020] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0021] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0022] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0023] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0024] In the embodiments of the present invention, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage and other aspects of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security and national security.

[0025] In the embodiment of the present invention, before obtaining or collecting the user's personal information, the user's authorization or consent is obtained.

[0026] The inventors have found that low voltage in the power system will greatly increase the active power loss, reactive power loss and voltage loss of the power grid. If the voltage in the power system is high, the corona loss will increase. Low or high voltage in the power system will increase the power supply cost of the power system, affect the service life of user-side electrical equipment, and reduce the quality of power consumption for users. Therefore, it is necessary to more accurately determine the cause of voltage over-limit faults during the operation of the power system to ensure the safety, economy and quality of power supply.

[0027] The embodiment of the present invention provides a method, device and electronic device for handling voltage over-limit faults. The method for handling voltage over-limit faults includes: obtaining a substation voltage of a substation in a power system and a user voltage of at least one user end in the substation; in the case where the user voltage represents a voltage over-limit fault of the power system, judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and obtaining a substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage; in response to the substation judgment result representing that the voltage over-limit direction is different, based on the substation voltage over-limit attribute, determining the substation power supply line abnormality factor, the substation power supply line abnormality factor represents that the cause of the voltage over-limit fault is the substation power supply line abnormality between the substation and the user end; in response to the substation judgment result representing that the voltage over-limit direction is the same, performing fault detection based on the equipment operation data related to the main transformer equipment in the power system, and obtaining the equipment abnormality factor, the equipment abnormality factor represents that the cause of the voltage over-limit fault is the main transformer equipment or the equipment electrically connected to the main transformer equipment.

[0028] According to an embodiment of the present invention, when the user voltage is detected to indicate that a voltage over-limit fault has occurred in the power system, by judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage, different problem tracing logics are selected, and the cause of the voltage over-limit fault can be analyzed more accurately and comprehensively. When the substation judgment result indicates that the voltage over-limit direction is the same, it is determined that the cause of the voltage over-limit fault is the abnormal operation of the main transformer device or the related power equipment electrically connected to the main transformer device, and when the substation judgment result indicates that the voltage over-limit direction is different, it is determined that the substation power supply line between the substation and the user end is abnormal as the cause of the voltage over-limit fault. It can be achieved by accurately determining the cause of the voltage over-limit of the power system by whether the voltage over-limit directions of the substation voltage and the user voltage are consistent, thereby performing a refined analysis of the voltage over-limit fault of a more complex power system, improving the accuracy of the cause analysis of the voltage over-limit fault and the efficiency of the fault cause analysis, which helps to efficiently eliminate the voltage over-limit fault and improve the operational stability of the power system.

[0029] Figure 1 The exemplary system architecture to which the voltage over-limit fault processing method and device according to the embodiment of the present invention can be applied is shown. It should be noted that: Figure 1 The examples shown are merely examples of system architectures to which the embodiments of the present invention may be applied, to help those skilled in the art understand the technical content of the present invention, but do not mean that the embodiments of the present invention may not be used in other devices, systems, environments or scenarios.

[0030] like Figure 1 As shown, the system architecture 100 according to this embodiment may include a power system, a terminal device 101, a network 102, and a server 103. The power system includes a main transformer substation 110 and a substation area, and the main transformer substation 110 may include a main transformer device and electrical equipment electrically connected to the main transformer device through a busbar. The electrical equipment electrically connected to the main transformer device through a busbar can be understood as main transformer-related equipment, and the main transformer device may include electrical equipment such as a main transformer.

[0031] The substation area may include a distribution transformer 120 and multiple user terminals 130. The distribution transformer 120 may include related electrical equipment such as a distribution transformer. The distribution transformer 120 may be electrically connected to the main substation 110 through a 10kv line. The multiple user terminals 130 may include the first user terminal... to the nth user terminal. The multiple user terminals 130 may be electrically connected to the distribution transformer 120 through the substation area power supply line. For example, the distribution transformer 120 may supply power to the first user terminal through a 380V line, and the distribution transformer 120 may supply power to the nth user terminal through a 220V line.

[0032] The terminal device 101 may be any electronic device having a display screen and supporting web browsing, including but not limited to a smart phone, a tablet computer, a laptop computer, a desktop computer, and the like.

[0033] The network 102 is used to provide a medium for a communication link between the terminal device 101, the power system, and the server 103. The network 102 may include various connection types, such as wired and / or wireless communication links, and the like.

[0034] The server 103 may be a server that provides various services, such as a background management server (only as an example) that provides support for websites browsed by users using the terminal device 101. The background management server may analyze and process received data such as user requests, and feed back processing results (such as web pages, information, or data obtained or generated according to user requests) to the terminal device.

[0035] It should be noted that the voltage over-limit fault processing method provided in the embodiment of the present invention can generally be executed by the server 103. Accordingly, the voltage over-limit fault processing device provided in the embodiment of the present invention can generally be set in the server 103. The voltage over-limit fault processing method provided in the embodiment of the present invention can also be executed by a server or server cluster that is different from the server 103 and can communicate with the terminal device 101 and / or the server 103. Accordingly, the voltage over-limit fault processing device provided in the embodiment of the present invention can also be set in a server or server cluster that is different from the server 103 and can communicate with the terminal device 101 and / or the server 103. Alternatively, the voltage over-limit fault processing method provided in the embodiment of the present invention can also be executed by the terminal device 101 or by other terminal devices different from the terminal device 101. Accordingly, the voltage over-limit fault processing device provided in the embodiment of the present invention can also be set in the terminal device 101 or in other terminal devices different from the terminal device 101.

[0036] It should be noted that Figure 1 The topological structure of the electrical connection between the distribution transformer 120 and the multiple user terminals 130 shown in the figure is only exemplary. The method provided in the embodiment of the present invention can be applied to any power supply topology between the distribution transformer and the user terminals in the substation. Figure 1 The main transformer equipment, electrical equipment, distribution transformer equipment and user end involved are only exemplary. The embodiments of the present invention do not limit the number and electrical connection method of the main transformer equipment, electrical equipment, distribution transformer equipment and user end in the power system.

[0037] Figure 2 A flow chart of a method for handling a voltage over-limit fault according to an embodiment of the present invention is shown.

[0038] like Figure 2As shown, the voltage over-limit fault processing method includes operations S210-S240.

[0039] In operation S210, a substation voltage in a power system and a user voltage of at least one user terminal in the substation are acquired.

[0040] In operation S220, when the user voltage represents a voltage over-limit fault of the power system, it is determined whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and a substation determination result is obtained.

[0041] In operation S230, in response to the substation determination result indicating that the voltage exceeds the limit in different directions, an abnormal factor of the power supply line in the substation is determined based on the substation voltage exceeding the limit attribute.

[0042] In operation S240, in response to the substation judgment result indicating that the voltages are in the same direction, fault detection is performed based on equipment operation data related to the main transformer equipment in the power system to obtain equipment abnormality factors.

[0043] According to an embodiment of the present invention, the user voltage can be understood as the inlet voltage of the user end. The user voltage represents a voltage over-limit fault of the power system, which may include the user voltage exceeding the upper limit or the user voltage exceeding the lower limit.

[0044] According to an embodiment of the present invention, the substation voltage attribute characterizes the voltage over-limit situation of the substation voltage. The substation voltage may represent the outlet voltage of the distribution transformer on the substation side, for example, the outlet voltage of the distribution transformer. The substation voltage attribute may include the substation voltage over-limit or the substation voltage over-limit, or may also include the substation voltage not over-limit.

[0045] According to an embodiment of the present invention, the voltage over-limit direction may include that the user voltage exceeds the upper limit, the station voltage exceeds the lower limit, or the station voltage exceeds the upper limit, the user voltage exceeds the lower limit. However, it is not limited to this, and may also include that the user voltage exceeds the upper limit or the user voltage exceeds the lower limit, and the station voltage does not exceed the limit.

[0046] According to an embodiment of the present invention, the abnormal factor of the substation power supply line characterizes that the cause of the voltage over-limit fault is the abnormality of the substation power supply line between the substation and the user end. By determining that the voltage over-limit directions of the substation voltage and the user voltage are different, it can be relatively quickly determined that the factor of the voltage over-limit fault in the power system is the abnormality of the substation power supply line. In this way, when the power supply topology of the power distribution equipment of the power system supplying power to the user end is relatively complex, it can be relatively quickly and accurately determined that the fault range causing the user voltage over-limit is the substation power supply line between the user end with the voltage over-limit and the power distribution equipment of the substation to which it belongs, thereby avoiding the voltage over-limit analysis by analyzing the more complex power supply topology.

[0047] According to an embodiment of the present invention, the equipment abnormality factor indicates that the cause of the voltage over-limit fault is that the main transformer equipment or the equipment electrically connected to the main transformer equipment is operating abnormally. The main transformer equipment may include a main transformer, and the equipment electrically connected to the main transformer equipment may include any electrical equipment such as a switch cabinet equipment and a main transformer reactive power compensation device. The embodiment of the present invention does not limit the specific type of equipment electrically connected to the main transformer equipment.

[0048] According to an embodiment of the present invention, when the voltage over-limit direction is the same, by detecting the equipment operation data related to the main transformer equipment for fault detection, the fault detection range of the voltage over-limit fault detection can be determined relatively quickly and accurately, so that the cause of the voltage over-limit fault can be further determined relatively accurately as the lakeside equipment or the electrical equipment related to the main transformer equipment. In this way, the automatic fault range division and fault cause detection of the voltage over-limit fault can be realized, the detection efficiency and detection accuracy of the cause of the voltage over-limit fault in the power system can be improved, and it is helpful to efficiently eliminate the voltage over-limit fault in the power system.

[0049] In one example, it can be explained based on the following Table 1:

[0050] Table 1

[0051]

[0052] In an example, the voltage over-limit fault processing method provided in the embodiment of the present invention may be performed based on the following principles (1) and (2).

[0053] When a user exceeds the limit, the voltage problem is traced from bottom to top based on the user, substation, line, and main transformer tracing ideas, with the principle of finding the superior for over-limit in the same direction and the same level for over-limit in the opposite direction.

[0054] Principle (1) Tracing back to the upper level for over-limit in the same direction: Over-limit in the same direction means that the user voltage and the power supply voltage of the substation exceed the upper limit or the lower limit at the same time. When over-limit in the same direction occurs, the upper level bus of the substation power distribution equipment should be traced first. According to the over-limit conditions of the voltage at the user end, the distribution transformer and the bus, the voltage adjustment gear of the main transformer and the distribution transformer, and the switching conditions of the reactive compensator, 28 over-limit scenarios in the same direction can be determined as shown in Tables 3.1 to 3.10.

[0055] Principle (2) Reverse over-limit tracing back to the same level: Reverse over-limit refers to the situation where the user voltage and the substation power supply voltage are over-limited in different directions. For example, the user voltage is over-limited but the substation power supply voltage is not, or the user voltage is about the upper limit and the substation power supply voltage is over-limited. When reverse over-limit occurs, the source is traced back to the voltage outlet of the substation power distribution equipment at the same level. According to the over-limit situation of user voltage and distribution equipment voltage (also called substation power supply voltage), it can be summarized into the four reverse over-limit scenarios shown in Table 2.

[0056] In one example, the data obtained, such as user voltage and substation power supply voltage, can be optimized to improve the efficiency of fault analysis and the accuracy of fault cause determination. Data optimization can include screening the collected raw data, mainly to exclude invalid data and abnormal data, which can be considered from two aspects: the number of sampling points and the voltage value range.

[0057] For example, the bus voltage values ​​are all derived from the dispatching system, with 1440 sampling points per day. The power supply voltage and user voltage of the substation are all derived from the power consumption collection system. The sampling points of the substation voltage and high-voltage user end are both 96 points per day, and the sampling points of the low-voltage user end are mostly 24 points per day. In order to improve the efficiency of tracing, different thresholds for the number of sampling points of the original voltage for tracing are set, and the voltage is traced after it exceeds the threshold. The bus voltage is traced after it is continuously collected for 3 or more times and the voltage exceeds the limit; the substation and high-voltage user are traced after it is continuously collected for 2 or more times and the voltage exceeds the limit; the low-voltage user is traced after it is collected for 1 or more times and the voltage exceeds the limit.

[0058] For another example, when the collected voltage value data exceeds the rated voltage value of the voltage over-limit by 30% or more, the collected voltage value data is considered to be abnormal data, and the abnormal data is not used to execute the voltage over-limit fault processing method provided in the embodiment of the present invention.

[0059] According to an embodiment of the present invention, based on the substation voltage over-limit attribute, determining the abnormal factor of the substation power supply line may include: determining the first abnormal factor when the substation voltage over-limit attribute represents that the substation voltage is over an upper limit, or the substation voltage over-limit attribute represents that the substation voltage is not over-limit, and the voltage over-limit direction of the user voltage represents that the user voltage is over a lower limit; and determining the second abnormal factor when the substation voltage over-limit attribute represents that the substation voltage is over a lower limit, or the substation voltage over-limit attribute represents that the substation voltage is not over-limit, and the voltage over-limit direction of the user voltage represents that the user voltage is over an upper limit.

[0060] According to an embodiment of the present invention, the first abnormal factor characterizes the abnormal line length of the substation power supply line. When the user voltage is lower than the lower limit, and the substation voltage is higher than the upper limit or the substation voltage does not exceed the limit, it can be relatively quickly determined that the first abnormal factor is that the line length of the substation power supply line is too long (or the power supply radius is too long), causing a large voltage drop between the distribution equipment and the user end, so that it can be relatively accurately and quickly determined that the layout mode of the power supply line topology between the substation power distribution equipment and the user end or the configuration and power supply mode of the power supply line topology is unreasonable, causing the voltage over-limit fault. The voltage over-limit fault of the power system can be quickly eliminated by modifying the substation power supply line or changing the power supply topology configuration and power supply mode, thereby improving the troubleshooting efficiency.

[0061] According to the embodiment of the present invention, the power supply line of the substation area may include an above-ground or underground cable, and the embodiment of the present invention does not limit the specific line type of the power supply line of the substation area.

[0062] According to an embodiment of the present invention, the second abnormal factor characterizes the abnormal charging power of the substation power supply line. For example, it can indicate that the charging power of the substation power supply line between the power distribution equipment and the user end where the voltage exceeds the limit is too high. By determining that the user voltage exceeds the upper limit, and the substation voltage exceeds the lower limit or does not exceed the limit, it is determined that the charging power of the substation power supply line is too high. It is relatively convenient to adjust the topological structure of the substation power supply line to configure the power supply mode or reduce the charging power, so as to more efficiently eliminate the voltage limit fault of the power system.

[0063] According to an embodiment of the present invention, the voltage over-limit fault processing method may further include: determining a first type of fault elimination strategy in response to a first abnormal factor; and determining a second type of fault elimination strategy in response to a second abnormal factor.

[0064] According to an embodiment of the present invention, the first type of troubleshooting strategy is characterized by shortening the line length of the power supply line in the substation. The first type of troubleshooting strategy can be, for example, to modify the power supply line in the substation to shorten the line length. However, it is not limited to this. The first type of troubleshooting strategy can also include modifying the configuration of the power supply topology of the substation by configuring the power supply mode, so that the user end where the user voltage exceeds the limit is electrically connected to other distribution equipment, so as to shorten the line length of the substation power supply line between the user end and the distribution equipment.

[0065] According to an embodiment of the present invention, the second type of troubleshooting strategy is characterized by reducing the line charging power of the power supply line in the substation. The second type of troubleshooting strategy may include modifying the power distribution equipment or adjusting the operating parameters, or may also include modifying the configuration of the power supply mode of the power supply topology of the substation to reduce the charging power of the power supply line between the user end and the power distribution equipment. Alternatively, the second type of troubleshooting strategy may also include modifying the power supply line in the substation to reduce the charging power.

[0066] In an example, the cause of the voltage over-limit fault in the power system can be determined by the contents of Table 2 below, and the line or power supply configuration of the substation power supply line can be modified in combination with the fault elimination strategy.

[0067] Table 2

[0068]

[0069] According to an embodiment of the present invention, fault detection is performed based on equipment operation data related to the main transformer equipment in the power system to obtain equipment abnormality factors, which may also include: judging whether the bus voltage over-limit direction of the bus voltage is the same as the user voltage over-limit direction, and obtaining a bus judgment result; in response to the bus judgment result indicating that the voltage over-limit directions are different, fault detection is performed based on the distribution transformer operation data of the distribution transformer equipment in the substation to obtain a first type of equipment abnormality factor; in response to the bus judgment result indicating that the voltage over-limit directions are the same, fault detection is performed based on the main transformer operation data of the main transformer equipment to obtain a second type of equipment abnormality factor.

[0070] According to an embodiment of the present invention, the bus voltage is the equipment operation data of the bus related to the main transformer device. The bus voltage may be, for example, the voltage value of the bus between the main transformer device and the main transformer related equipment. The bus voltage over-limit direction may include the bus voltage over-limit, the bus voltage over-limit, or the bus voltage not over-limit.

[0071] According to an embodiment of the present invention, the distribution transformer is electrically connected to the main transformer. For example, the distribution transformer can be electrically connected to the main transformer based on a high-voltage power supply line.

[0072] According to an embodiment of the present invention, the first type of equipment abnormality factors characterizes the cause of the voltage over-limit fault as: abnormal bus operation or abnormal distribution transformer operation. The bus operation abnormality may include equipment operation abnormalities such as whether there are defects in the bus body or connection method, or the bus operation abnormality may also include that the bus power supply radius is too long or the bus charging power is too high.

[0073] According to an embodiment of the present invention, the second type of equipment abnormality factor indicates that the cause of the voltage over-limit fault is the abnormal operation of the main transformer equipment. The abnormal operation of the main transformer equipment may indicate that the main transformer or related electrical equipment electrically connected to the main transformer is abnormal.

[0074] For example, the abnormal operation of the main transformer equipment refers to whether there are equipment operation defects in the secondary equipment related to the main transformer equipment, such as the line protection and control cabinet, the main transformer protection and control cabinet and other secondary equipment, whether there are equipment operation abnormalities such as operation configuration parameter defects, equipment failures, etc.

[0075] It should be understood that the device abnormality factors may include first-category device abnormality factors and second-category device abnormality factors.

[0076] According to an embodiment of the present invention, in response to a busbar judgment result indicating that the voltage over-limit direction is different, fault detection is performed based on the distribution transformer operation data of the distribution transformer equipment in the substation, and the first type of equipment abnormality factors include: determining the distribution transformer reactive compensation operation state based on the operation data of the distribution transformer reactive compensator of the distribution transformer equipment; determining that the cause of the voltage over-limit fault is abnormal operation of the distribution transformer reactive compensator when the distribution transformer reactive compensation operation state indicates that there is a switchable distribution transformer reactive compensator in the distribution transformer equipment; determining that the cause of the voltage over-limit fault is abnormal operation of the distribution transformer reactive compensator when the distribution transformer reactive compensation operation state indicates that there is no switchable distribution transformer reactive compensator in the distribution transformer equipment, judging whether the distribution transformer equipment has an adjustable distribution transformer voltage operation gear; determining that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operation gear when the distribution transformer reactive compensation operation state indicates that there is no switchable distribution transformer reactive compensator in the distribution transformer equipment.

[0077] According to an embodiment of the present invention, the distribution transformer reactive compensation operation state can characterize whether there is a distribution transformer reactive compensator that can be switched in the distribution transformer equipment, and the distribution transformer reactive compensator can be used to control the reactive voltage of the distribution transformer voltage regulator. The operation data of the distribution transformer reactive compensator can include the number or operation parameters of the distribution transformer reactive compensators that can be switched at present.

[0078] According to an embodiment of the present invention, the abnormal operation of the distribution transformer reactive power compensator may indicate that the distribution transformer reactive power compensator cannot be switched on and off.

[0079] In one example, if the bus voltage is below the lower limit or the bus voltage is within the limit, the area power supply voltage is above the upper limit, and the user voltage is above the upper limit, it can be determined that the distribution transformer reactive compensator is abnormally operating because the distribution transformer reactive compensator (such as a capacitor) of the current distribution transformer equipment cannot be switched out. The troubleshooting strategy can be determined to check whether the distribution transformer reactive compensator and the related secondary equipment of the distribution transformer equipment are defective and repair them in time, or to detect whether the switching strategy of the distribution transformer reactive compensator is reasonable and correct the switching strategy in time.

[0080] In one example, the bus voltage is higher than the upper limit, the area power supply voltage is lower than the lower limit, and the user voltage is lower, so it can be determined that the distribution transformer reactive compensator is abnormally operating, and the distribution transformer reactive compensator (such as a capacitor) of the current distribution transformer equipment cannot be put into operation. The troubleshooting strategy can be determined to check whether the distribution transformer reactive compensator and the related secondary equipment of the distribution transformer equipment are defective and repair them in time, or to detect whether the switching strategy of the distribution transformer reactive compensator is reasonable, and correct the switching strategy in time.

[0081] According to an embodiment of the present invention, when the distribution transformer reactive compensation operating state indicates that there is no switchable distribution transformer reactive compensator in the distribution transformer equipment, it can be preliminarily determined that the cause of the voltage over-limit fault is not the distribution transformer reactive compensator, and fault detection can be performed on the operating data of the distribution transformer equipment to further narrow the fault detection scope.

[0082] According to an embodiment of the present invention, when there is an adjustable distribution transformer voltage operating gear in the distribution transformer equipment, it is determined that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operating gear. The distribution transformer voltage operating gear may include the voltage operating gear of the distribution transformer. The abnormal adjustment of the distribution transformer operating gear may indicate that the cause of the voltage over-limit fault is that the adjustment method of the distribution transformer voltage operating gear is unreasonable.

[0083] In one example, if the bus voltage is above the upper limit, the user voltage is below the lower limit, the substation voltage is below the lower limit, the distribution transformer has an adjustable distribution transformer voltage operating gear, and the distribution transformer does not have a switchable distribution transformer reactive power compensator, it can be determined that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operating gear. The troubleshooting strategy is to adjust the distribution transformer voltage operating gear upward.

[0084] In one example, if the bus voltage is within the limit or the bus voltage is below the lower limit, the user voltage is above the upper limit, the substation voltage is above the upper limit, the distribution transformer has an adjustable distribution transformer voltage operating gear, and the distribution transformer has no switchable distribution transformer reactive power compensator, it can be determined that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operating gear. The troubleshooting strategy is to adjust the distribution transformer voltage operating gear downward.

[0085] In one example, if the bus voltage does not exceed the limit or the bus voltage exceeds the lower limit, the user voltage exceeds the upper limit, the substation voltage exceeds the upper limit, the distribution transformer does not have an adjustable distribution transformer voltage operating gear, and the distribution transformer does not have a switchable distribution transformer reactive power compensator, it can be determined that the first type of equipment abnormality factor is that the bus power supply radius is too long. The transformation measure can be determined to be to transform the bus line to shorten the bus power supply radius.

[0086] In one example, the bus voltage is higher than the upper limit, the user voltage is lower than the lower limit, the substation voltage is lower than the lower limit, the distribution transformer does not have an adjustable distribution transformer voltage operating gear, and the distribution transformer does not have a switchable distribution transformer reactive power compensator. It can be determined that the first type of equipment abnormality factor is the bus charging power is too high. The transformation measures can be determined to be load shedding for the bus, or to install an inductive reactive power compensation device at the outlet of the distribution transformer.

[0087] According to an embodiment of the present invention, in response to the busbar judgment result indicating that the voltage over-limit direction is the same, fault detection is performed based on the main transformer operation data of the main transformer device, and the abnormal factors of the second type of equipment may include:

[0088] Detect the power factor over-limit direction of the main transformer high-voltage side power factor of the main transformer equipment; when the power factor over-limit direction is different from the user voltage over-limit direction, determine the second type of equipment abnormality factor based on the following first type operation.

[0089] According to an embodiment of the present invention, the first type of operation includes: judging whether there is an adjustable main transformer voltage operating gear in the main transformer device, and obtaining a judgment result of the main transformer adjustable gear; when the judgment result of the main transformer adjustable gear indicates that there is an adjustable main transformer voltage operating gear in the main transformer device, determining that the cause of the voltage over-limit fault is abnormal adjustment of the main transformer operating gear; when the judgment result of the main transformer adjustable gear indicates that there is no adjustable main transformer voltage operating gear in the main transformer device, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is over-limited, determining that the cause of the voltage over-limit fault is abnormal power system operation strategy; when the judgment result of the main transformer adjustable gear indicates that there is no adjustable main transformer voltage operating gear in the main transformer device, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is not over-limited, determining the fault factor of the main transformer reactive compensator based on the operation data of the main transformer reactive compensator of the main transformer device.

[0090] According to an embodiment of the present invention, the main transformer device may include a main transformer, or may further include other electrical devices electrically connected to the main transformer device. The main transformer high-voltage side power factor may be determined based on the high-voltage side voltage of the main transformer. For example, the main transformer high-voltage side power factor may be determined based on the ratio between the reactive voltage and the active voltage on the high-voltage side.

[0091] According to an embodiment of the present invention, the abnormal adjustment of the operating gear of the main transformer may indicate a gear adjustment device failure of the main transformer device or an abnormal automatic voltage control (AVC) strategy.

[0092] According to an embodiment of the present invention, the abnormal operation strategy of the power system may indicate abnormal operation strategies such as the adjustment mode of the power system, the configuration parameters of the power equipment, etc. The operation strategy of the power system may be checked by querying the system operation alarm information, the system operation index curve, etc.

[0093] According to an embodiment of the present invention, the operation data of the main transformer reactive compensator may include the number of switchable capacitors of the main transformer reactive compensator, the reactive compensation voltage value, etc. The embodiment of the present invention does not limit the specific operation data type of the operation data of the main transformer reactive compensator. The main transformer reactive compensator fault factor characterizes the cause of the voltage over-limit fault, including the operation abnormality of the main transformer reactive compensator. For example, it can characterize the operation configuration parameter defects of the main transformer reactive compensator, etc.

[0094] According to an embodiment of the present invention, determining the fault factor of the main transformer reactive compensator based on the operating data of the main transformer reactive compensator of the main transformer equipment includes: determining the operating state of the main transformer reactive compensation based on the operating data of the main transformer reactive compensator of the main transformer equipment; determining that the cause of the voltage over-limit fault is a capacitive reactive configuration defect or an inductive reactive configuration defect in the main transformer reactive compensator when the operating state of the main transformer reactive compensation indicates that there is a main transformer reactive compensator that can be switched in the main transformer equipment, and determining that the cause of the voltage over-limit fault is a main transformer reactive compensator fault when the operating state of the main transformer reactive compensation indicates that there is a main transformer reactive compensator that can be switched in the main transformer equipment.

[0095] According to an embodiment of the present invention, the capacitive reactive configuration defect of the main transformer reactive compensator may include insufficient capacitive reactive voltage configuration or excessive capacitive reactive voltage configuration. The inductive reactive configuration defect of the main transformer reactive compensator may include insufficient inductive reactive voltage configuration or excessive inductive reactive voltage configuration.

[0096] In one example, when the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is not over-limited, the user voltage exceeds the upper limit, and the main transformer equipment does not have an adjustable main transformer voltage operating gear, based on the operating data of the main transformer reactive compensator, there is no main transformer reactive compensator that can be switched, and it is determined that the fault factor of the main transformer reactive compensator is insufficient inductive reactive voltage configuration or excessive capacitive reactive voltage configuration. The voltage over-limit fault can be solved by increasing the inductive reactive configuration of the main transformer.

[0097] In one example, when the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is not over-limited, the user voltage is under-limited, and there is no adjustable main transformer voltage operating gear for the main transformer equipment, based on the operating data of the main transformer reactive compensator, there is no main transformer reactive compensator that can be switched, and it is determined that the fault factor of the main transformer reactive compensator is insufficient capacitive reactive voltage configuration. The voltage over-limit fault can be solved by increasing the capacitive reactive configuration of the main transformer.

[0098] In one example, when the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer does not exceed the limit, the user voltage exceeds the lower limit or the user voltage exceeds the upper limit, and the main transformer device does not have an adjustable main transformer voltage operating gear, based on the operating data of the main transformer reactive compensator, there is a switchable main transformer reactive compensator, and it is determined that the main transformer reactive compensator fault factor is a main transformer reactive compensator fault or other main transformer secondary equipment fault, or it can be determined that the main transformer reactive compensator fault factor is a configuration defect in the AVC strategy. The voltage over-limit fault can be resolved by correcting the main transformer reactive compensator defect or modifying the AVC strategy.

[0099] According to an embodiment of the present invention, fault detection is performed based on the main transformer operation data of the main transformer device, and obtaining the abnormal factors of the second type of equipment also includes: when the power factor over-limit direction is the same as the user voltage over-limit direction, determining the abnormal factors of the second type of equipment based on the following second type operations.

[0100] According to an embodiment of the present invention, the second type of operation may include: when the power factor over-limit direction is the same as the user voltage over-limit direction, based on the operating data of the main transformer reactive compensator of the main transformer equipment, determining the main transformer reactive compensation operating state; when the main transformer reactive compensation operating state indicates that there is no main transformer reactive compensator that can be switched in the main transformer equipment, judging whether there is an adjustable main transformer voltage operating gear in the main transformer equipment, and obtaining a main transformer adjustable gear judgment result; when the main transformer adjustable gear judgment result indicates that there is an adjustable main transformer voltage operating gear in the main transformer equipment, determining that the cause of the voltage over-limit fault is abnormal adjustment of the main transformer operating gear; and when the main transformer adjustable gear judgment result indicates that there is no adjustable main transformer voltage operating gear in the main transformer equipment, determining that the cause of the voltage over-limit fault is a capacitive reactive configuration defect or an inductive reactive configuration defect in the main transformer reactive compensator.

[0101] According to an embodiment of the present invention, the abnormal adjustment of the operating gear of the main transformer may indicate a fault in the voltage gear adjustment device of the main transformer, or may also indicate that the AVC strategy configuration of the power system is unreasonable. The strategy for eliminating the voltage over-limit fault may be to check the device fault of the gear adjustment device of the main transformer, or to re-modify the AVC strategy that needs to be configured.

[0102] According to an embodiment of the present invention, the capacitive reactive configuration defect of the main transformer reactive compensator may include insufficient capacitive reactive voltage configuration or excessive capacitive reactive voltage configuration. The inductive reactive configuration defect of the main transformer reactive compensator may include insufficient inductive reactive voltage configuration or excessive inductive reactive voltage configuration.

[0103] In one example, when the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is over the upper limit, the user voltage is over the upper limit, and the main transformer equipment does not have an adjustable main transformer voltage operating gear, based on the operating data of the main transformer reactive compensator, there is no main transformer reactive compensator that can be switched, and the main transformer reactive compensator fault factor is determined to be insufficient inductive reactive voltage configuration or excessive capacitive reactive voltage configuration. The voltage over-limit fault can be solved by increasing the inductive reactive configuration of the main transformer.

[0104] In one example, when the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is under the lower limit, the user voltage is under the lower limit, and the main transformer equipment does not have an adjustable main transformer voltage operating gear, based on the operating data of the main transformer reactive compensator, there is no main transformer reactive compensator that can be switched, and it is determined that the fault factor of the main transformer reactive compensator is insufficient capacitive reactive voltage configuration. The voltage over-limit fault can be solved by increasing the capacitive reactive configuration of the main transformer.

[0105] In one embodiment, when the user voltage and the substation power supply voltage (or distribution transformer power supply voltage) have the same over-limit direction, the voltage over-limit fault of the power system can be detected based on scenarios 1 to 28 as recorded in Tables 3.1 to 3.10 below to obtain the cause of the voltage over-limit fault.

[0106] Table 3.1

[0107]

[0108] Table 3.2

[0109]

[0110] Table 3.3

[0111]

[0112] Table 3.4

[0113]

[0114] Table 3.5

[0115]

[0116] Table 3.6

[0117]

[0118] Table 3.7

[0119]

[0120] Table 3.8

[0121]

[0122] Table 3.9

[0123]

[0124] Table 3.10

[0125]

[0126] Figure 3A and Figure 3B A flow chart of a voltage over-limit fault processing method provided according to another embodiment of the present invention is shown.

[0127] Combination Figure 3A and Figure 3B As shown, the voltage over-limit fault processing method may include operations S301 to S326.

[0128] In operation S301, a user voltage exceeding the limit is detected. If the user voltage exceeds the limit, operation S302 is performed.

[0129] In operation S302, it is determined whether the power supply voltage of the substation exceeds the limit. If the result of the determination in operation S302 is yes, operation S303 is performed to determine whether the direction in which the power supply voltage of the substation exceeds the limit is the same as the direction in which the voltage of the user exceeds the limit. If the results of the determinations in operation S302 and operation S303 are both no, operation S304 is performed to determine whether the power supply line of the substation is abnormal.

[0130] For example, when both the substation power supply voltage and the user voltage exceed the lower limit, it can be determined that the substation power supply line between the distribution transformer and the user end is too long. The power supply radius between the substation and the user end can be shortened by cutting or modifying the line or renovating the substation power supply line.

[0131] For example, when both the substation power supply voltage and the user voltage exceed the upper limit, it can be determined that the charging power of the substation power supply line between the distribution transformer and the user end is too high. The charging power can be reduced by load shedding or installing an inductive reactive device at the outlet of the distribution transformer.

[0132] If the result of operation S303 is yes, operation S305 is performed to determine whether the bus voltage exceeds the limit. If the result of operation S305 is no, operation S306 is performed to determine whether the distribution transformer equipment has a switchable distribution transformer reactive compensator.

[0133] If the result of operation S306 is yes, operation S307 is performed to determine that the distribution transformer reactive compensator is abnormal. For example, when the user voltage and the area power supply voltage are both below the lower limit, the voltage over-limit fault is caused by the capacitor of the distribution transformer reactive compensator not being able to be put in, and when the user voltage and the area power supply voltage are both above the upper limit, the voltage over-limit fault is caused by the capacitor of the distribution transformer reactive compensator not being able to be cut out. The capacitor defect can be determined by checking the distribution transformer capacitor and the secondary equipment related to the distribution transformer equipment, or the fault can be eliminated by modifying the switching strategy.

[0134] If the result of the determination in operation S306 is no, operation S308 is performed to determine whether the distribution transformer has an adjustable voltage level.

[0135] If the result of operation S308 is negative, operation S310 may be performed to determine that the voltage over-limit fault is caused by an abnormal bus power supply line. For example, if the user voltage is below the lower limit and the bus voltage is within the limit, the voltage over-limit fault is caused by the bus power supply radius being too long. If the user voltage is above the upper limit and the bus voltage is within the limit, the voltage over-limit fault is caused by the bus charging power being too high.

[0136] If the result of the determination in operation S308 is yes, operation S309 may be performed to determine that the cause of the voltage over-limit fault is unreasonable voltage gear adjustment of the distribution transformer.

[0137] If the result of operation S305 is yes, operation S311 is performed to determine whether the bus voltage over-limit direction is consistent with the user voltage over-limit direction. If the result of operation S311 is no, operation S306 is performed. If the result of operation S311 is yes, operation S312 is performed to determine whether the power factor on the high-voltage side of the main transformer is over-limit.

[0138] If the result of operation S312 is no, operation S313 is performed to determine whether the main transformer has an adjustable voltage level. If the result of operation S313 is yes, operation S314 is performed to determine whether the voltage over-limit fault is caused by an abnormal voltage device of the main transformer or an abnormal AVC strategy.

[0139] If the result of operation S313 is no, operation S315 is performed to determine whether the main transformer device has a switchable main transformer reactive compensator. If the result of operation S315 is no, operation S316 is performed to determine that the cause of the voltage over-limit fault is abnormal capacitive reactive configuration or abnormal inductive reactive configuration of the main transformer reactive compensator. If the result of operation S315 is yes, operation S317 is performed to determine that the cause of the voltage over-limit fault is a defect in the main transformer reactive compensation or an abnormal AVC strategy.

[0140] If the result of the determination in operation S312 is yes, operation S318 is performed to determine whether the power factor over-limit direction of the power factor on the high-voltage side of the main transformer is the same as the user voltage over-limit direction.

[0141] If the result of operation S318 is no, operation S319 is performed to determine whether the main transformer has an adjustable voltage gear. If the result of operation S319 is no, operation S320 is performed to determine that the cause of the voltage over-limit fault is an abnormality in the power system operation strategy. If the result of operation S319 is yes, operation S321 is performed to determine that the cause of the voltage over-limit fault is an abnormality in the voltage gear adjustment device of the main transformer.

[0142] If the result of operation S318 is yes, operation S322 is performed to determine whether the main transformer equipment has a switchable main transformer reactive power compensator. If the result of operation S322 is yes, the cause of the voltage over-limit fault is determined to be a main transformer reactive power compensation defect or an abnormal AVC strategy.

[0143] If the result of operation S322 is no, operation S324 is performed to determine whether the main transformer device has an adjustable voltage gear. If the result of operation S324 is no, operation S325 is performed to determine that the cause of the voltage over-limit fault is an abnormal configuration of the main transformer reactive power compensation device. If the result of operation S324 is yes, operation S326 is performed to determine that the cause of the voltage over-limit fault is an abnormality in the voltage gear adjustment device of the main transformer device or an abnormality in the AVC strategy.

[0144] If the result of the determination in operation S322 is yes, operation S323 is performed to determine that the cause of the voltage over-limit fault is a defect in the reactive power compensation of the main transformer or an abnormality in the AVC strategy.

[0145] The voltage over-limit fault processing method provided by the present invention will be described below in combination with Example 1 and Example 2.

[0146] Example 1

[0147] Taking user A as an example (meeting scenario 3 of the same-direction over-limit in Table 1), user A exceeded the limit for more than 10,000 minutes in August. The number of user terminals whose voltage exceeded the limit in the substation was 225, and the maximum user voltage was 236.1V. The maximum user voltage time was: 2022-08-31 02:00:00. The duration of the user voltage exceeding the upper limit: 360 minutes. First, the substation power supply voltage was 235.3V at the time of the user voltage maximum, which was within the limit. According to the reverse over-limit tracing principle (refer to Table 1), it is judged that the charging power generated by the high-voltage cable rate in the low-voltage substation power supply line is too high, and it is recommended to perform load shedding to eliminate the voltage over-limit fault.

[0148] Example 2

[0149] Taking user B as an example (meeting the same-direction over-limit scenario 17), the cumulative over-limit of user B in August was more than 10,000 minutes. The number of user terminals in the substation where the voltage exceeded the limit was 329, the user voltage maximum was 241.8V, the user voltage maximum time was: 2022-08-17 04:00:00, and the user voltage exceeded the upper limit for 360 minutes. First, the substation power supply voltage was 241V at the time of the user voltage maximum. According to the principle of tracing back to the upper level when the user voltage exceeded the limit in the same direction, the voltage value on the low-voltage side of the main transformer equipment was 10.33kV at the time of the user voltage maximum, which was not over-limited. The distribution transformer reactive compensators were all cut out, and the distribution transformer voltage adjustment gear was in gear 3. The voltage over-limit fault can be solved by adjusting the gear downward.

[0150] Figure 4 A schematic diagram of an interactive interface provided according to an embodiment of the present invention is shown.

[0151] like Figure 4 As shown, the interactive interface 400 may be an interactive interface of a system for executing the voltage over-limit fault processing method provided in the embodiment of the present invention. The interactive interface 400 may display various operation data of the user end of the power system, the operation data of the distribution transformer equipment in the substation area, the operation data of the low-voltage reactive compensator (distribution transformer reactive compensator), the power supply line parameters, the main transformer operation data and the main transformer reactive compensator operation data. The method provided in the embodiment of the present invention can be executed through the detected power system operation data, and the cause of the voltage fault can be displayed in the interactive interface 400 to facilitate the rapid location of the cause of the voltage over-limit fault.

[0152] According to the method provided by the embodiment of the present invention, the causes of voltage over-limit faults of the same user that are mutually exclusive at different times and the same user that are over-limit in different directions at different times of the year can be analyzed. The mutual exclusion of over-limit at different times of the same user usually refers to over-limit in different directions for the same user at different times of the year. When over-limit in different directions occurs at different times of the same user in a year, it generally changes with seasonal load changes and presents seasonal load characteristics, such as coal-to-electricity distribution and transformation areas, and large residential areas with air conditioning and electric heating as the main load changes.

[0153] The tracing process of seasonal load voltage over-limit still needs to adhere to the principle of tracing the source of voltage problems from bottom to top, that is, find the superior for over-limit in the same direction and find the same level for over-limit in the opposite direction. However, it is worth noting that the operation and maintenance strategy when seasonal load users have voltage over-limit is different from the operation and maintenance strategy when only a single over-limit user is presented. It is necessary to comprehensively consider the load changes throughout the year, with active management mode as the main mode and passive management mode as the auxiliary mode.

[0154] The active management mode refers to the precise control of bus voltage zones in advance through large-scale data analysis combined with historical curves. Before the voltage regulation curve for this year is issued, the dispatching department is guided to optimize the voltage regulation curve to minimize the voltage change in the substation throughout the year. The passive management mode refers to the use of reactive power cutting and gear adjustment at this level for a small number of over-limit substations to carry out precise problem management.

[0155] Take a certain power supply area as an example. This area is a newly renovated large-scale coal-to-electricity substation concentration area, with a total of 388 substations. The load shows a phenomenon of exceeding the upper limit in the summer and exceeding the lower limit in the winter heating period. According to the voltage curve uniformly issued by the dispatcher, the bus voltage is generally increased to 10.5-10.6kV during the summer, resulting in the voltage of the 18 substations at the end not exceeding the limit, but the other 370 substations exceed the upper limit in large numbers. The relationship between the bus voltage curve and the substation voltage value during the summer of the past three years was obtained, and it was inferred that when the voltage qualification rate of the substations in the area is the highest, the bus voltage should be controlled at 10.1-10.2kV. Before the arrival of summer, the dispatching department was instructed to set a personalized bus curve for the station, and the substation gear adjustment was carried out during the summer. The comprehensive voltage qualification rate increased by 8% from July to September.

[0156] According to the method provided in the embodiment of the present invention, the voltage over-limit direction at different locations between the substation, high-voltage line, distribution transformer and user can be used to analyze the cause of the voltage over-limit fault and improve the accuracy of fault detection.

[0157] In one example, the users in the substation can be new energy power supply users who have set up new energy power generation devices such as photovoltaic power generation devices. The voltage over-limit fault tracing of new energy power supply users is different from that of ordinary users. New energy power supply users are both electricity users and power generation users. The voltage over-limit problem tracing is mainly concentrated on the substation power distribution equipment side. New energy power supply users are equipped with inverters before entering the network. When the voltage over-limit situation occurs, the low-voltage side voltage value of the substation power distribution equipment, the operation data of the substation reactive power compensator, and the voltage value output by the inverter should be comprehensively judged. The first step is to determine whether the output voltage value of the inverter meets the voltage limit requirements (for example, the output voltage deviation does not exceed the nominal voltage ±7%). If the voltage limit requirements are not met, the smart grid-connected switch of the new energy power supply user needs to be cut off to avoid the new energy output exceeding the load power demand of the substation and causing the substation power flow to flow in reverse. If the output voltage value of the inverter meets the voltage limit requirements, the fault cause of the voltage over-limit of each user in the substation can be determined based on the method provided in the embodiment of the present invention.

[0158] Figure 5 A block diagram of a voltage over-limit fault processing device according to an embodiment of the present invention is shown.

[0159] like Figure 5 As shown, the voltage over-limit fault processing device 500 includes an acquisition module 510, a substation judgment result acquisition module 520, a substation power supply line abnormal factor determination module 530 and an equipment abnormal factor acquisition module 540.

[0160] The acquisition module 510 is used to acquire the substation voltage in the power system and the user voltage of at least one user terminal in the substation.

[0161] The substation judgment result obtaining module 520 is used to determine whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage based on the substation voltage over-limit attribute of the substation voltage when the user voltage represents a voltage over-limit fault of the power system, and obtain the substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage.

[0162] The substation power supply line abnormality factor determination module 530 is used to determine the substation power supply line abnormality factor in response to the substation judgment result indicating that the voltage exceeds the limit in different directions, based on the substation voltage exceeding the limit attribute, and the substation power supply line abnormality factor indicates that the cause of the voltage exceeding the limit fault is the abnormality of the substation power supply line between the substation and the user end.

[0163] The equipment abnormality factor acquisition module 540 is used to respond to the substation judgment result indicating that the voltage is over-limit in the same direction, perform fault detection based on the equipment operation data related to the main transformer equipment in the power system, and obtain the equipment abnormality factor. The equipment abnormality factor indicates that the cause of the voltage over-limit fault is the abnormal operation of the main transformer equipment or the equipment electrically connected to the main transformer equipment.

[0164] According to an embodiment of the present invention, the abnormal factor determination module 530 for the power supply line in the substation includes: a first abnormal factor determination submodule and a second abnormal factor determination submodule.

[0165] The first abnormal factor determination submodule is used to determine the first abnormal factor when the substation voltage over-limit attribute represents that the substation voltage exceeds the upper limit, or the substation voltage over-limit attribute represents that the substation voltage does not exceed the limit, and the voltage over-limit direction of the user voltage represents that the user voltage exceeds the lower limit, and the first abnormal factor represents that the line length of the substation power supply line is abnormal.

[0166] The second abnormal factor determination submodule is used to determine the second abnormal factor when the substation voltage over-limit attribute indicates that the substation voltage exceeds the lower limit, or the substation voltage over-limit attribute indicates that the substation voltage does not exceed the limit, and the voltage over-limit direction of the user voltage indicates that the user voltage exceeds the upper limit, and the second abnormal factor indicates that the line charging power of the substation power supply line is abnormal.

[0167] According to an embodiment of the present invention, the voltage over-limit fault processing device 500 further includes: a first type of fault elimination strategy determination module and a second type of fault elimination strategy determination module.

[0168] The first type of fault elimination strategy determination module is used to determine the first type of fault elimination strategy in response to the first abnormal factor. The first type of fault elimination strategy represents shortening the line length of the power supply line in the substation.

[0169] The second type of fault elimination strategy determination module is used to determine the second type of fault elimination strategy in response to the second abnormal factor, and the second type of fault elimination strategy represents reducing the line charging power of the power supply line in the substation area.

[0170] According to the embodiment of the present invention, the device abnormality factor obtaining module 540 includes: a first judgment submodule, a first type of device abnormality factor obtaining submodule and a second type of device abnormality factor obtaining submodule.

[0171] The first judgment submodule is used to judge whether the bus voltage over-limit direction of the bus voltage is the same as the user voltage over-limit direction, and obtain the bus judgment result. The bus voltage is the equipment operation data of the bus related to the main transformer equipment, and the user voltage over-limit direction is the voltage over-limit direction of the user voltage.

[0172] The first type of equipment abnormality factor acquisition submodule is used to respond to the bus judgment result characterizing different voltage over-limit directions, perform fault detection based on the distribution transformer operation data of the distribution transformer in the substation, and obtain the first type of equipment abnormality factor, wherein the distribution transformer is electrically connected to the main transformer equipment, and the first type of equipment abnormality factor characterizes the cause of the voltage over-limit fault as: abnormal bus operation or abnormal distribution transformer operation.

[0173] The second type of equipment abnormality factor obtaining submodule is used to respond to the bus judgment result indicating that the voltage is over-limit in the same direction, perform fault detection based on the main transformer operation data of the main transformer equipment, and obtain the second type of equipment abnormality factor. The second type of equipment abnormality factor indicates that the cause of the voltage over-limit fault is the abnormal operation of the main transformer equipment.

[0174] According to an embodiment of the present invention, the first type of equipment abnormal factor obtaining submodule includes: a distribution transformer reactive power compensation operation state determining unit, a first determining unit, a first judging unit, and a second determining unit.

[0175] The distribution transformer reactive power compensation operation state determining unit is used to determine the distribution transformer reactive power compensation operation state based on the operation data of the distribution transformer reactive power compensator of the distribution transformer equipment.

[0176] The first determination unit is used to determine that the cause of the voltage over-limit fault is abnormal operation of the distribution transformer reactive compensator when the distribution transformer reactive compensation operation state indicates that there is a switchable distribution transformer reactive compensator in the distribution transformer equipment.

[0177] The first judgment unit is used to judge whether the distribution transformer device has an adjustable distribution transformer voltage operation gear when the distribution transformer reactive compensation operation state indicates that the distribution transformer device does not have a switchable distribution transformer reactive compensator.

[0178] The second determination unit is used to determine that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operating gear when the distribution transformer equipment has an adjustable distribution transformer voltage operating gear.

[0179] According to an embodiment of the present invention, the second-category equipment abnormality factor obtaining submodule includes: a first detection unit and a third determination unit.

[0180] The first detection unit is used to detect the power factor over-limit direction of the power factor on the high-voltage side of the main transformer of the main transformer equipment.

[0181] The third determination unit is used to determine the second type of equipment abnormality factor based on the following first type of operations when the power factor over-limit direction is different from the user voltage over-limit direction: determine whether the main transformer equipment has an adjustable main transformer voltage operating gear, and obtain the main transformer adjustable gear judgment result; when the main transformer adjustable gear judgment result indicates that the main transformer equipment has an adjustable main transformer voltage operating gear, determine that the cause of the voltage over-limit fault is the abnormal adjustment of the main transformer operating gear; when the main transformer adjustable gear judgment result indicates that the main transformer equipment does not have an adjustable main transformer voltage operating gear, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is over-limited, determine that the cause of the voltage over-limit fault is an abnormal power system operation strategy; when the main transformer adjustable gear judgment result indicates that the main transformer equipment does not have an adjustable main transformer voltage operating gear, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is not over-limited, determine the main transformer reactive compensator fault factor based on the operation data of the main transformer reactive compensator of the main transformer equipment, and the main transformer reactive compensator fault factor indicates that the cause of the voltage over-limit fault includes the operation abnormality of the main transformer reactive compensator.

[0182] According to an embodiment of the present invention, determining the fault factor of the main transformer reactive compensator based on the operating data of the main transformer reactive compensator of the main transformer equipment includes: determining the operating state of the main transformer reactive compensation based on the operating data of the main transformer reactive compensator of the main transformer equipment; determining that the cause of the voltage over-limit fault is a capacitive reactive configuration defect or an inductive reactive configuration defect in the main transformer reactive compensator when the operating state of the main transformer reactive compensation indicates that there is a main transformer reactive compensator that can be switched in the main transformer equipment, and determining that the cause of the voltage over-limit fault is a main transformer reactive compensator fault when the operating state of the main transformer reactive compensation indicates that there is a main transformer reactive compensator that can be switched in the main transformer equipment.

[0183] According to an embodiment of the present invention, the second-category equipment abnormality factor obtaining submodule further includes a fourth determining unit.

[0184] The fourth determination unit is used to determine the abnormal factors of the second type of equipment based on the following second type of operations when the power factor over-limit direction is the same as the user voltage over-limit direction: determining the main transformer reactive compensation operation state based on the operation data of the main transformer reactive compensator of the main transformer equipment; when the main transformer reactive compensation operation state indicates that there is no main transformer reactive compensator that can be switched in the main transformer equipment, judging whether there is an adjustable main transformer voltage operation gear in the main transformer equipment, and obtaining the main transformer adjustable gear judgment result; when the main transformer adjustable gear judgment result indicates that there is an adjustable main transformer voltage operation gear in the main transformer equipment, determining that the cause of the voltage over-limit fault is abnormal adjustment of the main transformer operation gear; and when the main transformer adjustable gear judgment result indicates that there is no adjustable main transformer voltage operation gear in the main transformer equipment, determining that the cause of the voltage over-limit fault is a capacitive reactive configuration defect or an inductive reactive configuration defect in the main transformer reactive compensator.

[0185] According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits, or at least part of the functions of any one of them can be implemented in one module. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be split into multiple modules for implementation. According to the embodiments of the present invention, any one or more of the modules, submodules, units, and subunits can be at least partially implemented as hardware circuits, such as field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), systems on chips, systems on substrates, systems on packages, application specific integrated circuits (ASICs), or can be implemented by hardware or firmware in any other reasonable way of integrating or packaging the circuit, or by any one of the three implementation methods of software, hardware, and firmware, or by a proper combination of any of them. Alternatively, according to the embodiments of the present invention, one or more of the modules, submodules, units, and subunits can be at least partially implemented as computer program modules, and when the computer program modules are run, the corresponding functions can be executed.

[0186] It should be noted that the voltage over-limit fault processing method part in the embodiment of the present invention corresponds to the voltage over-limit fault processing device part in the embodiment of the present invention. The description of the voltage over-limit fault processing device part specifically refers to the voltage over-limit fault processing method part, which will not be repeated here.

[0187] Figure 6 A block diagram of an electronic device suitable for implementing a voltage over-limit fault processing method according to an embodiment of the present invention is shown. Figure 6 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0188] like Figure 6As shown, the electronic device 600 according to an embodiment of the present invention includes a processor 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage part 608 to a random access memory (RAM) 603. The processor 601 may include, for example, a general-purpose microprocessor (such as a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (for example, an application-specific integrated circuit (ASIC)), etc. The processor 601 may also include an onboard memory for caching purposes. The processor 601 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0189] In the random access memory (RAM) 603, various programs and data required for the operation of the electronic device 600 are stored. The processor 601, the programs stored in the read-only memory (ROM) 602, and the random access memory (RAM) 603 are connected to each other through the bus 604. The processor 601 performs various operations of the method flow according to the embodiment of the present invention by executing the programs stored in the read-only memory (ROM) 602 and / or the random access memory (RAM) 603. It should be noted that the program can also be stored in one or more memories other than the read-only memory (ROM) 602 and the random access memory (RAM) 603. The processor 601 can also perform various operations of the method flow according to the embodiment of the present invention by executing the programs stored in the one or more memories.

[0190] According to an embodiment of the present invention, the electronic device 600 may further include an input / output (I / O) interface 605, which is also connected to the bus 604. The electronic device 600 may further include one or more of the following components connected to the input / output (I / O) interface 605: an input portion 606 including a keyboard, a mouse, etc.; an output portion 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 608 including a hard disk, etc.; and a communication portion 609 including a network interface card such as a LAN card, a modem, etc. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the input / output (I / O) interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed, so that a computer program read therefrom is installed into the storage portion 608 as needed.

[0191] According to an embodiment of the present invention, the method flow according to an embodiment of the present invention can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 609, and / or installed from the removable medium 611. When the computer program is executed by the processor 601, the above-mentioned functions defined in the system of the embodiment of the present invention are executed. According to an embodiment of the present invention, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0192] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiment; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0193] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, 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, an apparatus or a device.

[0194] For example, according to an embodiment of the present invention, the computer-readable storage medium may include the one or more memories stored in the read-only memory (ROM) 602 and / or the random access memory (RAM) 603 described above and / or stored outside the read-only memory (ROM) 602 and the random access memory (RAM) 603.

[0195] An embodiment of the present invention also includes a computer program product, which includes a computer program, which contains program code for executing the method provided by the embodiment of the present invention. When the computer program product runs on an electronic device, the program code is used to enable the electronic device to implement the voltage over-limit fault processing method provided by the embodiment of the present invention.

[0196] When the computer program is executed by the processor 601, the above functions defined in the system / device of the embodiment of the present invention are executed. According to the embodiment of the present invention, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0197] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 609, and / or installed from a removable medium 611. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0198] According to an embodiment of the present invention, the program code for executing the computer program provided by the embodiment of the present invention can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0199] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments of the present invention can be combined and / or combined in various ways, even if such a combination or combination is not explicitly recorded in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recorded in the various embodiments of the present invention can be combined and / or combined in various ways. All these combinations and / or combinations fall within the scope of the present invention.

[0200] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination advantageously. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A method for handling voltage over-limit faults, characterized in that: include: Acquire a substation voltage in a substation in a power system and a user voltage of at least one user terminal in the substation; In the case where the user voltage represents a voltage over-limit fault of the power system, judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and obtaining a substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage; In response to the substation judgment result indicating that the voltage over-limit direction is different, based on the substation voltage over-limit attribute, determining the substation power supply line abnormality factor, the substation power supply line abnormality factor indicating that the cause of the voltage over-limit fault is the substation power supply line between the substation and the user end is abnormal; In response to the substation judgment result indicating that the voltage over-limit direction is the same, fault detection is performed based on the equipment operation data related to the main transformer equipment in the power system to obtain equipment abnormality factors, wherein the equipment abnormality factors indicate that the cause of the voltage over-limit fault is abnormal operation of the main transformer equipment or equipment electrically connected to the main transformer equipment; Wherein, based on the voltage over-limit attribute of the substation, determining the abnormal factors of the power supply line in the substation includes: When the over-limit attribute of the substation voltage indicates that the substation voltage exceeds the lower limit, or the over-limit attribute of the substation voltage indicates that the substation voltage does not exceed the limit, and the over-limit direction of the user voltage indicates that the user voltage exceeds the upper limit, a second abnormal factor is determined, and the second abnormal factor indicates that the line charging power of the substation power supply line is abnormal; The method further comprises: In response to the second abnormal factor, a second type of fault elimination strategy is determined, wherein the second type of fault elimination strategy is characterized by reducing the line charging power of the power supply line of the substation, and the second type of fault elimination strategy includes modifying the configuration power supply mode of the power supply topology of the substation.

2. The voltage over-limit fault processing method according to claim 1 is characterized in that: Based on the voltage over-limit attribute of the substation, the abnormal factors of the power supply line in the substation are determined to include: When the substation voltage over-limit attribute represents that the substation voltage exceeds the upper limit, or the substation voltage over-limit attribute represents that the substation voltage does not exceed the limit, and the voltage over-limit direction of the user voltage represents that the user voltage exceeds the lower limit, a first abnormal factor is determined, and the first abnormal factor represents that the line length of the substation power supply line is abnormal.

3. The voltage over-limit fault processing method according to claim 2 is characterized in that: The method further comprises: In response to the first abnormal factor, a first type of fault elimination strategy is determined, wherein the first type of fault elimination strategy is characterized by shortening the line length of the substation power supply line.

4. The voltage over-limit fault processing method according to claim 1, characterized in that: Fault detection is performed based on the equipment operation data related to the main transformer equipment in the power system, and the equipment abnormality factors include: Determine whether the bus voltage over-limit direction of the bus voltage is the same as the user voltage over-limit direction, and obtain a bus judgment result, wherein the bus voltage is equipment operation data of the bus related to the main transformer device, and the user voltage over-limit direction is the voltage over-limit direction of the user voltage; In response to the busbar judgment result indicating that the voltage over-limit direction is different, fault detection is performed based on the distribution transformer operation data of the distribution transformer equipment in the substation to obtain a first type of equipment abnormality factor, wherein the distribution transformer equipment is electrically connected to the main transformer equipment, and the first type of equipment abnormality factor indicates that the cause of the voltage over-limit fault is: the busbar operation is abnormal or the distribution transformer equipment is abnormal; In response to the busbar judgment result indicating that the voltage over-limit direction is the same, fault detection is performed based on the main transformer operation data of the main transformer device to obtain a second type of equipment abnormality factor, which indicates that the cause of the voltage over-limit fault is abnormal operation of the main transformer device.

5. The voltage over-limit fault processing method according to claim 4 is characterized in that: Fault detection is performed based on the distribution transformer operation data of the distribution transformer equipment in the substation, and the first type of equipment abnormal factors include: Determining the distribution transformer reactive power compensation operation state based on the operation data of the distribution transformer reactive power compensator of the distribution transformer equipment; When the distribution transformer reactive compensation operation state indicates that the distribution transformer equipment has a switchable distribution transformer reactive compensator, determining that the cause of the voltage over-limit fault is abnormal operation of the distribution transformer reactive compensator; When the distribution transformer reactive compensation operation state indicates that the distribution transformer device does not have a switchable distribution transformer reactive compensator, determining whether the distribution transformer device has an adjustable distribution transformer voltage operation gear; In the case that the distribution transformer equipment has an adjustable distribution transformer voltage operating gear, it is determined that the cause of the voltage over-limit fault is abnormal adjustment of the distribution transformer operating gear.

6. The voltage over-limit fault processing method according to claim 4 is characterized in that: Fault detection is performed based on the main transformer operation data of the main transformer equipment, and the second type of equipment abnormal factors include: Detecting the power factor over-limit direction of the power factor on the main transformer high-voltage side of the main transformer device; When the power factor over-limit direction is different from the user voltage over-limit direction, the second-type equipment abnormality factor is determined based on the following first-type operations: Determine whether the main transformer device has an adjustable main transformer voltage operating gear, and obtain a determination result of the main transformer adjustable gear; When the main transformer adjustable gear judgment result indicates that the main transformer device has an adjustable main transformer voltage operating gear, determining that the cause of the voltage over-limit fault is abnormal adjustment of the main transformer operating gear; When the main transformer adjustable gear judgment result indicates that the main transformer device does not have an adjustable main transformer voltage operating gear, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer is over-limited, it is determined that the cause of the voltage over-limit fault is an abnormal power system operation strategy; When the result of the adjustable gear judgment of the main transformer indicates that there is no adjustable main transformer voltage operating gear for the main transformer equipment, and the power factor over-limit direction indicates that the power factor on the high-voltage side of the main transformer does not exceed the limit, the fault factor of the main transformer reactive compensator is determined based on the operating data of the main transformer reactive compensator of the main transformer equipment, and the fault factor of the main transformer reactive compensator indicates that the cause of the voltage over-limit fault includes abnormal operation of the main transformer reactive compensator.

7. The voltage over-limit fault processing method according to claim 6, characterized in that: Based on the operation data of the main transformer reactive power compensator of the main transformer equipment, determining the fault factor of the main transformer reactive power compensator includes: Determining the main transformer reactive power compensation operation state based on the operation data of the main transformer reactive power compensator of the main transformer equipment; When the main transformer reactive compensation operation state indicates that the main transformer equipment does not have a switchable main transformer reactive compensator, determining that the cause of the voltage over-limit fault is that the main transformer reactive compensator has a capacitive reactive configuration defect or an inductive reactive configuration defect; and When the main transformer reactive power compensation operation state indicates that there is a switchable main transformer reactive power compensator in the main transformer equipment, it is determined that the cause of the voltage over-limit fault is a main transformer reactive power compensator fault.

8. The voltage over-limit fault processing method according to claim 6, characterized in that: Fault detection is performed based on the main transformer operation data of the main transformer device, and the second type of equipment abnormality factors also include: When the power factor over-limit direction is the same as the user voltage over-limit direction, the second-category equipment abnormality factor is determined based on the following second-category operations: Determining the main transformer reactive power compensation operation state based on the operation data of the main transformer reactive power compensator of the main transformer equipment; When the main transformer reactive power compensation operation state indicates that the main transformer device does not have a switchable main transformer reactive power compensator, judging whether the main transformer device has an adjustable main transformer voltage operation gear, and obtaining a main transformer adjustable gear judgment result; When the main transformer adjustable gear judgment result indicates that the main transformer device has an adjustable main transformer voltage operating gear, determining that the cause of the voltage over-limit fault is abnormal adjustment of the main transformer operating gear; and When the result of the main transformer adjustable gear judgment indicates that the main transformer device does not have an adjustable main transformer voltage operating gear, it is determined that the cause of the voltage over-limit fault is that the main transformer reactive compensator has a capacitive reactive configuration defect or an inductive reactive configuration defect.

9. A voltage over-limit fault processing device, characterized in that: include: An acquisition module, used for acquiring a substation voltage in a substation in a power system and a user voltage of at least one user terminal in the substation; A substation judgment result obtaining module, used for, when the user voltage represents a voltage over-limit fault of the power system, judging whether the voltage over-limit direction of the substation voltage is the same as the voltage over-limit direction of the user voltage according to the substation voltage over-limit attribute of the substation voltage, and obtaining a substation judgment result, wherein the substation voltage attribute represents the voltage over-limit situation of the substation voltage; A power supply line abnormality factor determination module for an area, for determining an abnormality factor of the power supply line in an area in response to the fact that the voltage over-limit direction is different in the judgment result of the area, based on the voltage over-limit attribute of the area, wherein the abnormality factor of the power supply line in the area indicates that the cause of the voltage over-limit fault is an abnormality of the power supply line in the area between the area and the user end; An equipment abnormality factor obtaining module is used for performing fault detection based on equipment operation data related to the main transformer equipment in the power system in response to the fact that the voltage over-limit direction is the same as the judgment result of the substation area, and obtaining equipment abnormality factors, wherein the equipment abnormality factors indicate that the cause of the voltage over-limit fault is abnormal operation of the main transformer equipment or equipment electrically connected to the main transformer equipment; Among them, the abnormal factor determination module of the power supply line in the substation area includes: A second abnormal factor determination submodule is used to determine a second abnormal factor when the over-limit attribute of the substation voltage indicates that the substation voltage exceeds a lower limit, or the over-limit attribute of the substation voltage indicates that the substation voltage does not exceed the limit, and the voltage over-limit direction of the user voltage indicates that the user voltage exceeds an upper limit, wherein the second abnormal factor indicates that the line charging power of the power supply line of the substation is abnormal; The device also includes: A second type of fault troubleshooting strategy determination module is used to determine a second type of fault troubleshooting strategy in response to the second abnormal factor, wherein the second type of fault troubleshooting strategy is characterized by reducing the line charging power of the power supply line in the substation, and the second type of fault troubleshooting strategy includes configuring and modifying the power supply mode of the power supply topology of the substation.

10. An electronic device, comprising: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the voltage over-limit fault processing method described in any one of claims 1 to 8.

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