Method, device, equipment and medium for detecting three-phase unbalanced fault of starting resistance

Abstract

The present invention discloses a detection method, device, equipment and medium for a three-phase unbalanced fault of a starting resistor, which detects the real-time effective value of each phase current of the three-phase starting resistor of a flexible DC system; calculates the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; and determines that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unevenness coefficient is greater than a pre-calculated unevenness coefficient threshold of the three-phase current. Whether the resistance value of each phase starting resistor is normal is determined by measuring the relative size of the effective value of each phase current on each phase starting resistor, so as to facilitate timely detection of the three-phase unbalanced fault of the starting resistor.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible direct current power transmission, and in particular to a detection method, device, equipment and medium for a three-phase unbalanced fault of a starting resistor. Background Art

[0002] The starting resistor of the flexible DC system is an important device of the flexible DC system. The starting resistor is put into operation when the flexible DC system is started. After the AC circuit breaker is closed, the AC power supply charges the uncontrolled rectifier of the flexible DC converter valve through the starting resistor. After the charging is completed, the bypass isolation switch in parallel with the starting resistor is closed to bypass the starting resistor.

[0003] In order to maintain the starting balance of the three phases of the flexible DC system, the resistance values ​​of the three-phase starting resistors are generally set to be the same. After the AC circuit breaker is closed, the voltage and current on the three-phase starting resistors quickly rise to the maximum value, and then gradually decrease until the uncontrolled charging is completed.

[0004] If the flexible DC system has internal short-circuit defects in the starting resistors of each phase, resulting in a small-scale short-circuit in the insulation weak position of the starting resistor each time it is started, the system can still start normally because the short-circuited resistance is not large; therefore, it is difficult to detect the unbalanced fault of the three-phase starting resistors. After multiple small-scale short-circuits in the starting resistors, the equipment defects will expand and develop into an obvious short circuit, damaging the equipment. Summary of the invention

[0005] The embodiments of the present invention provide a method, device, equipment and medium for detecting a three-phase unbalanced fault of a starting resistor, which can detect the three-phase unbalanced fault of a starting resistor in a timely manner and avoid the expansion of the fault.

[0006] An embodiment of the present invention provides a method for detecting a three-phase unbalanced fault of a starting resistor, comprising:

[0007] Detect the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system;

[0008] Calculating the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current;

[0009] When the dynamic unevenness coefficient is greater than a pre-calculated unevenness coefficient threshold of the three-phase current, it is determined that a three-phase unbalanced fault occurs in the starting resistor.

[0010] As a preferred embodiment, the calculating of the real-time dynamic non-uniformity coefficient of the flexible DC system according to the effective value of each phase current specifically includes:

[0011] The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t);

[0012] Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

[0013] Preferably, the calculation process of the non-uniformity coefficient threshold specifically includes:

[0014] Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system;

[0015] According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ;

[0016] Simulate the maximum peak current I in the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ;

[0017] Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 .

[0018] The embodiment of the present invention also provides a detection device for a three-phase unbalanced fault of a starting resistor, comprising: a current detection module, an uneven coefficient calculation module and a determination module;

[0019] The current detection module is used to detect the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system;

[0020] The uneven coefficient calculation module is used to calculate the real-time dynamic uneven coefficient of the flexible DC system according to the effective value of each phase current;

[0021] The determination module is used to determine that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unbalanced coefficient is greater than a pre-calculated unbalanced coefficient threshold of the three-phase current.

[0022] Preferably, the non-uniformity coefficient calculation module is specifically used for:

[0023] The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t);

[0024] Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

[0025] Preferably, the calculation process of the non-uniformity coefficient threshold specifically includes:

[0026] Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system;

[0027] According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ;

[0028] Simulate the maximum peak current I in the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ;

[0029] Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 .

[0030] An embodiment of the present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a method for detecting a three-phase unbalanced fault of a starting resistor as described in any one of the above embodiments is implemented.

[0031] An embodiment of the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a method for detecting a three-phase unbalanced fault of a starting resistor as described in any one of the above embodiments.

[0032] The present invention provides a detection method, device, equipment and medium for a three-phase unbalanced fault of a starting resistor, which detects the real-time effective value of each phase current of the three-phase starting resistor of a flexible DC system; calculates the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; when the dynamic unevenness coefficient is greater than the pre-calculated unevenness coefficient threshold of the three-phase current, it is determined that a three-phase unbalanced fault occurs in the starting resistor. By measuring the relative size of the effective value of each phase current on each phase starting resistor, it is determined whether the resistance value of each phase starting resistor is normal, so as to detect the three-phase unbalanced fault of the starting resistor in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of a method for detecting a three-phase unbalanced fault of a starting resistor provided by an embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of a detection device for a three-phase unbalanced fault of a starting resistor provided by an embodiment of the present invention;

[0035] Figure 3 It is a structural diagram of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiment of the present invention provides a method for detecting a three-phase unbalanced fault of a starting resistor, see Figure 1 , is a flow chart of a method for detecting a three-phase unbalanced fault of a starting resistor provided by an embodiment of the present invention, comprising steps S101 to S103:

[0038] S101, detecting the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system;

[0039] S102, calculating a real-time dynamic non-uniformity coefficient of the flexible DC system according to the effective value of each phase current;

[0040] S103: When the dynamic unevenness coefficient is greater than a pre-calculated three-phase current unevenness coefficient threshold, it is determined that a three-phase unbalance fault occurs in the starting resistor.

[0041] In the specific implementation of this embodiment, during the startup process of the flexible DC system, the real-time effective value of each phase current of the three-phase starting resistor is detected, specifically, the real-time effective value of each phase current of each phase starting resistor is detected during the startup process of the three-phase starting resistor;

[0042] and calculating the real-time dynamic unevenness coefficient during the startup of the flexible tributary system according to the recorded effective value of each phase current;

[0043] When the dynamic unevenness coefficient is greater than a pre-calculated unevenness coefficient threshold of the three-phase current, it is determined that a three-phase unbalanced fault occurs in the starting resistor.

[0044] By measuring the relative size of the effective value of each phase current on each phase starting resistor, it is possible to determine whether the resistance of each phase starting resistor is normal, and detect abnormal resistance of a certain phase. It is easier to find small abnormalities than judging by the absolute value of current, which is conducive to timely detection of problems.

[0045] The present invention provides a method for detecting a three-phase unbalanced fault of a starting resistor, which detects the real-time effective value of each phase current of the three-phase starting resistor of a flexible DC system; calculates the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; and determines that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unevenness coefficient is greater than a pre-calculated unevenness coefficient threshold of the three-phase current. Whether the resistance value of each phase starting resistor is normal is determined by measuring the relative size of the effective value of each phase current on each phase starting resistor, so as to facilitate timely detection of the three-phase unbalanced fault of the starting resistor.

[0046] In another embodiment provided by the present invention, the step S102 specifically includes:

[0047] The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t);

[0048] Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

[0049] In the specific implementation of this embodiment, according to the real-time measurement of the effective value of the three-phase current, the real-time effective value of each phase current is counted, and at the same time t, the real-time maximum current I on the starting resistor in the three phases is max (t) and the real-time maximum current I min (t), according to the formula α(t)=I max (t) / I min (t), calculate the dynamic non-uniformity coefficient at different times t. α changes dynamically with time, so it is called the dynamic non-uniformity coefficient.

[0050] By real-time detection of the effective value of each phase current and real-time calculation of the dynamic unevenness coefficient, real-time detection of the three-phase unbalanced fault of the starting resistor can be achieved.

[0051] In another embodiment provided by the present invention, the step S103 specifically includes:

[0052] Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system;

[0053] According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ;

[0054] Simulate the maximum peak current I of the starting resistor value of the flexible DC system max0 and the minimum peak current I min0 ;

[0055] Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 .

[0056] In the specific implementation of this embodiment, the rated resistance value R of the three-phase starting resistor of the flexible DC system can be specifically obtained by querying the configuration information of the three-phase resistor. The rated resistance values ​​of the three-phase starting resistors of the flexible DC system are initially set to be the same, but when different resistors are manufactured, there is a natural allowable deviation σ due to the process;

[0057] According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ; R max =R+σ; R min =R-σ;

[0058] Assuming an extreme case, among the three-phase starting resistors: the resistance of one phase starting resistor is R min , the resistance of the other two phase starting resistors is R max ; or the resistance of the two-phase starting resistor is R min , the resistance of the other phase starting resistor is R max .

[0059] The current of each phase on the starting resistor under natural deviation can be calculated by simulation, and the maximum peak current I under extreme conditions can be calculated. max0 and the minimum peak current I min0 ;

[0060] Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 .

[0061] When α>α0, a three-phase unbalanced fault occurs in the starting resistor, and the system alarms. The operating personnel can inspect and maintain the starting resistor according to the alarm situation to avoid the accident from expanding.

[0062] It should be noted that the present invention can also calculate different three-phase current unevenness coefficient thresholds α according to various resistance imbalance conditions. ％ ~α N , set multiple alarm levels according to the severity, and realize multiple alarm levels according to the relationship between the dynamic unevenness coefficient and different unevenness coefficient thresholds.

[0063] By calculating the three-phase uneven coefficient threshold, it is used to detect the three-phase unbalanced fault of the starting resistor. Generally speaking, the resistance of the starting resistor is relatively constant after it is manufactured. In the case of no fault, the resistance will not increase or decrease significantly and will not exceed the range (Rmin ~R max ). The resistance value of the resistor that causes different short-circuit faults may be between 0 and R min In the case of a short-circuit fault in one phase, the three-phase current unevenness coefficient α will be greater than α0. This realizes the detection of three-phase unbalanced fault.

[0064] The embodiment of the present invention provides a method for detecting a three-phase unbalanced fault of a starting resistor, detecting the real-time effective value of each phase current of the three-phase starting resistor of a flexible DC system; calculating the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; when the dynamic unevenness coefficient is greater than the pre-calculated unevenness coefficient threshold of the three-phase current, it is determined that a three-phase unbalanced fault occurs in the starting resistor. By measuring the relative size of the effective value of each phase current on each phase starting resistor, it is determined whether the resistance value of each phase starting resistor is normal, so as to facilitate timely detection of the three-phase unbalanced fault of the starting resistor.

[0065] The embodiment of the present invention also provides a detection device for a three-phase unbalanced fault of a starting resistor, see Figure 2 , is a schematic diagram of the structure of a detection device for a three-phase unbalanced fault of a starting resistor provided by an embodiment of the present invention, the device comprising: a current detection module, an uneven coefficient calculation module and a determination module;

[0066] The current detection module is used to detect the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system;

[0067] The uneven coefficient calculation module is used to calculate the real-time dynamic uneven coefficient of the flexible DC system according to the effective value of each phase current;

[0068] The determination module is used to determine that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unbalanced coefficient is greater than a pre-calculated unbalanced coefficient threshold of the three-phase current.

[0069] In another embodiment provided by the present invention, the non-uniformity coefficient calculation module is specifically used for:

[0070] The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t);

[0071] Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

[0072] In another embodiment provided by the present invention, the calculation process of the non-uniformity coefficient threshold specifically includes:

[0073] Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system;

[0074] According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ;

[0075] Simulate the maximum peak current I in the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ;

[0076] Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 .

[0077] It should be noted that the specific functions of the various modules of the device for detecting the three-phase unbalanced fault of the starting resistor provided in this embodiment have been specifically described in the above embodiments and will not be repeated here.

[0078] The embodiment of the present invention also provides a terminal device, see Figure 3 , is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a detection program for a three-phase unbalanced fault of a starting resistor. When the processor executes the computer program, the steps in the above-mentioned detection method for a three-phase unbalanced fault of a starting resistor are implemented, such as Figure 1 The steps shown are a method for detecting a three-phase unbalanced fault of a starting resistor. Alternatively, when the processor executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are realized, such as a device for detecting a three-phase unbalanced fault of a starting resistor.

[0079] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program in the terminal device. For example, the computer program may be divided into a current detection module, an uneven coefficient calculation module, and a determination module, and the specific functions of each module are not described in detail herein.

[0080] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or may combine certain components, or different components. For example, the terminal device may also include an input / output device, a network access device, a bus, etc.

[0081] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0082] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the terminal device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0083] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0084] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0085] The present invention provides a detection method, device, equipment and medium for a three-phase unbalanced fault of a starting resistor, which detects the real-time effective value of each phase current of the three-phase starting resistor of a flexible DC system; calculates the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; and determines that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unevenness coefficient is greater than a pre-calculated unevenness coefficient threshold of the three-phase current. Whether the resistance value of each phase starting resistor is normal is determined by measuring the relative size of the effective value of each phase current on each phase starting resistor, so as to facilitate timely detection of the three-phase unbalanced fault of the starting resistor.

[0086] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for detecting a three-phase unbalanced fault of a starting resistor, characterized in that: include: Detect the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system; Calculating the real-time dynamic unevenness coefficient of the flexible DC system according to the effective value of each phase current; When the dynamic unevenness coefficient is greater than the pre-calculated unevenness coefficient threshold of the three-phase current, it is determined that a three-phase unbalanced fault occurs in the starting resistor; The calculation process of the non-uniform coefficient threshold specifically includes: Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system; According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ; Simulate the maximum peak current I in the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ; Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 The simulation is performed on the maximum peak current I of the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ,include: The simulation calculates the current of each phase on the starting resistor under natural deviation, and calculates the maximum peak current I under extreme conditions. max0 and the minimum peak current I min0 ; The extreme cases include: Among the three-phase starting resistors: the resistance of one phase starting resistor is R min , the resistance of the other two phase starting resistors is R max ; or the resistance of the two-phase starting resistor is R min , the resistance of the other phase starting resistor is R max .

2. The method for detecting a three-phase unbalanced fault of a starting resistor according to claim 1, characterized in that: The calculating of the real-time dynamic non-uniformity coefficient of the flexible DC system according to the effective value of each phase current specifically includes: The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t); Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

3. A detection device for three-phase unbalanced fault of starting resistance, characterized in that: include: Current detection module, uneven coefficient calculation module and determination module; The current detection module is used to detect the real-time effective value of each phase current of the three-phase starting resistor of the flexible DC system; The uneven coefficient calculation module is used to calculate the real-time dynamic uneven coefficient of the flexible DC system according to the effective value of each phase current; The determination module is used to determine that a three-phase unbalanced fault occurs in the starting resistor when the dynamic unbalanced coefficient is greater than a pre-calculated unbalanced coefficient threshold of the three-phase current; The calculation process of the non-uniform coefficient threshold specifically includes: Obtaining a rated resistance value R and a natural allowable deviation σ of a three-phase starting resistor of the flexible DC system; According to the rated resistance value R and the natural allowable deviation σ, calculate the theoretical maximum starting resistance R of the three-phase starting resistor max and the theoretical minimum starting resistance R min ; Simulate the maximum peak current I in the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ; Calculate the non-uniformity coefficient threshold α0=I max0 / I min0 The simulation is performed on the maximum peak current I of the starting resistor of the flexible DC system max0 and the minimum peak current I min0 ,include: The simulation calculates the current of each phase on the starting resistor under natural deviation, and calculates the maximum peak current I under extreme conditions. max0 and the minimum peak current I min0 ; The extreme cases include: Among the three-phase starting resistors: the resistance of one phase starting resistor is R min , the resistance of the other two phase starting resistors is R max ; or the resistance of the two-phase starting resistor is R min , the resistance of the other phase starting resistor is R max .

4. The detection device for the three-phase unbalanced fault of the starting resistor according to claim 3, characterized in that: The non-uniform coefficient calculation module is specifically used for: The real-time maximum current value I among the effective values ​​of each phase current at the statistical time t max (t) and the real-time current minimum value I min (t); Calculate the dynamic non-uniformity coefficient α(t) = I max (t) / I min (t).

5. A terminal device, characterized in that: It comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements a method for detecting a three-phase unbalanced fault of a starting resistor as described in any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute a method for detecting a three-phase unbalanced fault of a starting resistor as claimed in any one of claims 1 to 2.

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