CN114217241B - Method, system, device and storage medium for detecting power-on fault - Google Patents
Method, system, device and storage medium for detecting power-on fault Download PDFInfo
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- CN114217241B CN114217241B CN202111383540.9A CN202111383540A CN114217241B CN 114217241 B CN114217241 B CN 114217241B CN 202111383540 A CN202111383540 A CN 202111383540A CN 114217241 B CN114217241 B CN 114217241B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The application discloses a method, a system, a device and a storage medium for detecting a channeling fault, wherein the method comprises the following steps: acquiring a first A-phase current, a first B-phase current, a first C-phase current and a first zero line current on a first zero line; obtaining a grounding current on a grounding wire of a second alternating current power supply; vector superposition is carried out on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current, and a vector superposition result is obtained; and determining the electricity channeling fault result of the alternating current power supply system for the station according to the grounding current and the vector superposition result. The application utilizes the vector superposition result of the first A phase current, the first B phase current, the first C phase current and the first zero line current which are measured on the first alternating current power supply to determine the channeling fault result of the alternating current power supply system for the station and the grounding current relation on the grounding line of the second alternating current power supply, reduces the cost of manually detecting the channeling fault, and has the characteristic of high detection efficiency. The method and the device can be widely applied to the technical field of ring network fault detection.
Description
Technical Field
The application relates to the technical field of ring network fault detection, in particular to a method for detecting a power-on fault and a control method.
Background
The station ac power supply system generally uses two sets of mutually independent ac power supplies to supply power, so as to form a "one-standby" power supply system, and when one set of ac power supply fails, the other set of standby ac power supply can still be used for supplying power.
Under normal conditions, the two sets of alternating current power supplies independently operate without mutual interference, and the load is distributed to the two sets of alternating current power supplies more uniformly. However, in the running process of the station alternating current power supply system, two sets of alternating current power supplies can have power channeling faults, so that the normal operation of the station alternating current power supply system is affected.
In order to ensure reliable operation of the station alternating current power supply system, workers must timely detect and locate the power-on fault, however, the existing detection and location of the power-on fault are finished by means of manual operation, and the fault detection efficiency is low.
Disclosure of Invention
In order to solve the technical problems, the application aims to: provided are a method, a system, a device and a storage medium for detecting a blowby fault.
The application adopts a technical scheme that:
the utility model provides a scurries electric fault detection method, is applied to the alternating current power supply system for the station, alternating current power supply system for the station includes first alternating current power supply and second alternating current power supply, first alternating current power supply includes first A phase line, first B phase line, first C phase line and first zero line, scurries electric fault detection method includes the following steps:
acquiring a first A-phase current on the first A-phase line, a first B-phase current on the first B-phase line, a first C-phase current on the first C-phase line and a first zero line current on the first zero line;
obtaining a grounding current on a grounding wire of the second alternating current power supply;
vector superposition is carried out on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current to obtain a vector superposition result;
and determining a channeling fault result of the station alternating current power supply system according to the grounding current and the vector superposition result.
Further, the first current signal includes a phase line current and a neutral line current, and the method for detecting a blowby fault further includes the steps of:
and positioning the power channeling fault.
Further, the step of locating the blowby fault includes the steps of:
acquiring a first load current on the first A phase line, and positioning the channeling fault according to the first load current;
acquiring a second load current on the first B phase line, and positioning the channeling fault according to the second load current;
and acquiring a third load current on the first C phase line, and positioning the channeling fault according to the third load current.
Further, the method for detecting the channeling electric fault further comprises the following steps:
and displaying the electricity channeling fault result.
Further, the method for detecting the channeling electric fault further comprises the following steps:
transmitting current data, the channeling fault result and the positioning condition of the channeling fault to a remote terminal device, wherein the current data comprises the first A-phase current, the first B-phase current, the first C-phase current, the first load current, the second load current and the third load current.
The other technical scheme adopted by the application is as follows:
a scurried electric fault detection system for a station ac power system, the station ac power system comprising a first ac power source and a second ac power source, the first ac power source comprising a first a-phase line, a first B-phase line, a first C-phase line, and a first neutral line, the scurried electric fault detection system comprising:
the first current acquisition module is used for acquiring a first A-phase current on the first A-phase line, a first B-phase current on the first B-phase line, a first C-phase current on the first C-phase line and a first zero line current on the first zero line;
the second current acquisition module is used for acquiring the grounding current on the grounding wire of the second alternating current power supply;
the calculation module is used for carrying out vector superposition on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current to obtain a vector superposition result;
and the judging module is used for determining the power-on fault result of the station alternating current power supply system according to the grounding current and the vector superposition result.
Further, the blowby fault detection system further includes:
and the fault positioning module is used for positioning the power-on fault.
The other technical scheme adopted by the application is as follows:
a blowby fault detection apparatus, comprising:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement a method of blowby fault detection as described previously.
The other technical scheme adopted by the application is as follows:
a storage medium having stored therein a processor-executable program, wherein the processor-executable program when executed by a processor is for implementing a method of blowby fault detection as described previously.
The beneficial effects of the application are as follows: the application utilizes the vector superposition result of the first A phase current, the first B phase current, the first C phase current and the first zero line current which are measured on the first alternating current power supply to determine the channeling fault result of the alternating current power supply system for the station and the grounding current relation on the grounding line of the second alternating current power supply, reduces the cost of manually detecting the channeling fault, and has the characteristic of high detection efficiency.
Drawings
FIG. 1 is a flow chart of steps of a method for detecting a blowby fault according to the present application;
FIG. 2 is a schematic diagram of a circuit model of a station AC power supply of a method for detecting a blowby fault according to the present application;
FIG. 3 is a schematic diagram of a circuit model of an AC power source of the station AC power system of the present application;
FIG. 4 is a schematic diagram of another circuit model of a station AC power supply of a method for detecting a blowby fault according to the present application;
FIG. 5 is a schematic diagram of another circuit model of a station AC power supply of a method for detecting a blowby fault according to the present application;
FIG. 6 is a schematic diagram of a system for generating a frame of a PLC program according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an embodiment of a PLC program frame generating apparatus according to the present application.
Detailed Description
The embodiment provides a method for detecting a power failure, which is applied to a station ac power system, referring to fig. 2, the station ac power system includes a first ac power source and a second ac power source, the first ac power source includes a first a-phase line, a first B-phase line, a first C-phase line and a first zero line, and referring to fig. 1, the method for detecting a power failure includes the following steps:
s1, acquiring a first A-phase current on a first A-phase line, a first B-phase current on a first B-phase line, a first C-phase current on a first C-phase line and a first zero line current on a first zero line;
s2, obtaining the grounding current on the grounding wire of the second alternating current power supply;
s3, vector superposition is carried out on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current, and a vector superposition result is obtained;
s4, determining a channeling fault result of the alternating current power supply system for the station according to the grounding current and the vector superposition result.
Referring to fig. 3,1la, 1Lb, and 1Lc are three-phase transformers of an ac power supply in a station ac power supply system, 1Rla is an equivalent load of an a phase line, 1Rlb is an equivalent load of a B phase line, 1Rlc is an equivalent load of a C phase line, and if values of the equivalent loads of the three phase lines are equal, a current vector sum on the three phase lines is 0, that is:
wherein, the liquid crystal display device comprises a liquid crystal display device,for alternating current on phase a>For ac current on phase B>Is an alternating current on the C-phase line.
However, in actual operation, it is difficult to make three-phase loads completely equal, so that superposition of three-phase alternating current vectors always generates a part of residual current, and the residual current flows back to a neutral point of the transformer through a zero line, that is, if alternating current on an a-phase line, a B-phase line, a C-phase line and the zero line is subjected to vector operation, no matter the value of the three-phase equivalent load of the alternating current power supply, as long as the alternating current power supply keeps a normal operation state, the result of vector operation on the alternating current on the a-phase line, the B-phase line, the C-phase line and the zero line is equal to zero, that is:
wherein, the liquid crystal display device comprises a liquid crystal display device,is an alternating current on the zero line.
If the equivalent load of the phase line of the alternating current power supply has a channeling fault, part of current returns to a neutral point from a loop of another alternating current power supply and does not pass through a zero line of the alternating current power supply, at the moment, alternating current on an A phase line, a B phase line, a C phase line and the zero line is measured, and the result of vector operation of the alternating current on the A phase line, the B phase line, the C phase line and the zero line is no longer equal to zero, namely:
the application utilizes the principle to detect the power-channeling fault condition of the alternating current power supply system for the station.
The first a-phase current on the first a-phase line, the first B-phase current on the first B-phase line, the first C-phase current on the first C-phase line, and the first zero-line current on the first zero-line are obtained, wherein the phase currents on the respective phase lines and the zero-line current can be collected by a current sensor (an embodiment of the current detection device), and the ground current on the ground line of the second ac power supply can be collected by the current sensor.
When the ac power supply system is operating normally, the vector sum of the ac currents on the a-phase line, the B-phase line, the C-phase line, and the zero line of the first ac power supply is 0, and no current flows into the second ac power supply, so that no current component can be detected on the ground line of the second ac power supply.
If the ac power supply system has a blowby fault, then some of the phase current flows into the second ac power supply, for example, the main current of the first a-phase current flows into the central line after flowing through the a-phase equivalent load, and some of the phase current flows into the second ac power supply, then flows into the ground network from the neutral line of the second ac power supply, and returns to the neutral point from the ground line of the first ac power supply to be combined with the main current), so that the vector superposition is performed on the first a-phase current, the first B-phase current, the first C-phase current and the first zero line current to obtain a vector superposition result, and the formula is as follows:
wherein, the liquid crystal display device comprises a liquid crystal display device,for the vector superposition result, ++>First phase A current, +.>First B-phase current, ">First C-phase line, ">A first zero line current.
And if the value of the vector superposition result is equal to the value of the grounding current on the grounding line of the second alternating current power supply, indicating that the station alternating current power supply has a power-channeling fault.
In one embodiment, referring to fig. 2, the blowby fault is a phase zero out-of-phase blowby fault, if the equivalent load of the C-phase line of the first ac power source fails at the fault point M1, the main current on the first C-phase line of the first ac power source returns to the neutral line after passing through the C-equivalent payload, and a portion of the current flows into the ground grid from the neutral line of the second ac power source after passing through the fault point, and returns from the ground line of the first ac power source to the neutral point to merge with the main current.
At this time, the alternating currents on the first a phase line, the B phase line, the C phase line and the zero line of the first power supply are subjected to vector superposition, a vector superposition result appears, and if the magnitude of the vector superposition result is equal to the magnitude of the grounding current measured on the grounding line of the second alternating current power supply, the occurrence of the power channeling fault of the alternating current power supply system for the station is indicated.
In another embodiment, referring to fig. 4, the blowby fault is a dissimilar phase blowby fault, if the equivalent load of the a-phase line of the first ac power source fails at the fault point M2, the main current on the first a-phase line of the first ac power source returns to the neutral line after passing through the a-phase equivalent load, and a part of the current flows into the ground network from the B-phase line of the second ac power source after passing through the fault point, and returns to the neutral point from the ground line of the first ac power source to join with the main current.
At this time, the alternating currents on the first a phase line, the B phase line, the C phase line and the zero line of the first power supply are subjected to vector superposition, a vector superposition result appears, and if the magnitude of the vector superposition result is equal to the magnitude of the grounding current measured on the grounding line of the second alternating current power supply, the occurrence of the power channeling fault of the alternating current power supply system for the station is indicated.
When the phase zero out-of-phase power-on fault and the phase different out-of-phase power-on fault exist simultaneously, referring to fig. 5, the phase zero out-of-phase power-on fault and the phase zero out-of-phase power-on fault of the first alternating current power supply and the second alternating current power supply are the phase different out-of-phase power-on faults of the first alternating current power supply and the second alternating current power supply, the first a-phase alternating current flows at the fault point M3, the main current flows back to the neutral line through the a-phase load, the shunt 1 flows into the ground network through the B-phase line of the second alternating current power supply after passing through the fault point M3, the shunt 2 returns to the neutral point from the ground line of the first alternating current power supply to be combined with the main current, and the shunt 2 flows into the ground network through the neutral line of the second alternating current after passing through the fault point M4.
At this time, the alternating currents on the first a phase line, the first B phase line, the first C phase line and the first zero line of the first alternating current power supply are measured and subjected to vector superposition, so that a vector superposition result appears, the numerical value of the proper superposition result is equal to the numerical value of the grounding current measured on the grounding line of the second alternating current power supply, and the station alternating current power supply system is indicated to have a power channeling fault.
In summary, the application utilizes the vector superposition result of the first A-phase current, the first B-phase current, the first C-phase current and the first zero-line current measured on the first alternating current power supply to determine the power failure result of the station alternating current power supply system by the relation between the vector superposition result and the grounding current on the grounding line of the second alternating current power supply, reduces the cost of manually detecting the power failure, and has the characteristic of high detection efficiency.
Further as an optional embodiment, the method for detecting a blowby fault further includes the steps of:
and positioning the power channeling fault.
Specifically, when the relation between the vector superposition result of the first A-phase current, the first B-phase current, the first C-phase current and the first zero-line current measured on the first alternating-current power supply and the grounding current on the grounding line of the second alternating-current power supply is utilized, and the situation that the station alternating-current power supply has a power-channeling fault is judged, the fault point of the power-channeling fault needs to be positioned, so that the maintenance personnel can conveniently maintain in time.
Further as an alternative embodiment, the step of locating the blowby fault includes the steps of:
acquiring a first load current on a first A phase line, and positioning a channeling fault according to the first load current;
acquiring a second load current on the first B phase line, and positioning a channeling fault according to the second load current;
and acquiring a third load current on the first C phase line, and positioning the channeling fault according to the third load current.
Specifically, the embodiment provides a way to locate the fault point of the blowby fault.
If the load of the phase line is grounded or has electricity, electricity leakage faults can be caused. In one embodiment, a plurality of or multiple stages of loads are usually connected to the first a-phase line, and the application obtains the first load current of each load branch on the first a-phase line, and carries out vector superposition on the plurality of first load currents, if no power-on fault occurs, the vector sum of the first load currents of each load branch should be equal to the first a-phase current in the normal operation state in magnitude and the direction, if the vector sum is not equal to the first a-phase current in the normal operation state, it indicates that the power-on fault occurs in one or some load branches, and the power-on fault point can be located by comparing the difference between the first load currents and the first load current in the normal operation state.
By the same principle, the electricity-channeling fault point on the first B phase line, the electricity-channeling fault point on the first C phase line and a plurality of electricity-channeling fault points when electricity-channeling occurs to the multi-phase line can be positioned.
Further as an optional embodiment, the method for detecting a blowby fault further includes the steps of:
and displaying the electricity channeling fault result.
Specifically, when the electricity-channeling fault occurs, the electricity-channeling fault result can be selected, wherein the electricity-channeling fault result comprises position information of the electricity-channeling fault, occurrence time points of the electricity-channeling fault and the like, so that workers can conveniently know the information of the electricity-channeling fault in time and maintain the electricity-channeling fault in time. In one embodiment, a liquid crystal display may be used to display the power failure results and the interactive functionality may be implemented using the liquid crystal display.
Further as an alternative embodiment, the current data, the blowby fault result, and the location of the blowby fault are transmitted to a remote terminal device, the current data including a first a-phase current, a first B-phase current, a first C-phase current, a first load current, a second load current, and a third load current.
Specifically, the application also transmits the current data, the channeling fault result and the positioning condition of the channeling fault to the remote terminal equipment in real time, so that the on-site staff can conveniently know the running condition of the first station alternating current power supply system in time.
Next, a system for detecting a blowby fault according to an embodiment of the present application will be described with reference to the accompanying drawings.
FIG. 6 is a schematic diagram of a system for detecting a fault in a battery in accordance with one embodiment of the present application.
The system specifically comprises:
a first current obtaining module 201, configured to obtain a first a-phase current on a first a-phase line, a first B-phase current on a first B-phase line, a first C-phase current on a first C-phase line, and a first zero line current on a first zero line;
a second current acquisition module 202, configured to acquire a ground current on a ground line of a second ac power supply;
the calculation module 203 is configured to perform vector superposition on the first a-phase current, the first B-phase current, the first C-phase line and the first zero line current to obtain a vector superposition result;
and the judging module 204 is used for determining the electricity channeling fault result of the alternating current power supply system for the station according to the grounding current and the vector superposition result.
It can be seen that the content in the above method embodiment is applicable to the system embodiment, and the functions specifically implemented by the system embodiment are the same as those of the method embodiment, and the beneficial effects achieved by the method embodiment are the same as those achieved by the method embodiment.
Referring to fig. 7, an embodiment of the present application provides a device for detecting a blowby fault, including:
at least one processor 301;
at least one memory 302 for storing at least one program;
at least one program, when executed by at least one processor 301, causes the at least one processor 301 to implement a method of blowby fault detection.
Similarly, the content in the above method embodiment is applicable to the embodiment of the present device, and the functions specifically implemented by the embodiment of the present device are the same as those of the embodiment of the above method, and the beneficial effects achieved by the embodiment of the above method are the same as those achieved by the embodiment of the above method.
The embodiment of the application also provides a storage medium, wherein the storage medium stores processor-executable instructions, and the processor-executable instructions are used for executing a channeling electricity fault detection method when being executed by a processor. Similarly, the content in the above method embodiment is applicable to the present storage medium embodiment, and the specific functions of the present storage medium embodiment are the same as those of the above method embodiment, and the achieved beneficial effects are the same as those of the above method embodiment.
In some alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flowcharts of the present application are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed, and in which sub-operations described as part of a larger operation are performed independently.
Furthermore, while the application is described in the context of functional modules, it should be appreciated that, unless otherwise indicated, one or more of the described functions and/or features may be integrated in a single physical device and/or software module or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary to an understanding of the present application. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be apparent to those skilled in the art from consideration of their attributes, functions and internal relationships. Accordingly, one of ordinary skill in the art can implement the application as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative and are not intended to be limiting upon the scope of the application, which is to be defined in the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in the form of a software product stored in a storage medium, comprising several programs for causing an apparatus (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable programs for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with a program execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the programs from the program execution system, apparatus, or device and execute the programs. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the program execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the foregoing description of the present specification, reference has been made to the terms "one embodiment/example", "another embodiment/example", "certain embodiments/examples", and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (6)
1. The utility model provides a scurries electric fault detection method, is applied to station and uses alternating current power supply system, station and uses alternating current power supply system including first alternating current power supply and second alternating current power supply, first alternating current power supply includes first A phase line, first B phase line, first C phase line and first zero line, characterized in that scurries electric fault detection method includes the following steps:
acquiring a first A-phase current on the first A-phase line, a first B-phase current on the first B-phase line, a first C-phase current on the first C-phase line and a first zero line current on the first zero line;
obtaining a grounding current on a grounding wire of the second alternating current power supply;
vector superposition is carried out on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current to obtain a vector superposition result;
determining a channeling fault result of the station alternating current power supply system according to the grounding current and the vector superposition result; when the magnitude of the vector superposition result is equal to the magnitude of the grounding current of the second alternating current power supply, judging that the station alternating current power supply system has a power channeling fault;
locating a channeling fault: acquiring a first load current on a first A phase line, a second load current on a first B phase line and a third load current on a first C phase line;
if the first load current is different from the load current in the normal running state, positioning a load corresponding to the first load current as a fault point; the second load current is different from the load current in the normal running state, and the load corresponding to the second load current is positioned as a fault point; and locating a load corresponding to the third load current as a fault point in the third load current which is different from the load current in the normal operation state.
2. The method of claim 1, further comprising the steps of:
and displaying the electricity channeling fault result.
3. The method of claim 1, further comprising the steps of:
transmitting current data, the channeling fault result and the positioning condition of the channeling fault to a remote terminal device, wherein the current data comprises the first A-phase current, the first B-phase current, the first C-phase current, the first load current, the second load current and the third load current.
4. The utility model provides a scurries electric fault detection system, is applied to station and uses alternating current power supply system, station and uses alternating current power supply system to include first alternating current power supply and second alternating current power supply, first alternating current power supply includes first A phase line, first B phase line, first C phase line and first zero line, its characterized in that, scurries electric fault detection system includes:
the first current acquisition module is used for acquiring a first A-phase current on the first A-phase line, a first B-phase current on the first B-phase line, a first C-phase current on the first C-phase line and a first zero line current on the first zero line;
the second current acquisition module is used for acquiring the grounding current on the grounding wire of the second alternating current power supply;
the calculation module is used for carrying out vector superposition on the first A-phase current, the first B-phase current, the first C-phase line and the first zero line current to obtain a vector superposition result;
the judging module is used for determining a channeling fault result of the station alternating current power supply system according to the grounding current and the vector superposition result; when the magnitude of the vector superposition result is equal to the magnitude of the grounding current of the second alternating current power supply, judging that the station alternating current power supply system has a power channeling fault;
the judging module is also used for positioning the power-on fault: acquiring a first load current on a first A phase line, a second load current on a first B phase line and a third load current on a first C phase line;
if the first load current is different from the load current in the normal running state, positioning a load corresponding to the first load current as a fault point; the second load current is different from the load current in the normal running state, and the load corresponding to the second load current is positioned as a fault point; and locating a load corresponding to the third load current as a fault point in the third load current which is different from the load current in the normal operation state.
5. An apparatus, comprising:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement a method of blowby fault detection as claimed in any one of claims 1-3.
6. A storage medium having stored therein a program executable by a processor, characterized in that: the processor-executable program when executed by a processor is for implementing a method of blowby fault detection as claimed in any one of claims 1-3.
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