CN112698236B - Station power failure judgment method and device, computer equipment and storage medium - Google Patents
Station power failure judgment method and device, computer equipment and storage medium Download PDFInfo
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Abstract
The application relates to a method, a device, computer equipment and a storage medium for judging faults of a power supply for a station, wherein the method comprises the steps of acquiring a target voltage signal of the power supply for the station, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal; respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component; and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal. The fault phase of the power supply for the station can be clearly and accurately determined by the fault of the power supply for the station, so that the reliability and the stability of the power supply for the station can be improved.
Description
Technical Field
The present application relates to the field of power system technologies, and in particular, to a method and an apparatus for determining a station power failure, a computer device, and a storage medium.
Background
With the development of society, the station equipment of transformer substation is continuously increasing, and the function is continuously strengthened. To ensure the normal use of the station equipment, it is increasingly important to detect and protect the fault of the station power supply of the station equipment. The fault detection of the station power supply is inaccurate, and the station power supply cannot be effectively protected, so that the reliability and the stability of the station equipment are poor.
In the conventional technology, the fault of the power supply for the station is determined by acquiring a voltage or current signal on a bus of the power supply for the station and comparing the voltage or current signal with a voltage or current signal of the power supply for the station under normal operation. However, the method of determining the failure of the station power supply in this way is not accurate.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus, a computer device, and a storage medium for determining a power failure of a station.
In a first aspect, an embodiment of the present application provides a method for determining a fault of a station power supply, including:
acquiring a target voltage signal of a power supply for a station, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal;
respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component;
and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal.
In one embodiment, determining a failed phase of the station power supply based on the fault voltage signal comprises:
determining a plurality of fault voltage vectors of the fault voltage signals on the phase lines according to the fault voltage signals;
a fault phase of the station power supply is determined based on the plurality of fault voltage vectors.
In one embodiment, determining a faulted phase of a station power supply from a plurality of fault voltage vectors comprises:
and if the fault voltage vector is not zero, the phase line corresponding to the fault voltage vector is the fault phase of the station voltage.
In one embodiment, determining the positive, negative and zero sequence components of the target voltage signal comprises:
determining a plurality of voltage vectors of the target voltage signal on the poly-phase line;
based on a symmetrical component method, a positive sequence component, a negative sequence component and a zero sequence component are determined according to a plurality of voltage vectors.
In one embodiment, the method further comprises the following steps:
and determining the fault type of the station power supply according to the fault voltage signal.
In one embodiment, after determining the fault type of the station power supply according to the fault voltage signal, the method further includes:
and generating warning information corresponding to the fault type according to the fault type of the station power supply.
In one embodiment, obtaining a target voltage signal for a power supply for a station includes:
acquiring an initial voltage signal of a station power supply;
and carrying out voltage reduction processing on the voltage signal to obtain a target voltage signal.
In a second aspect, an embodiment of the present application provides a station power failure determination apparatus, including:
the acquisition module is used for acquiring a voltage signal of the station power supply and determining a positive sequence component, a negative sequence component and a zero sequence component of the voltage signal;
the computing module is used for respectively computing the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component;
and the determining module is used for synthesizing the unbalance into a fault voltage signal and determining a fault phase of the station power supply according to the fault voltage signal.
In a third aspect, an embodiment of the present application provides a computer device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method provided in the above embodiment when executing the computer program.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method provided in the above embodiment.
The embodiment of the application provides a method and a device for judging station power failure, computer equipment and a storage medium. The method for judging the fault of the power supply for the station comprises the steps of obtaining a target voltage signal of the power supply for the station, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal; respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component; and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal. According to the fault judging method for the power supply for the station, the unbalance of the positive sequence component, the negative sequence component and the zero sequence component of the target voltage signal is extracted to synthesize the fault voltage signal, the fault voltage signal is the voltage signal when the power supply for the station has a fault, and the fault phase of the power supply for the station can be clearly and accurately determined according to the fault voltage signal, so that the reliability and the stability of the power supply for the station can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating steps of a station power failure determination method according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating steps of a station power failure determination method according to an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating steps of a station power failure determination method according to an embodiment of the present application;
fig. 4 is a schematic flowchart illustrating steps of a station power failure determination method according to an embodiment of the present application;
fig. 5 is a schematic flowchart illustrating steps of a station power failure determination method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a station power failure determination apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus of a computer apparatus according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
The following describes the technical solution of the present application and how to solve the technical problem in detail by using specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
The power supply fault judgment method for the station power supply can be applied to a power supply system and a power utilization branch circuit of the station power supply. By the aid of the station power supply fault judging method, whether a power supply system or a power utilization branch of the station power supply has faults or not can be detected, and fault phase lines exist in the station power supply bus. After the method is used for judging the fault of the station power supply, the staff can make corresponding protective measures according to the fault, so that the reliability of the station power supply can be improved.
The station power supply fault judgment method can be realized through computer equipment. Computer devices include, but are not limited to, control chips, personal computers, laptops, smartphones, tablets, and portable wearable devices. The method provided by the application can be realized through JAVA software and can also be applied to other software.
Referring to fig. 1, an embodiment of the present application provides a method for determining a station power failure, where the method includes:
The target voltage signal is a voltage signal on a bus of the station power supply. In practical use, a voltage transformer may be installed at a bus of the station power supply, and a target voltage signal on the bus of the station power supply may be detected using the voltage transformer. The voltage transformer can send the detected voltage signal to the computer equipment, and the computer equipment stores the received voltage signal and directly obtains the voltage signal from the memory when in use. The voltage transformer can be internally provided with a storage device, the storage device can store voltage signals detected by the voltage transformer, and the computer device directly obtains the voltage signals from the built-in storage device of the voltage transformer when the computer device needs to obtain target voltage signals of the station power supply. The present embodiment does not set any limitation to a specific method of acquiring the target voltage signal of the power supply for the station as long as the function thereof can be achieved.
The positive sequence component, the negative sequence component and the zero sequence component are all characteristic quantities, and are quantities which can be presented along with the change of the environment. The positive sequence component, the negative sequence component, and the zero sequence component are determined according to the order of the a-phase line, the B-phase line, and the C-phase line. The A phase line of the positive sequence component leads the B phase line by 120 degrees, the B phase line leads the C phase line by 120 degrees, and the C phase line leads the A phase line by 120 degrees. The A phase line of the negative sequence component is 120 degrees behind the B phase line, the B phase line is 120 degrees behind the C phase line, and the C phase line is 120 degrees behind the A phase line. The phase positions of the phase line A, the phase line B and the phase line C of the zero sequence component are the same. The positive, negative and zero sequence components each include phase, amplitude and frequency information. The positive sequence component is always present, and the negative and zero sequence components may not be present, and in general, the negative sequence component will be present when a short circuit fault occurs, and the zero sequence component will be present when a ground fault occurs. The computer device may determine a positive sequence component, a negative sequence component, and a zero sequence component of the target voltage from the acquired target voltage. The present embodiment does not limit any specific method for determining the positive sequence component, the negative sequence component, and the zero sequence component of the target voltage, as long as the functions thereof can be realized.
after the computer equipment obtains the positive sequence component, the negative sequence component and the zero sequence component of the target voltage signal, the unbalance amount in the positive sequence component, the negative sequence component and the zero sequence component is calculated respectively. The positive sequence component comprises an A phase line, a B phase line and a C phase line, and the unbalance of the positive sequence component refers to the unbalance of the amplitude, the phase or the frequency among the A phase line, the B phase line and the C phase line in the positive sequence component. If the amplitude of the phase line a in the positive sequence component is the same as the amplitude of the phase line B, and the amplitude of the phase line C is greater than the amplitude of the phase line a, the unbalance amount of the amplitudes in the positive sequence component is the difference between the amplitudes of the phase lines C and a. Similarly, the unbalance of the frequency and the phase in the positive sequence component can be obtained, so that the unbalance of the positive sequence component is finally obtained. The computer device can obtain the unbalance amount of the negative sequence component and the zero sequence component according to the same method. The unbalance of the positive, negative and zero sequence components may be zero. The embodiment does not limit the method for specifically calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component, as long as the function thereof can be realized.
And step 300, synthesizing the unbalance into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal.
And the computer equipment synthesizes the unbalance quantities of the positive sequence component, the negative sequence component and the zero sequence component obtained by calculation, so that a fault voltage signal can be formed. The amount of imbalance may be used to characterize whether the target voltage signal is faulty. If the unbalance amount is zero, the representation target voltage signal is normal, namely the station power supply has no fault. And if the unbalance amount is not zero, synthesizing the unbalance zero to obtain a fault voltage signal. The fault voltage signal is a voltage signal which is used for extracting faults and can represent that the station power supply has faults. The phase line on which the station power supply fails can be determined from the fault voltage signal. The present embodiment does not set any limit to the method of synthesizing the unbalance amount into the fault voltage signal, and the method of determining the faulty phase of the station power supply based on the fault voltage signal.
The method for judging the fault of the station power supply comprises the steps of obtaining a target voltage signal of the station power supply, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal; respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component; and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal. According to the station power supply fault judgment method provided by the embodiment of the application, unbalance amounts of a positive sequence component, a negative sequence component and a zero sequence component of a target voltage signal are extracted to synthesize a fault voltage signal. The fault voltage signal is the voltage signal when the power supply for the station has a fault, so that the fault voltage signal can be more accurate and clearly determines the fault phase of the power supply for the station, so that a worker can timely process the fault of the power supply for the station, and the reliability and the stability of the power supply for the station can be improved.
Referring to fig. 2, in one embodiment, one possible implementation of the step 300 of determining the failed phase of the station power supply according to the fault voltage signal includes:
step 310, determining a plurality of fault voltage vectors of the fault voltage signal on the plurality of phase lines according to the fault voltage signal.
The computer device can decompose the obtained fault voltage signal to obtain a fault voltage vector of the fault voltage signal on each phase line. If the three-phase line is adopted by the station power bus, the computer equipment can determine the fault voltage vectors of the fault voltage signals on the three-phase line according to the fault voltage signals.
And step 320, determining the fault phase of the power supply for the station according to the plurality of fault voltage vectors.
And the computer equipment can determine the phase line with the fault of the station power supply according to the obtained multiple fault voltage vectors corresponding to the multiple phase lines. In an alternative embodiment, the computer device may determine the failed phase of the station power supply by determining whether the corresponding fault voltage vector on the phase line is zero.
In the embodiment, the fault electric quantity vector on each phase line is determined according to the fault voltage signal, so that the fault phase of the station power supply can be clearly and accurately determined according to the fault voltage vector.
With continued reference to fig. 2, in one embodiment, step 320 determines a fault phase of the station power supply based on a plurality of fault voltage vectors, including:
in step 321, if the fault voltage vector is not zero, the phase line corresponding to the fault voltage vector is a fault phase of the station voltage.
The computer equipment can judge whether the corresponding fault voltage vector on each phase line is zero or not, if the fault voltage vector on a certain phase line is zero, the fault voltage vector does not exist on the phase line, and the phase line of the station power supply does not have a fault; if the fault voltage vector on a certain phase line is not zero, the fault voltage vector exists on the phase line, namely, the fault exists on the phase line of the station power supply.
Referring to fig. 3, in one embodiment, one possible implementation of the step 100 of determining the positive sequence component, the negative sequence component, and the zero sequence component of the target voltage signal includes:
And the computer equipment can obtain voltage vectors on the phase lines according to the obtained target voltage signal. If the station is usedThe buses of the power supply are three-phase power, and the computer equipment can obtain voltage vectors on the phase line A, the phase line B and the phase line C. The voltage vector on the a-phase line can be represented as U A The voltage vectors on the B-phase line can be represented as U B The voltage vector on the C-phase line can be represented as U C 。
And step 120, determining a positive sequence component, a negative sequence component and a zero sequence component according to the plurality of voltage vectors based on a symmetrical component method.
After the computer equipment obtains the voltage vectors on the phase lines in the bus of the station power supply, the positive sequence component, the negative sequence component and the zero sequence component of the target voltage signal can be determined according to a symmetric component method. For the description of the positive sequence component, the negative sequence component and the zero sequence component, reference may be made to the description in the above embodiments, and details are not repeated here. Suppose that the zero sequence component is denoted as U 0 The positive sequence component is denoted as U 1 The negative sequence component being denoted as U 2 The computer device may calculate the positive sequence component, the negative sequence component, and the zero sequence component according to the following formulas. In this embodiment, the positive sequence component, the negative sequence component, and the zero sequence component can be determined quickly and simply using a symmetric component method.
In an alternative embodiment, a voltage transformer may be provided directly on each of the three phase lines on the bus of the station power supply to detect the voltage on each of the three phase lines. The computer device may determine the positive, negative and zero sequence components using a symmetric component method from the detected voltages on the three phase lines.
Referring to fig. 4, in an embodiment, the method for determining a station power failure further includes
And step 400, determining the fault type of the station power supply according to the fault voltage signal.
The computer equipment can determine the fault type of the station power supply according to different fault judgment conditions according to the obtained fault voltage signal. In an alternative embodiment, the computer device compares the amplitude of the obtained fault voltage signal with the amplitude of the voltage signal of the station power supply under normal operation, and if the two are the same, the fault type of the station power supply is single-phase disconnection and single-phase grounding. In another alternative embodiment, the computer device may determine whether a crossover resonance or a high frequency resonance fault exists in the station power supply based on the frequency and phase of the fault voltage signal. In the present embodiment, the specific procedure of determining the type of failure of the station power supply from the failure voltage signal is not limited as long as the function thereof can be achieved. In this embodiment, by determining the fault type of the station power supply, a worker can perform targeted maintenance and the like on the fault.
With continued reference to fig. 4, in an embodiment, after determining the fault type of the station power supply according to the fault voltage signal in step 400, the method for determining the fault of the station power supply further includes:
and 500, generating warning information corresponding to the fault type according to the fault type of the station power supply.
After determining the fault type of the station power supply, the computer equipment sends out different warning information corresponding to different fault types. For example: when it is determined that the type of the power supply for the station is a ground fault, it is possible to issue "notice that a ground fault occurs! "voice and text warning information; when the fault type of the station with the energy source is determined to be short-circuit fault, a' station power source short-circuit fault can be sent out, please process as soon as possible! Voice and text warning information. The embodiment does not limit the specific warning information, and the user can set the warning information according to the actual situation. In this embodiment, different warning information generated for different fault types can timely notify the staff when the station power supply fails, so that the staff can clearly acquire a specific fault type, and accordingly, corresponding measures can be timely implemented for the fault, and the reliability of the station power supply can be improved.
In one embodiment, the station power failure determination method further includes: the computer device generates warning information corresponding to the failure according to the failure phase of the station power supply. When different phase lines have faults, different warning information can be generated. For example: if the phase line A fails, the computer equipment can send out warning information that the phase line A fails.
Referring to fig. 5, in an embodiment, a possible implementation manner of obtaining the target voltage signal of the station power supply in step 100 includes:
And 140, carrying out voltage reduction processing on the initial voltage signal to obtain a target voltage signal.
The voltage on the bus of the station power supply acquired by the voltage transformer is an initial voltage signal. In general, the amplitude of the initial voltage signal of the station power supply directly obtained is large. After the computer equipment obtains the initial voltage signal, the voltage reduction processing is carried out on the initial voltage signal, and the initial voltage signal with larger amplitude can be reduced into the target voltage signal with low amplitude. In an alternative embodiment, the computer device may input the initial voltage signal to the voltage reduction circuit. The voltage reduction circuit is used for carrying out voltage reduction processing on the initial voltage signal to obtain a target voltage signal. The computer equipment acquires the output signal of the voltage reduction circuit, and can acquire a target voltage signal. In another optional embodiment, a voltage reduction module may be built in the computer device, and after the computer device obtains the initial voltage signal, the purpose of performing voltage reduction processing on the initial voltage signal may be achieved through the voltage reduction module. In a specific embodiment, the initial voltage signal is 220V, and the target voltage signal after the initial voltage signal is stepped down is 3V.
In this embodiment, the initial voltage signal is subjected to voltage reduction processing to obtain a target voltage signal with a smaller amplitude, so that subsequent processing of the target voltage signal is facilitated.
It should be understood that, although the steps in the flowchart are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least some of the steps in the figures may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of execution of the steps or stages is not necessarily sequential, but may be performed alternately or in alternation with other steps or at least some of the other steps or stages.
Referring to fig. 6, an embodiment of the present application provides a station power failure determination apparatus 10, which includes an obtaining module 100, a calculating module 200, and a determining module 300. Wherein the content of the first and second substances,
the obtaining module 100 is configured to obtain a voltage signal of the station power supply, and determine a positive sequence component, a negative sequence component, and a zero sequence component of the voltage signal.
The calculation module 200 is configured to calculate the unbalance amounts of the positive sequence component, the negative sequence component and the zero sequence component respectively.
The determining module 300 is configured to combine the unbalance amounts into a fault voltage signal, and determine a fault phase of the station power supply according to the fault voltage signal.
In one embodiment, the determining module 300 is specifically configured to determine a plurality of fault voltage vectors of the fault voltage signal on the plurality of phase lines according to the fault voltage signal; a fault phase of the station power supply is determined based on the plurality of fault voltage vectors.
In one embodiment, the determining module 300 is further configured to determine that the phase line corresponding to the fault voltage vector is a fault phase of the station voltage if the fault voltage vector is not zero.
In one embodiment, the obtaining module 100 is specifically configured to determine a plurality of voltage vectors of the target voltage signal on the poly-phase line; and determining a positive sequence component, a negative sequence component and a zero sequence component according to a plurality of voltage vectors based on a symmetrical component method.
In one embodiment, the station power failure determination apparatus 10 further includes a failure type determination module.
And the fault type determining module is used for determining the fault type of the station power supply according to the fault voltage signal.
In one embodiment, the station power failure determination apparatus 10 further includes an alert module.
The warning module is used for generating warning information corresponding to the fault type according to the fault type of the station power supply.
In one embodiment, the obtaining module 100 is further specifically configured to obtain an initial voltage signal of the station power supply; and carrying out voltage reduction processing on the initial voltage signal to obtain a target voltage signal.
For specific limitations of the station power failure determination apparatus 10, reference may be made to the above limitations of the station power failure determination method, which are not described herein again. The respective modules in the power failure determination apparatus 10 may be wholly or partially implemented by software, hardware, and a combination thereof. The above devices, modules or units may be embedded in hardware or independent from a processor in a computer device, or may be stored in a memory in the computer device in software, so that the processor can call and execute operations corresponding to the above devices or modules.
Referring to fig. 7, in one embodiment, a computer device is provided, and the computer device may be a server, and the internal structure thereof may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the computer device is used for storing the target voltage signal, the fault voltage signal and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer device is executed by the processor to implement a station power failure determination method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the present application provides a computer device comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring a target voltage signal of a station power supply, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal;
respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component;
and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the fault voltage vector is not zero, the phase line corresponding to the fault voltage vector is the fault phase of the station voltage.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining a plurality of fault voltage vectors of the fault voltage signals on a plurality of phase lines according to the fault voltage signals; a fault phase of the station power supply is determined based on the plurality of fault voltage vectors.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining a plurality of voltage vectors of the target voltage signal on the poly-phase line; based on a symmetrical component method, a positive sequence component, a negative sequence component and a zero sequence component are determined according to a plurality of voltage vectors.
In one embodiment, the processor when executing the computer program further performs the steps of: and determining the fault type of the station power supply according to the fault voltage signal.
In one embodiment, the processor when executing the computer program further performs the steps of: and generating warning information corresponding to the fault type according to the fault type of the station power supply.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring an initial voltage signal of a station power supply; and carrying out voltage reduction processing on the initial voltage signal to obtain a target voltage signal.
In one embodiment, the present application provides a computer readable storage medium having a computer program stored thereon, the computer program when executed by a processor implementing the steps of:
acquiring a target voltage signal of a power supply for a station, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal;
respectively calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component;
and synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the fault voltage vector is not zero, the phase line corresponding to the fault voltage vector is the fault phase of the station voltage.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining a plurality of fault voltage vectors of the fault voltage signals on the phase lines according to the fault voltage signals; a fault phase of the station power supply is determined based on the plurality of fault voltage vectors.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining a plurality of voltage vectors of the target voltage signal on the poly-phase line; based on a symmetrical component method, a positive sequence component, a negative sequence component and a zero sequence component are determined according to a plurality of voltage vectors.
In one embodiment, the computer program when executed by the processor further performs the steps of: and determining the fault type of the station power supply according to the fault voltage signal.
In one embodiment, the computer program when executed by the processor further performs the steps of: and generating warning information corresponding to the fault type according to the fault type of the station power supply.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring an initial voltage signal of a station power supply; and carrying out voltage reduction processing on the initial voltage signal to obtain a target voltage signal.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in M forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SyMchliMk) DRAM (SLDRAM), raMbus (RaMus) direct RAM (RDRAM), direct RaMbus Dynamic RAM (DRDRAM), and RaMbus Dynamic RAM (RDRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A station power failure judgment method is characterized by comprising the following steps:
acquiring a target voltage signal of a station power supply, and determining a positive sequence component, a negative sequence component and a zero sequence component of the target voltage signal;
calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component respectively;
synthesizing the unbalance amount into a fault voltage signal, and determining a fault phase of the station power supply according to the fault voltage signal;
wherein the determining a fault phase of the station power supply from the fault voltage signal comprises:
determining a plurality of fault voltage vectors of the fault voltage signals on a plurality of phase lines according to the fault voltage signals;
determining a fault phase of the station power supply based on the plurality of fault voltage vectors;
wherein said determining a fault phase of said station power supply based on said plurality of fault voltage vectors comprises:
and if the fault voltage vector is not zero, the phase line corresponding to the fault voltage vector is the fault phase of the station power supply.
2. The method of claim 1, wherein the determining a positive sequence component, a negative sequence component, and a zero sequence component of the target voltage signal comprises:
determining a plurality of voltage vectors of the target voltage signal on a poly-phase line;
and determining the positive sequence component, the negative sequence component and the zero sequence component according to a plurality of voltage vectors based on a symmetrical component method.
3. The method of claim 1, further comprising:
and determining the fault type of the station power supply according to the fault voltage signal.
4. The method of claim 3, further comprising, after said determining a fault type of said station power supply from said fault voltage signal:
and generating warning information corresponding to the fault type according to the fault type of the station power supply.
5. The method of claim 1, wherein obtaining a target voltage signal for a power supply for the station comprises:
acquiring an initial voltage signal of the station power supply;
and carrying out voltage reduction processing on the initial voltage signal to obtain the target voltage signal.
6. A station power failure determination device, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a voltage signal of a station power supply and determining a positive sequence component, a negative sequence component and a zero sequence component of the voltage signal;
the calculation module is used for calculating the unbalance amount of the positive sequence component, the negative sequence component and the zero sequence component respectively;
the determining module is used for synthesizing the unbalance into a fault voltage signal and determining a fault phase of the station power supply according to the fault voltage signal;
the determining module is specifically configured to determine, according to the fault voltage signal, a plurality of fault voltage vectors of the fault voltage signal on a plurality of phase lines; determining a fault phase of the station power supply based on a plurality of the fault voltage vectors;
the determining module is specifically configured to determine that the phase line corresponding to the fault voltage vector is a fault phase of the station power supply if the fault voltage vector is not zero.
7. The apparatus of claim 6, wherein the acquisition module is specifically configured to determine a plurality of voltage vectors of the target voltage signal on the poly-phase line; and determining the positive sequence component, the negative sequence component and the zero sequence component according to a plurality of voltage vectors based on a symmetrical component method.
8. The apparatus of claim 6, wherein the determining module is configured to determine a fault type of the station power supply based on the fault voltage signal.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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