CN113049913A - Distribution line online monitoring method, device and system - Google Patents
Distribution line online monitoring method, device and system Download PDFInfo
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- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- 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
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Abstract
The invention discloses a method, a device and a system for online monitoring of a distribution line, wherein the method for online monitoring of the distribution line comprises the following steps: acquiring power data of fault monitoring points on a distribution line, wherein the power data comprises current data and voltage data; carrying out fault detection according to the power data to obtain a fault detection result; carrying out real-time wave recording on the power data, and outputting transient wave recording data when a fault detection result is that a fault occurs; and analyzing the transient recording data to determine the fault state and the fault occurrence position on the distribution line. The distribution line online monitoring method, device and system disclosed by the embodiment of the invention can acquire more accurate distribution network fault conditions and can also determine the fault occurrence position.
Description
Technical Field
The embodiment of the invention provides a power distribution network technology, and particularly relates to a method, a device and a system for online monitoring of a power distribution line.
Background
Power distribution networks are important components of electrical power systems, and are responsible for distributing and delivering electrical energy. Different from a transmission network, a distribution network extends from a transformer substation to a terminal user, so that the wiring mode of a line is very complex, the field environment is severe, the operation condition is complex, and the probability of failure is very high due to unpredictable human factors, especially an overhead line. Therefore, fault line selection, fault patrol and fault removal in the operation of the power distribution network are common and important production management work faced by power supply enterprises.
For the problem of fault location and troubleshooting of the power distribution network, fault indicators and fault diagnosis systems are most used at present. The fault indicator collects the cable electrical quantity by utilizing the electromagnetic induction principle, and judges whether a line has a fault or not by detecting whether the electrical sudden change exceeds a preset value or not. However, this method only performs state quantity detection, so that a fault occurs, and the fault position cannot be accurately given in time, and the requirement of state monitoring of the modern distribution line cannot be met.
Disclosure of Invention
The invention provides a distribution line online monitoring method, device and system, which can acquire more accurate distribution network fault conditions and can also determine the fault occurrence position.
In a first aspect, an embodiment of the present invention provides an online distribution line monitoring method, including:
acquiring power data of fault monitoring points on a distribution line, wherein the power data comprises current data and voltage data;
carrying out fault detection according to the power data to obtain a fault detection result;
carrying out real-time wave recording on the power data, and outputting transient wave recording data when a fault detection result is that a fault occurs;
and analyzing the transient recording data to determine the fault state and the fault occurrence position on the distribution line.
In a possible implementation manner of the first aspect, acquiring power data of a fault monitoring point on a distribution line includes:
acquiring power data of a fault monitoring point on a distribution line and positioning information of the fault monitoring point;
carry out real-time record ripples to electric power data, when the fault detection result takes place for the trouble, output transient state record ripples data includes:
and carrying out real-time wave recording on the power data, outputting transient wave recording data when a fault detection result is that the fault occurs, and integrating the positioning information into the transient wave recording data.
In a possible implementation manner of the first aspect, the real-time recording is performed on the power data, and when a fault detection result is a fault, the transient recording data is output, including:
and carrying out real-time wave recording on the power data, calling real-time information during wave recording, and outputting transient wave recording data when a fault detection result is that a fault occurs, wherein the transient wave recording data comprises time information.
In a possible implementation manner of the first aspect, analyzing the transient recording data to determine a fault state and a fault occurrence position on the distribution line includes:
the transient recording data of different fault monitoring points are unified into a unified time axis, and the fault state and the fault occurrence position of each fault detection point on the distribution line are determined according to the change characteristics of the transient recording data of the different fault monitoring points.
In a second aspect, an embodiment of the present invention provides an online distribution line monitoring apparatus, including:
the monitoring module is used for acquiring power data of fault monitoring points on the distribution line, wherein the power data comprises current data and voltage data;
the fault diagnosis module is used for carrying out fault detection according to the power data to obtain a fault detection result;
the wave recording module is used for recording the electric power data in real time and outputting transient wave recording data when a fault detection result is that a fault occurs;
and the data transmission module is used for sending the transient recording data to the distribution line fault analysis device so as to enable the distribution line fault analysis device to analyze the transient recording data and determine the fault state and the fault occurrence position on the distribution line.
In a possible implementation manner of the second aspect, the online distribution line monitoring apparatus further includes:
the positioning module is used for acquiring positioning information of a fault detection point on the distribution line;
and the wave recording module is specifically used for recording the electric power data in real time, outputting the transient wave recording data when the fault detection result is that the fault occurs, and integrating the positioning information into the transient wave recording data.
In a possible implementation manner of the second aspect, the online distribution line monitoring apparatus further includes:
the timing module is used for providing real-time information;
the wave recording module is specifically used for recording the electric power data in real time, calling real-time information during wave recording, and outputting transient wave recording data when a fault detection result is that a fault occurs, wherein the transient wave recording data comprises the time information.
In a possible implementation manner of the second aspect, the monitoring module includes a current collecting unit and a voltage collecting unit;
the current acquisition unit is used for acquiring current data of fault monitoring points on the distribution line;
the voltage acquisition unit is used for acquiring voltage data of a fault monitoring point on the distribution line;
the fault diagnosis module comprises a current detection unit and a voltage detection unit;
the current detection unit is used for carrying out short-circuit fault detection according to the current data of the fault monitoring point to obtain a short-circuit fault detection result;
and the voltage detection unit is used for carrying out ground fault detection according to the voltage data of the fault monitoring point to obtain a ground fault detection result.
In a third aspect, an embodiment of the present invention provides an apparatus for analyzing a fault of a distribution line, including:
the data receiving module is used for receiving transient wave recording data sent by the distribution line online monitoring device, and the transient wave recording data are obtained by recording electric power data in real time when the distribution line online monitoring device detects that a fault occurs on the distribution line;
and the fault analysis module is used for analyzing the transient recording data and determining the fault state and the fault occurrence position on the distribution line.
In a fourth aspect, an embodiment of the present invention provides a distribution line fault analysis system, including:
the on-line distribution line monitoring device shown in any one of the possible implementation manners of the second aspect and the distribution line fault analysis device shown in any one of the possible implementation manners of the third aspect.
According to the distribution line online monitoring method, device and system provided by the embodiment of the invention, the power data of the fault monitoring point on the distribution line is acquired, then fault detection is carried out according to the power data to obtain a fault detection result, the power data is subjected to real-time wave recording, and when the fault detection result is that a fault occurs, the transient wave recording data is output, so that the transient wave recording data can be analyzed, the fault state and the fault occurrence position on the distribution line can be determined, more accurate fault conditions can be obtained, the fault occurrence position can also be determined, and therefore, a power distribution network maintainer can more quickly solve the fault of the power distribution network.
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Fig. 1 is a flowchart of an online distribution line monitoring method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an online distribution line monitoring device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another distribution line on-line monitoring device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a distribution line fault analysis apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a distribution line fault analysis system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a distribution line online monitoring method according to an embodiment of the present invention, and as shown in fig. 1, the distribution line online monitoring method according to the embodiment includes:
step S101, collecting power data of fault monitoring points on the distribution line, wherein the power data comprises current data and voltage data.
The distribution line online monitoring method provided by the embodiment is used for carrying out online monitoring on the fault of the distribution line in real time so as to accurately analyze the fault of the distribution line. Firstly, a plurality of fault monitoring points are arranged on a distribution line, and the deployment position of each fault monitoring point is determined according to the connection condition of a distribution network. Generally, fault monitoring points are deployed on important devices or important lines in a power distribution network.
Be provided with fault indicator on the fault monitoring point, fault indicator utilizes the electromagnetic induction principle, gathers cable electric quantity, promptly gathers the electric power data of fault monitoring point on the distribution lines. Wherein the power data includes current data and voltage data, then correspondingly, be provided with the corresponding device that is used for gathering current data and voltage data on the fault monitoring point. Wherein the current data may be three-phase current signals and the voltage data may be three-phase voltage signals.
Can set up a plurality of trouble monitoring points on the distribution lines, each trouble monitoring point all is provided with the corresponding device that is used for gathering electric power data, can carry out real-time collection to the electric power data of a plurality of trouble monitoring points simultaneously.
And S102, carrying out fault detection according to the power data to obtain a fault detection result.
After the power data of the fault monitoring point is acquired on the distribution line, fault detection is carried out on the power data, and whether a fault exists at the fault monitoring point is determined. The fault detection of the power data can be realized by setting power data threshold values of fault monitoring points and then judging whether the acquired power data exceed a preset power data threshold value. If the collected power data exceed the preset power data threshold, it can be determined that a fault occurs at a fault monitoring point of the power distribution network.
Since the power data comprises current data or voltage data, fault detection may be performed based on the current data and the voltage data, respectively. Wherein, the short-circuit fault detection is carried out according to the current signal of the fault monitoring point, and the short-circuit fault detection result can be output. And carrying out ground fault detection according to the voltage signal of the fault monitoring point, and outputting a ground fault detection result.
And step S103, carrying out real-time wave recording on the power data, and outputting transient wave recording data when the fault detection result is that the fault occurs.
The traditional on-line monitoring of the distribution line only collects power data on the distribution line, judges whether a fault exists according to the collected power data, and determines that the distribution line has the fault if the fault exists. However, the method only records the fault state, only can reflect the fault event of the power distribution network, and cannot accurately reflect the fault position and the fault details of the power distribution network.
Therefore, in this embodiment, the power data on the distribution line is also recorded in real time, that is, the change of the power data on the distribution line is recorded in real time. And after the electric power data of the fault monitoring points on the distribution line are collected and detected, outputting transient recording data when the fault is determined to occur. The transient recording data refers to recording data within a certain time range when the power data is detected to determine that a fault occurs.
Since the power data includes current data and voltage data, the transient recording data also includes transient current recording data and transient voltage recording data.
When the power data are recorded, the acquired power data can be firstly cached, and then when the fault detection result indicates that a fault occurs, continuous power data with fixed time duration taking the fault occurrence time as a central time are obtained from the cache according to the fault occurrence time and serve as transient recording data to be output. Thus, when the transient recording data are analyzed, the analysis can be performed according to the recording data before, during and after the occurrence of the fault, and a corresponding analysis result can be obtained.
And step S104, analyzing the transient recording data, and determining the fault state and the fault occurrence position on the distribution line.
After the transient recording data are obtained, the transient recording data can be analyzed and processed, so that the accurate fault state and fault occurrence position on the distribution line can be determined. The on-line monitoring method for the distribution line, provided by the embodiment, is used for outputting the transient recording data when the fault is determined after the collected power data are detected, and the transient recording data record the power data in a certain time range nearby when the fault occurs, so that a more detailed fault state can be determined by analyzing the transient recording data, and the fault occurrence position can be predicted by analyzing the transient recording data. Compared with the traditional distribution line monitoring method, the distribution line online monitoring method provided by the embodiment can acquire more accurate fault conditions and can also determine the fault occurrence position, so that power distribution network managers can perform corresponding fault elimination according to fault detection results, and the efficiency of power distribution network fault detection is improved. By means of the real-time monitoring mode, the local fault detection mode and the remote fault positioning mode are combined, the power transmission line can be monitored in an all-around mode, and the reliability of power transmission line state monitoring is improved.
The analysis of the transient recording data can be realized by fault location processing of the distribution line fault according to the transient recording data corresponding to the plurality of fault monitoring points and outputting a fault location result. In one scenario, a plurality of transient recording data can be unified into a unified time axis according to transient recording data acquired from different fault monitoring points, and then the specific position of a fault is predicted according to the change characteristics of the transient. In another scenario, the fault type can be further analyzed and confirmed based on a trained recognition model according to transient recording data acquired from different fault monitoring points, so that the fault detection accuracy is further improved. In addition, interaction of various data can be realized through a wireless transmission mode for cloud service-based construction.
The distribution lines on-line monitoring method that this embodiment provided, through the electric power data of gathering the trouble monitoring point on the distribution lines, then carry out fault detection according to electric power data, obtain the fault detection result, and carry out real-time oscillography to electric power data, when the fault detection result takes place for the trouble, output transient state oscillography data, thereby can carry out the analysis to transient state oscillography data, confirm fault status and the fault occurrence position on the distribution lines, can acquire more accurate fault situation, and also can determine the fault occurrence position, thereby can make the distribution network maintainer solve the trouble of distribution network more fast.
Furthermore, a positioning module can be arranged at the fault monitoring point on the distribution line, and the positioning module can acquire accurate positioning information of the fault monitoring point. Then the electric power data of the fault monitoring point on the distribution line and the positioning information of the fault monitoring point can be simultaneously acquired. And then, carrying out real-time wave recording on the power data, and integrating the transient wave recording data into the output transient wave recording data when the fault detection result is that the fault occurs. That is, the accurate positioning information of the fault monitoring point is integrated into the transient recording data, so that the fault position in the distribution line can be more accurately determined when the transient recording data is analyzed.
Furthermore, a timing module can be arranged at a fault monitoring point on the distribution line, and the timing module is used for providing real-time information. When the electric power data are recorded in real time, real-time information can be called, and when a fault detection result is that a fault occurs, the output transient recording data comprise time information. When distribution lines broke down, generally can not only detect the trouble at a fault monitoring point and take place, and the time that a plurality of fault monitoring points detected the trouble and take place probably is different, through time and the fault state to a plurality of fault monitoring points time and the fault state of breaking down, can analyze out more accurate, detailed comprehensive trouble, and can further improve the position that the trouble took place.
In the process of recording the electric power data in real time, the accuracy requirement of the time information corresponding to the electric power data is strict, comprehensive analysis is facilitated to be carried out on the recording data collected according to different fault monitoring points, and the position information of faults is analyzed according to the corresponding relation between the recording data and the time. Therefore, the timing module is arranged, time information can be uniformly acquired, the electric power data and the acquisition time correspond to each other in the process of forming the recording data, and the time uniformity of the recording data acquired by each fault monitoring point is guaranteed. Meanwhile, the positioning module binds the recording data with the corresponding fault monitoring points through the positioning information and can judge the position information of the fault monitoring points corresponding to the recording data according to the positioning information, so that a foundation is laid for analyzing the fault positioning information of the power transmission line according to the transient recording data.
In an embodiment, when the power data is the current data, the current data may be conditioned after the current data is acquired, and then the conditioned current data is subjected to analog-to-digital conversion to obtain the digital current data. And then, acquiring an instantaneous current value according to the digital current data, and judging that a short-circuit fault exists when the instantaneous current value is greater than a preset current threshold value.
In addition, after the digital current data is acquired, the digital current signal may be subjected to a filtering process. Wherein the filtering process includes: and carrying out wavelet packet decomposition processing on the digital current data to obtain a wavelet packet coefficient of the digital current data. And then, carrying out enhancement processing according to the obtained wavelet packet coefficient, wherein the adopted enhancement processing function is as follows:
wherein b' (i, j) represents the ith layer jth wavelet packet coefficient after enhancement processing, b (i, j) represents the ith layer jth wavelet packet coefficient, Z1And Z2Sgn (-) represents a sign function for each set threshold.
And finally, reconstructing according to the wavelet packet coefficient after the enhancement processing to obtain current data after the filtering processing.
Fig. 2 is a schematic structural diagram of an online distribution line monitoring device according to an embodiment of the present invention, and as shown in fig. 2, the online distribution line monitoring device according to this embodiment includes:
and the monitoring module 21 is used for acquiring power data of the fault monitoring point on the distribution line, wherein the power data comprises current data and voltage data.
And the fault diagnosis module 22 is used for carrying out fault detection according to the power data to obtain a fault detection result.
And the wave recording module 23 is configured to record the power data in real time, and output the transient wave recording data when the fault detection result indicates that a fault occurs.
And the data transmission module 24 is used for sending the transient recording data to the distribution line fault analysis device so that the distribution line fault analysis device analyzes the transient recording data and determines the fault state and the fault occurrence position on the distribution line.
Through set up monitoring module 21 in the trouble monitoring point of distribution lines, gather the electric power data of trouble monitoring point position, and carry out fault detection to the electric power data who gathers through setting up at trouble monitoring point local failure diagnosis module 22, when detecting that transmission line has electric power failure, then through record ripples module 23 according to the electric power data output transient state record ripples data that the trouble took place moment and correspond, and send transient state record ripples data to distribution lines fault analysis device through data transmission module 24, carry out further analysis by distribution lines fault analysis device according to transient state record ripples data, predict the trouble position of taking place. The distribution line on-line monitoring device can monitor the power transmission line in an all-around manner by combining a real-time monitoring manner with a remote fault positioning manner through local fault detection, and improves the reliability of power transmission line state monitoring. When the on-line monitoring device of the distribution line detects that a fault occurs, corresponding fault information is sent to the fault analysis device of the distribution line, and a manager can perform corresponding fault elimination according to the fault detection result.
Fig. 3 is a schematic structural diagram of another distribution line on-line monitoring device according to an embodiment of the present invention, and as shown in fig. 3, the distribution line on-line monitoring device according to this embodiment further includes, on the basis of fig. 2:
the positioning module 25 is used for acquiring positioning information of a fault detection point on the distribution line; the wave recording module 23 is specifically configured to record the power data in real time, output the transient wave recording data when the fault detection result indicates that a fault occurs, and integrate the positioning information into the transient wave recording data. The positioning module 25 binds the recording data sent by the on-line distribution line monitoring device with the corresponding fault monitoring point through the positioning information, so that the distribution line fault analysis device can judge the position information of the fault monitoring point corresponding to the received recording data according to the positioning information, and a foundation is laid for the distribution line fault analysis device to analyze the transmission line fault positioning information according to the transient recording data.
Optionally, the distribution line online monitoring device further includes a timing module 26, configured to provide real-time information; the wave recording module 23 is specifically configured to record the power data in real time, call real-time information during wave recording, and output transient wave recording data when a fault detection result indicates that a fault occurs, where the transient wave recording data includes time information. In the process of carrying out real-time road wave to electric power data at record module 23, its accuracy requirement to the time information that electric power data corresponds is comparatively strict, helps distribution lines fault analysis device to carry out the integrated analysis according to the record wave data of different trouble monitoring point collections, according to the corresponding relation of record wave data and time to the positional information who finds out the trouble of analysis. Therefore, the distribution line on-line monitoring device is further provided with the timing module 26, which can uniformly acquire time information, and is helpful for the recording module 23 to correspond the electric power data to the acquisition time in the process of forming the recording data, so as to ensure the time uniformity of the recording data acquired by each fault detection node.
In one embodiment, the monitoring module 21 includes a current collecting unit and a voltage collecting unit; the current acquisition unit is used for acquiring current data of fault monitoring points on the distribution line; the voltage acquisition unit is used for acquiring voltage data of the fault monitoring point on the distribution line. The fault diagnosis module 22 includes a current detection unit and a voltage detection unit; the current detection unit is used for carrying out short-circuit fault detection according to the current data of the fault monitoring point to obtain a short-circuit fault detection result; and the voltage detection unit is used for carrying out ground fault detection according to the voltage data of the fault monitoring point to obtain a ground fault detection result.
In one embodiment, the wave recording module 23 includes a buffer unit and a transient wave recording unit; the cache unit is used for caching the power data acquired by the monitoring module 21; the transient recording unit is configured to, when the fault diagnosis module 22 detects that a fault occurs, obtain, as transient recording data, continuous power data of a fixed duration with the fault occurrence time as a center time from the cache unit according to the fault occurrence time, and output the data. In the real-time recording process of the recording module 23, the recording data acquired in real time is stored in the cache unit; when a fault is detected, according to the wave recording data in the cache unit, the fault occurrence time is taken as the central time, the wave recording data in a certain continuous time period is obtained to be used as transient wave recording data, and the transient wave recording data is sent to the distribution line fault analysis device. Help and distribute electric lines fault analysis device can be according to the fault before taking place, during the fault takes place and the recording data after the fault takes place analyzes, acquires corresponding analysis result.
In one embodiment, the current detection unit includes: the signal conditioning subunit is used for conditioning the current signal of the fault monitoring point and outputting the conditioned current signal; the analog-to-digital conversion subunit is used for performing analog-to-digital conversion on the conditioned current signal to obtain a digital current signal; and the short-circuit detection subunit is used for acquiring an instantaneous current value according to the digital current signal, and judging that a short-circuit fault exists when the instantaneous current value is greater than a set threshold value.
In an embodiment, the current detection unit further includes a filtering unit, and the filtering unit is configured to perform filtering processing on the digital current signal and output the filtered current signal to the short circuit detection subunit. In one scenario, the filtering unit is specifically configured to:
1) carrying out wavelet packet decomposition processing on the digital current signal to obtain a wavelet packet coefficient of the digital current signal;
2) and performing enhancement processing according to the obtained wavelet packet coefficient, wherein the adopted enhancement processing function is as follows:
wherein b' (i, j) represents the ith layer jth wavelet packet coefficient after enhancement processing, b (i, j) represents the ith layer jth wavelet packet coefficient, Z1And Z2Sgn (-) represents a sign function for each set threshold.
3) And reconstructing according to the wavelet packet coefficient after the enhancement processing to obtain the current signal after the filtering processing.
Fig. 4 is a schematic structural diagram of a distribution line fault analysis apparatus according to an embodiment of the present invention, and as shown in fig. 4, the distribution line fault analysis apparatus according to the embodiment includes:
the data receiving module 41 is configured to receive transient wave recording data sent by the distribution line online monitoring device, where the transient wave recording data is obtained by recording a wave of the power data in real time when the distribution line online monitoring device detects that a fault occurs on the distribution line.
And the fault analysis module 42 is used for analyzing the transient recording data and determining the fault state and the fault occurrence position on the distribution line.
Wherein the distribution line on-line monitoring device comprises the distribution line on-line monitoring device shown in fig. 2 or fig. 3. And the distribution line fault analysis device carries out fault positioning processing on the distribution line fault according to the transient recording data sent by the distribution line on-line monitoring devices corresponding to the plurality of fault monitoring points, and outputs a fault positioning result.
In a scene, distribution lines fault analysis device can unify a plurality of transient state record data to unified time axis according to the transient state record data that different fault monitoring points obtained, then predicts the concrete position that the trouble took place according to the change characteristic of transient state.
In another scenario, the distribution line fault analysis device can further analyze and confirm the fault type based on a trained recognition model according to transient recording data acquired by different fault monitoring points, so that the fault detection accuracy is further improved.
In one scenario, the distribution line fault analysis device can be built based on cloud services, and data interaction is achieved with each online monitoring device in a wireless transmission mode.
Fig. 5 is a schematic structural diagram of a distribution line fault analysis system according to an embodiment of the present invention, and as shown in fig. 5, the distribution line fault analysis system according to this embodiment includes:
a distribution line on-line monitoring device 51 and a distribution line fault analysis device 52.
The number of the distribution line on-line monitoring devices 51 may be plural, and each distribution line on-line monitoring device 51 may be any one of the distribution line on-line monitoring devices shown in fig. 2 or fig. 3. The distribution line fault analysis device 52 may be the distribution line fault analysis device shown in fig. 4.
It should be noted that, functional units/modules in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules are integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of software functional units/modules.
From the above description of embodiments, it is clear for a person skilled in the art that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For a hardware implementation, a processor may be implemented in one or more of the following units: an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, some or all of the procedures of an embodiment may be performed by a computer program instructing associated hardware. In practice, the program may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An online distribution line monitoring method is characterized by comprising the following steps:
acquiring power data of a fault monitoring point on a distribution line, wherein the power data comprises current data and voltage data;
performing fault detection according to the power data to obtain a fault detection result;
carrying out real-time wave recording on the power data, and outputting transient wave recording data when the fault detection result is that a fault occurs;
and analyzing the transient recording data to determine the fault state and the fault occurrence position on the distribution line.
2. The method of claim 1, wherein collecting power data for a fault monitoring point on the distribution line comprises:
acquiring power data of a fault monitoring point on a distribution line and positioning information of the fault monitoring point;
the said real-time recording of the said electric data, when the said trouble detection result is the trouble takes place, output the transient state recording data, include:
and carrying out real-time wave recording on the electric power data, outputting transient wave recording data when the fault detection result is that a fault occurs, and integrating the positioning information into the transient wave recording data.
3. The method of claim 1, wherein the recording the power data in real time, and outputting transient recording data when the fault detection result is a fault occurrence, comprises:
and carrying out real-time wave recording on the power data, calling real-time information during wave recording, and outputting transient wave recording data when the fault detection result is that a fault occurs, wherein the transient wave recording data comprises time information.
4. The method according to any one of claims 1 to 3, wherein the analyzing the transient recording data to determine the fault status and the fault occurrence location on the distribution line comprises:
and unifying the transient recording data of different fault monitoring points into a unified time axis, and determining the fault state and the fault occurrence position of each fault detection point on the distribution line according to the change characteristics of the transient recording data of different fault monitoring points.
5. An on-line distribution line monitoring device, comprising:
the monitoring module is used for acquiring power data of fault monitoring points on the distribution line, wherein the power data comprises current data and voltage data;
the fault diagnosis module is used for carrying out fault detection according to the power data to obtain a fault detection result;
the wave recording module is used for recording the electric power data in real time and outputting transient wave recording data when the fault detection result is that a fault occurs;
and the data transmission module is used for transmitting the transient recording data to a distribution line fault analysis device so as to enable the distribution line fault analysis device to analyze the transient recording data and determine the fault state and the fault occurrence position on the distribution line.
6. The apparatus of claim 5, further comprising:
the positioning module is used for acquiring positioning information of a fault detection point on the distribution line;
the wave recording module is specifically configured to record the power data in real time, output transient wave recording data when the fault detection result indicates that a fault occurs, and integrate the positioning information into the transient wave recording data.
7. The apparatus of claim 5, further comprising:
the timing module is used for providing real-time information;
the wave recording module is specifically used for recording the electric power data in real time, calling real-time information during wave recording, and outputting transient wave recording data when the fault detection result is that a fault occurs, wherein the transient wave recording data comprises time information.
8. The device of claim 5, wherein the monitoring module comprises a current collection unit and a voltage collection unit;
the current acquisition unit is used for acquiring current data of fault monitoring points on the distribution line;
the voltage acquisition unit is used for acquiring voltage data of a fault monitoring point on the distribution line;
the fault diagnosis module comprises a current detection unit and a voltage detection unit;
the current detection unit is used for detecting short-circuit faults according to the current data of the fault monitoring points to obtain short-circuit fault detection results;
and the voltage detection unit is used for carrying out ground fault detection according to the voltage data of the fault monitoring point to obtain a ground fault detection result.
9. An apparatus for analyzing a fault of a distribution line, comprising:
the data receiving module is used for receiving transient wave recording data sent by the distribution line online monitoring device, wherein the transient wave recording data are obtained by recording electric power data in real time when the distribution line online monitoring device detects that a fault occurs on a distribution line;
and the fault analysis module is used for analyzing the transient recording data and determining the fault state and the fault occurrence position on the distribution line.
10. A distribution line fault analysis system, comprising:
an on-line distribution line monitoring apparatus according to any one of claims 5 to 8 and a distribution line fault analysis apparatus according to claim 9.
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