CN113541316B - Data acquisition and positioning monitoring system and method for rapid power grid rush repair - Google Patents
Data acquisition and positioning monitoring system and method for rapid power grid rush repair Download PDFInfo
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- CN113541316B CN113541316B CN202110840462.4A CN202110840462A CN113541316B CN 113541316 B CN113541316 B CN 113541316B CN 202110840462 A CN202110840462 A CN 202110840462A CN 113541316 B CN113541316 B CN 113541316B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims abstract description 26
- 238000004458 analytical method Methods 0.000 claims description 33
- 239000011159 matrix material Substances 0.000 claims description 19
- 230000003321 amplification Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention provides a data acquisition and positioning monitoring system and method for quick emergency repair of a power grid. According to the invention, the data acquisition module is used for acquiring information of the power grid, and the monitoring module is used for monitoring real-time information of the power grid; and then the core processing module analyzes and processes the acquired information to accurately obtain the type and the occurrence area of the fault, and the wireless communication module is arranged to send the information to corresponding personnel, so that the power grid can be better maintained, and the working efficiency of maintaining and overhauling the power grid is improved.
Description
Technical Field
The invention belongs to the field of monitoring systems, and particularly relates to a data acquisition and positioning monitoring system and method for rapid power grid rush repair.
Background
In the existing life, the whole body formed by power transformation stations and power transmission and distribution lines of various voltages in a power system is called a power network, and comprises three units of power transformation, power transmission and power distribution, wherein the power network is used for transmitting and distributing electric energy and changing the voltage, and the problem that the fault point is difficult to locate is still existed although the safety management work of a power distribution network is continuously perfected in China.
Because the neutral point grounding mode is adopted in the power distribution network in most areas in China at present, once the power distribution network fails, a manual searching mode is needed, and the workload is greatly increased; and also make the rush-repair work unable to develop in time, influenced the stability of distribution network itself.
If the power grid faults are not handled in time, the most common and dangerous faults are short circuits in various forms, wherein single-phase grounding short circuits are the most, and three-phase short circuits are fewer; inter-turn shorting of windings may also occur for rotating electrical machines and transformers; in addition, the transmission line can sometimes have disconnection faults and non-full-phase operation in the ultra-high voltage power grid; or complex faults of the power grid occur at the same time, and the voltage of partial areas of the power grid is greatly reduced as a result of the faults, so that the normal operation of the majority of users is destroyed.
Meanwhile, the most important load in the power supply system is an asynchronous motor, the electromagnetic torque of the asynchronous motor is in direct proportion to the square of the terminal voltage of the asynchronous motor, when the voltage is reduced, the electromagnetic torque is obviously reduced, when the working voltage of the electric equipment is once reduced to 40% of the rated voltage, the motor stops running, so that serious consequences such as product scrapping and equipment damage are caused, and a short circuit point passes through a large short circuit current, so that large mechanical stress among conductors can be caused, and if the conductors and supports thereof are not firm enough, the conductors and supports thereof can be damaged; meanwhile, the electric arc of the short-circuit point can burn out electrical equipment, fault equipment and certain fault-free equipment in a power grid, large electric force and high temperature are generated when large short-circuit current passes through the electric power grid, when the short-circuit duration is long, the equipment can be damaged or damaged, the service life is shortened, the stability of parallel operation of units among power plants in the power system is damaged, the units generate oscillation, the whole power system can be even broken down when serious, the serious interference is generated on nearby communication lines or railway automatic blocking signals when the power grid is short-circuited, and the life quality of vast residents is greatly influenced.
However, in the prior art, the fault positioning and monitoring system has the defects in accuracy and positioning speed, and the efficiency of power distribution network maintenance work has a larger lifting space.
Disclosure of Invention
The invention aims to solve the technical problem of providing a data acquisition and positioning monitoring system for quick power grid rush repair and a use method thereof, which can quickly position fault points so as to improve the working efficiency of maintenance and repair on a power grid.
In order to solve the technical problems, the technical scheme adopted by the invention is that as one aspect of the invention, a data acquisition and positioning monitoring system for quick rush repair of a power grid is provided, which comprises a core processing module, and a data acquisition module, a wireless communication module, a monitoring module and a power supply module which are electrically connected with the core processing module;
the data acquisition module is used for acquiring power data on the power line and converting the power data into digital power signals; the power data includes current data and voltage data;
the monitoring module is used for monitoring the power line through the sensor equipment so as to obtain monitoring data;
the core processing module is used for receiving the digital power signals from the data acquisition module, performing fault analysis and obtaining corresponding fault types and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module to obtain a preliminary analysis result;
the wireless communication module is used for sending the fault type and the fault area information from the core processing module and the monitoring data or/and the primary analysis result from the monitoring module to the corresponding receiving object so as to remind corresponding personnel to perform fault quick repair arrangement processing;
the power module is used for providing power supply for the modules.
Preferably, the data acquisition module further comprises:
the weak current information acquisition unit is used for acquiring a voltage parameter and a weak current signal corresponding to the current parameter on the power line through a voltage transformer and a current transformer;
the signal detection and amplification unit is used for detecting and amplifying the weak current signal through the precision detector;
the dividing multiplication processing unit is used for multiplying the voltage electric signal and the current electric signal in the weak electric signal which are detected and amplified by the signal detection amplification unit, and separating the voltage electric signal and the current electric signal at a preset time interval to form a corresponding frequency signal;
and the AD converter is used for carrying out AD conversion on the data obtained by the division multiplication processing unit to form a corresponding digital signal.
Preferably, the core processing module further comprises:
the fault type identification unit is used for identifying the fault type of the digital signal from the data acquisition module, and the fault type comprises the following steps: short circuit fault, ground fault and open circuit fault;
the fault position identification unit is used for carrying out logic operation on the fault information arrangement matrix by adopting a matrix algorithm capable of realizing rapid positioning improvement of the fault section, and identifying a specific fault position.
Preferably, the wireless communication module notifies a preset related staff of the fault type and the fault position of the short message and displays the short message on a monitoring master station interface, the monitoring master station is communicated with an expert rush-repair management system, and system software of a monitoring center guides a rush-repair staff to realize quick rush-repair of the fault according to a standard rush-repair flow, so that quick rush-repair after the fault and power supply recovery are realized.
Preferably, the power supply module adopts a power supply mode of combining an alternating current conversion unit with a storage battery, wherein the alternating current conversion unit receives external alternating current, converts the external alternating current into direct current voltage after rectification and filtering, and converts the direct current voltage into stable +24V voltage through a voltage stabilizing module; when the circuit is normal, the power supply module supplies power to each module through the converter on one hand and charges the storage battery on the other hand; when the circuit is out of power, the storage battery supplies power to the terminal through the converter.
Preferably, the system further comprises a data terminal in communication with the core processing module, and the data terminal is used for receiving the power grid state information from the monitoring module and the preliminary analysis result obtained by the core processing module, generating a control instruction according to the preliminary analysis result, and sending out the control instruction through the wireless communication module.
As another aspect of the present invention, there is also provided a data acquisition and location monitoring method for rapid emergency repair of a power grid, which is implemented by the foregoing system, the method including the steps of:
step S10, the data acquisition module acquires the power data on the power line and converts the power data into a digital power signal; wherein the power data includes current data and voltage data;
step S11, the monitoring module monitors the power line through the sensor equipment to obtain monitoring data;
step S12, the core processing module receives the digital power signal from the data acquisition module, performs fault analysis, and obtains corresponding fault type and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module to obtain a preliminary analysis result;
and step S13, the wireless communication module sends the fault type and the fault area information from the core processing module, and the monitoring data or/and the primary analysis result from the monitoring module to the corresponding receiving object, and sends the monitoring data or/and the primary analysis result to the corresponding receiving object so as to remind corresponding personnel to perform fault quick repair arrangement processing.
Preferably, the step S10 further includes:
obtaining a weak current signal corresponding to a voltage parameter and a current parameter on a power line through a voltage transformer and a current transformer;
detecting and amplifying the weak current signal through a precision detector;
multiplying the voltage electric signal and the current electric signal in the weak electric signal after detection and amplification treatment by the signal detection and amplification unit, and separating the signals at preset time intervals to form corresponding frequency signals;
and carrying out AD conversion on the data obtained by the division multiplication processing unit to form a corresponding digital signal.
Preferably, the step S12 further includes:
performing fault type identification on the digital signal from the data acquisition module, wherein the fault type comprises the following steps: short circuit fault, ground fault and open circuit fault;
and (3) performing logic operation on the fault information arranging matrix by adopting a matrix algorithm capable of realizing rapid positioning improvement of the fault section, and identifying a specific fault position.
Preferably, the step S13 specifically includes:
the wireless communication module informs preset related staff of fault types and fault positions through short messages and displays the fault types and the fault positions through short messages on a monitoring master station interface, the monitoring master station is communicated with an expert rush-repair management system, and system software of a monitoring center guides rush-repair staff to realize rapid rush-repair of faults according to standard rush-repair processes, so that rapid rush-repair after the faults and power supply recovery are realized.
The implementation of the invention has the following beneficial effects:
the invention provides a data acquisition and positioning monitoring system and method for quick emergency repair of a power grid; information of the power grid is acquired through the data acquisition module, the data acquisition module is arranged to acquire the information, the wireless communication module is arranged to stably convey the information, the monitoring module is arranged to monitor the real-time information of the power grid, the power supply module is arranged to supply power to each module, the core processing module is arranged to analyze and process the acquired information, the fault type and the fault area on the power line are scientifically determined, and related personnel can be informed to better maintain and overhaul the power grid, so that the efficiency of power distribution network maintenance work is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that it is within the scope of the invention to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of an embodiment of a data acquisition and positioning monitoring system for rapid power grid repair according to the present invention;
FIG. 2 is a schematic diagram of a data acquisition module in FIG. 1;
FIG. 3 is a schematic diagram of the core processing module of FIG. 1;
fig. 4 is a schematic flow chart of an embodiment of a data acquisition and positioning monitoring method for rapid power grid rush repair according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, a schematic structural diagram of an embodiment of a data acquisition and positioning monitoring system for rapid power grid rush repair according to the present invention is provided; referring to fig. 2 and fig. 3 together, in this embodiment, the data acquisition and positioning monitoring system 1 for rapid power grid repair includes a core processing module 11, and a data acquisition module 10, a wireless communication module 13, a monitoring module 11, a power module 14 and a data terminal 15 electrically connected to the core processing module 11;
the data acquisition module 10 is used for acquiring power data on a power line and converting the power data into a digital power signal; the power data includes current data and voltage data, which may be transmitted to the core processing module 12 by wired or wireless means;
the monitoring module 11 is used for monitoring the power line through the sensor equipment to obtain monitoring data;
the core processing module 12 is configured to receive the digital power signal from the data acquisition module 10, perform fault analysis, and obtain a corresponding fault type and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module 11 to obtain a preliminary analysis result;
the wireless communication module 13 is configured to send the fault type and the fault area information from the core processing module 12, and the monitoring data or/and the preliminary analysis result from the monitoring module 11 to a corresponding receiving object, so as to remind a corresponding person to perform fault quick repair arrangement processing;
the power module 14 is used for providing power supply for the above modules.
Specifically, in one example, the data acquisition module 10 further includes:
the weak current information acquisition unit 100 is used for acquiring a voltage parameter and a weak current signal corresponding to the current parameter on the power line through a voltage transformer and a current transformer;
a signal detection and amplification unit 101 for detecting and amplifying the weak current signal by a precision detector; in one example of the present invention, the precision detector is a precision detector formed by an operational amplifier, and since the open loop gain Gol of the operational amplifier is high, when the input signal is positive, as long as Usr is equal to or greater than UD/Gol, the diode is turned on, and once the diode is turned on, the amplifier is in a deep closed loop state, the nonlinear distortion is very small, and from a small signal, there is a good linear relationship between the input and the output. Its dead band voltage is very small, equal to 1/Gol times the forward voltage drop UD of the diode. When the diode is conducted, the feedback coefficient of the detector is F, the internal resistance and the temperature coefficient of the precision detector are 1/(Gol.F) times of those of a common detector, and when R2 is more than R1, the detector also has the voltage amplification function, can amplify the signal by R2/R1 times, and can amplify and then transmit the weak point signal;
a division multiplication processing unit 102 for multiplying the voltage electric signal and the current electric signal in the weak electric signal after the detection and amplification processing by the signal detection amplification unit, and performing separation processing at a predetermined time interval to form a corresponding frequency signal; in the invention, the principle of the split multiplication processing unit can be that a split multiplier is adopted, after the voltage to be detected and a current signal are converted into alternating voltage signals through a mutual inductor to be multiplied, then the alternating voltage signals are split at a certain time interval delta t, the delta t is small, so that the input voltage can be regarded as direct current in the period, the multiplier multiplies each t divided by the moment to obtain an operation result, u (t) and i (t) are input into the multiplier to be multiplied according to a power expression p (t) =u (t) i (t), an analog voltage E0 which is in direct proportion to the power p is obtained, the voltage is converted into frequency through a V-F converter, N is counted in the delta t through a frequency meter, the result output by the multiplier is the average value of instant products because the delta t is small, the operation of the instant product is realized, and the instant power p (t) is output after the weak point signal is amplified, and the power voltage value is converted into a frequency signal which is in direct proportion to the signal pulse through a low-pass filter;
and an AD converter 103 for AD-converting the data obtained by the division multiplication processing unit to form a corresponding digital signal.
Specifically, in one example, the core processing module 12 further includes:
the fault type identifying unit 120 is configured to identify a fault type of the digital signal from the data acquisition module, where the fault type includes: short circuit fault, ground fault and open circuit fault;
in a specific example, the fault type identification unit adopts an overcurrent breaking method to judge the short-circuit fault, and can judge whether the system has the short-circuit fault or not by judging whether the current on the line is larger than a setting value, and when the short-circuit fault occurs, the current on the line is larger than the setting value; judging the grounding fault by adopting a full current method; the full current measurement method is adopted to measure the existence of voltage and no current so as to judge whether the line has a broken line fault, and when the line has the broken line fault, the line before the fault point shows that the voltage value is basically maintained normal and almost no current is output; the line voltage and current are not output after the fault point, whether the disconnection fault occurs can be judged through the difference before and after the fault point, and when the fault occurs, the data acquisition module sends fault information to the core processing module in a GPRS wireless transmission mode;
the fault location identifying unit 121 is configured to perform a logic operation on the fault information arranging matrix by using a matrix algorithm capable of implementing rapid positioning improvement of the fault section, so as to identify a specific fault location.
Specifically, in one example, the fault location identifying unit 121 in the core processing module may use a matrix algorithm capable of implementing rapid positioning improvement of a fault section, generate a power distribution network model according to data simulation obtained from the data acquisition module unit, set nodes in the power distribution network model, number the nodes according to a set sequence, and divide the power distribution network model line into sections with the nodes being limiting limits, and define the power distribution network model line model as: qk= { I, II, III … n … }, obtaining fault current of each node when a distribution line fails, generating a distribution network fault information matrix G, obtaining a distribution network line model Qk, wherein qk= { I, II, III … n … }, obtaining a distribution network description matrix square matrix D, obtaining a distribution network fault information matrix G, calculating fault overcurrent degree Mk of each section of the distribution network, wherein Mk is the fault overcurrent degree of the kth section Qk divided by the distribution network, obtaining the calculated fault overcurrent degree Mk of each section, finding the distribution network section Qk with the fault overcurrent degree mk=1, positioning the distribution network section Qk as a fault section, and obtaining the fault section, thereby realizing accurate positioning of the fault section.
Specifically, the wireless communication module 13 notifies a preset related staff of the fault type and the fault position short message and displays the short message on a monitoring master station interface, the monitoring master station is communicated with the expert rush-repair management system, and system software of a monitoring center guides the rush-repair staff to realize quick rush-repair of the fault according to a standard rush-repair flow, so that quick rush-repair and power supply recovery after the fault are realized.
Specifically, the power module 14 adopts a power supply mode of combining an ac conversion unit with a storage battery, wherein the ac conversion unit receives external ac power, and converts the external ac power into dc voltage after rectifying and filtering, and then converts the dc voltage into stable +24v voltage through a voltage stabilizing module; when the circuit is normal, the power supply module supplies power to each module through the converter on one hand and charges the storage battery on the other hand; when the circuit is out of power, the storage battery supplies power to the terminal through the converter.
Specifically, the data terminal 15 in communication with the core processing module 12 is configured to receive the power grid status information from the monitoring module and the preliminary analysis result obtained by the core processing module, generate a control instruction according to the preliminary analysis result, and send the control instruction through the wireless communication module.
Fig. 4 is a schematic diagram of a main flow of an embodiment of a data acquisition and positioning monitoring method for rapid power grid rush repair according to the present invention. In this embodiment, the method for data acquisition and positioning monitoring for rapid power grid rush repair is implemented by using the system described in the foregoing fig. 1 to 3, and the method includes the following steps:
step S10, the data acquisition module acquires the power data on the power line and converts the power data into a digital power signal; wherein the power data includes current data and voltage data; specifically, the data acquisition module converts voltage parameters and current parameters on the power line into weak electric signals through the voltage transformer and the current transformer by the data on the power line; then the weak current signal is processed by a precision detection and time division multiplier and is used for transmitting the processed data to a high-precision AD converter to be converted into digital signal quantity; and transmitting the data to the core processing module in a wired or wireless manner;
step S11, the monitoring module monitors the power line through the sensor equipment to obtain monitoring data;
step S12, the core processing module receives the digital power signal from the data acquisition module, performs fault analysis, and obtains corresponding fault type and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module to obtain a preliminary analysis result; specifically, an overcurrent breaking method is adopted to judge a short-circuit fault, a full-current method is adopted to judge a ground fault, when the fault occurs, a core processing module receives fault information from a data acquisition module, and then a matrix algorithm capable of realizing rapid positioning improvement of a fault section is adopted to carry out logic operation on a fault information arrangement matrix to obtain the fault section, so that accurate positioning of the fault section is realized;
and step S13, the wireless communication module sends the fault type and the fault area information from the core processing module, and the monitoring data or/and the primary analysis result from the monitoring module to the corresponding receiving object, and sends the monitoring data or/and the primary analysis result to the corresponding receiving object so as to remind corresponding personnel to perform fault quick repair arrangement processing.
More specifically, the step S10 further includes:
obtaining a weak current signal corresponding to a voltage parameter and a current parameter on a power line through a voltage transformer and a current transformer;
detecting and amplifying the weak current signal through a precision detector;
multiplying the voltage electric signal and the current electric signal in the weak electric signal after detection and amplification treatment by the signal detection and amplification unit, and separating the signals at preset time intervals to form corresponding frequency signals;
and carrying out AD conversion on the data obtained by the division multiplication processing unit to form a corresponding digital signal.
More specifically, the step S12 further includes:
performing fault type identification on the digital signal from the data acquisition module, wherein the fault type comprises the following steps: short circuit fault, ground fault and open circuit fault;
and (3) performing logic operation on the fault information arranging matrix by adopting a matrix algorithm capable of realizing rapid positioning improvement of the fault section, and identifying a specific fault position.
More specifically, the step S13 specifically includes:
the wireless communication module informs preset related staff of fault types and fault positions through short messages and displays the fault types and the fault positions through short messages on a monitoring master station interface, the monitoring master station is communicated with an expert rush-repair management system, and system software of a monitoring center guides rush-repair staff to realize rapid rush-repair of faults according to standard rush-repair processes, so that rapid rush-repair after the faults and power supply recovery are realized.
For more details, reference is made to the foregoing descriptions of fig. 1 to 3, and details are not repeated here.
The implementation of the invention has the following beneficial effects:
the invention provides a data acquisition and positioning monitoring system and method for quick emergency repair of a power grid; information of the power grid is acquired through the data acquisition module, the data acquisition module is arranged to acquire the information, the wireless communication module is arranged to stably convey the information, the monitoring module is arranged to monitor the real-time information of the power grid, the power supply module is arranged to supply power to each module, the core processing module is arranged to analyze and process the acquired information, the fault type and the fault area on the power line are scientifically determined, and related personnel can be informed to better maintain and overhaul the power grid, so that the efficiency of power distribution network maintenance work is improved.
The above disclosure is only a preferred embodiment of the present invention, and it is needless to say that the scope of the invention is not limited thereto, and therefore, the equivalent changes according to the claims of the present invention still fall within the scope of the present invention.
Claims (8)
1. The data acquisition and positioning monitoring system for the rapid rush-repair of the power grid is characterized by comprising a core processing module, and a data acquisition module, a wireless communication module, a monitoring module and a power supply module which are electrically connected with the core processing module;
the data acquisition module is used for acquiring power data on the power line and converting the power data into digital power signals; the power data includes current data and voltage data;
the monitoring module is used for monitoring the power line through the sensor equipment so as to obtain monitoring data;
the core processing module is used for receiving the digital power signals from the data acquisition module, performing fault analysis and obtaining corresponding fault types and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module to obtain a preliminary analysis result;
the wireless communication module is used for sending the fault type and the fault area information from the core processing module and the monitoring data or/and the primary analysis result from the monitoring module to the corresponding receiving object so as to remind corresponding personnel to perform fault quick repair arrangement processing;
the power supply module is used for providing power supply for the modules;
the core processing module further comprises:
the fault type identification unit is used for identifying the fault type of the digital signal from the data acquisition module, and the fault type comprises the following steps: short circuit fault, ground fault and open circuit fault;
the fault position identification unit is used for carrying out logic operation on the fault information arrangement matrix by adopting a matrix algorithm capable of realizing rapid positioning improvement of the fault section, and identifying a specific fault position.
2. The system of claim 1, wherein the data acquisition module further comprises:
the weak current information acquisition unit is used for acquiring a voltage parameter and a weak current signal corresponding to the current parameter on the power line through a voltage transformer and a current transformer;
the signal detection and amplification unit is used for detecting and amplifying the weak current signal through the precision detector;
the dividing multiplication processing unit is used for multiplying the voltage electric signal and the current electric signal in the weak electric signal which are detected and amplified by the signal detection amplification unit, and separating the voltage electric signal and the current electric signal at a preset time interval to form a corresponding frequency signal;
and the AD converter is used for carrying out AD conversion on the data obtained by the division multiplication processing unit to form a corresponding digital signal.
3. The system according to any one of claims 1 to 2, wherein the wireless communication module notifies a preset related staff of the fault type and the fault location short message and displays the short message on a monitoring master station interface, the monitoring master station communicates with an expert rush-repair management system, and system software of a monitoring center guides a rush-repair staff to realize rapid rush-repair of the fault according to a standard rush-repair flow, so that rapid rush-repair and power supply recovery after the fault are realized.
4. The system of claim 3, wherein the power module adopts a power supply mode of combining an alternating current conversion unit with a storage battery, wherein the alternating current conversion unit receives external alternating current, converts the external alternating current into direct current voltage after rectifying and filtering, and converts the direct current voltage into stable +24v voltage through the voltage stabilizing module; when the circuit is normal, the power supply module supplies power to each module through the converter on one hand and charges the storage battery on the other hand; when the circuit is out of power, the storage battery supplies power to the terminal through the converter.
5. The system of claim 4, further comprising a data terminal in communication with the core processing module for receiving the power grid status information from the monitoring module and the preliminary analysis result obtained by the core processing module, generating a control command according to the preliminary analysis result, and transmitting the control command via the wireless communication module.
6. A data acquisition and positioning monitoring method for rapid power grid repair, which is realized by adopting the system as claimed in any one of claims 1 to 5, and is characterized in that the method comprises the following steps:
step S10, the data acquisition module acquires the power data on the power line and converts the power data into a digital power signal; wherein the power data includes current data and voltage data;
step S11, the monitoring module monitors the power line through the sensor equipment to obtain monitoring data;
step S12, the core processing module receives the digital power signal from the data acquisition module, performs fault analysis, and obtains corresponding fault type and fault area information; performing preliminary analysis on the monitoring data obtained by the monitoring module to obtain a preliminary analysis result;
step S13, the wireless communication module sends the fault type and the fault area information from the core processing module, and the monitoring data or/and the primary analysis result from the monitoring module to the corresponding receiving object, and sends the monitoring data or/and the primary analysis result to the corresponding receiving object so as to remind corresponding personnel to perform fault quick repair arrangement processing;
wherein, the step S12 further includes:
performing fault type identification on the digital signal from the data acquisition module, wherein the fault type comprises the following steps: short circuit fault, ground fault and open circuit fault;
and (3) performing logic operation on the fault information arranging matrix by adopting a matrix algorithm capable of realizing rapid positioning improvement of the fault section, and identifying a specific fault position.
7. The method according to claim 6, wherein the step S10 further comprises:
obtaining a weak current signal corresponding to a voltage parameter and a current parameter on a power line through a voltage transformer and a current transformer;
detecting and amplifying the weak current signal through a precision detector;
multiplying the voltage electric signal and the current electric signal in the weak electric signal after detection and amplification treatment by the signal detection and amplification unit, and performing separation treatment at preset time intervals to form a corresponding frequency signal;
and carrying out AD conversion on the data obtained by the division multiplication processing unit to form a corresponding digital signal.
8. The method according to claim 7, wherein the step S13 specifically includes:
the wireless communication module informs preset related staff of fault types and fault positions through short messages and displays the fault types and the fault positions through short messages on a monitoring master station interface, the monitoring master station is communicated with an expert rush-repair management system, and system software of a monitoring center guides rush-repair staff to realize rapid rush-repair of faults according to standard rush-repair processes, so that rapid rush-repair after the faults and power supply recovery are realized.
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