CN105334429A - Power distribution network circuit fault detecting method - Google Patents
Power distribution network circuit fault detecting method Download PDFInfo
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- CN105334429A CN105334429A CN201510854015.9A CN201510854015A CN105334429A CN 105334429 A CN105334429 A CN 105334429A CN 201510854015 A CN201510854015 A CN 201510854015A CN 105334429 A CN105334429 A CN 105334429A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a power distribution network circuit fault detecting method. A current collecting unit collects current values of a power distribution network circuit and a branch circuit, and after being processed through a microprocessor, the current values are sent to a current collecting unit communication module by a ZIGBEE wireless communication module; the current collecting unit communication module receives the current values and then sends the current values to a power distribution network circuit fault detecting and analyzing background; the power distribution network circuit fault detecting and analyzing background is used for processing and analyzing the received current values, and the processed current values are compared with a preset normal current value range; the power distribution network circuit fault detecting and analyzing background sends fault information to a mobile terminal, and the mobile terminal performs sound alarming. By means of the method, a fault circuit or a branch circuit of the fault circuit is directly positioned, the positioning precision is higher, circuit operation inspecting staff can perform quick inspection and fault removal of the fault circuit more conveniently, the inspecting workload of the circuit inspecting staff is greatly decreased, and therefore the inspecting staff can quickly remove power distribution network circuit faults.
Description
Technical field
The invention belongs to electric network fault detection field, be specifically related to a kind of distribution network line fault detection method.
Background technology
Distribution network line complex structure, branched line are various, add neutral point many employings isolated neutral of distribution network line or the system through grounding through arc, the circuit that judges to break down and lines branch is difficult to when making distribution network line break down like this, make power supply department need a large amount of line inspection of configuration and malfunction elimination personnel, the maintenance adding electric company examines cost with fortune.
At present, detection for distribution network line fault adopts following two schemes usually: (1) adopts the small current neutral grounding system analysis software of transformer station, this software utilizes and to there will be larger zero-sequence current or residual voltage during distribution network line generation earth fault to judge whether outlet earth fault, judge the circuit of earth fault further, then notify that operations staff patrols and examines, (2) distribution network line fault indicator is utilized to judge the lines branch that earth fault occurs and railroad section further, its principle utilizes small current neutral grounding system analysis software, when judging distribution network line generation earth fault, by dropping into a small connect ground resistance in parallel with arc suppression coil in short-term, the branched line electric current occurring earth fault is increased, ensure that circuit overcurrent protective device is failure to actuate simultaneously, such fault detector can overturn, again low resistance grounding branch road is excised after pending fault indicator overturns, return to original isolated neutral or compensated distribution network.Line data-logging personnel can utilize the upturned position of fault detector, judge the concrete circuit that fault occurs and railroad section.
Summary of the invention
In view of this, the object of the invention is for the deficiencies in the prior art, a kind of distribution network line fault detection method is provided, this system is directly targeted to the branched line of faulty line or circuit, positioning precision higher, more convenient circuit fortune inspection personnel carry out quick inspection and the failture evacuation of line fault, that reduces line data-logging personnel greatly patrols and examines workload, enables patrol officer get rid of distribution network line fault rapidly.
For achieving the above object, the present invention by the following technical solutions:
A kind of distribution network line fault detection method, comprises the steps:
Current acquisition unit gathers the current value of distribution network line and branched line, after microprocessor processes, adopts ZIGBEE wireless communication module to send to current acquisition unit communication module;
Current acquisition unit communication module sends to distribution network line fault to detect and analyzes backstage after receiving current value;
Distribution network line fault detects analysis backstage and processes the current value received, analyze, and the current value after process and the normal electrical flow valuve scope preset is contrasted, if within the scope of normal electrical flow valuve, then judges that circuit is normal; If exceed normal electrical flow valuve scope, then judge that circuit breaks down, and report to the police on distribution network line fault detection analysis backstage;
Distribution network line fault detects analysis backstage and failure message is sent to mobile terminal, and carries out audible alarm at mobile terminal.
Preferably, described current acquisition unit gathers the current value of distribution network line and branched line, after microprocessor processes, adopts ZIGBEE wireless communication module to send to current acquisition unit communication module, comprising:
The cylindrical plunger of power module is placed along the planar horizontal vertical with wire, cylindrical plunger is wound with power supply winding, power supply winding, through exporting constant DC voltage with the bridge rectifier filter circuit of power supply winding switching, is arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module power supply;
Arc-shaped iron core current transformer gathers the primary current signal on distribution network line wire, and produces the secondary voltage be directly proportional to primary current through integrating circuit;
The current signal that microprocessor acquisition arc-shaped iron core current transformer obtains and voltage signal, carry out sampling processing to the voltage signal that integrating circuit exports, calculate size and the phase place of its first-harmonic and harmonic signal;
Voltage signal after current signal and microprocessor processes is sent to current acquisition unit communication module through ZIGBEE wireless communication module.
Preferably, described current acquisition unit comprises arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module and power module, described arc-shaped iron core current transformer is connected with described microprocessor through integrating circuit, described ZIGBEE wireless communication module connects microprocessor, and described integrating circuit, microprocessor are all connected with described power module with ZIGBEE wireless communication module; Described arc-shaped iron core current transformer comprises arc-shaped iron core, secondary coil, integrating circuit, support and porcelain bottle insulators, described secondary coil comprises measures winding and power supply winding, described measurement winding and power supply winding technique are in described arc-shaped iron core, the two ends of described measurement winding are connected with described integrating circuit, the two ends of described power supply winding are connected with described integrating circuit, described arc-shaped iron core and integrating circuit are all arranged in described support, and described Bracket setting is in described porcelain bottle insulators; Through hole is provided with bottom described porcelain bottle insulators.
Preferably, described current acquisition unit communication module comprises solar panel, GPRS wireless communication module and accumulator, and solar panel is the main electricity of current acquisition unit communication module, and accumulator is standby power supply.
Preferably, described distribution network line fault detect analyze backstage comprise the GPRS communication data connected successively receive and send front end processor, distribution network line fault ground connection line selection apparatus and select-line analysis module, Data Analysis Services module, detect and localization of fault module and GPRS wireless communication module.
Preferably, current acquisition unit communication module comprises housing and solar photovoltaic cell panel, and described housing is arranged on the shaft tower of distribution line, and described solar photovoltaic cell panel is arranged on the housing, described enclosure interior is provided with charging circuit, accumulator, isolation DC/DC module, microcontroller, GPRS wireless communication module and Zigbee wireless communication module, the output terminal of described solar photovoltaic cell panel is electrically connected with the input end of charging circuit, the output terminal of described charging circuit is electrically connected with the input end of accumulator, the electric energy output end of described accumulator is electrically connected with the input end of isolation DC/DC module, the output terminal of described isolation DC/DC module respectively with microcontroller, the power input electrical connection of GPRS wireless communication module and Zigbee wireless communication module, the signal output part of described microcontroller is electrically connected with the signal input part of Zigbee wireless communication module, the signal output part of described microcontroller is electrically connected with the signal input part of GPRS wireless communication module.
Preferably, described microcontroller carries out data communication by RS485 universal serial bus and Zigbee wireless communication module.
Preferably, described distribution network line fault detect analyze backstage comprise the GPRS communication data connected successively receive and send front end processor, distribution network line fault ground connection line selection apparatus and select-line analysis module, Data Analysis Services module, detect and localization of fault module and GPRS wireless communication module.
The invention has the beneficial effects as follows:
Method provided by the invention, that can reduce line data-logging personnel greatly patrols and examines workload, enables patrol officer get rid of distribution network line fault rapidly.
Positioning precision of the present invention higher, more convenient circuit fortune inspection personnel carry out quick inspection and the failture evacuation of line fault, because this system is directly targeted to the branched line of faulty line or circuit; give the concrete Position Approximate of branched line with Time, patrol officer can investigate and fix a breakdown in free way scene.
The present invention does not need the earthing mode of the neutral point changing existing distribution network line, remains the feature still normally running two hours after earth fault appears in distribution network line.
Distribution network line fault detection system of the present invention is owing to make use of the mobile phone of line data-logging personnel, by means of the mobile phone daemon software of patrol officer, only need after failture evacuation confirms that part clicks confirmation after circuit failture evacuation, daemon software can obtain the relevant information of failture evacuation, is convenient to realize fault recovery rapidly and power supply.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of a kind of distribution network line fault detection method of the present invention.
Fig. 2 is the method flow diagram of step S101 of the present invention.
Fig. 3 is the structural representation of arc-shaped iron core current transformer.
Fig. 4 is another structural representation of arc-shaped iron core current transformer.
Fig. 5 is the theory diagram of current acquisition unit communication module.
Fig. 6 is the circuit theory diagrams of charging circuit in current acquisition unit communication module.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes following steps:
Step S101, current acquisition unit gathers the current value of distribution network line and branched line, after microprocessor processes, adopts ZIGBEE wireless communication module to send to current acquisition unit communication module;
Step S102, current acquisition unit communication module sends to distribution network line fault to detect and analyzes backstage after receiving current value;
Step S103, distribution network line fault detects analysis backstage and processes the current value received, analyze, and the current value after process and the normal electrical flow valuve scope preset is contrasted, if within the scope of normal electrical flow valuve, then judges that circuit is normal; If exceed normal electrical flow valuve scope, then judge that circuit breaks down, and report to the police on distribution network line fault detection analysis backstage;
Step S104, distribution network line fault detects analysis backstage and failure message is sent to mobile terminal, and carries out audible alarm at mobile terminal.
In one embodiment, as shown in Figure 2, step S101 may be embodied as following process:
The cylindrical plunger of step S201 power module is placed along the planar horizontal vertical with wire, cylindrical plunger is wound with power supply winding, power supply winding, through exporting constant DC voltage with the bridge rectifier filter circuit of power supply winding switching, is arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module power supply;
Step S202, arc-shaped iron core current transformer gathers the primary current signal on distribution network line wire, and produces the secondary voltage be directly proportional to primary current through integrating circuit;
Step S203, the current signal that microprocessor acquisition arc-shaped iron core current transformer obtains and voltage signal, carry out sampling processing to the voltage signal that integrating circuit exports, calculate size and the phase place of its first-harmonic and harmonic signal;
Step S204, sends to current acquisition unit communication module by the voltage signal after current signal and microprocessor processes through ZIGBEE wireless communication module.
In one embodiment, current acquisition unit comprises arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module and power module, arc-shaped iron core current transformer is connected with microprocessor through integrating circuit, ZIGBEE wireless communication module connects microprocessor, and integrating circuit, microprocessor are all connected with power module with ZIGBEE wireless communication module.Arc-shaped iron core current transformer comprises arc-shaped iron core, secondary coil, integrating circuit, support and porcelain bottle insulators, secondary coil comprises measures winding and power supply winding, measurement winding and power supply winding technique are in described arc-shaped iron core, the two ends measuring winding are connected with integrating circuit, the two ends of power supply winding are connected with integrating circuit, arc-shaped iron core and integrating circuit are all arranged in support, and Bracket setting is in porcelain bottle insulators; Through hole is provided with bottom porcelain bottle insulators.
In one embodiment, as shown in Figure 3, arc-shaped iron core current transformer comprises arc-shaped iron core 1, secondary coil, integrating circuit 5, support 4 and porcelain bottle insulators 7.Arc-shaped iron core 1 is the silicon steel material of high magnetic property, and the angular range of its central angle is 60 °-180 °, and the central angle of the arc-shaped iron core 1 of the present embodiment is 60 °.
Secondary coil comprises measures winding 2 and power supply winding 3, and measurement winding 2 and power supply winding 3 are wound in arc-shaped iron core 1, and the two ends measuring winding 2 are connected with the signal input part of integrating circuit 5, and the two ends of power supply winding 3 are connected with the power input of integrating circuit 5.
Integrating circuit 5 is arranged at the bottom of support 4 inside, and integrating circuit comprises rectification unit and filter unit, and the output terminal of described rectification unit is connected with the input end of described filter unit.Measure winding 2 and export the induction electromotive force be directly proportional to the differential of primary current, the voltage that the output of this induction electromotive force is reduced into as being directly proportional to primary current in the integrating circuit of integrating circuit 5 exports, the output electromotive force of power supply winding 3 is also directly proportional to the differential of primary current, this electromotive force exports and is carried out rectification by the rectification unit in follow-up integrating circuit 5 and filter unit, the stable voltage output of supplying integrating circuit work is obtained after filtering and voltage stabilizing, the output voltage signal of the measurement winding 2 after Integral Processing can Direct driver measurement instrument and other electric logging equipment.
Arc-shaped iron core 1 of the present invention, secondary coil are arranged on the top of support 4 inside, the center of support 4 leave for secondary coil draw perforation, the output of secondary coil is introduced the bottom of support 4, space and screw that integrating circuit 5 is installed is left bottom support 4, be fixed on bottom support 4 by integrating circuit 5 by bolt 8, support 4 is as the skeleton of this arc-shaped iron core coil current mutual inductor.
After the camber line iron core of above-mentioned current transformer, secondary coil, support 4, integrating circuit 5 installation, the porcelain bottle insulators 7 being placed on a hollow is inner, and the secondary output line of integrating circuit 5 is drawn by the through hole 6 bottom porcelain bottle insulators 7.Support 4 is insulating support, installation for internal electronic part and current transformer is fixed, to be convenient to realize current collecting device being installed on the line fixing for ensureing electronic section and primary current wire have enough insulation distances and creepage distance Tong Time to ensure can not to be damaged ， Tong Time by the daylight of outside, raindrop, dust etc. by electronic section for insulation column overcoat.
When using the present invention to carry out the current measurement of power distribution network, only need primary current wire and arc-shaped iron core 1 cross section orthogonal to place, iron core does not directly contact with wire, but by porcelain bottle insulators 7 and a conductive contact.After equipment places, by the secondary output line of integrating circuit 5 and externally measured Instrument connection, the electric current in power distribution network just can be read.
The concrete steps of the present embodiment arc-shaped iron core current transformer method for making are as follows:
Step 1): be wound on by secondary coil in arc-shaped iron core 1, the two ends measuring winding 2 are connected with the signal input part of integrating circuit 5, and the two ends of power supply winding 3 are connected with the power input of integrating circuit 5;
Step 2): top camber line iron core and secondary coil being fixedly installed in support 4, the center of support 4 leave for mutual inductor secondary coil draw perforation, leave space and threaded hole that integrating circuit 5 is installed bottom support 4, integrating circuit 5 is fixed on the bottom of support 4 by bolt 8;
Step 3): after camber line iron core, secondary coil, support 4, integrating circuit 5 installation, the porcelain bottle insulators 7 placing it in a hollow is inner, bottom porcelain bottle insulators 7, open a through hole 6, the secondary output line of integrating circuit is drawn by the aperture bottom the perforation at the center of support 4 and porcelain bottle insulators 7;
Step 4): above-mentioned steps 1), step 2) and step 3) complete after, namely can be made into complete arc-shaped iron core 1 coil current mutual inductor.
In one embodiment, as shown in Figure 4, integrating circuit 5 is cast in the bottom of support 4 by poured with epoxy resin layer 9.The cross section of arc-shaped iron core is circular or rectangle.
The concrete steps of the present embodiment arc-shaped iron core current transformer method for making are as follows:
Step 1): be wound on by secondary coil in arc-shaped iron core 1, the two ends measuring winding 2 are connected with the signal input part of integrating circuit 5, and the two ends of power supply winding 3 are connected with the power input of integrating circuit 5;
Step 2): top camber line iron core and secondary coil being fixedly installed in support 4, the center of support 4 leave for mutual inductor secondary coil draw perforation, leave the space of installing integrating circuit 5 bottom support 4, integrating circuit 5 is cast in the bottom of support 4 by poured with epoxy resin layer 9;
Step 3): after camber line iron core, secondary coil, support 4, integrating circuit 5 installation, the porcelain bottle insulators 7 placing it in a hollow is inner, bottom porcelain bottle insulators 7, open a through hole 6, the secondary output line of integrating circuit is drawn by the aperture bottom the perforation at the center of support 4 and porcelain bottle insulators 7;
Step 4): above-mentioned steps 1), step 2) and step 3) complete after, namely can be made into complete arc-shaped iron core 1 coil current mutual inductor.
Arc-shaped iron core current transformer is contacted with primary current wire by outside insulating supporting skeleton; Power unit comprises and adopts cylindrical plunger, power supply winding on cylindrical plunger and the current rectifying and wave filtering circuit made by amorphous alloy material to form, cylindrical plunger is placed along the planar horizontal vertical with wire, iron core is wound with power supply winding, bridge rectifier filter circuit is had after power supply winding, export constant DC voltage, power unit is also contacted with primary current wire by the insulating supporting skeleton of outside.Integrating circuit adopts active integrating circuit, the amplifier chip power supply power supply of this integrating circuit is from power unit, and the voltage signal exported from the measurement winding on arc-shaped iron core current transformer becomes the voltage signal be directly proportional to line current after this integrating circuit.
Microprocessor portion adopts ARM7 chip and peripheral circuit thereof to form, containing multi-channel a/d converter, FLASHROM program storage, RAM etc. in ARM7 chip, the sampling processing to the voltage signal that integrating circuit exports and analysis can be realized, obtain the information such as size and phase place of a line current, some some definite value process and memory functions as mutual inductor ratio etc. can be carried out with Time.ZIGBEE wireless communication module adopts GPRS communication module, this module can by the serial data communication port of ARM7 chip, the current information measured is sent to background communication data handling system, be convenient to background communication data processing software carry out display and processing Tong Time and give ARM7 by the control signal that background communication system software sends and carry out data processing, thus realize the bidirectional data communication of line current harvester and long-range background system.
The various piece of above-mentioned signal gathering unit also needs the installation carrying out each assembly in the equipment of reality, exterior insulation that is fixing and whole equipment is protected, therefore configuration one is also needed these modules to be fixed the insulation mounting bracket of installation, Tong Time also needs the insulator overcoat of a column support type, insulation mounting bracket adopts the supporting structure of epoxy resin casting, the insulator overcoat of column support type can adopt silicon rubber, the insulating coating of epoxy resin or porcelain bottle insulators material, this insulating coating can adopt insulation column overcoat, for ensureing that electronic section and primary current wire have enough insulation distances and creepage distance, Tong Time ensures that electronic section can not by the daylight of outside, raindrop, the infringements such as dust, it is fixing that Tong Time is convenient to realize current collecting device being installed on the line.
In one embodiment, arc-shaped iron core adopts the silicon steel material of high magnetic property.Silicon steel material is made up of following component and weight percentage: C:0.005-0.008%, Si:3-3.5%, Mn:0.1-0.2%, Cr:0.05-0.07%, Se:0.02% ~ 0.05%, P:0.02-0.03%, S:0.1-0.2%, Al:3-5%, Ni:0.04-0.06%, Cu:1-2%, surplus is Fe and inevitable impurity.
In this embodiment, magnetic permeability and resistivity high, magnetizability is good, and internal stress is good, and Current compliance is good, and composition is simple, cost is low.
As a kind of optimal way, silicon steel material is made up of following component and weight percentage: C:0.007%, Si:3.3%, Mn:0.1%, Cr:0.06%, Se:0.04%, P:0.03%, S:0.1%, Al:4%, Ni:0.05%, Cu:1%, surplus is Fe and inevitable impurity.
In one embodiment, power module comprises and adopts cylindrical plunger, power supply winding on cylindrical plunger and the current rectifying and wave filtering circuit be made up of amorphous alloy material to form.Described amorphous alloy material comprises the component of following weight percentage: Si:8-10%; B:1-2%; P:0.005-0.008%; C:2-3%; Mn:1-2%; Mg:0.5-0.8%, Ti:0.5-0.8%, Ge:0.2-0.5%, Ag0.05-0.1%, surplus is iron.
The preparation process of amorphous alloy material is: vacuum smelting furnace put into by the raw material of the certain proportioning taken, and regulates suction to 5 × 10
-3pa, is then filled with 0.05MPa argon shield gas; With the obtained foundry alloy of stove cooling after melting evenly.Spray into or pour into the obtained non-crystaline amorphous metal bar of copper mold after subsequently foundry alloy being put into induction furnace remelting.This amorphous alloy material has and has that amorphous formation ability is strong, saturation induction density is high, reaches 1.8T, the feature such as with low cost.
In one embodiment, as shown in Figure 5, current acquisition unit communication module comprises housing 1 and solar photovoltaic cell panel 2, and solar photovoltaic cell panel 2 is rotating to be arranged on housing 1, and the actual conditions that can receive sunshine according to installation site are carried out rotation and regulated.
Housing 1 inside is provided with charging circuit 3, accumulator 4, isolation DC/DC module 5, microcontroller 6, GPRS wireless communication module 7 and Zigbee wireless communication module 8.Solar photovoltaic cell panel 2 is as the main electricity of this remote radio communication transmitting device, and the small-sized monocrystalline silicon photovoltaic battery panel of its power selection 4W, for the sun power on daytime is converted into electrical power storage in accumulator 4, uses in order to evening and cloudy, rainy day.The electric energy output end of small-sized monocrystalline silicon photovoltaic battery panel is connected with the input end of charging circuit 3, the output terminal of charging circuit 3 is electrically connected with the input end of accumulator 4, accumulator 4 selects two economize on electricitys to press as 6V, power are the chargeable lithium cell of 3W, the series connection of this two batteries uses, and the electric energy output end of accumulator 4 is electrically connected with the input end of isolation DC/DC module 5; Isolation DC/DC module 5 realizes accumulator 4 and carries out voltage transformation with the electric isolution ， Tong Time of electronic circuitry part, cell voltage is converted to 8051 single-chip microcomputers, direct current supply voltage needed for GPRS wireless communication module 7; Microcontroller 6 adopts single-chip microcomputer, and single-chip microcomputer adopts 8051 singlechip chips, and the rs 232 serial interface signal output terminal of 8051 singlechip chips, after the conversion of MAX485 integrated chip, is communicated with Zigbee wireless communication module 8 by RS485 bus; 8051 singlechip chips also need expansion serial ports to export, realized by special low-power consumption serial-port extension chip SP2538, the rs 232 serial interface signal output terminal of expansion, after the conversion of MAX485 integrated chip, is communicated with GPRS wireless communication module 7 by RS485 bus.
In this embodiment, housing 1 adopts the insulating material of following component to make: Corvic 56-60 part, thermoplastic elastomer 20-30 part, plastifier 5-8 part, antioxidant 0.1-0.5 part, coupling agent 2-3 part, polyetheretherketone 10-15 part, glass fibre 5-8 part, carbon fiber 1-2 part.
Insulating material of the present invention: reusable, easily reclaim, high heat-resisting and good insulating, heat distortion temperature 100-105 DEG C, specific insulation 5.8 × 10
12Ω cm, impact strength (KJ/m2) 100-110.
Insulating material preparation method: a), dry 3-5 hour in raw material 70-80 DEG C drying box will have been weighed according to weight proportion; B), each component is put in high-speed mixer mix 3-5 minute; C), by said mixture banburying 25-30 minute in Banbury mixer; D), by said mixture pulverize evenly in Material disintegrator, through double-screw extruding pelletizing.
The electrical schematic diagram of the charging circuit 3 of inventive shell 1 inside as shown in Figure 6, charging circuit 3 has charge controlling chip, charge controlling chip adopts CN3083 chip, this chip can adjust charging current automatically according to the current output capability of input voltage source, the electric current input capability of input voltage source can be utilized to greatest extent, and the overcharge to accumulator 4 can be prevented, ensured the safe and stable operation of accumulator 4.
The principle of work of communications portion of the present invention is:
ZIGBEE wireless communication module 8 is for realizing the bidirectional data communication between the present invention and distribution network line current acquisition unit, receive the measurement current value of the three-phase current collecting unit on distribution network line, this current value is wirelessly sended over by each current acquisition unit gone up mutually, and the communication instruction on the long-range backstage simultaneously received by GPRS wireless communication module 7 is sent to each current acquisition unit gone up mutually; 8051 single-chip microcomputers are for realizing the analysis and treament conversion work of the bi-directional data between long-range GPRS wireless communication module 7 and ZIGBEE wireless communication module 8; GPRS wireless communication module 7 to receive with the back-end data in transformer station communicate with the remote-wireless between process software for realizing the present invention, by this module, the current information of power distribution network current acquisition unit is wirelessly sent to back-end data reception and the process software of transformer station, simultaneously, the back-end data receiving transformer station receives the command information sent with process software, and this command information is by being sent in distribution network line current acquisition unit by ZIGBEE wireless communication module 8 after 8051 single-chip microcomputer process.
Distribution network line fault detect analyze backstage comprise the GPRS communication data that connects successively receive and send front end processor, distribution network line fault ground connection line selection apparatus and select-line analysis module, Data Analysis Services module, detect and localization of fault module and GPRS wireless communication module.Distribution network line fault detects analysis backstage 3 and is sent on the mobile phone of patrol officer by information such as the line fault information, faulty line and the abort situation that detect, the abort situation utilizing the fault of mobile phone positioning display units of smart mobile phone to determine by patrol officer and type, can arrive on-the-spot investigation rapidly and fix a breakdown in time.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a distribution network line fault detection method, is characterized in that: comprise the steps:
Current acquisition unit gathers the current value of distribution network line and branched line, after microprocessor processes, adopts ZIGBEE wireless communication module to send to current acquisition unit communication module;
Current acquisition unit communication module sends to distribution network line fault to detect and analyzes backstage after receiving current value;
Distribution network line fault detects analysis backstage and processes the current value received, analyze, and the current value after process and the normal electrical flow valuve scope preset is contrasted, if within the scope of normal electrical flow valuve, then judges that circuit is normal; If exceed normal electrical flow valuve scope, then judge that circuit breaks down, and report to the police on distribution network line fault detection analysis backstage;
Distribution network line fault detects analysis backstage and failure message is sent to mobile terminal, and carries out audible alarm at mobile terminal.
2. a kind of distribution network line fault detection method according to claim 1, is characterized in that:
Described current acquisition unit gathers the current value of distribution network line and branched line, after microprocessor processes, adopts ZIGBEE wireless communication module to send to current acquisition unit communication module, comprising:
The cylindrical plunger of power module is placed along the planar horizontal vertical with wire, cylindrical plunger is wound with power supply winding, power supply winding, through exporting constant DC voltage with the bridge rectifier filter circuit of power supply winding switching, is arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module power supply;
Arc-shaped iron core current transformer gathers the primary current signal on distribution network line wire, and produces the secondary voltage be directly proportional to primary current through integrating circuit;
The current signal that microprocessor acquisition arc-shaped iron core current transformer obtains and voltage signal, carry out sampling processing to the voltage signal that integrating circuit exports, calculate size and the phase place of its first-harmonic and harmonic signal;
Voltage signal after current signal and microprocessor processes is sent to current acquisition unit communication module through ZIGBEE wireless communication module.
3. a kind of distribution network line fault detection method according to claim 1, is characterized in that:
Described current acquisition unit comprises arc-shaped iron core current transformer, microprocessor, ZIGBEE wireless communication module and power module, described arc-shaped iron core current transformer is connected with described microprocessor through integrating circuit, described ZIGBEE wireless communication module connects microprocessor, and described integrating circuit, microprocessor are all connected with described power module with ZIGBEE wireless communication module; Described arc-shaped iron core current transformer comprises arc-shaped iron core, secondary coil, integrating circuit, support and porcelain bottle insulators, described secondary coil comprises measures winding and power supply winding, described measurement winding and power supply winding technique are in described arc-shaped iron core, the two ends of described measurement winding are connected with described integrating circuit, the two ends of described power supply winding are connected with described integrating circuit, described arc-shaped iron core and integrating circuit are all arranged in described support, and described Bracket setting is in described porcelain bottle insulators; Through hole is provided with bottom described porcelain bottle insulators.
4. a kind of distribution network line fault detection method according to claim 3, it is characterized in that: described current acquisition unit communication module comprises solar panel, GPRS wireless communication module and accumulator, solar panel is the main electricity of current acquisition unit communication module, and accumulator is standby power supply.
5. a kind of distribution network line fault detection method according to claim 1, is characterized in that: described distribution network line fault detect analyze backstage comprise the GPRS communication data connected successively receive and send front end processor, distribution network line fault ground connection line selection apparatus and select-line analysis module, Data Analysis Services module, detect and localization of fault module and GPRS wireless communication module.
6. a kind of distribution network line fault detection method according to claim 1, it is characterized in that: current acquisition unit communication module comprises housing and solar photovoltaic cell panel, described housing is arranged on the shaft tower of distribution line, and described solar photovoltaic cell panel is arranged on the housing, described enclosure interior is provided with charging circuit, accumulator, isolation DC/DC module, microcontroller, GPRS wireless communication module and Zigbee wireless communication module, the output terminal of described solar photovoltaic cell panel is electrically connected with the input end of charging circuit, the output terminal of described charging circuit is electrically connected with the input end of accumulator, the electric energy output end of described accumulator is electrically connected with the input end of isolation DC/DC module, the output terminal of described isolation DC/DC module respectively with microcontroller, the power input electrical connection of GPRS wireless communication module and Zigbee wireless communication module, the signal output part of described microcontroller is electrically connected with the signal input part of Zigbee wireless communication module, the signal output part of described microcontroller is electrically connected with the signal input part of GPRS wireless communication module.
7. a kind of distribution network line fault detection method according to claim 6, is characterized in that: described microcontroller carries out data communication by RS485 universal serial bus and Zigbee wireless communication module.
8. a kind of distribution network line fault detection method according to claim 1, is characterized in that: described distribution network line fault detect analyze backstage comprise the GPRS communication data connected successively receive and send front end processor, distribution network line fault ground connection line selection apparatus and select-line analysis module, Data Analysis Services module, detect and localization of fault module and GPRS wireless communication module.
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| CN114113895A (en) * | 2021-11-27 | 2022-03-01 | 广东电网有限责任公司广州供电局 | Distribution network fault detection device and system |
| CN114264890A (en) * | 2021-12-22 | 2022-04-01 | 成都高斯电子技术有限公司 | Non-contact type electrical parameter measurement and verification device and method for operating power equipment |
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