CN105738768A - Method and device for monitoring residual current and terminal voltage on line and positioning faults - Google Patents
Method and device for monitoring residual current and terminal voltage on line and positioning faults Download PDFInfo
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- CN105738768A CN105738768A CN201610116862.XA CN201610116862A CN105738768A CN 105738768 A CN105738768 A CN 105738768A CN 201610116862 A CN201610116862 A CN 201610116862A CN 105738768 A CN105738768 A CN 105738768A
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- residual current
- terminal voltage
- centroid
- zigbee
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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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- 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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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a method and device for monitoring residual current and terminal voltage on line and positioning faults. The device comprises a residual current protector and a collector which are installed inside the peasant household; the collector is installed on the residual current protector for collecting the residual current and the terminal voltage of the agricultural power grid in real time; the collector comprises a ZigBee communication module, a power supply module and a microcontroller; the power supply module supplies power to the microcontroller and the ZigBee module; the ZigBee communication module is used for realizing the information interaction between the microcontroller and the preset center node; the microcontroller performs real-time monitoring on the residual current and the terminal voltage and generates the fault information which is transmitted to the center node and then is forwarded toa power supply control center by the center node. The invention provides effective information for the power management department for monitoring the terminal voltage on line and promptly searching the residual current fault generation position, which benefits the improvement of the power supply quality and the power consumption safety of the village and can help to find the safety hazard of the residual current in advance.
Description
Technical field
The present invention relates to agricultural power network field of fault detection, especially one residual current and terminal voltage on-line monitoring and Fault Locating Method and device.This device can on-line monitoring rural power grids user's residual current and terminal voltage information, and transfer information to Centroid by wireless network, finally will send information to power supply management department.Facilitate administration section's detection terminal voltage and location electric leakage user, and possess electric leakage position accurate positioning function, be conducive to improving rural power service quality and Electrical Safety.
Background technology
Along with developing rapidly of rural economy and constantly striding forward of rural power grids upgrading paces, electrical equipment substantial increase in rural power grids, power load grows with each passing day, and everything is all that potential safety hazard has been buried in security of rural power grid stable operation.But owing to rural power grids have the features such as circuit length, rate of load condensate be low, the situation causing rural power grids circuit low-voltage occurs now and then, the normal electricity consumption causing urban residents requires to be interfered, and the electricity consumption that power supply management department receives every year is maximum about the proportion of low-voltage in complaining.
Existing distribution run unit is not in place to quality of voltage monitoring, it is difficult to accomplishes in real time and grasps user's quality of voltage data fully.Management system, the initiative that existing distribution unit solves low-voltage problem is not high, and scene often just can be gone to after receiving customer complaint to carry out voltage detecting.From hardware supported, quality of voltage automatic monitoring point negligible amounts, do not play due voltage monitoring effect.Therefore terminal voltage on-line monitoring method provided by the invention is necessary for the problem solving rural power grids low-voltage.
Not only existing low-voltage problem in rural power grids, the harm that residual current causes also can not be ignored, and the generation of residual current had both been likely to be by aging circuit damaged, it is also possible to is caused by the person gets an electric shock.The personal safety and safety of property of resident will be caused great threat by this potential safety hazard.Be furnished with residual current operated protective device in present some rural inhabitants man, residual current operated protective device is once detect that residual current exceedes threshold value and will cut off the electricity supply, it is to avoid the generation of bigger danger.But, after line powering is cut-off, the position that residual current fault occurs cannot accurately be known in power supply management department, it is impossible to quickly restores electricity timely.Additionally, domestic residual current operated protective device transfinited because of quality or use time, also can there is the behavior such as malfunction, tripping, have a strong impact on the reliability of power supply.Therefore residual current on-line monitoring provided by the invention and fault point positioning method are also extremely necessary for solving rural power grids residual current problem.
Existing residual current monitoring system is generally adopted carrier communication to realize data transmission, and carrier communication is a kind of wire transmission technology.Its principle is to carry, by electric current, the high-frequency signal comprising residual current information, and its advantage is to use simply, need not additionally build transmission line, but its modem procedue is complicated, and disadvantage is cannot to communicate under dead electricity situation；The wireless network transmission technology that the present invention adopts then realizes the mutual of residual current, low-voltage and fault location information by wireless networking, and maximum advantage is long transmission distance and dead electricity sustainable operation.
Summary of the invention
Goal of the invention: for solving above-mentioned technical problem, the present invention proposes a kind of residual current and terminal voltage on-line monitoring and Fault Locating Method and device.
Technical scheme: the technical scheme that the present invention proposes is: a kind of residual current and terminal voltage on-line monitoring and fault locator, including the residual current operated protective device being arranged in man of peasant household and harvester；Residual current operated protective device is connected with agricultural power network, and harvester is arranged on residual current operated protective device, Real-time Collection agricultural power network residual current and terminal voltage, and harvester includes ZigBee communication module, power module and microcontroller；Wherein,
Power module obtains line voltage from agricultural power network, powers for microcontroller and ZigBee module after Transformer Rectifier；Simultaneously to built-in energy-storage units storage electric energy, when power supply circuits break down, energy-storage units it is other module for power supply；
ZigBee communication module is mutual for the information realized between microcontroller and Centroid set in advance；
Microcontroller receives patrolling and examining instruction and residual current and terminal voltage carry out monitoring online in real time according to patrolling and examining instruction and corresponding data is uploaded to Centroid from Centroid by ZigBee communication module, Centroid corresponding data is forwarded to Electrical Supply And Control Center and preserves；When microcontroller monitors residual current or terminal voltage beyond setting threshold value, then generate fault message according to residual current and terminal voltage value and be sent to Centroid, Centroid being forwarded to Electrical Supply And Control Center；Described fault message includes: break down the residual current at place, terminal voltage and customer position information.
Concrete, described power module also includes transformation voltage stabilizing rectification circuit and booster circuit, the line voltage of acquisition is divided into two-way by power module, a road line voltage first after transformation voltage stabilizing rectification circuit transformation, voltage stabilizing, rectification are boosted then through booster circuit as the running voltage of other modules；Another road line voltage is energy-storage units charging.
Further, it is characterised in that described energy-storage units is super capacitor.
The present invention also proposes a kind of residual current and terminal voltage on-line monitoring and Fault Locating Method, and the method includes:
Step (1): utilize terminal voltage information and residual current information that described residual current and terminal voltage on-line monitoring and fault locator monitor in agricultural power network in real time, and according to the threshold value real-time judge arranged and generate fault message；Utilizing the ZigBee communication module in described device that terminal voltage information, residual current information and fault message are uploaded to Centroid, corresponding data is sent to Electrical Supply And Control Center by Centroid；
Step (2): by described residual current with terminal voltage on-line monitoring and the ZigBee communication module construction ZigBee wireless network in fault locator, realize each ZigBee communication module mutual with the information of Centroid, and preset a ZigBee communication module in ZigBee wireless network as Centroid；Centroid sends to other ZigBee communication modules patrols and examines the on-line monitoring work of each device in instruction startup ZigBee wireless network, receive the fault message that other ZigBee communication modules send simultaneously, and the residual current of the fault message occurred in whole ZigBee wireless network and on-line monitoring is transmitted to Electrical Supply And Control Center with terminal voltage data.
Concrete, the step building ZigBee wireless network in described step (2) includes:
A. choose a ZigBee communication module as Centroid, and PANID and the communications band of ZigBee wireless network are set；
B. other ZigBee communication modules join in this network with identical PANID and frequency range, and the ZigBee communication module except Centroid is simultaneously as terminal node and routing node；When new ZigBee communication module adds ZigBee wireless network, it is incorporated to network by contiguous node as routing node；
C.ZigBee wireless network is one unique short address of each node distribution, in order to distinguish the node being arranged in different user man.
Beneficial effect: in the present invention; the technology that residual current operated protective device communicates with wireless self-networking is prior art; but the present invention utilizes residual current operated protective device to design residual current and terminal voltage on-line monitoring and fault locator, and to adopt the technical scheme that the technology that this device communicates realizes residual current and terminal voltage on-line monitoring with fault location with wireless self-networking be be not disclosed in prior art.The invention solves administration section be difficult to detection terminal voltage and be accurately positioned the problem of electric leakage user, compared with prior art, present invention have the advantage that
(1) present invention has the function of on-line real time monitoring terminal voltage, actively quality of voltage data is collected, and provides comparatively complete data basis for solving rural power grids low-voltage problem in the future.
(2) existing residual current data transmission is divided into wire transmission and radio communication two ways.Although wire transmission principle is simple, but it utilizes electrical network to do carrier wave, and modulation /demodulation aspect realizes more complicated, and cannot transmit under dead electricity situation.The present invention adopts short distance ZigBee wireless network to realize communication, has the good characteristic such as dynamic group net and low-power consumption.It is the method that the system modules such as ZigBee are powered that this patent is different from the conventional battery that adopts, and utilizes the electric energy that super capacitor stores to power, and still can send fault data when dead electricity to Centroid, and eliminate the cumbersome process of periodic replacement battery.
(3) the art of this patent scheme adopts modularized design, is directly installed on tampered residual current operated protective device, residual current operated protective device original function is not impacted, and itself does not increase binding post.
(4) method described in the invention has the function of on-line monitoring residual current and terminal voltage, it is thus possible to effectively screen the duty of residual current operated protective device, it is judged that whether it exists malfunction, misaction.
Accompanying drawing explanation
Fig. 1 is the external structure of a kind of embodiment of device of the present invention；
Fig. 2 is the circuit structure theory diagram of embodiments of the invention；
Fig. 3 is the topology diagram of ZigBee wireless network in the present invention.
In figure: 1, harvester, 2, residual current operated protective device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
Being illustrated in figure 1 the external structure of a kind of embodiment of device of the present invention, main part includes residual current operated protective device 2 and harvester 1 two parts.The present embodiment adopts card slot type design to be fixed on residual current operated protective device by harvester hardware, is wherein provided with voltage transformer, ZigBee communication module, ultracapacitor, Transformer Rectifier mu balanced circuit, booster circuit and microcontroller in harvester.
It is illustrated in figure 2 the circuit structure theory diagram of embodiments of the invention.
Under normal circumstances, after harvester obtains civil power by residual current operated protective device, primary voltage needs to charge for super capacitor after transformation, rectification, voltage stabilizing, provides running voltage for microcontroller and ZigBee module simultaneously.Residual current and terminal voltage numerical value are monitored by microcontroller online in real time, received from the instruction of patrolling and examining of Centroid by ZigBee communication module simultaneously, and send residual current and terminal voltage data and customer position information to data terminal according to instruction.If residual current numerical value exceedes early warning value but not yet arrive residual current fault value, or terminal voltage is beyond given operation interval, and microcontroller can send related data equally to Centroid.
Once circuit generation serious drain situation, harvester detects that residual current exceeds residual current fault value, and protector also implements de-energizing actions because residual current is excessive simultaneously.At this moment the power supply being just made up of super capacitor and boost chip provides running voltage for system, steady operation more than 120 seconds is continued, it is ensured that the residual current data detected before sending power-off smoothly before super capacitor electricity exhausts and fault location information are to Centroid for microcontroller and ZigBee wireless communication module.
The topology diagram being illustrated in figure 3 in the present invention ZigBee wireless network, when building ZigBee wireless network, will preset a ZigBee communication module in ZigBee wireless network as Centroid；System after the power-up, open at first, and has set PANID (PersonalAreaNetworkID) and frequency range by the Centroid (coordinator) of ZigBee wireless network.
After network is established, other ZigBee wireless network nodes (same ZigBee communication module is simultaneously as terminal node or routing node) join in this network with identical PANID and frequency range, contiguous node can be selected to be incorporated to network as routing node from Centroid terminal node farther out, by routing node, data are transmitted step by step, finally pass data to the Centroid in this TV station district.Centroid place is provided with ZigBee/GPRS gateway, and the residual current fault message that whole district occurs can be packed and Reseal agreement by ZigBee/GPRS gateway, and by GPRS module, data is ultimately routed to Electrical Supply And Control Center.
After completing networking, ZigBee communication module will accept the residual current data, terminal voltage data and the fault location information that are transmitted by 232 interfaces from microcontroller in real time.Residual current detects via harvester, carries out analog digital conversion, and read by microcontroller circulation after conditioning.Microcontroller judges that whether current residual electric current is beyond threshold value, once detect that size of current exceeds threshold value, uploading by residual current data and peasant household's positional information, carrying out early warning.If now domestic residual current operated protective device action; cut off power supply; super capacitor then starts power supply; residual current data before power-off and corresponding peasant household's numbering (writing microcontroller in advance) are sent to ZigBee communication module by microcontroller; information is sent to Centroid through routing node again by this ZigBee wireless network node, sends it to Electrical Supply And Control Center through GPRS network after.Electrical Supply And Control Center can be assigned rural power work to rush towards in man of corresponding peasant household and be fixed a breakdown and potential safety hazard, recovers supply of electric power.
Additionally, the node in network can be assigned to unique four hexadecimal short addresses, it is arranged on the ZigBee wireless network node in man of different peasant household with difference.
The above is only the preferred embodiment of the present invention; it is noted that, for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. a residual current and terminal voltage on-line monitoring and fault locator, it is characterised in that include being arranged on the residual current operated protective device in man of peasant household and harvester；Residual current operated protective device is connected with agricultural power network, and harvester is arranged on residual current operated protective device, Real-time Collection agricultural power network residual current and terminal voltage；Harvester includes ZigBee communication module, power module and microcontroller；Wherein,
Power module obtains line voltage from agricultural power network, powers for microcontroller and ZigBee module after Transformer Rectifier；Simultaneously to built-in energy-storage units storage electric energy, when power supply circuits break down, energy-storage units it is other module for power supply；
ZigBee communication module is mutual for the information realized between microcontroller and Centroid set in advance；
Microcontroller receives patrolling and examining instruction and residual current and terminal voltage carried out by residual current operated protective device monitoring online in real time according to patrolling and examining instruction and corresponding data is uploaded to Centroid from Centroid by ZigBee communication module, Centroid corresponding data is forwarded to Electrical Supply And Control Center and preserves；When microcontroller monitors residual current or terminal voltage beyond setting threshold value, then generate fault message according to residual current, terminal voltage value and the customer position information prestored and be sent to Centroid, Centroid being forwarded to Electrical Supply And Control Center.
2. a kind of residual current according to claim 1 and terminal voltage on-line monitoring and fault locator, it is characterized in that, described power module also includes transformation voltage stabilizing rectification circuit and booster circuit, the line voltage of acquisition is divided into two-way by power module, a road line voltage first after transformation voltage stabilizing rectification circuit transformation, voltage stabilizing, rectification are boosted then through booster circuit as the running voltage of other modules；Another road line voltage is energy-storage units charging.
3. a kind of residual current according to claim 2 and terminal voltage on-line monitoring and fault locator, it is characterised in that described energy-storage units is super capacitor.
4. a residual current and terminal voltage on-line monitoring and Fault Locating Method, it is characterised in that including:
Step (1): utilize terminal voltage information and residual current information that described residual current and terminal voltage on-line monitoring and fault locator monitor in agricultural power network in real time, and according to the threshold value real-time judge arranged and generate fault message；Utilizing the ZigBee communication module in described device that terminal voltage information, residual current information and fault message are uploaded to Centroid, corresponding data is sent to Electrical Supply And Control Center by Centroid；
Step (2): by described residual current with terminal voltage on-line monitoring and the ZigBee communication module construction ZigBee wireless network in fault locator, realize each ZigBee communication module mutual with the information of Centroid, and preset a ZigBee communication module in ZigBee wireless network as Centroid；Centroid sends to other ZigBee communication modules patrols and examines the on-line monitoring work of each device in instruction startup ZigBee wireless network, receive the fault message that other ZigBee communication modules send simultaneously, and the residual current of the fault message occurred in whole ZigBee wireless network and on-line monitoring is transmitted to Electrical Supply And Control Center with terminal voltage data.
5. a kind of residual current according to claim 4 and terminal voltage on-line monitoring and Fault Locating Method, it is characterised in that the step building ZigBee wireless network in described step (2) includes:
A. choose a ZigBee communication module as Centroid, and PANID and the communications band of ZigBee wireless network are set；
B. other ZigBee communication modules join in this network with identical PANID and frequency range, and the ZigBee communication module except Centroid is simultaneously as terminal node and routing node；When new ZigBee communication module adds ZigBee wireless network, it is incorporated to network by contiguous node as routing node；
C.ZigBee wireless network is one unique short address of each node distribution, in order to distinguish the node being arranged in different user man.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610116862.XA CN105738768A (en) | 2016-03-01 | 2016-03-01 | Method and device for monitoring residual current and terminal voltage on line and positioning faults |
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| CN201610116862.XA CN105738768A (en) | 2016-03-01 | 2016-03-01 | Method and device for monitoring residual current and terminal voltage on line and positioning faults |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110556919A (en) * | 2019-08-12 | 2019-12-10 | 浙江恒业电子有限公司 | NB-IoT-based network distribution system with residual current detection function and terminal |
| CN111337738A (en) * | 2020-04-15 | 2020-06-26 | 国网安徽省电力有限公司电力科学研究院 | Residual current monitoring method and system and monitoring terminal |
| CN111781418A (en) * | 2020-06-22 | 2020-10-16 | 北京智芯微电子科技有限公司 | Method, device and system for monitoring residual current of low-voltage power distribution network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20160706 |