CN101871990A - Fault positioning system of overhead power transmission line - Google Patents
Fault positioning system of overhead power transmission line Download PDFInfo
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- CN101871990A CN101871990A CN201010189302A CN201010189302A CN101871990A CN 101871990 A CN101871990 A CN 101871990A CN 201010189302 A CN201010189302 A CN 201010189302A CN 201010189302 A CN201010189302 A CN 201010189302A CN 101871990 A CN101871990 A CN 101871990A
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- frequency amplifier
- transmission line
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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 fault positioning system of an overhead power transmission line and a current phase detection device. The system comprises a base station and a plurality of current phase detection devices, wherein each current phase detection device is arranged on the each phase of the transmission line of an overhead transmission line pole and tower; the base station and the current phase detection devices constitute a Zigbee network, and communications are performed between the nodes of the Zigbee network according to the 802.15.4 standard so as to realize the positioning of a fault point. The fault positioning system of the invention utilizes the change of line current phase of wires at the two ends of the fault point, when an overhead power transmission line section is out of order to determine the position of the fault and greatly reduce the deviation of fault positioning.
Description
Technical field
The present invention relates to field of power, relate more specifically to a kind of fault positioning system of overhead power transmission line.
Background technology
Along with power system development, electric system overhead transmission line electric pressure and transmission capacity are all progressively improving, and the accurate location technology of the fault of overhead transmission line is also more and more paid attention to by people.The accurate location of fault can help the electric system staff to find abort situation accurately and rapidly, and this guarantees that for reliably power supply of timely reparation circuit, recovery the safety and stability and the economical operation of electric system all has crucial effect.The accurate location of how to realize the overhead transmission line trouble spot quickly and accurately is an important subject of electric system.
Electric system overhead transmission line localization of fault has more following fault distance-finding methods and device at present.The first kind: with the measuring circuit impedance is target Detection.The impedance method range finding that specifically has failure wave-recording method, pulse reflection method and electronic circuit to constitute.Second class: reactance method.It is that a kind of false voltage and electric current of utilizing calculates the fault loop reactance value, thereby calibrates the method for fault distance.The 3rd class: traveling wave method.It is voltage, current traveling wave travel-time on the line when measuring fault, utilizes the mistiming between the wave head to calculate fault distance.More than all methods all have a problem: that is exactly that deviation for failure locating is big.
Summary of the invention
The invention provides a kind of fault positioning system of overhead power transmission line.Can overcome defective of the prior art based on the present invention, reduce the deviation of localization of fault.
The invention discloses a kind of fault positioning system of overhead power transmission line, comprising: base station and a plurality of current phase pick-up unit, described each current phase pick-up unit are arranged on each phase transmission pressure of overhead transmission line line pole tower; And described base station and described a plurality of current phase pick-up unit constitute the Zigbee network, with foundation 802.15.4 standard, communicate between described Zigbee network node to realize the location of trouble spot.
Above-mentioned fault location system, preferred described current phase pick-up unit comprises: signal and power circuit, controller, radio frequency amplifier and antenna, described controller, described radio frequency amplifier and described antenna are linked in sequence successively; Described signal and power circuit comprise signal section and power unit, described signal section with described each mutually transmission pressure be connected, be used for detecting the phase place of transmission pressure electric current, described power unit is connected with described controller, described radio frequency amplifier respectively, provides power supply in order to give described controller, described radio frequency amplifier.
Full-wave rectifying circuit, stabilivolt DW, isolating diode D5 and filter capacitor C that above-mentioned fault location system, preferred described power unit comprise current transformer TA, are made of commutation diode V1, V2, V3 and V4; Current transformer TA primary side is the transmission pressure of overhead transmission line, and this lead passes the iron core-closed of current transformer TA; The secondary side two of current transformer TA terminates at the ac input end of the full-wave rectifying circuit that is made of commutation diode V1, V2, V3 and V4, the dc output end of full-wave rectifying circuit is anodal to link together with the anode of stabilivolt DW and the anode of isolating diode D5, and the negative electrode of isolating diode D5 connects the anode of filter capacitor C; The negative electrode of the dc output end negative pole of full-wave rectifying circuit and the negative electrode of stabilivolt DW and filter capacitor C links together.
Above-mentioned fault location system, preferred described signal section comprises described current transformer TA, current-limiting resistance R1, photoelectrical coupler GD and resistance R 2, the transmission pressure primary side current is sensed as secondary side current through described current transformer TA, and described secondary side current is connected with the transmitting terminal of described photoelectrical coupler GD through described current-limiting resistance R1; Power positive end VCC is connected with the receiving terminal of described photoelectrical coupler GD through described resistance R 2; The receiving terminal tie point output current phase signal of described resistance R 2 and described photoelectrical coupler GD.
Above-mentioned fault location system, preferred described controller is the CC2530 chip.
Above-mentioned fault location system, preferred described radio frequency amplifier is the MAX2247 radio frequency amplifier.
Above-mentioned fault location system, preferred described base station comprises: PC, controller, radio frequency amplifier, antenna and 3.3V power supply, described PC, controller, radio frequency amplifier and antenna are linked in sequence successively; The power supply of described controller and radio frequency amplifier is provided by the 3.3V power supply; Described controller is the CC2530 chip; Described radio frequency amplifier is the MAX2247 radio frequency amplifier.
Above-mentioned fault location system, preferred described PC is connected by USART0SPI serial communication mode with described controller, and the 3.3V power supply directly obtains by the voltage stabilizing of civil power step-down rectifier.
The lead line current phase place at two ends, trouble spot changed the decision bits abort situation when the present invention utilized the overhead transmission line troubles inside the sample space, had reduced the deviation of localization of fault greatly.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention;
Fault location system (a phase) synoptic diagram that Fig. 2 adopts for the present invention;
Fig. 3 is a current phase pick-up unit block scheme of the present invention;
Fig. 4 is the circuit diagram of signal of the present invention and power unit;
Fig. 5 is current-voltage phase waveform figure;
Fig. 6 is the circuit diagram of CC2530 programming Control chip of the present invention;
Fig. 7 is the circuit diagram of radio frequency amplifier of the present invention;
Fig. 8 is base station M of the present invention
0Structured flowchart.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Principle of work of the present invention is described below:
As shown in Figure 1, between A, B overhead transmission line L, be a, b, c three phase line.During normal the operation, in the every phase conductor of whole transmission line of electricity, line current is equal and opposite in direction everywhere, phase place identical (influence of transmission line of electricity capacitance current is little, can ignore).When the f point was short-circuited fault: (1) if A, B end all had equivalent power supply to exist, then in the current phase difference of f both sides, trouble spot transmission line of electricity; (2) if the A end has equivalent power supply to exist, the B end does not have equivalent power supply to exist, and then the A side has short-circuit current, and the B side does not have short-circuit current; (3) if the B end has equivalent power supply to exist, the A end does not have equivalent power supply to exist, and then the B side has short-circuit current, and the A side does not have short-circuit current.Generally speaking, when transmission line of electricity was short-circuited fault, short dot both sides current phase scarcely together.Rely on the variation of current phase in the transmission line of electricity, just can the accurate in locating short dot.
The transmission pressure of overhead transmission line is fixedlyed connected with shaft tower through insulator.Article one, overhead transmission line is supporting transmission pressure by many shaft towers and is constituting.Distance is greatly between 100-500m between the shaft tower of general overhead transmission line.Occur between certain 2 shaft tower as long as can accurately locate short trouble, just can find the trouble spot fast.
Below the present invention is described in detail.
As shown in Figure 2, whole overhead transmission line has n shaft tower, shaft tower be numbered 1,2,3...i, i+1...n.On each phase transmission pressure of each shaft tower, install a current phase pick-up unit additional, install 3n current phase pick-up unit altogether additional.
Be that example illustrates mutually with a below.
The current phase pick-up unit of corresponding shaft tower 1,2,3...i, i+1...n is numbered M
1, M
2, M
3... M
i, M
I+1... M
nWhen a is short-circuited fault mutually, such as between shaft tower i and shaft tower i+1, be short-circuited fault, current phase pick-up unit M so
1, M
2, M
3... M
iIt is identical locating detected transmission line of electricity current phase, and M
iWith M
I+1Locate detected transmission line of electricity current phase difference, variation has taken place in phase place.Utilize this variation of current phase just can determine that short circuit occurs between shaft tower i and the shaft tower i+1.Use current phase pick-up unit M
1, M
2, M
3... M
i, M
I+1... M
n, the current phase change information of each current phase pick-up unit installation place is delivered to the monitoring equipment M that places transmission line of electricity L end
0(abbreviate base station M as
0, generally containing that end of equivalent power supply) on.On the M0 of base station, just can orient the position that short trouble takes place.
Equally, the Fault Locating Method and a of b, c phase are similar.
Zigbee is the synonym of IEEE 802.15.4 agreement.According to the technology of this agreement regulation is a kind of short distance, low-power consumption, self-organization and wireless communication technology cheaply.Such as using chip CC2530 (price of every chip block is approximately 2 dollars) to constitute a Zigbee network node, it coordinates to realize communication mutually according to the 802.15.4 standard between thousands of Zigbee network nodes.These Zigbee network nodes only need energy seldom, by radiowave data are passed to another Zigbee network node from a Zigbee network node in the mode of relay.Each Zigbee network node not only itself can be used as monitored object, for example directly carries out data acquisition and monitoring with the current transformer that it connected, and other Zigbee network node of transfer passes the data information of coming automatically.Zigbee network node transmission range generally between 10～100m, after increasing the RF emissive power, also rises to 1～3km.Here the transmission range that refers to is the distance between adjacent node.By the relay of inter-node communication, transmission range can be very far away.Unlicensed band 2.4GHz is used in Zigbee network service.That Zigbee can adopt is starlike, sheet and mesh network topology, and by a host node management plurality of sub node, maximum host nodes can be managed 254 child nodes; Host node also can be formed the big net of 65000 nodes at most by the last layer network node control simultaneously.The current phase pick-up unit M that uses among the present invention
1, M
2, M
3... M
i, M
I+1... M
nAnd base station M
0Be made of the Zigbee network node, the programming Control chip adopts CC2530.
Fig. 3 is the structured flowchart of current phase pick-up unit of the present invention.This current phase pick-up unit comprises signal and power circuit, CC2530 programming Control chip, MAX2247 radio frequency amplifier and antenna.
Signal and power circuit effect have 2 points, and the one, the phase place of the detection current in wire in the current phase pick-up unit place transmission line of electricity of installing, the 2nd, provide power supply to whole current phase pick-up unit.
The CC2530 programming Control has constituted the core of Zigbee network node, and its effect is to control CC2530 emission and receive information by programming, and phase information is compared processing.
The effect of MAX2247 radio frequency amplifier section is to increase transmitting range with the emission information power amplification of CC2530 programming Control.The effect of antenna is emission and receives information.
With reference to Fig. 4, Fig. 4 is signal and power circuit synoptic diagram, comprising:
Power unit: through current transformer TA with the transmission line of electricity primary side current
Sense secondary side, induction current is
By commutation diode V1, V2, V3 and V4 full-wave rectification, stabilivolt DW voltage stabilizing is 4V, and D5 charges to capacitor C by isolating diode, constitutes the 3.3V power supply.
Signal section: through current transformer TA with the transmission line of electricity primary side current
Sense secondary side current
Connect photoelectrical coupler GD transmitting terminal through current-limiting resistance R1, obtain square-wave voltage V as shown in Figure 5 at the receiving end I/O of photoelectrical coupler GD mouth
I/OThis square-wave voltage V
I/OInclude the current phase information in the primary side transmission line wire in the signal.
Current transformer TA iron core adopts special annular core, and primary side passes iron core, and second siding ring is on iron core.The full annular iron core is divided into the two halves that can be stitched together, and installs at the scene with convenient.
With reference to Fig. 5, Fig. 5 is current-voltage phase waveform figure.
Among the figure, the primary side waveform of current transformer TA is
The secondary side waveform of current transformer TA is
Do not take into account the phase differential of current transformer primary side current and secondary side current among the figure.V
I/OVoltage square wave for the primary side current that obtains through conversion of signals.Include the current phase information in the primary side transmission line wire in this square wave voltage signal.
With reference to Fig. 6, Fig. 6 is the circuit diagram of CC2530 programming Control chip of the present invention.
In the drawings, the I/O port is the square-wave signal receiving port, and RFOUT is the radiofrequency signal transmit port.The square wave voltage signal V that will include the current phase information in this node (i) primary side transmission line wire
I/OGeneral purpose I/O the port that is input to CC2530 is (such as the P of 11 pin
1-0Mouthful).By CC2530 is programmed and control, the square-wave signal of detected input is sent, receive relatively for next node (i+1), receive the square-wave signal that comes from a last node (i-1) emission simultaneously and compare, calculate the phase change situation of this node (i) and a last node (i-1) square-wave signal with the square-wave signal of this node (i).Specifically be to detect the current phase that this node (i node) locates and launch, accept for next node (i+1 node).Accept the current phase of a node (i-1) and compare with this node (i) current phase.If this node (i) is identical with a last node (i-1) current phase, then emission information is that this node (i) numbering and phase place do not change code 1, otherwise, if this node (i) is inequality with a last node (i-1) current phase, then emission information is this node (i) numbering and phase change code 0.
With reference to Fig. 7, Fig. 7 is the circuit diagram of radio frequency amplifier.By port RFOUT with the radiofrequency signal of CC2530 chip output by MAX2247 and its external circuit with the power amplification of signal, launch by antenna, so that signal transmission distance reaches 1Km.
With reference to Fig. 8, Fig. 8 is base station M of the present invention
0Block scheme, among the figure, this 3 part mode of connection of CC2530, MAX2247 and antenna is similar to the wiring among Fig. 3, and the 3.3V power supply can directly obtain by the voltage stabilizing of civil power step-down rectifier.CC2530 is connected with computing machine by USART0SPI serial communication mode, and the port of CC2530 is selected P0-2, P0-3, P0-4 and P0-5.By the computer programming deal with data, demonstrate the transmission line of electricity current phase situation of change at each shaft tower place on computers, thus the fault location point.
The current phase pick-up unit is because the dispersiveness of the Current Transformer TA of institute device primary side and secondary side phase differential parameter, communication delay between used photoelectrical coupler GD parameter dispersed and two nodes, even will inevitably cause adjacent two internodal phase data also to have certain gap once surveying under the complete same-phase of electric current, so when programming is judged, between adjacent two nodes, set a falling phase error δ.For the phase differential of both sides, trouble spot current phase, this error is minimum.If the phase error of adjacent node is littler than δ, just think these two node same-phases.Otherwise, just think that variation has taken place these two node phase places.
More than a kind of fault positioning system of overhead power transmission line provided by the present invention is described in detail, used specific embodiment herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand system of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a fault positioning system of overhead power transmission line is characterized in that, comprising:
Base station and a plurality of current phase pick-up unit, described each current phase pick-up unit are arranged on each phase transmission pressure of overhead transmission line line pole tower; And,
Described base station and described a plurality of current phase pick-up unit constitute the Zigbee network, with foundation 802.15.4 standard, communicate between described Zigbee network node to realize the location of trouble spot.
2. fault location system according to claim 1 is characterized in that, described current phase pick-up unit comprises:
Signal and power circuit, controller, radio frequency amplifier and antenna, described controller, described radio frequency amplifier and described antenna are linked in sequence successively;
Described signal and power circuit comprise signal section and power unit, described signal section with described each mutually transmission pressure be connected, be used for detecting the phase place of transmission pressure electric current, described power unit is connected with described controller, described radio frequency amplifier respectively, provides power supply in order to give described controller, described radio frequency amplifier.
3. fault location system according to claim 2 is characterized in that,
Full-wave rectifying circuit, stabilivolt DW, isolating diode D5 and filter capacitor C that described power unit comprises current transformer TA, is made of commutation diode V1, V2, V3 and V4;
Current transformer TA primary side is the transmission pressure of overhead transmission line, and this lead passes the iron core-closed of current transformer TA; The secondary side two of current transformer TA terminates at the ac input end of the full-wave rectifying circuit that is made of commutation diode V1, V2, V3 and V4, the dc output end of full-wave rectifying circuit is anodal to link together with the anode of stabilivolt DW and the anode of isolating diode D5, and the negative electrode of isolating diode D5 connects the anode of filter capacitor C; The negative electrode of the dc output end negative pole of full-wave rectifying circuit and the negative electrode of stabilivolt DW and filter capacitor C links together.
4. fault location system according to claim 3 is characterized in that,
Described signal section comprises described current transformer TA, current-limiting resistance R1, photoelectrical coupler GD and resistance R 2, the transmission pressure primary side current is sensed as secondary side current through described current transformer TA, and described secondary side current is connected with the transmitting terminal of described photoelectrical coupler GD through described current-limiting resistance R1; Power positive end VCC is connected with the receiving terminal of described photoelectrical coupler GD through described resistance R 2; The receiving terminal tie point output current phase signal of described resistance R 2 and described photoelectrical coupler GD.
5. fault location system according to claim 4 is characterized in that, described controller is the CC2530 chip.
6. fault location system according to claim 5 is characterized in that, described radio frequency amplifier is the MAX2247 radio frequency amplifier.
7. fault location system according to claim 1 is characterized in that, described base station comprises:
PC, controller, radio frequency amplifier, antenna and 3.3V power supply, described PC, controller, radio frequency amplifier and antenna are linked in sequence successively; The power supply of described controller and radio frequency amplifier is provided by the 3.3V power supply; Described controller is the CC2530 chip; Described radio frequency amplifier is the MAX2247 radio frequency amplifier.
8. fault location system according to claim 7 is characterized in that,
Described PC is connected by USART0SPI serial communication mode with described controller, and the 3.3V power supply directly obtains by the voltage stabilizing of civil power step-down rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010189302XA CN101871990B (en) | 2010-05-24 | 2010-05-24 | Fault positioning system of overhead power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010189302XA CN101871990B (en) | 2010-05-24 | 2010-05-24 | Fault positioning system of overhead power transmission line |
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| Publication Number | Publication Date |
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| CN101871990A true CN101871990A (en) | 2010-10-27 |
| CN101871990B CN101871990B (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010189302XA Expired - Fee Related CN101871990B (en) | 2010-05-24 | 2010-05-24 | Fault positioning system of overhead power transmission line |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750810A (en) * | 2011-04-22 | 2012-10-24 | 上海市电力公司 | Communication terminal of ground fault automatic positioning device for transmission line |
| CN102820709A (en) * | 2011-06-10 | 2012-12-12 | 上海科斗电子科技有限公司 | Wireless sensor system supplied power through mutual inductor |
| CN103558509A (en) * | 2013-10-30 | 2014-02-05 | 北京交大创新科技中心 | Electric transmission line insulator online fault locating method based on zigbee |
| CN104898026A (en) * | 2015-06-11 | 2015-09-09 | 国家电网公司 | Method and device for positioning of cable fault |
| CN105137290A (en) * | 2015-09-18 | 2015-12-09 | 国网上海市电力公司 | Method for rapidly determining position of grounding fault of overhead line |
| CN105259470A (en) * | 2015-09-30 | 2016-01-20 | 贵州电力试验研究院 | Fault distance measuring system based on optical current transformers and method |
| CN105353268A (en) * | 2015-10-10 | 2016-02-24 | 电子科技大学 | Method for judging and positioning distributed traveling wave fault of power transmission line |
| CN102820709B (en) * | 2011-06-10 | 2016-12-14 | 上海科斗电子科技有限公司 | Use the wireless sensor system of transformer for supplying power |
| CN108107326A (en) * | 2017-12-27 | 2018-06-01 | 武汉朗开智能科技有限公司 | Ultra-high-tension power transmission line fault location system |
| DE102012013669B4 (en) * | 2012-07-11 | 2019-11-28 | Dipl.-Ing. H. Horstmann Gmbh | System for fault current monitoring of overhead electrical lines |
| CN110959120A (en) * | 2017-07-25 | 2020-04-03 | 西门子交通有限公司 | Method and device for fault location along an energy supply line in a direct current system |
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| CN103558492B (en) * | 2013-10-30 | 2016-03-23 | 北京交通大学 | The online fault location system of a kind of electric transmission line isolator based on Zigbee |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750810A (en) * | 2011-04-22 | 2012-10-24 | 上海市电力公司 | Communication terminal of ground fault automatic positioning device for transmission line |
| CN102820709B (en) * | 2011-06-10 | 2016-12-14 | 上海科斗电子科技有限公司 | Use the wireless sensor system of transformer for supplying power |
| CN102820709A (en) * | 2011-06-10 | 2012-12-12 | 上海科斗电子科技有限公司 | Wireless sensor system supplied power through mutual inductor |
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| CN103558509A (en) * | 2013-10-30 | 2014-02-05 | 北京交大创新科技中心 | Electric transmission line insulator online fault locating method based on zigbee |
| CN103558509B (en) * | 2013-10-30 | 2016-04-13 | 北京交大创新科技中心 | The online Fault Locating Method of a kind of electric transmission line isolator based on zigbee |
| CN104898026A (en) * | 2015-06-11 | 2015-09-09 | 国家电网公司 | Method and device for positioning of cable fault |
| CN105137290A (en) * | 2015-09-18 | 2015-12-09 | 国网上海市电力公司 | Method for rapidly determining position of grounding fault of overhead line |
| CN105137290B (en) * | 2015-09-18 | 2018-05-29 | 国网上海市电力公司 | A kind of method at quick definite overhead transmission line earth fault position |
| CN105259470A (en) * | 2015-09-30 | 2016-01-20 | 贵州电力试验研究院 | Fault distance measuring system based on optical current transformers and method |
| CN105353268A (en) * | 2015-10-10 | 2016-02-24 | 电子科技大学 | Method for judging and positioning distributed traveling wave fault of power transmission line |
| CN105353268B (en) * | 2015-10-10 | 2018-04-06 | 电子科技大学 | One kind is used for the judgement of transmission line of electricity distribution traveling wave fault and localization method |
| CN110959120A (en) * | 2017-07-25 | 2020-04-03 | 西门子交通有限公司 | Method and device for fault location along an energy supply line in a direct current system |
| US11500006B2 (en) | 2017-07-25 | 2022-11-15 | Siemens Mobility GmbH | Method and device for locating faults along an energy supply chain for DC current systems |
| CN108107326A (en) * | 2017-12-27 | 2018-06-01 | 武汉朗开智能科技有限公司 | Ultra-high-tension power transmission line fault location system |
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