CN107612589A - Aerial power transmission line on-line monitoring system - Google Patents
Aerial power transmission line on-line monitoring system Download PDFInfo
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- CN107612589A CN107612589A CN201710987070.4A CN201710987070A CN107612589A CN 107612589 A CN107612589 A CN 107612589A CN 201710987070 A CN201710987070 A CN 201710987070A CN 107612589 A CN107612589 A CN 107612589A
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- transmission line
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- overhead power
- line monitoring
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Abstract
The invention provides aerial power transmission line on-line monitoring system, including：Transmission line monitoring module, for gathering aerial power transmission line achievement data from aerial power transmission line, and the aerial power transmission line achievement data collected is wirelessly exported；Base station, described base station and described transmission line monitoring module wireless connection, for receiving and handling the aerial power transmission line achievement data of the transmission line monitoring module output, and the aerial power transmission line achievement data after reception and processing is wirelessly exported；Transmission line monitoring center, described transmission line monitoring center are connected with described base station radio, for receiving and handling the aerial power transmission line achievement data of the base station output, and obtain monitoring result.The present invention realizes the intellectual monitoring to aerial power transmission line using wireless sensor network technology.
Description
Technical Field
The invention relates to the technical field of power monitoring, in particular to an overhead power transmission line on-line monitoring system.
Background
An overhead power transmission line, particularly an extra-high voltage, long-distance and large-capacity power transmission line, is affected by weather conditions, external environments and the like during operation, and often generates breeze vibration exceeding an allowable amplitude value, which often causes fatigue damage of certain line parts, such as fatigue strand breakage of a ground wire, fatigue damage or abrasion of hardware fittings, spacers and pole and tower components and the like. The fatigue strand breakage of the ground wire is a common problem of an overhead power transmission line, and when the problem is serious, the whole line needs to be replaced by a new wire. At present, breeze vibration seriously threatens the safe operation of the overhead power transmission line of the power grid in China, including large span.
The accidents of fatigue and strand breaking of the lead and ground wires caused by breeze vibration are caused by an accumulative effect, an accumulative time and process exist, the accidents are difficult to observe by naked eyes during vibration, and the strand breaking of the lead and ground wires caused by fatigue can be serious once the vibration damper is damaged or falls off. Before that, the harm is not easy to be detected, and the faults are difficult to be effectively prevented by the traditional manual line patrol method. At present, the intelligent data monitoring device is urgently needed to carry out on-line monitoring and fault diagnosis on breeze vibration of the power transmission line, discover hidden dangers as soon as possible and remove faults in time so as to improve the operation reliability of the power transmission line. In addition, the online monitoring of the line temperature has great reference significance for improving the transmission capacity of the lead, reducing the line investment and relieving the situation of the shortage of the power supply situation in China. The monitoring of the wind deflection angle provides important reference for the safe operation of the overhead power transmission line, particularly the safe operation and the improved design under special meteorological conditions.
The method in the related art is a periodic detection. When a certain power transmission line is measured regularly, a live-line worker must mount an instrument on a ground wire each time before measurement starts, and remove the instrument after measurement ends. After the measurement is finished, data processing and analysis can be carried out only in a laboratory. Even if the radio telemetering device, the sensor and the transmitter can only be fixed on the suspension clamp, and the receiver and the recording device are placed in a ground trailer or a house, the magnetic tape recording is adopted, and the radio telemetering device, the sensor and the transmitter can only be processed and analyzed by a computer after returning to a laboratory, so that a measurement result is obtained. The vibration measuring instrument is difficult to realize, and the on-site measurement time is limited because the vibration measuring instrument uses a battery for power supply, and particularly, the measurement result is sometimes low in representativeness and lack of real-time property. The measurement method and the vibration measuring instrument used at present have certain limitations due to the reasons.
Disclosure of Invention
In view of the above problems, the present invention provides an overhead power transmission line on-line monitoring system.
The purpose of the invention is realized by adopting the following technical scheme:
there is provided an overhead power transmission line on-line monitoring system, including:
the power transmission line monitoring module is used for collecting the index data of the overhead power transmission line from the overhead power transmission line and wirelessly outputting the collected index data of the overhead power transmission line;
the base station is wirelessly connected with the power transmission line monitoring module and is used for receiving and processing the overhead power transmission line index data output by the power transmission line monitoring module and wirelessly outputting the received and processed overhead power transmission line index data;
and the power transmission line monitoring center is in wireless connection with the base station and is used for receiving and processing the index data of the overhead power transmission line output by the base station and obtaining a monitoring result.
Preferably, the base station includes:
the short-distance wireless communication unit is used for establishing a wireless communication link with the power transmission line monitoring module, collecting the index data of the overhead power transmission line sent by the power transmission line monitoring module in real time and outputting the collected index data of the overhead power transmission line;
the data analysis unit is coupled with the short-distance wireless communication unit and used for receiving the overhead power transmission line index data output by the short-distance wireless communication unit; analyzing and processing the received index data of the overhead power transmission line, then storing the index data into a memory, and managing and outputting the data;
a remote wireless transmission unit coupled with the data analysis unit, receiving the index data of the overhead power transmission line output by the data analysis unit, establishing a wireless link with the power transmission line monitoring center through a mobile communication network and transmitting the index data of the overhead power transmission line to the power transmission line monitoring center;
and the power supply unit is used for supplying electric energy to the base station.
Preferably, the power supply unit refers to a solar power supply unit or an alternating current power supply unit.
The invention has the beneficial effects that: the wireless sensor network technology is utilized to realize the on-line monitoring and fault diagnosis of the overhead power transmission line; facilitating condition maintenance; servicing production and safe operation; the fatigue life is predicted, the safety is guaranteed, and the service life of the line is prolonged.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a block diagram of the structural connections of one embodiment of the present invention;
fig. 2 is a block diagram of the structural connection of a base station according to an embodiment of the present invention.
Reference numerals are as follows:
the system comprises a power transmission line monitoring module 1, a base station 2, a power transmission line monitoring center 3, a short-distance wireless communication unit 10, a data analysis unit 20, a long-distance wireless transmission unit 30 and a power supply unit 40.
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1, the present embodiment provides an overhead power transmission line online monitoring system, including:
the power transmission line monitoring module 1 is used for collecting the index data of the overhead power transmission line from the overhead power transmission line and wirelessly outputting the collected index data of the overhead power transmission line;
the base station 2 is wirelessly connected with the power transmission line monitoring module 1, and is used for receiving and processing the overhead power transmission line index data output by the power transmission line monitoring module 1 and wirelessly outputting the received and processed overhead power transmission line index data;
and the power transmission line monitoring center is in wireless connection with the base station 2 and is used for receiving and processing the index data of the overhead power transmission line output by the base station 2 and obtaining a monitoring result.
The index data of the overhead power transmission line comprises the breeze vibration angle, the wire temperature, the wind deflection angle and meteorological environment data of the overhead power transmission line.
In one embodiment, as shown in fig. 2, the base station 2 includes:
a short-distance wireless communication unit for establishing a wireless communication link with the power transmission line monitoring module 1, collecting overhead power transmission line index data sent by the power transmission line monitoring module 1 in real time, and outputting the collected overhead power transmission line index data;
the data analysis unit is coupled with the short-distance wireless communication unit and used for receiving the overhead power transmission line index data output by the short-distance wireless communication unit; analyzing and processing the received index data of the overhead power transmission line, then storing the index data into a memory, and managing and outputting the data;
a remote wireless transmission unit coupled with the data analysis unit, receiving the index data of the overhead power transmission line output by the data analysis unit, establishing a wireless link with the power transmission line monitoring center through a mobile communication network and transmitting the index data of the overhead power transmission line to the power transmission line monitoring center;
and the power supply unit is used for supplying electric energy to the base station 2.
The power supply unit refers to a solar power supply unit or an alternating current power supply unit.
The embodiment of the invention realizes the on-line monitoring and fault diagnosis of the overhead power transmission line by using the wireless sensor network technology; promoting state maintenance; servicing production and safe operation; the fatigue life is predicted, the safety is guaranteed, and the service life of the line is prolonged.
In one embodiment, the power transmission line monitoring module 1 includes a plurality of sensor nodes for collecting index data of the overhead power transmission line, and each sensor node is deployed in a set monitoring area of the overhead power transmission line with a set density λ poisson distribution.
When the network is initialized, the overhead power transmission line monitoring area is divided into a plurality of power transmission line monitoring sub-areas, sensor nodes belonging to the same power transmission line monitoring sub-area determine cluster head nodes through cluster head election, and the rest sensor nodes are used as member monitoring nodes in a cluster where the cluster head nodes are located, wherein the cluster head nodes are used for receiving and processing overhead power transmission line index data collected by the member monitoring nodes in the cluster, and transmitting the processed overhead power transmission line index data to a next hop node or a base station 2.
In one embodiment, the sensor nodes having the same area attribute belong to the same power transmission line monitoring sub-area, and each sensor node determines its own area attribute before cluster head election, which specifically includes:
(1) Define base station 2 as S s Arbitrary sensor node S i Has the coordinates of (x) i ,y i ) I =1, …, n, n is the number of sensor nodes, and sensor node S 0 ∈S i And x is 0 ＝max i＝1,…,n x i Is connected to S s And S 0 ，S s And S i Defining the included angle between the two straight lines as S i And S 0 The included angle of (A);
(2) Each sensor node calculates the area attribute value thereof according to the following formula:
in the formula (I), the compound is shown in the specification,indicating sensorNode S i Of the area attribute value of θ i0 Is S i And S 0 Angle of (E) fs Power amplification loss when using a free space model for the communication model of the sensor node, E mp Power amplification loss, int [. When multipath fading model is adopted for communication model of sensor node]Expressing a rounding operation, wherein mod is a complementation function, eta is a set adjusting factor, and the value range is (0.01,0.1);
(3) And the sensor nodes with the same area attribute value belong to the same power transmission line monitoring sub-area.
In the embodiment, the sensor nodes with the same area attribute value are distributed to the same power transmission line monitoring sub-area, the related calculation formula of the area attribute value is defined, the area division of the sensor nodes is carried out through the area attribute value, the control on the scale division of the overhead power transmission line monitoring area is realized, cluster head nodes are determined by the sensor nodes belonging to the same power transmission line monitoring sub-area through cluster head election, the formed clusters can be uniformly and reasonably distributed through the division control of the overhead power transmission line monitoring area, and compared with the mode of randomly selecting the cluster head nodes, the network loss caused by unreasonable distribution of the clusters can be avoided, and the collection of index data of the overhead power transmission line is ensured.
In one embodiment, when cluster head election is performed on sensor nodes belonging to the same power transmission line monitoring sub-area, the following steps are specifically performed:
(1) The sensor node broadcasts self position information to other sensor nodes in the communication range, all the sensor nodes receiving the information are regarded as neighbor nodes of the sensor node, the neighbor information list of the sensor node is updated after the information is received, and an energy threshold value W is set T All residual energy in the rectangular power transmission line monitoring sub-area is greater than an energy threshold value W T Electing the sensor node to become a candidate node;
(2) Each candidate node calculates the cluster head competition weight per se according to the following formula:
in the formula (I), the compound is shown in the specification,representing candidate nodes S j Cluster head competition weight, W j Is a candidate node S j Current residual energy of R x Energy expenditure, Q, for transmitting an overhead power transmission line indicator packet for a set sensor node x The set sensor node receives the energy cost of an index data packet of the overhead power transmission line, N j Is a candidate node S j Number of sensor nodes, Q, in the sub-area of the transmission line jmax Is a candidate node S j Maximum communication radius of D (S) j ,S s ) Is a candidate node S j And base station 2S s A distance between, D (S) j ,S jk ) Is a candidate node S j Distance between its kth neighbor node, n j Is a candidate node S j The neighbor information list of (2) contains the number of neighbor nodes, mu 1 、μ 2 Is a set weight coefficient and satisfies 1>μ 1 >μ 2 >0；
(3) And the candidate node with the largest cluster head competition weight is selected as the cluster head node.
The embodiment provides a routing election mechanism of cluster head nodes, which comprehensively considers the energy consumption and the distance of the sensor nodes, so that the elected cluster head nodes can be closer to the member monitoring nodes while meeting the energy consumption requirement, and the reduction of the communication energy consumption among the sensor nodes is facilitated;
the embodiment also enables the elected cluster head nodes to be close to the base station 2 as much as possible on the premise of ensuring the energy consumption requirement, so that the forwarding communication cost of the index data of the overhead power transmission line is favorably reduced, the communication cost of the power transmission line monitoring module 1 can be saved on the whole by the routing election mechanism, and the reliable operation of the power transmission line monitoring module 1 is ensured.
In one embodiment, a cluster head node S is set h Maximum ofCommunication radius of Q h-nax And a distance D (S) from the base station 2 h ,S s ) If 0.8Q h-nax ≥D(S h ,S s ) Then the cluster head node communicates directly with the base station 2, if 0.8Q h-nax <D(S h ,S s ) Then the cluster head node communicates with the base station 2 through a multi-hop form;
in one embodiment, when the cluster head node communicates with the base station 2 in a multi-hop manner, it selects an optimal one as a next-hop node from neighboring cluster head nodes closer to the base station 2, specifically:
the cluster head nodes sort the neighbor cluster head nodes according to the sequence from large distance to small distance from the base station 2, the first two neighbor cluster head nodes are selected and set as S α 、S β If the following condition is satisfied, S h Selection of S β As the next hop node, otherwise, S is selected α As a next hop node:
in the formula, W α Is S α Current residual energy of W β Is S β Current residual energy of H α Is S α Number of member monitoring nodes contained in the cluster, H β Is S β The number of member monitoring nodes contained in the cluster, R x Energy expenditure, Q, for transmitting an overhead power line indicator packet for a set sensor node x The set sensor node receives the energy cost of an index data packet of the overhead power transmission line, and the delta R is a set proportional threshold.
In the embodiment, the life cycle of the relay node and the distance between the relay node and the base station 2 are used as the balance factors for selecting the next hop node, the neighbor cluster head node closest to the base station 2 is preferentially selected as the next hop node, and only when the life cycle is far greater than that of the neighbor cluster head node closest to the base station 2, the neighbor cluster head node closest to the base station 2 is selected as the next hop node, so that the energy consumption of index data transmission of the overhead power transmission line can be reduced;
the selection strategy of the next hop node is beneficial to improving the utilization rate of the energy of the sensor node on the whole and balancing the total energy consumption of the power transmission line monitoring module 1, so that a good foundation is laid for the stable operation of the overhead power transmission line on-line monitoring system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. Overhead power transmission line on-line monitoring system, characterized by includes:
the power transmission line monitoring module is used for collecting the index data of the overhead power transmission line from the overhead power transmission line and wirelessly outputting the collected index data of the overhead power transmission line;
the base station is wirelessly connected with the power transmission line monitoring module and is used for receiving and processing the overhead power transmission line index data output by the power transmission line monitoring module and wirelessly outputting the received and processed overhead power transmission line index data;
and the power transmission line monitoring center is in wireless connection with the base station and is used for receiving and processing the index data of the overhead power transmission line output by the base station and obtaining a monitoring result.
2. The overhead power transmission line on-line monitoring system according to claim 1, wherein the base station includes:
the short-distance wireless communication unit is used for establishing a wireless communication link with the power transmission line monitoring module, collecting the index data of the overhead power transmission line sent by the power transmission line monitoring module in real time and outputting the collected index data of the overhead power transmission line;
the data analysis unit is coupled with the short-distance wireless communication unit and used for receiving the overhead power transmission line index data output by the short-distance wireless communication unit; analyzing and processing the received index data of the overhead power transmission line, then storing the index data into a memory, and managing and outputting the data;
a remote wireless transmission unit coupled with the data analysis unit, receiving the index data of the overhead power transmission line output by the data analysis unit, establishing a wireless link with the power transmission line monitoring center through a mobile communication network, and transmitting the index data of the overhead power transmission line to the power transmission line monitoring center;
and the power supply unit is used for supplying electric energy to the base station.
3. The overhead power transmission line on-line monitoring system according to claim 1, wherein the power supply unit is a solar power supply unit or an ac power supply unit.
4. The overhead power transmission line on-line monitoring system according to claim 1, wherein the power transmission line monitoring module comprises a plurality of sensor nodes for collecting index data of the overhead power transmission line, and each sensor node is deployed in a set overhead power transmission line monitoring area in a set density λ poisson distribution.
5. The overhead power transmission line on-line monitoring system according to claim 4, wherein when a network is initialized, the overhead power transmission line monitoring area is divided into a plurality of power transmission line monitoring sub-areas, the sensor nodes belonging to the same power transmission line monitoring sub-area determine cluster head nodes through cluster head election, and the remaining sensor nodes serve as member monitoring nodes in a cluster where the cluster head nodes are located, wherein the cluster head nodes are configured to receive and process overhead power transmission line index data acquired by the member monitoring nodes in the cluster, and transmit the processed overhead power transmission line index data to a next hop node or a base station.
6. The overhead power transmission line on-line monitoring system according to claim 5, wherein when cluster head election is performed on sensor nodes belonging to the same power transmission line monitoring sub-area, the following steps are specifically performed:
(1) The sensor node broadcasts self position information to other sensor nodes in the communication range, all the sensor nodes receiving the information are regarded as neighbor nodes of the sensor node, the neighbor information list of the sensor node is updated after the information is received, and an energy threshold value W is set T All residual energy in the rectangular power transmission line monitoring sub-area is greater than an energy threshold value W T Electing the sensor node to become a candidate node;
(2) Each candidate node calculates the cluster head competition weight per se according to the following formula:
in the formula (I), the compound is shown in the specification,representing candidate nodes S j Cluster head competition weight, W j Is a candidate node S j Current residual energy of R x Energy expenditure, Q, for transmitting an overhead power transmission line indicator packet for a set sensor node x The set sensor node receives the energy cost of an index data packet of the overhead power transmission line, N j Is a candidate node S j Number of sensor nodes, Q, in the sub-area of the transmission line jmax Is a candidate node S j Maximum communication radius of D (S) j ,S s ) Is a candidate node S j And base station 2S s A distance therebetween, D (S) j ,S jk ) Is a candidate node S j Distance between its kth neighbor node, n j Is a candidate node S j The neighbor information list of (2) contains the number of neighbor nodes, mu 1 、μ 2 Is a set weight coefficient and satisfies 1>μ 1 >μ 2 >0；
(3) And the candidate node with the maximum cluster head competition weight is selected as the cluster head node.
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| CN202231875U (en) * | 2011-05-27 | 2012-05-23 | 北京国网富达科技发展有限责任公司 | Power transmission line monitoring base station and system |
| CN103017828A (en) * | 2012-12-12 | 2013-04-03 | 宝鸡供电局 | On-line monitoring system of fatigue damage to electric transmission line conductor by breeze vibration |
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2017
- 2017-10-20 CN CN201710987070.4A patent/CN107612589A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1963879A (en) * | 2005-11-07 | 2007-05-16 | 国网北京电力建设研究院 | System and method for detecting online of built on stilts power transmission sequence |
| CN101470014A (en) * | 2008-06-20 | 2009-07-01 | 袁德海 | Integrated on-line monitoring system and method for power transmission line |
| CN102118881A (en) * | 2009-12-31 | 2011-07-06 | 深圳先进技术研究院 | Monitoring device of overhead transmission lines and monitoring method |
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