CN113938938A - Fault positioning method and device for comprehensive energy distribution network - Google Patents
Fault positioning method and device for comprehensive energy distribution network Download PDFInfo
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- CN113938938A CN113938938A CN202111148655.XA CN202111148655A CN113938938A CN 113938938 A CN113938938 A CN 113938938A CN 202111148655 A CN202111148655 A CN 202111148655A CN 113938938 A CN113938938 A CN 113938938A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- 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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Abstract
The invention provides a fault positioning method and a fault positioning device for a comprehensive energy distribution network, which comprise the following steps: establishing a wireless sensor network of the power distribution network; selecting an anchor node in the network; the anchor node transmits broadcast according to a preset communication radius; the power distribution network fault node receives the broadcast of the anchor node and forms a broadcast receiving list; responding to the number of the anchor node broadcasts received in the fault node broadcast receiving list, and when the number of the anchor node broadcasts is larger than or equal to three, obtaining the positioning information of the fault node through a PIT test method and a Bounding Box positioning method; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method. And selecting anchor nodes through a wireless sensor network, and simply and quickly positioning the fault through a PIT test method and/or a Bounding Box positioning method according to the number of anchor node broadcasts received by the fault node.
Description
Technical Field
The invention relates to the technical field of power distribution network fault location, in particular to a comprehensive energy power distribution network fault location method and device.
Background
With the continuous development of new energy construction, for example, wind power generation in the gobi desert in Xinjiang or solar power generation in high altitude areas belong to the category of reasonably utilizing comprehensive energy for construction. In order to utilize the comprehensive energy more reliably and efficiently, on one hand, the development and construction of the comprehensive energy need to be continuously enhanced, and on the other hand, the reliability of the comprehensive energy in the aspect of power transmission needs to be continuously improved. In case of a power distribution network failure, the line has a long operating time in this state, which may cause the voltage to ground on the line without failure to increase continuously, thereby easily causing more serious failure, such as two-phase short circuit, which may result in the temperature of the equipment rising and loss of the electrical equipment. Since the power system fluctuates due to an excessively high voltage, stability and safety of the power system are reduced, and therefore, a fault must be removed or isolated at the fastest speed in order to ensure safe and stable operation of the power system.
When a line fault is confirmed, the existing distribution automation system is mainly focused on the realization of relay protection and switch on-off control, and remote real-time measurement data are less, so that the rapid positioning and isolation recovery processing means after the fault occurs are limited. It has been difficult to meet the efficiency requirements of modern power systems by relying on human labor for fault detection and experience for troubleshooting.
Disclosure of Invention
The invention provides a fault positioning method and device for an integrated energy power distribution network, which are used for solving the defects of low efficiency and poor precision of fault positioning of the integrated energy power distribution network in the prior art and realizing rapid and precise fault positioning.
The invention provides a fault positioning method for a comprehensive energy distribution network, which comprises the following steps:
establishing a wireless sensor network of the power distribution network;
selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule;
the anchor node transmits broadcast according to a preset communication radius;
the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list;
responding to the number of the anchor node broadcasts received in the fault node broadcast receiving list, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of the fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
According to the fault location method for the comprehensive energy distribution network provided by the invention, a plurality of wireless sensors are selected as anchor nodes in the network according to a preset rule, and the fault location method specifically comprises the following steps: and selecting 5-20% of wireless sensors in the network as anchor nodes.
According to the fault location method for the comprehensive energy distribution network provided by the invention, the anchor node transmits the broadcast according to the preset communication radius, and the method specifically comprises the following steps: the anchor node transmits broadcast according to a mode of setting frequency and presetting communication radius; wherein the preset communication radius is twice a communication radius of sensors in the network other than the anchor node.
According to the fault location method for the comprehensive energy distribution network provided by the invention, when the number of the anchor node broadcasts received in the fault node broadcast receiving list is greater than or equal to three in response to the number of the anchor node broadcasts received, a preselected triangular area is obtained through a PIT test method, a preselected first rectangular area is obtained through a Bounding Box location method, and location information of a fault node is obtained in an overlapping area of the preselected triangular area and the preselected first rectangular area, and the fault location method specifically comprises the following steps:
for each corresponding anchor node in the broadcast receiving list received by the fault node
Combining;
selecting an optimal anchor node combination from the anchor node combinations according to a PIT test method, and forming an optimal triangular area by taking each anchor node in the optimal anchor node combination as a vertex; wherein the failed node is located within the optimal triangular region;
taking the optimal triangular area as a pre-selected triangular area;
determining a preselected first rectangular region formed by each anchor node of the optimal anchor node combination according to a Bounding Box positioning method;
obtaining an overlapping area according to the preselected triangular area and the preselected first rectangular area;
determining centroid location information within the overlap region;
and taking the centroid position information as the positioning information of the fault node.
According to the fault location method for the comprehensive energy distribution network provided by the invention, the optimal anchor node combination is selected from the anchor node combinations according to the PIT test method, and each anchor node in the optimal anchor node combination is taken as a vertex to form an optimal triangular area, and the method specifically comprises the following steps:
determining a set of anchor node combinations of which fault nodes are located in a triangular region formed by three anchor nodes;
and selecting the anchor node combination with the smallest area of the formed triangular region from the set of the anchor node combinations as the optimal anchor node combination.
According to the fault location method for the comprehensive energy distribution network provided by the invention, the determination of the set of anchor node combinations of the fault node in the triangular region formed by the three anchor nodes specifically comprises the following steps: and moving the fault node to a set direction, and when the strengths of the broadcast signals of the three anchor nodes of the anchor node combination received by the fault node after moving are enhanced or weakened, determining that the fault node is positioned outside a triangular area formed by the anchor node combination, otherwise, determining that the fault node is positioned in the triangular area formed by the anchor node combination.
According to the fault location method for the comprehensive energy distribution network provided by the invention, the preselected first rectangular region formed by each anchor node of the optimal anchor node combination is determined according to the sounding Box location method, and the method specifically comprises the following steps:
respectively forming anchor node broadcast circular areas by taking each anchor node of the optimal anchor node combination as a circle center and taking the preset communication radius of the anchor node as a radius;
determining a circumscribed square of each of the circular regions;
and taking the overlapping area of the circumscribed squares of each anchor node of the optimal anchor node combination as the pre-selected first rectangular area.
According to the fault location method for the comprehensive energy distribution network provided by the invention, when the number of anchor node broadcasts received in the fault node broadcast receiving list is less than three in response to the number of anchor node broadcasts received in the fault node broadcast receiving list, the location information of the fault node is determined by a Bounding Box location method, and the method specifically comprises the following steps:
and the fault node responds to the broadcast of one anchor node, and takes the position information of the anchor node corresponding to the received broadcast as the positioning information of the fault node.
According to the fault location method for the comprehensive energy distribution network provided by the invention, when the number of anchor node broadcasts received in the fault node broadcast receiving list is less than three in response to the number of anchor node broadcasts received in the fault node broadcast receiving list, the location information of the fault node is determined by a Bounding Box location method, and the method specifically comprises the following steps:
the fault node responds to the broadcasts of the two anchor nodes, and two anchor node broadcast circular areas are formed by respectively taking the two anchor nodes corresponding to the received broadcasts as circle centers and the preset communication radius of the anchor nodes as the radius through a sounding Box test method;
determining a circumscribed square of two of the circular regions;
taking the overlapping area of the two circumscribed squares as a preselected second rectangular area;
and determining centroid position information in the preselected second rectangular area, and using the centroid position information as the positioning information of the fault node.
The invention also provides a fault positioning device for the comprehensive energy distribution network, which comprises the following components:
the sensor network establishing unit is used for establishing a wireless sensor network of the power distribution network;
the anchor node determining unit is used for selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule;
a signal transmitting unit, configured to transmit a broadcast by the anchor node according to a preset communication radius;
the signal receiving unit is used for receiving the broadcast of the anchor node in a preset receiving range by the fault node of the power distribution network and forming a broadcast receiving list;
the fault node positioning unit is used for responding to the number of the anchor node broadcasts received in the fault node broadcast receiving list, acquiring a preselected triangular area through a PIT test method when the number of the received anchor node broadcasts is more than or equal to three, acquiring a preselected first rectangular area through a Bounding Box positioning method, and acquiring positioning information of a fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
According to the method and the device for positioning the fault of the comprehensive energy power distribution network, the wireless sensor network is established for the sensors in the power distribution network, part of the sensors are selected from the network as anchor nodes, and the positioning of the fault nodes in the wireless sensor network of the power distribution network is simply and quickly realized through a PIT test method or an improved non-ranging node positioning method based on a Bounding Box according to the number of anchor node broadcasts received by the fault nodes, so that the fault positioning efficiency and the fault positioning precision are improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for locating a fault in an integrated energy distribution network according to the present invention;
fig. 2 is a flowchart of a processing method in fig. 1 corresponding to step 150 when the number of anchor node broadcasts received by the failed node is greater than or equal to three;
FIG. 3 is a flowchart of a specific method of step 220 of FIG. 2;
fig. 4 is a schematic structural diagram of the fault node position determination performed by applying the PIT test method in step 310 in fig. 3;
FIG. 5 is a flowchart of a specific method of step 240 in FIG. 2;
FIG. 6 is a schematic diagram illustrating the structure of the determination of the overlap region in step 250 of FIG. 2;
FIG. 7 is a flowchart of a method of processing in FIG. 1 corresponding to step 150 when the number of anchor node broadcasts received by the failed node is two;
FIG. 8 is one of the effect diagrams of simulation experiments of the method for locating the fault of the comprehensive energy distribution network provided by the invention;
FIG. 9 is a second simulation experiment effect diagram of the method for locating faults of the comprehensive energy distribution network provided by the invention;
FIG. 10 is a third simulation experiment effect diagram of the comprehensive energy distribution network fault location method provided by the invention;
FIG. 11 is a fourth simulation experiment effect diagram of the comprehensive energy distribution network fault location method provided by the invention;
FIG. 12 is a schematic structural diagram of an integrated energy distribution network fault locating device provided by the invention;
fig. 13 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the development of power electronic technology, sensors and wireless communication technology, wireless sensor networks are also gradually applied in many fields. The wireless sensor network is composed of a plurality of sensor nodes, and has the advantages of low power consumption, low cost, distributed processing, high monitoring precision, high fault tolerance, large coverage area, remote measurement and control, self-organization, multi-hop and the like. And the network plays the dual identities of a terminal and a route to form a multi-hop network, and finally, data is transmitted to a control center for the control center to accurately position equipment. In the distributed power generation process, due to the fact that the environment of a monitoring area is severe and the range is wide, only a few devices are provided with sensor nodes with GPS, the positions of most devices are unknown, and in order to save cost, most researches improve the positioning accuracy by improving application software of the sensor nodes. The working principle of sensor node positioning is that a plurality of wireless sensor nodes are distributed in a distribution line network, each node receives current information of the position, so that the problem which is not found in the distribution line is reflected quickly and accurately, the fault analysis is carried out on the problem, a microcomputer is used for processing the information, the information is sent to a worker by adopting a wireless communication method, and the purpose of removing or isolating the fault at the highest speed is achieved.
The embodiment of the invention provides a fault positioning method for a comprehensive energy distribution network, which comprises the following steps:
step 110: establishing a wireless sensor network of the power distribution network;
specifically, a wireless sensor network is established through a gateway, the network is initialized, and a network period is set.
For example, a network is established containing 300 sensors and the network area is set to be 1000 meters on a side.
Step 120: selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule;
specifically, 5% -20% of wireless sensors in the network are selected as anchor nodes.
Step 130: the anchor node transmits broadcast according to a preset communication radius;
specifically, the anchor node transmits a broadcast in a manner of setting a frequency and a preset communication radius; wherein the preset communication radius is twice a communication radius of sensors in the network other than the anchor node.
Specifically, the broadcast information transmitted by the anchor node includes information such as coordinates (x, y) of the location of the anchor node and an ID number of the anchor node.
Step 140: the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list;
step 150: responding to the number of the anchor node broadcasts received In the fault node broadcast receiving list, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT (perfect Point In Triangulation test) test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of a fault node In an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
Specifically, when the number of anchor node broadcasts received in the failed node broadcast reception list is greater than or equal to three, as shown in fig. 2, the method specifically includes:
step 210: to each anchor node corresponding to the broadcast receiving list of the fault node
Combining;
step 220: selecting an optimal anchor node combination from the anchor node combinations according to a PIT test method, and forming an optimal triangular area by taking each anchor node in the optimal anchor node combination as a vertex; wherein the failed node is located within the optimal triangular region;
as shown in fig. 3, the present step specifically includes:
step 310: determining a set of anchor node combinations of which fault nodes are located in a triangular region formed by three anchor nodes;
specifically, the fault node is moved to a set direction, when the strengths of broadcast signals of three anchor nodes of an anchor node combination received by the fault node after movement are all enhanced or all weakened, the fault node is considered to be located outside a triangular area formed by the anchor node combination, otherwise, the fault node is considered to be located inside the triangular area formed by the anchor node combination.
As shown in fig. 4, the method for determining whether a failure node is in a triangular area formed by three anchor nodes by the PIT test method is as follows: if there is a direction along which movement causes the signal of anchor node A, B, C received by failed node M to be simultaneously enhanced or attenuated, then point M is located outside Δ ABC, whereas if the signal of anchor node A, B, C received by failed node M is not simultaneously enhanced or attenuated but the signal of received partial anchor nodes is enhanced, and the signal of received partial anchor nodes is attenuated, then point M is located inside Δ ABC. As shown in the left diagram of fig. 4, when point M moves in the direction of the arrow in the diagram, the signal strength of anchor node a received by point M increases and the signal strength of anchor node B, C received by point M decreases, so point M is located in the inner region of Δ ABC; in the right diagram of fig. 4, when point M moves in the direction of the arrow in the diagram, the signal strength of anchor point A, B, C received by point M decreases at the same time, and therefore point M is located outside Δ ABC.
Step 320: and selecting the anchor node combination with the smallest area of the formed triangular region from the set of the anchor node combinations as the optimal anchor node combination.
Step 230: taking the optimal triangular area as a pre-selected triangular area;
step 240: determining a preselected first rectangular region formed by each anchor node of the optimal anchor node combination according to a Bounding Box positioning method;
specifically, the sounding Box positioning method is a distributed node positioning algorithm requiring distance measurement, and the method is relatively simple to implement and only requires connectivity information of a known network.
As shown in fig. 5, the present step specifically includes:
step 510: respectively forming anchor node broadcast circular areas by taking each anchor node of the optimal anchor node combination as a circle center and taking the preset communication radius of the anchor node as a radius;
step 520: determining a circumscribed square of each of the circular regions;
step 530: and taking the overlapping area of the circumscribed squares of each anchor node of the optimal anchor node combination as the pre-selected first rectangular area.
Step 250: obtaining an overlapping area according to the preselected triangular area and the preselected first rectangular area;
specifically, assuming that the preselected triangular regions are determined according to step 230, and the anchor nodes of the preselected triangular regions are combined to form the anchor node A, B, C, as shown in fig. 6, the anchor node A, B, C is used as the center of a circle, the preset communication radius R is used as the radius to form a broadcast circular region, the circumscribed squares of the broadcast circular region are determined, the restart region rectangle DEFG is determined as the preselected first rectangular region according to the three circumscribed squares, and then the overlapping region polygon HBIJK of the rectangle DEFG region and the Δ ABC region is obtained.
Step 260: determining centroid location information within the overlap region;
specifically, the polygon HBIJK in the above example is the overlapping area, and the centroid position is obtained.
Step 270: and taking the centroid position information as the positioning information of the fault node.
In step 150, when the number of anchor node broadcasts received in the broadcast reception list of the failed node is less than three, determining the location information of the failed node by using a sounding Box location method, specifically including: and the fault node responds to the broadcast of one anchor node, and takes the position information of the anchor node corresponding to the received broadcast as the positioning information of the fault node.
In step 150, when the number of anchor node broadcasts received in the broadcast receiving list of the failed node is less than three, the locating information of the failed node is determined by a sounding Box locating method, and the failed node responds to the broadcasts of the two anchor nodes, as shown in fig. 7, which specifically includes:
step 710: forming two anchor node broadcast circular areas by respectively taking two anchor nodes corresponding to the received broadcast as circle centers and taking the preset communication radius of the anchor nodes as a radius through a Bounding Box positioning method;
step 720: determining a circumscribed square of two of the circular regions;
step 730: taking the overlapping area of the two circumscribed squares as a preselected second rectangular area;
step 740: and determining centroid position information in the preselected second rectangular area, and using the centroid position information as the positioning information of the fault node.
The positioning method provided by the embodiment of the invention integrates a Bounding Box positioning method and a PIT method, determines unknown position equipment through a small amount of equipment (anchor nodes) with known positions, quickly diagnoses the position of a fault point and improves the positioning accuracy.
Compared with the prior art, the application of the Wireless Sensor Network (WSN) technology in the comprehensive energy distribution network has feasibility and reliability, and simultaneously has the following advantages:
1) the monitoring area is large, the problem of difficult wired monitoring and wiring is caused due to the wide range and the complex and changeable terrain of the comprehensive energy distribution network, the problems can be solved by adopting a Wireless Sensor Network (WSN) technology, meanwhile, the nodes are widely distributed, information can be sensed from different directions and transmitted to the terminal, and the basic requirement of fault monitoring of the comprehensive energy distribution network is fully met;
2) the wireless sensor node has the functions of data acquisition, data processing, wireless communication and the like, replaces the traditional complex acquisition and communication device, and does not need complex wiring by adopting wireless communication; the wireless sensor node is low in energy consumption through an induction electricity taking or battery power supply mode, can maintain a longer life cycle, and improves the reliability of the system;
3) the method is simple and reliable, fault location can be carried out only according to the amplitude and the phase of the zero-sequence current, and the sensor node only needs to sample the current before and after the fault, so that the data acquisition work is greatly reduced; and the sensor node is only responsible for data acquisition and communication, and the analysis and processing of data and fault location are responsible for by the surveillance center, and the influence factor is few, has improved the accuracy of result.
4) By using the sounding Box positioning method, data inaccuracy caused by the fact that the node is affected by various severe environment conditions or devices are damaged due to various reasons during actual operation is avoided, and the speed and accuracy of fault positioning are improved.
As shown in fig. 8-11, a comparison graph of experimental results of simulation experiments performed on the positioning method and the other two methods according to the embodiment of the present invention is shown. In this experiment, the ratio of anchor nodes to normal nodes was changed from 5% to 20% and its effect on positioning accuracy in different non-ranging positioning algorithms was studied. In FIG. 8, the mean positioning error of the Bounding Box-PIT method, the Bounding Box method, and the DV-Hop method are shown. It was observed that the anchor node optimum was about 15%, and higher anchor node ratios resulted in only high communication energy costs and slow convergence of the algorithm. Because more anchor nodes fill the network, a part of the anchor nodes are locally gathered, and the anchor node connection graph has a superposition part, so that higher positioning errors are caused. Fig. 8 shows that the Bounding Box-PIT method is superior to other methods when the anchor nodes are evenly distributed throughout the network.
FIGS. 9-11 are comparisons of average positioning errors for three methods with the same sensor node distribution location, node radius, and anchor node ratio. The number of sensor nodes is 300, the simulation area is 1000 multiplied by 1000, the node radius R is 30, and the anchor node ratio is 10%. FIG. 9 is a simulation of the Bounding Box-PIT method, with an average positioning error of 0.18R, and FIGS. 10 and 11 are sequentially the Bounding Box method and the DV-Hop method, with an average positioning error of 0.21R, 0.24R. Therefore, the positioning error of the Bounding Box-PIT method provided by the invention is obviously lower than that of the other two methods.
The comprehensive energy distribution network fault locating device provided by the embodiment of the invention is described below, the comprehensive energy distribution network fault locating device described below and the distribution network fault locating method described above can be referred to correspondingly, as shown in fig. 12, and the embodiment of the invention provides a comprehensive energy distribution network fault locating device, which includes:
a sensor network establishing unit 1210, configured to establish a wireless sensor network of a power distribution network;
an anchor node determining unit 1220, configured to select multiple wireless sensors as anchor nodes in the network according to a preset rule;
specifically, the anchor node determining unit 1220 selects, as the anchor node, 5% to 20% of the number of wireless sensors in the network.
A signal transmitting unit 1230, configured to transmit a broadcast according to a preset communication radius by the anchor node;
specifically, the anchor node of the signal transmitting unit 1230 transmits a broadcast in a manner of setting a frequency and a preset communication radius; wherein the preset communication radius is twice a communication radius of sensors in the network other than the anchor node.
A signal receiving unit 1240, configured to receive, by a faulty node of the power distribution network, a broadcast of an anchor node within a preset receiving range, and form a broadcast receiving list;
a faulty node positioning unit 1250, configured to respond to the number of anchor node broadcasts received in the faulty node broadcast reception list, and when the number of received anchor node broadcasts is greater than or equal to three, obtain a preselected triangular region by using a PIT test method, obtain a preselected first rectangular region by using a Bounding Box positioning method, and obtain positioning information of a faulty node in an overlapping region of the preselected triangular region and the preselected first rectangular region; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
Specifically, when the number of anchor node broadcasts received in the failed node broadcast reception list is equal to or greater than three, the failed node locating unit 1250 further includes:
an anchor node combination subunit, configured to make a response to each anchor node in the broadcast reception list received by the failed node
Combining;
an optimal anchor node combination determining subunit, configured to select an optimal anchor node combination from the anchor node combinations according to a pit (perfect Point In triangle test) testing method, and form an optimal triangle area with each anchor node In the optimal anchor node combination as a vertex; wherein the failed node is located within the optimal triangular region;
wherein the optimal anchor node combination determination subunit includes:
the anchor node combination set determining subunit is used for determining a set of anchor node combinations of which the fault node is located in a triangular region formed by the three anchor nodes;
specifically, the anchor node combination set determining subunit moves the fault node to the set direction, and when the strengths of broadcast signals of three anchor nodes of the anchor node combination received by the fault node after movement are all enhanced or all weakened, the fault node is considered to be located outside a triangular area formed by the anchor node combination, otherwise, the fault node is considered to be located inside the triangular area formed by the anchor node combination.
And the triangle with the smallest area determining subunit is used for selecting the anchor node combination with the smallest area of the formed triangle region from the anchor node combination set as the optimal anchor node combination.
A preselected triangular region determining subunit, configured to use the optimal triangular region as a preselected triangular region;
a preselected first rectangular region determining subunit, configured to determine, according to a Bounding Box positioning method, a preselected first rectangular region formed by each anchor node of the optimal anchor node combination;
wherein the pre-selecting the first rectangular area determining subunit includes:
the three anchor node broadcast circular area determining subunits are used for respectively forming anchor node broadcast circular areas by taking each anchor node of the optimal anchor node combination as a circle center and taking the preset communication radius of the anchor node as a radius;
three round circumscribed square determining subunits used for determining the circumscribed square of each round area;
and the three circumscribed square overlapping region determining subunits are used for taking the overlapping region of the circumscribed squares of each anchor node of the optimal anchor node combination as the preselected first rectangular region.
The overlapping area determining subunit is used for obtaining an overlapping area according to the preselected triangular area and the preselected first rectangular area;
an overlap region centroid determining subunit configured to determine centroid position information within the overlap region;
and the positioning determining subunit is used for taking the centroid position information as the positioning information of the fault node.
Specifically, when the number of received anchor node broadcasts in the failed node broadcast reception list is equal to one, the failed node location unit 1250 takes the location information of the anchor node corresponding to the received broadcast as the location information of the failed node.
Specifically, when the number of anchor node broadcasts received in the failed node broadcast reception list is equal to two, the failed node locating unit 1250 further includes:
the two anchor node broadcast circular area determining subunits are used for responding to the broadcast of the two anchor nodes by the fault node, and forming two anchor node broadcast circular areas by respectively taking the two anchor nodes corresponding to the received broadcast as circle centers and taking the preset communication radius of the anchor nodes as a radius through a sounding Box positioning method;
the two circumscribed square determining subunits are used for determining the circumscribed squares of the two circular areas;
the two circumscribed square overlapping region determining subunit is used for taking the overlapping region of the two circumscribed squares as a preselected second rectangular region;
and the second rectangular area centroid determining subunit is used for determining centroid position information in the preselected second rectangular area and using the centroid position information as the positioning information of the fault node.
An entity structure schematic diagram of an electronic device provided in an embodiment of the present invention is described below with reference to fig. 11, and as shown in fig. 11, the electronic device may include: a processor (processor)1310, a communication Interface (Communications Interface)1320, a memory (memory)1330 and a communication bus 1340, wherein the processor 1310, the communication Interface 1320 and the memory 1330 communicate with each other via the communication bus 1340. The processor 1310 may invoke logic instructions in the memory 1330 to perform a method for integrated energy distribution grid fault location, the method comprising: establishing a wireless sensor network of the power distribution network; selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule; the anchor node transmits broadcast according to a preset communication radius; the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list; responding to the number of anchor node broadcasts received by a fault node, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of the fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
In addition, the logic instructions in the memory 1330 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, an embodiment of the present invention further provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the method for locating a fault in an integrated energy distribution network provided by the above methods, where the method includes: establishing a wireless sensor network of the power distribution network; selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule; the anchor node transmits broadcast according to a preset communication radius; the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list; responding to the number of anchor node broadcasts received by a fault node, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of the fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
In still another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to perform the method for locating a fault in an integrated energy distribution network provided in each of the above: establishing a wireless sensor network of the power distribution network; selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule; the anchor node transmits broadcast according to a preset communication radius; the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list; responding to the number of anchor node broadcasts received by a fault node, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of the fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fault positioning method for an integrated energy distribution network is characterized by comprising the following steps:
establishing a wireless sensor network of the power distribution network;
selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule;
the anchor node transmits broadcast according to a preset communication radius;
the fault node of the power distribution network receives the broadcast of the anchor node within a preset receiving range and forms a broadcast receiving list;
responding to the number of the anchor node broadcasts received in the fault node broadcast receiving list, when the number of the received anchor node broadcasts is more than or equal to three, obtaining a preselected triangular area through a PIT test method, obtaining a preselected first rectangular area through a Bounding Box positioning method, and obtaining positioning information of the fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
2. The method according to claim 1, wherein the selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule specifically comprises: and selecting 5-20% of wireless sensors in the network as anchor nodes.
3. The method for locating the fault in the integrated energy distribution network according to claim 1, wherein the anchor node transmits a broadcast according to a preset communication radius, and specifically comprises: the anchor node transmits broadcast according to a mode of setting frequency and presetting communication radius; wherein the preset communication radius is twice a communication radius of sensors in the network other than the anchor node.
4. The method according to claim 1, wherein in response to the number of anchor node broadcasts received in the fault node broadcast reception list, when the number of anchor node broadcasts received is greater than or equal to three, a preselected triangular area is obtained by a PIT test method, a preselected first rectangular area is obtained by a Bounding Box positioning method, and positioning information of a fault node is obtained in an overlapping area of the preselected triangular area and the preselected first rectangular area, specifically comprising:
for each corresponding anchor node in the broadcast receiving list received by the fault node
Combining;
selecting an optimal anchor node combination from the anchor node combinations according to a PIT test method, and forming an optimal triangular area by taking each anchor node in the optimal anchor node combination as a vertex; wherein the failed node is located within the optimal triangular region;
taking the optimal triangular area as a pre-selected triangular area;
determining a preselected first rectangular region formed by each anchor node of the optimal anchor node combination according to a Bounding Box positioning method;
obtaining an overlapping area according to the preselected triangular area and the preselected first rectangular area;
determining centroid location information within the overlap region;
and taking the centroid position information as the positioning information of the fault node.
5. The method according to claim 4, wherein the method for locating the fault in the distribution network using the comprehensive energy sources selects an optimal anchor node combination from the anchor node combinations according to a PIT test method, and forms an optimal triangular region by using each anchor node in the optimal anchor node combination as a vertex, specifically comprises:
determining a set of anchor node combinations of which fault nodes are located in a triangular region formed by three anchor nodes;
and selecting the anchor node combination with the smallest area of the formed triangular region from the set of the anchor node combinations as the optimal anchor node combination.
6. The method according to claim 5, wherein the determining the set of anchor node combinations with the fault node located in the triangular region formed by the three anchor nodes specifically comprises: and moving the fault node to a set direction, and when the strengths of the broadcast signals of the three anchor nodes of the anchor node combination received by the fault node after moving are enhanced or weakened, determining that the fault node is positioned outside a triangular area formed by the anchor node combination, otherwise, determining that the fault node is positioned in the triangular area formed by the anchor node combination.
7. The method according to claim 4, wherein the determining a preselected first rectangular region formed by each anchor node of the optimal anchor node combination according to the Bounding Box locating method specifically comprises:
respectively forming anchor node broadcast circular areas by taking each anchor node of the optimal anchor node combination as a circle center and taking the preset communication radius of the anchor node as a radius;
determining a circumscribed square of each of the circular regions;
and taking the overlapping area of the circumscribed squares of each anchor node of the optimal anchor node combination as the pre-selected first rectangular area.
8. The method according to claim 1, wherein the determining, by a sounding Box positioning method, the positioning information of the fault node when the number of anchor node broadcasts received in the fault node broadcast reception list is less than three in response to the number of anchor node broadcasts received in the fault node broadcast reception list specifically includes:
and the fault node responds to the broadcast of one anchor node, and takes the position information of the anchor node corresponding to the received broadcast as the positioning information of the fault node.
9. The method according to claim 1, wherein the determining, by a sounding Box positioning method, the positioning information of the fault node when the number of anchor node broadcasts received in the fault node broadcast reception list is less than three in response to the number of anchor node broadcasts received in the fault node broadcast reception list specifically includes:
the fault node responds to the broadcasts of the two anchor nodes, and two anchor node broadcast circular areas are formed by respectively taking the two anchor nodes corresponding to the received broadcasts as circle centers and the preset communication radius of the anchor nodes as the radius through a sounding Box positioning method;
determining a circumscribed square of two of the circular regions;
taking the overlapping area of the two circumscribed squares as a preselected second rectangular area;
and determining centroid position information in the preselected second rectangular area, and using the centroid position information as the positioning information of the fault node.
10. The utility model provides a comprehensive energy distribution network fault locating device which characterized in that includes:
the sensor network establishing unit is used for establishing a wireless sensor network of the power distribution network;
the anchor node determining unit is used for selecting a plurality of wireless sensors as anchor nodes in the network according to a preset rule;
a signal transmitting unit, configured to transmit a broadcast by the anchor node according to a preset communication radius;
the signal receiving unit is used for receiving the broadcast of the anchor node in a preset receiving range by the fault node of the power distribution network and forming a broadcast receiving list;
the fault node positioning unit is used for responding to the number of the anchor node broadcasts received in the fault node broadcast receiving list, acquiring a preselected triangular area through a PIT test method when the number of the received anchor node broadcasts is more than or equal to three, acquiring a preselected first rectangular area through a Bounding Box positioning method, and acquiring positioning information of a fault node in an overlapping area of the preselected triangular area and the preselected first rectangular area; and when the number of the received anchor node broadcasts is less than three, determining the positioning information of the fault node by a sounding Box positioning method.
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