Line anomaly detection system based on high-voltage telegraph pole and abnormal point detection method thereof

Abstract

The invention discloses a line anomaly detection system based on a high-voltage telegraph pole and an abnormal point detection method thereof, the line anomaly detection system based on the high-voltage telegraph pole comprises a starting node, a terminal node, a first transducer and a second transducer; the first transducer is arranged on a starting node and located at the starting end of the power transmission line, and the second transducer is arranged on a terminal node and located at the ending end of the power transmission line; the first transducer and the second transducer periodically send ultrasonic signals to each other; ultrasonic signals received by the first transducer and the second transducer are detected, when the intensity of the received ultrasonic signals is smaller than a preset threshold value, an alarm is given, and it is indicated that an abnormal condition exists in the power transmission line. The invention provides the line anomaly detection system based on the high-voltage telegraph pole and the anomaly point detection method thereof, which can accurately judge whether the line anomaly point exists or not.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage electric poles, and in particular to a line anomaly detection system based on high-voltage electric poles and an abnormal point detection method thereof. Background Art

[0002] Detection of abnormal points in the line is a task that power companies need to spend a lot of manpower and material resources to detect. It is mainly to check whether there is a break in the line between each high-voltage power pole; if there is a break in the line, it will not only cause power outages for users, but also easily generate electric sparks at the broken part, thus causing fire. For this reason, power supply companies need to spend a lot of manpower to check abnormal points in the line.

[0003] The existing abnormal point detection is done through manual investigation, which is very difficult. Drones are needed to conduct field detection, but drones can only detect cracks on the surface of the line, not the internal rows and columns, and the detection process is also easily affected by dirt on the surface of the line.

[0004] In summary: There is currently a lack of a line anomaly detection system based on high-voltage power poles and an anomaly point detection method on the market that can accurately determine whether there are line anomalies. Summary of the invention

[0005] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a line anomaly detection system based on a high-voltage electric pole, comprising: a starting node, an end node, a first transducer, and a second transducer;

[0007] The starting node and the terminal node are connected via a transmission line, and the starting end and the ending end of each transmission line connecting the starting node and the terminal node are respectively arranged with a first transducer and a second transducer;

[0008] The first transducer is arranged at a starting node, which is located at the starting end of the power transmission line, and the second transducer is arranged at a terminal node, which is located at the ending end of the power transmission line; the first transducer and the second transducer periodically send ultrasonic signals to each other;

[0009] The ultrasonic signals received by the first transducer and the second transducer are detected. When the intensity of the received ultrasonic signals is less than a preset threshold, an alarm is issued, indicating that an abnormal condition exists in the power transmission line.

[0010] The present application places transducers at the starting and ending ends of the transmission line, and then the two transducers send ultrasonic signals to each other, so that the transmission line can be detected. If there are breakpoints or cracks in the transmission line, the ultrasonic signal will be abnormally attenuated, and then the ultrasonic signals received by the first transducer and the second transducer will drop below the preset threshold, thereby issuing a warning in time.

[0011] Furthermore, the preset threshold is the product of an average of signal strengths received by the first transducer and the second transducer and a preset ratio α when the first transducer and the second transducer transmit the same ultrasonic signal strength each time.

[0012] The preset threshold is set to be related to the strength of the ultrasonic signal, which can minimize the impact of line aging, thermal expansion and contraction, etc. on the preset threshold. For example, in a high temperature environment and a low temperature environment, the attenuation rate of the transmission line to ultrasound is different, and the corresponding preset threshold should be set differently. However, the present application controls the preset threshold based on the signal strength of the ultrasonic signal. In the summer when the temperature is high, after the attenuation rate of the transmission line increases, the average value of the corresponding ultrasonic signal will decrease, and the preset threshold will also decrease accordingly.

[0013] Furthermore, the preset ratio α is less than 0.8.

[0014] Further, the first transducer is connected to the start node signal, and the second transducer is connected to the end node signal.

[0015] There is a signal connection between the end node and the start node, and both the end node and the start node have built-in MCUs, so the first transducer and the second transducer are respectively connected to the start node and the end node by signal, and can also work synchronously.

[0016] Furthermore, the first transducer includes a vibration source and a signal connector, the vibration source and the signal connector are signal-connected, the vibration source is used to generate vibration to output an ultrasonic signal, the signal connector is used to control the vibration source to generate an ultrasonic signal of a desired intensity, and the signal connector is connected to an end node or a starting node.

[0017] Furthermore, a through hole is provided on the first transducer, and the power transmission line passes through the through hole. An insulating material is provided in the through hole so that the power transmission line can contact the signal connector of the first transducer.

[0018] The transmission line passes through the through hole, so that the first transducer can evenly transmit ultrasonic signals to the transmission line, or receive ultrasonic signals on the transmission line.

[0019] As a second aspect of the present application, a method for detecting abnormal points is provided, which is applied to the aforementioned line abnormality detection system based on high-voltage electric poles, and is characterized in that it comprises the following steps:

[0020] Step 1: The first transducer periodically sends an ultrasonic signal with an intensity of A to the second transducer at a time interval T1. The second transducer receives the ultrasonic signal sent by the first transducer and calculates an average value A' of the signal intensity of the received ultrasonic signal.

[0021] Step 2: The second transducer periodically sends an ultrasonic signal with a strength of B to the first transducer at a time interval T2. The first transducer receives the ultrasonic signal sent by the second transducer and calculates an average value B' of the signal strength of the received ultrasonic signal.

[0022] Step 3: When the signal strength of the ultrasonic signal received by the first transducer is less than αB', or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node sends an alarm message to the server indicating that an abnormal access point appears on the line where the first transducer and the second transducer are located;

[0023] Step 4: When the signal strength of the ultrasonic signal received by the first transducer is less than αB'; or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node controls the first ultrasonic wave and the second ultrasonic wave as signal sources respectively, and sends a signal once to calculate the location of the abnormal access point.

[0024] This application allows the first transducer and the second transducer to respectively send and receive signals, so as to detect the detection points more accurately and ensure the accuracy of comparative detection. In addition, the first transducer sends signals and the second transducer receives signals. When the abnormal point is close to the second transducer, because the ultrasonic signal has been severely attenuated on the transmission line, when it is attenuated at the abnormal point, the attenuation of the abnormal point is not obvious. The first transducer and the second transducer are both used as signal sources, so this problem can be avoided.

[0025] Further, step 4 includes the following steps:

[0026] Step 41: Calculate the forward attenuation rate a of the transmission line before it is connected to the abnormal detection point, where a=(A-A') / L;

[0027] Step 42: Calculate the reverse attenuation rate a' before the transmission line is connected to the abnormal detection point, a' = (B-B') / L;

[0028] Step 43: After the abnormal access point is found, the first transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of C, then equation 1 is obtained, which is:

[0029] C=(A-aX1)β-aX2,

[0030] Wherein, X1+X2=L, X1 is the distance between the first transducer and the abnormal access point, X2 is the distance between the second transducer and the abnormal access point, and β is the attenuation rate of the abnormal access point for the ultrasonic signal;

[0031] Step 44: After the abnormal access point is found, the second transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of D, then equation 2 is obtained, and equation 1 is:

[0032] D = (A-a'X2)β-a'X1;

[0033] Combine equation 1, equation 2, and X1+X2=L, calculate the values ​​of X1, X2, and β, and send X1 and X2 to the server.

[0034] By combining equation 1 and equation 2, the present application can roughly infer the location of the abnormal point, thereby reducing the difficulty of troubleshooting and increasing the work efficiency of troubleshooting.

[0035] Furthermore, when the attenuation rate is greater than 50%, a signal is sent to the server indicating that there is a risk of line breakage;

[0036] When the attenuation rate is less than 50%, a signal indicating that a line break point exists is sent to the server.

[0037] By calculating the attenuation rate, it is possible to determine whether it is a break point or abnormal wiring, so that inspection personnel can carry the corresponding tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0039] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0040] In the attached picture:

[0041] Figure 1 It is a schematic diagram of a line anomaly detection system based on high-voltage power poles;

[0042] Figure 2 is a schematic diagram of the structure of a power transmission line and a first transducer;

[0043] Figure 3 is a flow chart of the outlier detection method;

[0044] Figure 4 A flowchart showing the locations of abnormal access points. DETAILED DESCRIPTION

[0045] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0046] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0047] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0048] Reference Figure 1 The line anomaly detection system based on high-voltage electric poles includes a starting node, an end node, a first transducer, and a second transducer; wherein the starting node and the end node are connected via a transmission line, the starting node is the first high-voltage electric pole, and the end node is the second high-voltage electric pole. The first transducer is set on the starting node, located at the starting end of the transmission line, and the second transducer is set on the end node, located at the end of the transmission line; the first transducer and the second transducer periodically send ultrasonic signals to each other;

[0049] The ultrasonic signals received by the first transducer and the second transducer are detected. When the intensity of the received ultrasonic signals is less than a preset threshold, an alarm is issued, indicating that an abnormal condition exists in the power transmission line.

[0050] The preset threshold is the product of the average of the signal strengths received by the first transducer and the second transducer and the preset ratio α when the first transducer and the second transducer transmit the same ultrasonic signal strength each time.

[0051] The preset ratio α is less than 0.8, and the preset ratio is preferably 0.7.

[0052] For example, when the first transducer and the second transducer periodically send 100-dB ultrasonic signals, the ultrasonic signal sent by the first transducer is attenuated by the transmission line, and the ultrasonic signal strength received by the second transducer is 80 decibels. As time goes by, when the first transducer does not change the signal strength, the signal strength of the ultrasonic signal received by the second transducer is 80 decibels; therefore, when the preset ratio is 0.8, the preset threshold is 56 decibels.

[0053] In the case that there are no cracks in the line, the signal strength of the ultrasonic signal that the second transducer can receive is basically consistent, regardless of line aging or thermal expansion and contraction, and will not be less than the preset threshold. If the above-mentioned line aging, thermal expansion and contraction cause the second transducer on the receiving side to receive a lower signal strength, it can be slowly corrected by averaging.

[0054] For example, a transmission line expands due to rising temperatures in summer, which increases the attenuation of ultrasonic signals. As a result, the signal strength received by the second transducer will decrease. Accordingly, the average signal strength received by the first transducer and the second transducer will also decrease, and the preset threshold will also decrease. Therefore, there is no need to consider the impact of transmission line changes on signal transmission over a large time scale.

[0055] The first transducer is connected to the start node signal, and the second transducer is connected to the end node signal.

[0056] The first transducer and the second transducer need to receive ultrasonic signals and generate ultrasonic signals respectively, and also need to transmit power. Therefore, the first transducer and the second transducer are arranged on the transmission line without affecting the transmission capacity of the transmission line.

[0057] To this end, the present application provides the following structures of a first transducer and a second transducer: The second transducer has the same structure as the first transducer, and only the structure of the first transducer is shown here.

[0058] refer to Figure 2 The first transducer includes a vibration source 11 and a signal connector 12. The vibration source 11 is used to generate vibration to output an ultrasonic signal. The signal connector 12 is used to control the vibration source 11 to generate an ultrasonic signal of a desired intensity. The signal connector 12 is connected to an end node or a start node.

[0059] The first transducer is provided with a through hole, and the power transmission line 2 passes through the through hole. Insulating material is provided in the through hole so that the power transmission line can contact the signal connector of the first transducer.

[0060] In this way, through this technical solution, the present application can, on the basis of the existing transmission lines of the starting node and the ending node, respectively set a first transducer and a second transducer connected to the starting node and the ending node signals at both ends of the transmission line connecting the ending node and the starting node.

[0061] refer to Figure 3 ,The abnormal point detection method uses the aforementioned line anomaly detection system based on ,highvoltage electric poles, and can directly detect the location of the ,abnormal signal point.

[0062] The outlier detection method includes the following steps:

[0063] Step 1: The first transducer periodically sends an ultrasonic signal with an intensity of A to the second transducer at a time interval T1. The second transducer receives the ultrasonic signal sent by the first transducer and calculates an average value A' of the signal intensity of the received ultrasonic signal.

[0064] Step 2: The second transducer periodically sends an ultrasonic signal with a strength of B to the first transducer at a time interval T2. The first transducer receives the ultrasonic signal sent by the second transducer and calculates an average value B' of the signal strength of the received ultrasonic signal.

[0065] Step 3: When the signal strength of the ultrasonic signal received by the first transducer is less than αB', or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node sends an alarm message to the server indicating that an abnormal access point appears on the line where the first transducer and the second transducer are located;

[0066] Step 4: When the signal strength of the ultrasonic signal received by the first transducer is less than αB'; or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node controls the first ultrasonic wave and the second ultrasonic wave as signal sources respectively, and sends a signal once to calculate the location of the abnormal access point.

[0067] refer to Figure 4 , step 4 includes the following steps:

[0068] Step 41: Calculate the forward attenuation rate a of the power transmission line before it is connected to the abnormal detection point, where a=(A-A') / L.

[0069] Wherein, L is the distance from the first transducer to the second transducer, which has been measured during installation to implement input data, A is the signal strength periodically sent by the first transducer, and A' is the average strength of the signal received by the second transducer before the abnormal access point is detected.

[0070] Step 42: Calculate the reverse attenuation rate a' before the transmission line is connected to the abnormal detection point, a' = (B-B') / L.

[0071] Step 43: After the abnormal access point is found, the first transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of C, then equation 1 is obtained, which is:

[0072] C=(A-aX1)β-aX2,

[0073] Wherein, X1+X2=L, X1 is the distance between the first transducer and the abnormal access point, X2 is the distance between the second transducer and the abnormal access point, and β is the attenuation rate of the abnormal access point for the ultrasonic signal;

[0074] Step 44: After the abnormal access point is found, the second transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of D, then equation 2 is obtained, and equation 1 is:

[0075] D = (A-a'X2)β-a'X1;

[0076] By combining equation 1, equation 2, and X1+X2=L, the values ​​of X1, X2, and β are calculated.

[0077] In this way, the present application can calculate the values ​​of X1 and X2 through Formula 1 and Formula 2, and determine the attenuation rate of the signal at the abnormal access point, so as to roughly judge the cause of the abnormality based on the attenuation rate.

[0078] When the attenuation rate is relatively large, the transmission line may be broken. If the attenuation rate is relatively small, cracks will appear.

[0079] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A line anomaly detection system based on high-voltage electric poles, comprising: a starting node, an ending node, a first transducer, and a second transducer; The starting node and the terminal node are connected by transmission lines; The first transducer and the second transducer are located at the same end or different ends of the transmission line; The first transducer and the second transducer periodically send ultrasonic signals to each other; The ultrasonic signals received by the first transducer and the second transducer are detected. When the intensity of the received ultrasonic signals is less than a preset threshold, an alarm is issued, indicating that an abnormal condition exists in the power transmission line.

2. The line anomaly detection system based on high-voltage electric poles according to claim 1 is characterized in that: The preset threshold is the product of the average of the signal strengths received by the first transducer and the second transducer and the preset ratio α when the first transducer and the second transducer transmit the same ultrasonic signal strength each time.

3. The line anomaly detection system based on high-voltage electric poles according to claim 2 is characterized in that: The preset ratio α is less than 0.

8.

4. The line anomaly detection system based on high-voltage electric poles according to claim 1 is characterized in that: The first transducer is connected to the starting node signal, and the second transducer is connected to the ending node signal; the first transducer and the second transducer are respectively arranged at the starting end and the ending end of the transmission line.

5. The line anomaly detection system based on high-voltage electric poles according to claim 1 is characterized in that: The first transducer and the second transducer are signal-connected to the starting node or the ending node, and the first transducer and the second transducer are both located at the starting end or the ending end of the transmission line.

6. The line anomaly detection system based on high-voltage electric poles according to claim 5 is characterized in that: The first transducer and the second transducer periodically send ultrasonic signals of different intensities, and determine whether there is an abnormal access point based on the monitoring of the received ultrasonic signals.

7. An abnormal point detection method, applied to a line abnormality detection system based on a high-voltage electric pole according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: The first transducer periodically sends an ultrasonic signal with an intensity of A to the second transducer at a time interval T1. The second transducer receives the ultrasonic signal sent by the first transducer and calculates an average value A' of the signal intensity of the received ultrasonic signal. Step 2: The second transducer periodically sends an ultrasonic signal with a strength of B to the first transducer at a time interval T2. The first transducer receives the ultrasonic signal sent by the second transducer and calculates an average value B' of the signal strength of the received ultrasonic signal. Step 3: Preset the ratio α, when the signal strength of the ultrasonic signal received by the first transducer is less than αB'; or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node or Sending to the server an alarm message indicating that an abnormal access point appears on the line where the first transducer and the second transducer are located; Step 4: When the signal strength of the ultrasonic signal received by the first transducer is less than αB'; or the signal strength of the ultrasonic signal received by the second transducer is less than αA', the starting node controls the first ultrasonic wave and the second ultrasonic wave as signal sources respectively, and sends a signal once to calculate the location of the abnormal access point.

8. The line anomaly detection system based on high-voltage electric poles according to claim 7 is characterized in that: Step 4 includes the following steps: When the first transducer and the second transducer are located at the same end of the transmission line, step 4 comprises the following steps: Step 41: Establish the historical data equation, B=A*αe Step 42: Calculate the reverse attenuation rate a' before the transmission line is connected to the abnormal detection point, a' = (B-B') / L; Step 43: After the abnormal access point is found, the first transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of C, then equation 1 is obtained, which is: C=(A-aX1)β-aX2, Wherein, X1+X2=L, X1 is the distance between the first transducer and the abnormal access point, X2 is the distance between the second transducer and the abnormal access point, and β is the attenuation rate of the abnormal access point for the ultrasonic signal; Step 44: After the abnormal access point is found, the second transducer sends an ultrasonic signal with an intensity of A, and the second transducer receives an ultrasonic signal with an intensity of D, then equation 2 is obtained, and equation 1 is: D = (A-a'X2)β-a'X1; Combine equation 1, equation 2, and X1+X2=L, calculate the values ​​of X1, X2, and β, and send X1 and X2 to the server.

9. The line anomaly detection system based on high-voltage electric poles according to claim 8 is characterized in that: When the attenuation rate is greater than 50%, a signal is sent to the server indicating that the line is at risk of breaking; When the attenuation rate is less than 50%, a signal indicating that a line break point exists is sent to the server.

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