A power line loss detection system

Abstract

The present invention relates to the field of line loss detection technology, and in particular to a power line loss detection system. The system includes a layout module, a collection module, a state monitoring module, a power transmission monitoring module, an analysis module, and a layout adjustment module. The present invention sets a number of sensor nodes on the transmission line to be detected to analyze the monitored current waveform and the standard waveform, obtains the time difference between the peak value of the current waveform and the peak value of the temperature waveform according to the analysis result, and records it as the real-time lag time, analyzes whether there is a sudden increase in current, and associates the overall power loss of the transmission line when the real-time lag time is not within the standard lag time range, accurately analyzes whether there is a sudden increase in current, so as to improve the accuracy of line loss detection, and optimizes the sensor nodes in the monitoring area by counting the proportion of the monitoring area with abnormal power transmission, improves the power transmission efficiency, and then effectively supervises the line loss problem of the transmission line to ensure the efficient and stable operation of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of line loss detection, and in particular to a power line loss detection system. Background Art

[0002] Power grid loss refers to the power loss and loss in various links such as transmission, substation, distribution box and marketing in the process of transmitting electricity from power plants to customers. It is generally the power consumed by the internal components of the distribution network during power conversion and power transmission. If the transmission line planning is inadequate, such as unreasonable layout of sensor nodes, it will lead to circuitous power supply and increase line loss. If the power line loss is serious, it will endanger the stable operation of the power system. Therefore, there is an urgent need for a power line loss detection system to monitor the degree of power line loss in real time and optimize the layout of sensor nodes in time to promote the efficient operation of the power system.

[0003] Patent document with publication number CN105588995B discloses a method for detecting abnormal line loss in an electric power metering automation system, the method comprising: step S1, calculating the daily line loss fluctuation index and the line loss change trend index of each line according to the line loss data table; step S2, respectively judging whether the daily line loss fluctuation index of each line exceeds a first threshold and whether the line loss change trend index of each line exceeds a second threshold; step S3, judging the line whose daily line loss fluctuation index exceeds the first threshold or whose line loss change trend index exceeds the second threshold as an abnormal line loss line; it can be seen that the existing power line loss detection system lacks the time difference for real-time monitoring of power current and temperature changes, resulting in low efficiency of transmission lines. Summary of the invention

[0004] To this end, the present invention provides a power line loss detection system to overcome the problem of low line loss detection efficiency due to lack of accurate analysis of power current and temperature delay in the prior art.

[0005] To achieve the above object, the present invention provides a power line loss detection system, comprising:

[0006] A deployment module is used to divide the transmission line to be detected into a number of monitoring areas and to deploy corresponding sensor nodes in each of the monitoring areas;

[0007] A collection module, which is connected to each of the sensor nodes, and is used to collect state parameters corresponding to each sensor node on the transmission line to be detected, wherein the state parameters include real-time current, real-time voltage and real-time temperature;

[0008] A status monitoring module, which is connected to a plurality of electrical devices and is used to monitor the fault status of each of the electrical devices in real time;

[0009] A power transmission monitoring module, which is connected to the input and output ends of the power transmission line and is used to monitor the current operating status of each power device, wherein the current operating status includes a normal state and a fault state;

[0010] An analysis module, which is connected to the acquisition module, and is used to obtain the real-time temperature, real-time current and real-time voltage of each of the sensor nodes, draw temperature change curves, current change curves and voltage change curves, obtain the time difference between the current change curve and the temperature change curve for analysis, so as to simulate marking the monitoring area where power transmission abnormality occurs;

[0011] Wherein, the analysis module calculates the real-time line loss rate according to the number of simulation markers;

[0012] A deployment adjustment module is connected to the analysis module and is used to determine whether to add a sensor node in the monitoring area after the simulation marking according to the real-time line loss rate.

[0013] Furthermore, the analysis module includes a drawing unit, a time difference acquisition unit, a time difference determination unit and a power analysis unit, wherein:

[0014] The drawing unit is used to draw a curve of the real-time temperature change over time of any of the sensor nodes in a preset acquisition cycle to obtain a temperature change curve, draw a curve of the real-time current change over time to obtain a current change curve, and draw a curve of the real-time voltage change over time to obtain a voltage change curve;

[0015] The time difference acquisition unit is used to acquire the real-time hysteresis duration according to the temperature change curve and the current change curve;

[0016] The time difference determination unit is used to determine the real-time lag duration according to the standard lag duration range;

[0017] The power analysis unit is used to obtain the real-time power loss rate for analysis when the real-time hysteresis time is within the standard hysteresis time range, so as to determine whether power transmission abnormality occurs in the monitoring area corresponding to the sensor node.

[0018] Furthermore, the analysis module further includes a comparison unit, a current analysis unit and a voltage analysis unit, wherein:

[0019] The comparison unit is used to compare the real-time lag time with the standard lag time range;

[0020] The current analysis unit is used to obtain the real-time power current difference for analysis when the real-time hysteresis time is less than or equal to the minimum value of the standard hysteresis time range;

[0021] The voltage analysis unit is used to analyze the waveform similarity of the voltage fluctuation curves of adjacent sensing nodes when the real-time hysteresis time length is greater than the maximum value of the standard hysteresis time length range.

[0022] Furthermore, the current analysis unit includes a history database, a first calculation subunit, a first comparison subunit and a first analysis subunit, wherein:

[0023] The historical database stores the standard power current and the standard power current difference of the power transmission line corresponding to the monitoring area;

[0024] The first calculation subunit is used to calculate the real-time power current difference of the corresponding monitoring area collected by the sensor node;

[0025] The first comparison subunit is used to compare the standard power current difference with the real-time power current difference;

[0026] The first analysis subunit is used to determine that power transmission in the corresponding monitoring area is abnormal when the real-time power current difference is greater than the standard power current difference.

[0027] Furthermore, the voltage analysis unit includes a second calculation subunit, a second comparison subunit and a marking subunit, wherein:

[0028] The second calculation subunit is used to calculate the real-time similarity between the voltage waveform of the sensing node and the adjacent voltage waveform;

[0029] The second comparison subunit is used to compare the standard similarity with the real-time similarity;

[0030] The marking subunit is used to simulate marking the monitoring area when the real-time similarity is less than or equal to the standard similarity.

[0031] Furthermore, the analysis module further includes a line loss statistics unit, and the line loss statistics unit includes a third calculation subunit and a third comparison subunit, wherein:

[0032] The third calculation subunit is used to calculate the real-time line loss rate according to the number of completed simulation marks;

[0033] The third comparison subunit is used to compare the standard line loss rate with the real-time line loss rate to determine whether to add a sensor node in the monitoring area.

[0034] Furthermore, the power analysis unit includes an acquisition subunit and a power determination subunit, wherein:

[0035] The acquisition subunit is used to calculate the real-time power loss rate according to the real-time power between the output end and the input end of the power transmission line to be detected;

[0036] The power determination subunit is used to determine the real-time power loss rate according to the standard power loss rate, and determine whether the transmission line transmission is normal according to the determination result.

[0037] Furthermore, the power analysis unit also includes a loss analysis unit, which is used to obtain the current operating status of each power equipment monitored by the power transmission monitoring module when the real-time power loss rate is greater than the standard power loss rate, and to correct the minimum value of the standard lag time range when each power equipment is in a normal state.

[0038] Furthermore, the formula for correcting the minimum value of the standard hysteresis time range is Tbmin'=Tbmin×[1-(Ws-Wb) / Ws], where:

[0039] Tbmin' is the minimum value of the corrected standard hysteresis time range, Tbmin is the standard hysteresis time, Ws is the real-time power loss rate, and Wb is the standard power loss rate.

[0040] Furthermore, the time difference acquisition unit acquires the peak value of the temperature change curve as the initial timing time, and acquires the peak value of the current change curve as the end timing time, calculates the time difference between the initial timing time and the end timing time, and obtains the real-time lag duration.

[0041] Compared with the prior art, the beneficial effect of the present invention lies in that, by setting a number of sensor nodes on the transmission line to be detected, the sensor nodes are used to monitor the line temperature changes, current changes and voltage changes in real time, by analyzing the monitored current waveform and the standard waveform, the time difference between the current waveform peak and the temperature waveform peak is obtained according to the analysis result and recorded as the real-time lag time to analyze whether there is a sudden increase in current, by associating the power loss at the input and output ends of the transmission line when the real-time lag time is not within the standard lag time, and accurately analyzing whether there is a sudden increase in current, so as to improve the accuracy of line loss detection, by statistically analyzing the proportion of the monitoring area with abnormal transmission, so as to optimize the sensor nodes in the monitoring area, improve the power transmission efficiency, and then effectively supervise the line loss problem of the transmission line to ensure the efficient and stable operation of the power system.

[0042] Furthermore, when the current is stable during the power transmission process, the temperature change of the line will be relatively stable and will not increase suddenly. Therefore, the temperature changes slowly. In this case, the temperature change has little impact on the voltage waveform and the lag time is relatively short. That is, the temperature change will be reflected in the voltage waveform more promptly without much delay. However, when the current increases more, the line temperature will rise faster, which will also make the lag time relatively short. Therefore, when the real-time lag time is less than or equal to the minimum value of the standard lag time range, it is also necessary to consider whether it is caused by a large increase in current, so as to accurately detect the power line loss.

[0043] Furthermore, by comparing the standard power current difference with the real-time power current difference, it is possible to analyze whether the reason for the short real-time lag time is due to a large increase in current. If it is determined that the real-time power current difference is less than or equal to the standard power current difference, it means that the current is stable during the transmission process, and the temperature change of the line is relatively stable, and there will be no sudden increase. Therefore, the temperature change rate is relatively slow. In this case, the temperature change has little effect on the voltage waveform, and the lag time is relatively short. If it is determined that the real-time power supply voltage difference is greater than the standard power supply voltage difference, it means that the actual power current fluctuates greatly. This is because when the current increases more, the line temperature will rise faster, which will also make the lag time relatively short. In this case, it is determined that the corresponding monitoring area has abnormal power transmission, and an early warning prompt is issued.

[0044] Furthermore, by counting the number of monitoring nodes with line loss problems, the proportion of monitoring areas with large line losses in the transmission lines is calculated, thereby optimizing the design and operation parameters of the transmission lines and improving the power transmission efficiency. If the real-time line loss rate is greater than or equal to the standard line loss rate, indicating that the line loss rate is too high, monitoring nodes are added in the area where the line loss rate is too high to more accurately locate and analyze the line loss problem. If the real-time line loss rate is determined to be less than the standard line loss rate, the problem area is located, and a timely warning is issued to remind relevant personnel to carry out repairs and reduce line losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the structure of a power line loss detection system according to an embodiment of the present invention;

[0046] Figure 2 It is a structural schematic diagram of an analysis module according to an embodiment of the present invention;

[0047] Figure 3 It is a structural schematic diagram of a current analysis unit according to an embodiment of the present invention;

[0048] Figure 4 Schematic diagram of the structure of a voltage analysis unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0051] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0052] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] See also Figure 1 As shown, it is a schematic diagram of the structure of a power line loss detection system according to an embodiment of the present invention. The present invention provides a power line loss detection system, comprising:

[0054] A deployment module is used to divide the transmission line to be detected into a number of monitoring areas and to deploy corresponding sensor nodes in each of the monitoring areas;

[0055] A collection module, which is connected to each of the sensor nodes, and is used to collect state parameters corresponding to each sensor node on the transmission line to be detected, wherein the state parameters include real-time current, real-time voltage and real-time temperature;

[0056] A status monitoring module, which is connected to a number of power equipment and is used to monitor the fault status of each of the power equipment in real time. The power equipment includes phase regulators, voltage regulators, and transformers;

[0057] A power transmission monitoring module, which is connected to the input and output ends of the power transmission line and is used to monitor the current operating status of each power device, wherein the current operating status includes a normal state and a fault state;

[0058] An analysis module, which is connected to the acquisition module, and is used to obtain the real-time temperature, real-time current and real-time voltage of each of the sensor nodes, draw temperature change curves, current change curves and voltage change curves, obtain the time difference between the current change curve and the temperature change curve for analysis, so as to simulate marking the monitoring area where power transmission abnormality occurs;

[0059] An adjustment module is arranged, which is connected to the analysis module and is used to add sensor nodes in the monitoring area after the simulation marking according to the analysis result of the analysis module.

[0060] In this embodiment, a number of sensor nodes are set on the transmission line to be detected, and the sensor nodes are used to monitor the line temperature change, current change and voltage change in real time. By analyzing the monitored current waveform and the standard waveform, the time difference between the current waveform peak and the temperature waveform peak is obtained according to the analysis result and recorded as the real-time lag time to analyze whether there is a sudden increase in current. When the real-time lag time is not within the standard lag time, the power loss at the input and output ends of the transmission line is associated to accurately analyze whether there is a sudden increase in current, so as to improve the accuracy of line loss detection. By counting the proportion of the monitoring area with abnormal transmission, the sensor nodes in the monitoring area are optimized to improve the power transmission efficiency, thereby effectively supervising the line loss problem of the transmission line and ensuring the efficient and stable operation of the power system.

[0061] See also Figure 2 As shown, it is a schematic diagram of the structure of the analysis module of an embodiment of the present invention;

[0062] Specifically, the drawing module in the analysis module draws the current change curve and the temperature change curve of any of the sensor nodes in a preset acquisition cycle, the time difference acquisition unit obtains the real-time hysteresis time according to the current change curve and the temperature change curve, and the time difference determination unit determines the real-time hysteresis time according to the standard hysteresis time range.

[0063] If the real-time hysteresis time is less than or equal to the minimum value of the standard hysteresis time range, the current analysis unit obtains the real-time power current difference for analysis;

[0064] If the real-time hysteresis duration is within the standard hysteresis duration range, the power analysis unit obtains the real-time power loss rate for analysis;

[0065] If the real-time hysteresis time is greater than the maximum value of the standard hysteresis time range, a voltage fluctuation curve corresponding to each sensor node is drawn, and the voltage analysis unit analyzes the waveform similarity of the voltage fluctuation curves of adjacent sensor nodes;

[0066] Temperature changes will lag behind current changes because current changes will first cause the line to heat up and then cause temperature changes. Therefore, the standard lag time range in this embodiment represents the time difference between the two curves under normal power transmission conditions. Generally, it is set between 5 minutes and 15 minutes, and is selected and adjusted according to the power system requirements, equipment characteristics and actual conditions.

[0067] In a transmission line, a change in voltage is usually caused by a change in current, and a change in current will cause line losses, thereby generating heat. Therefore, a change in current will first cause a change in line temperature, and then affect the voltage waveform. When the current changes in the transmission line, the line loss caused by resistance will cause the line to heat up, thereby affecting the line temperature. This temperature change will not be immediately reflected in the voltage waveform, because the voltage change is usually affected by the electrical characteristics and transmission delays of the line, resulting in a relatively slow change in the voltage waveform. For example, when the current suddenly increases, the line will generate more heat, causing the temperature to rise. This temperature rise will not be immediately reflected in the voltage waveform, but will have a certain lag time. Therefore, by real-time monitoring of the temperature and current detected by each sensor node, the lag time of the temperature waveform change compared to the voltage waveform change is analyzed to accurately analyze whether the transmission line is stable.

[0068] When the current is stable during the power transmission process, the temperature change of the line will be relatively stable and will not increase suddenly. Therefore, the temperature changes slowly. In this case, the temperature change has little effect on the voltage waveform and the lag time is relatively short. That is, the temperature change will be reflected in the voltage waveform more promptly without much delay. However, when the current increases more, the line temperature will rise faster, which will also make the lag time relatively short. Therefore, when the real-time lag time is less than or equal to the minimum value of the standard lag time range, it is also necessary to consider whether it is caused by a large increase in current, in order to accurately detect the power line loss.

[0069] See also Figure 3 As shown, it is a schematic diagram of the structure of the current analysis unit according to an embodiment of the present invention;

[0070] Specifically, when the real-time lag time is less than or equal to the minimum value of the standard lag time range, for any of the sensor nodes, the current analysis unit obtains the standard power current and the standard power current difference of the monitoring area in the historical database, the first calculation subunit monitors the real-time power current of the corresponding monitoring area collected by any of the sensor nodes in real time, obtains the difference between the real-time power current and the standard power current and records it as the real-time power current difference, and the first comparison subunit compares the standard power current difference with the real-time power current difference.

[0071] If the real-time power current difference is less than or equal to the standard power current difference, it is determined that the power transmission in the corresponding monitoring area is normal;

[0072] If the real-time power current difference is greater than the standard power current difference, the first analysis subunit determines that the power transmission in the corresponding monitoring area is abnormal.

[0073] The standard power current in this embodiment indicates the maximum current value of the transmission line for continuous and safe operation, which is affected by the type of actual line, conductor material, diameter and design specifications. For example, the long-term load current allowed by a 1 square copper core wire is 8A to 12A, while the allowable current of a 2.5 square copper core wire is 16A to 25A; the standard power current difference indicates the degree of deviation between the real-time power current and the standard power current. Generally, it is set between 3% and 9% of the standard power current. The standard power current is related to the stability of the power. The larger the standard power current difference, the greater the volatility of the current.

[0074] By comparing the standard power current difference with the real-time power current difference, it is possible to analyze whether the reason for the short real-time lag time is due to a large increase in current. If the real-time power current difference is determined to be less than or equal to the standard power current difference, it means that the current is stable during the transmission process, and the temperature change of the line is relatively stable, and there will be no sudden increase. Therefore, the temperature changes slowly. In this case, the temperature change has little effect on the voltage waveform, and the lag time is relatively short. If the real-time power supply voltage difference is determined to be greater than the standard power supply voltage difference, it means that the actual power current fluctuates greatly. This is because when the current increases more, the line temperature will rise faster, which will also make the lag time relatively short. In this case, the corresponding monitoring area is determined to have abnormal power transmission, and an early warning prompt is issued.

[0075] See also Figure 4 As shown, it is a schematic diagram of the structure of a voltage analysis unit according to an embodiment of the present invention.

[0076] Specifically, when the real-time hysteresis time is greater than the maximum value of the standard hysteresis time range, the voltage analysis unit obtains the voltage change curve of the adjacent sensing node, the second calculation subunit calculates the real-time similarity between the voltage waveform of the sensing node and the adjacent voltage waveform, and the second comparison subunit compares the standard similarity with the real-time similarity.

[0077] If the real-time similarity is less than or equal to the standard similarity, it is determined that a transmission line fault occurs in the corresponding monitoring area, and the marking subunit simulates marking the monitoring area;

[0078] If the real-time similarity is greater than the standard similarity, continue to obtain the voltage change curve of the next adjacent sensor node for analysis;

[0079] The standard similarity in this embodiment represents the similarity threshold of adjacent current pressure shapes. The set value is related to the type of transmission line, generally set between 60% and 80%, and is selected and adjusted according to the actual detection needs. The real-time similarity is calculated by using the correlation coefficient calculation method, obtaining the voltage waveforms X and Y corresponding to adjacent sensor nodes, calculating the correlation coefficient, and taking the absolute value of the correlation coefficient as the real-time similarity. For each sensor node, the change of current over time is recorded to form time series data, ensuring that the two time series have the same sampling rate and time length, and aligning the time series by interpolation or truncation.

[0080]

[0081] Where R is the correlation coefficient, is the mean of X, is the mean of Y, n is the length of the time series, and the real-time similarity ranges from [-1, 1], indicating the similarity of adjacent current waveforms, and R = 1 indicates complete similarity.

[0082] When it is determined that the real-time lag time is greater than the minimum value of the standard lag time range, the real-time similarity of adjacent voltage waveforms is calculated to analyze the similarity of the changing trends of adjacent voltage waveforms, so as to accurately detect the degree of power line loss and ensure the stability of power operation.

[0083] The analysis module further includes a line loss statistics unit, which includes a third calculation subunit and a third comparison subunit, wherein:

[0084] The third calculation subunit is used to calculate the real-time line loss rate according to the number of completed simulation marks;

[0085] The third comparison subunit is used to compare the standard line loss rate with the real-time line loss rate to determine whether to add a sensor node in the monitoring area.

[0086] Specifically, when the waveform similarity analysis of all sensor nodes is completed, the percentage of the number of completed simulation marks in the total number of monitored areas is obtained and recorded as the real-time line loss rate. The standard line loss rate is compared with the real-time line loss rate.

[0087] If the real-time line loss rate is less than the standard line loss rate, continue to analyze the next preset collection cycle;

[0088] If the real-time line loss rate is greater than or equal to the standard line loss rate, add a sensor node at the center of the monitoring area where the simulation mark is completed;

[0089] The standard line loss rate in this embodiment represents the maximum acceptable line loss rate in power transmission operations. If this value is exceeded, the power transmission efficiency is considered to be poor and measures need to be taken to improve it. Generally, the standard line loss rate is set between 5% and 10% and is selected based on the region and power transmission needs.

[0090] By counting the number of monitoring nodes with line loss problems, the proportion of monitoring areas with large line losses in the transmission lines is calculated, thereby optimizing the design and operation parameters of the transmission lines and improving the power transmission efficiency. If the real-time line loss rate is greater than or equal to the standard line loss rate, it means that the line loss rate is too high. In this way, monitoring nodes are added in the area where the line loss rate is too high to more accurately locate and analyze the line loss problem. If the real-time line loss rate is determined to be less than the standard line loss rate, the problem area is located, and a timely warning is issued to remind relevant personnel to carry out repairs and reduce line losses.

[0091] Specifically, the power analysis unit is used to calculate the real-time power loss rate between the output end and the input end of the power transmission line to be detected when the real-time hysteresis time is within the standard hysteresis time range, and determine the real-time power loss rate according to the standard power loss rate.

[0092] If the real-time power loss rate is less than or equal to the standard power loss rate, it is determined that the transmission line is transmitting normally;

[0093] If the real-time power loss rate is greater than the standard power loss rate, the current operating status of each power device monitored by the status monitoring module is obtained to determine whether the power transmission line is faulty;

[0094] The real-time power consumption rate is obtained by subtracting the real-time power consumption of the output end from the real-time power consumption of the input end and dividing the value by the power consumption of the input end.

[0095] The standard power loss rate set in this embodiment represents the allowable power loss when the power equipment and transmission lines are normal, and is composed of transmission line loss, transformer loss, distribution line loss, equipment operation loss and non-technical loss. The set value is related to the material, cross-sectional area, load condition, length and equipment characteristics of the transmission line. Generally, it is set between 3% and 10%, and is selected and adjusted according to actual transmission demand.

[0096] Specifically, the power analysis unit also includes a loss analysis unit, which is used to obtain the current operating status of each power device monitored by the power transmission monitoring module when the real-time power loss rate is greater than the standard power loss rate, and to correct the minimum value of the standard hysteresis time range when each power device is in a normal state;

[0097] If any electrical equipment is in a faulty state, conduct on-site inspection and handling.

[0098] Wherein, Tbmin'=Tbmin×[1-(Ws-Wb) / Ws], Tbmin' is the minimum value of the corrected standard hysteresis time range, Tbmin is the standard hysteresis time, Ws is the real-time power loss rate, and Wb is the standard power loss rate.

[0099] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power line loss detection system, characterized in that: include, A deployment module is used to divide the transmission line to be detected into a number of monitoring areas and to deploy corresponding sensor nodes in each of the monitoring areas; A collection module, which is connected to each of the sensor nodes, and is used to collect state parameters corresponding to each sensor node on the transmission line to be detected, wherein the state parameters include real-time current, real-time voltage and real-time temperature; A status monitoring module, which is connected to a plurality of electrical devices and is used to monitor the fault status of each of the electrical devices in real time; A power transmission monitoring module, which is connected to the input end and the output end of the power transmission line, and is used to monitor the current operating state of each power device, wherein the current operating state includes a normal state and a fault state; An analysis module, which is connected to the acquisition module, and is used to obtain the real-time temperature, real-time current and real-time voltage of each of the sensor nodes, draw temperature change curves, current change curves and voltage change curves, and obtain the time difference between the current change curve and the temperature change curve for analysis to determine whether to simulate marking the monitoring area where power transmission abnormality occurs; Wherein, the analysis module includes a voltage analysis unit, The voltage analysis unit is used to analyze the waveform similarity of the voltage fluctuation curves of adjacent sensor nodes when the real-time hysteresis time is greater than the maximum value of the standard hysteresis time range; The voltage analysis unit includes a second calculation subunit, a second comparison subunit and a marking subunit, wherein: The second calculation subunit is used to calculate the real-time similarity between the voltage waveform of the sensing node and the adjacent voltage waveform; The second comparison subunit is used to compare the standard similarity with the real-time similarity; The marking subunit is used to simulate marking the monitoring area when the real-time similarity is less than or equal to the standard similarity; The analysis module calculates the real-time line loss rate according to the number of simulation markers; A deployment adjustment module is connected to the analysis module and is used to determine whether to add a sensor node in the monitoring area after the simulation marking according to the real-time line loss rate.

2. The power line loss detection system according to claim 1, characterized in that: The analysis module also includes a drawing unit, a time difference acquisition unit, a time difference determination unit and a power analysis unit, wherein: The drawing unit is used to draw a curve of the real-time temperature change over time of any of the sensor nodes in a preset acquisition cycle to obtain a temperature change curve, draw a curve of the real-time current change over time to obtain a current change curve, and draw a curve of the real-time voltage change over time to obtain a voltage change curve; The time difference acquisition unit is used to acquire the real-time hysteresis duration according to the temperature change curve and the current change curve; The time difference determination unit is used to determine the real-time lag duration according to the standard lag duration range; The power analysis unit is used to obtain the real-time power loss rate for analysis when the real-time hysteresis time is within the standard hysteresis time range, so as to determine whether power transmission abnormality occurs in the monitoring area corresponding to the sensor node.

3. The power line loss detection system according to claim 2, characterized in that: The analysis module further includes a comparison unit and a current analysis unit, wherein: The comparison unit is used to compare the real-time lag time with the standard lag time range; The current analysis unit is used to obtain the real-time power current difference for analysis when the real-time hysteresis time is less than or equal to the minimum value of the standard hysteresis time range.

4. The power line loss detection system according to claim 3, characterized in that: The current analysis unit includes a history database, a first calculation subunit, a first comparison subunit and a first analysis subunit, wherein: The historical database stores the standard power current and the standard power current difference of the power transmission line corresponding to the monitoring area; The first calculation subunit is used to calculate the real-time power current difference of the corresponding monitoring area collected by the sensor node; The first comparison subunit is used to compare the standard power current difference with the real-time power current difference; The first analysis subunit is used to determine that power transmission in the corresponding monitoring area is abnormal when the real-time power current difference is greater than the standard power current difference.

5. The power line loss detection system according to claim 4, characterized in that: The analysis module further includes a line loss statistics unit, which includes a third calculation subunit and a third comparison subunit, wherein: The third calculation subunit is used to calculate the real-time line loss rate according to the number of completed simulation marks; The third comparison subunit is used to compare the standard line loss rate with the real-time line loss rate to determine whether to add a sensor node in the monitoring area.

6. The power line loss detection system according to claim 2, characterized in that: The power analysis unit includes an acquisition subunit and a power determination subunit, wherein: The acquisition subunit is used to calculate the real-time power loss rate according to the real-time power between the output end and the input end of the power transmission line to be detected; The power determination subunit is used to determine the real-time power loss rate according to the standard power loss rate, and determine whether the transmission line transmission is normal according to the determination result.

7. The power line loss detection system according to claim 6, characterized in that: The power analysis unit also includes a loss analysis unit, which is used to obtain the current operating status of each power device monitored by the power transmission monitoring module when the real-time power loss rate is greater than the standard power loss rate, and to correct the minimum value of the standard lag time range when each power device is in a normal state.

8. The power line loss detection system according to claim 7, characterized in that: The formula for correcting the minimum value of the standard hysteresis time range is Tbmin'=Tbmin×[1-(Ws-Wb) / Ws], where: Tbmin' is the minimum value of the corrected standard hysteresis time range, Tbmin is the standard hysteresis time, Ws is the real-time power loss rate, and Wb is the standard power loss rate.

9. The power line loss detection system according to claim 2, characterized in that: The time difference acquisition unit acquires the peak value of the temperature change curve as the initial timing time, and acquires the peak value of the current change curve as the end timing time, calculates the time difference between the initial timing time and the end timing time, and obtains the real-time lag time.

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