Mining frequency converter monitoring system and method based on Internet

Abstract

The invention relates to the field of mining frequency converter monitoring of the Internet, in particular to a mining frequency converter monitoring system and method based on the Internet, and the system comprises a port collection module, an energy consumption analysis module, a fault display module, an equipment central control module, and a harmonic signal analysis module. The harmonic signal analysis module analyzes a harmonic effective value, a harmonic content, a total harmonic distortion rate and a telephone harmonic factor according to the collected data, and the energy consumption analysis module analyzes a total abnormal power consumption time period, a total abnormal load time period and a comprehensive aging evaluation index of the mining frequency converter. The mining frequency converter harmonic wave monitoring system aims at reducing damage of harmonic waves of the mining frequency converter to equipment and a power grid and improving the quality of the power grid and the stability of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of Internet-based mining frequency converter monitoring, and in particular to an Internet-based mining frequency converter monitoring system and method. Background Art

[0002] In the field of mining production, mining inverters play a vital role. Their performance and operating status directly affect the efficiency and safety of the entire production system. With the continuous improvement of mine mechanization and automation, the demand for monitoring mining inverters is becoming increasingly urgent. Mining inverters will generate harmonic problems during operation. Harmonics will affect the service life and performance of the inverter itself, and will also cause serious interference to the quality of the mine power grid, resulting in increased power grid losses and decreased power factor. Existing monitoring systems often lack comprehensive analysis and effective management of harmonics, and cannot timely and accurately assess the degree of harmonic damage, nor can they take targeted measures to suppress them.

[0003] As for the energy consumption management of mining inverters, it is difficult for mining enterprises to accurately grasp the energy consumption of inverters in different time periods, and they cannot effectively identify equipment and time periods with abnormal energy consumption, which is not conducive to the implementation of energy-saving measures and the optimization of energy utilization efficiency. In terms of equipment aging assessment and fault diagnosis, there is a lack of comprehensive and intelligent means. In order to improve the efficiency of mine production, a comprehensive and intelligent Internet-based mining inverter monitoring system and method is needed, with functions such as accurate harmonic analysis, fine energy consumption management, equipment aging assessment, and intelligent fault diagnosis and classification processing to meet the development needs of modern mining production. Summary of the invention

[0004] In order to solve the technical problems raised by the above background technology, the present invention provides an Internet-based mining inverter monitoring system and method.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A first aspect of the present invention provides an Internet-based mining inverter monitoring system, comprising a port acquisition module, a harmonic signal analysis module, an energy consumption analysis module, a fault display module, an equipment central control module and a data center.

[0007] The port collection module collects data at each monitoring time point in real time according to the ports connected to various types of sensors. The specific process is as follows:

[0008] The port acquisition module is provided with an acquisition unit and a data classification storage unit; the input port of the acquisition unit is connected to the output port of each type of sensor, and the acquisition unit initializes the connection port of each type of sensor, and the initialization includes setting the communication parameters of the port, and detecting the connection status of the port and each type of sensor, setting the detection instruction to be sent to the port of each type of sensor, obtaining each transmission time, extracting the standard receiving time in the database, recording the corresponding port that is longer than the standard receiving time as an abnormal connection end, and sending the corresponding sensor to the mobile terminal of the maintenance personnel for repair;

[0009] The collection time interval is set to 3 seconds. The output voltage signal and output current signal of the inverter are collected in real time through current sensors and voltage sensors. The collected output voltage signal and output current signal containing harmonics are converted into A / D signals to obtain voltage discrete signal sequences and current discrete signal sequences. The output end of the port collection module is connected to the input end of the harmonic signal analysis module, and the voltage discrete signal sequence and current discrete signal sequence are sent to the harmonic signal analysis module; the output voltage value and output current value are collected in real time through current sensors and voltage sensors and sent to the energy consumption analysis module.

[0010] The harmonic signal analysis module analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor based on the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analyzed results will be sent to the equipment central control module for processing. The specific process is as follows:

[0011] The input end of the harmonic signal analysis is connected to the output end of the database, and the output end of the harmonic signal analysis is connected to the input end of the central control module of the equipment. The harmonic signal analysis module is provided with an analysis unit and a model substitution processing unit. The analysis unit performs Fourier transform operation on the voltage discrete signal sequence and the current discrete signal sequence to obtain the voltage complex amplitude sequence and the current complex amplitude sequence, and matches the two to obtain the power complex amplitude sequence in the frequency domain. , k is the frequency, according to the formula Get the amplitude An of the nth harmonic, where n represents the total number of harmonics currently collected, and then substitute the amplitude An into the formula Get the real-time harmonic effective value GR;

[0012] Set the current fundamental effective value to TU, and substitute the fundamental effective value and real-time harmonic effective value into the formula Get the real-time harmonic content GE;

[0013] Set a preset harmonic monitoring period, divide the preset harmonic monitoring period into several preset harmonic monitoring sub-periods, one harmonic monitoring sub-period corresponds to one real-time harmonic effective value, obtain the real-time harmonic effective values ​​corresponding to each harmonic monitoring sub-period, calculate the square sum of each real-time harmonic effective value to obtain the harmonic effective average sum value FT, substitute the harmonic effective average sum value and the fundamental wave effective value into the formula Get the current total harmonic distortion rate GP;

[0014] Get the duration of the call, the number of calls made, and the call signal value in the current area, set them as TI, TL, and TG respectively, normalize them and substitute them into the formula for calculation Obtaining the telephone harmonic factor GC, wherein G1, G2 and G3 are weight factor coefficients of the duration of the telephone call, the number of telephone calls and the telephone call signal value;

[0015] The analysis unit sends the real-time harmonic effective value, real-time harmonic content, total harmonic distortion rate and telephone harmonic factor obtained after analysis to the model substitution processing unit. The model substitution processing unit calculates through the built-in harmonic integrated quantization model and substitutes each data into the formula The harmonic integrated quantization value GTQ of the current mining inverter is obtained, where C1, C2, C3 and C4 are preset proportional coefficients. To preset the harmonic content, is the preset harmonic effective value, i represents the harmonic monitoring time period, and n represents the total number of harmonic monitoring time periods;

[0016] Extract the preset harmonic integrated quantization threshold value from the database, compare the harmonic integrated quantization value of the mining inverter with the preset harmonic integrated quantization threshold value, and if the harmonic integrated quantization value is greater than the preset harmonic integrated quantization threshold value, generate a harmonic signal and send it to the central control module of the equipment.

[0017] The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter. The specific process is as follows:

[0018] The input end of the energy consumption analysis module is connected to the output end of the database, and the output end of the energy consumption analysis module is connected to the input end of the fault display module. The energy consumption analysis module is provided with a load identification unit, an equipment aging analysis unit and an energy consumption hazard model unit. The load identification unit identifies the no-load state and the load state of each mining frequency converter, obtains the output current value and the output voltage value of the frequency converter in the no-load state, obtains the output power according to the output current value and the output voltage value, sets the set period to twenty-four hours, extracts the standard no-load power consumption value and the standard load power consumption value in the database, collects each abnormal no-load power consumption period greater than the standard no-load power consumption value within the set period, adds each abnormal no-load power consumption period to obtain a total abnormal power consumption period QL, collects each abnormal load power consumption period greater than the standard load power consumption value within the set period, and adds the abnormal load power consumption period to obtain a total abnormal load period QY;

[0019] The equipment aging analysis unit obtains the usage time point of each mining inverter, and then cuts off the time point of the current mining inverter, marking it as the cut-off time point, and makes a difference between the usage time point and the cut-off time point of each mining inverter to obtain the running time period RQ of each mining inverter, and then obtains the surface image of each mining inverter through a high-definition camera, identifies the surface image to obtain each dirt area, dirt quantity, bump area and bump quantity, matches each dirt area and dirt quantity to obtain the total dirt area BE, matches the bump area and bump quantity to obtain the total bump area BT, and normalizes the obtained total dirt area, total bump area and running time period and substitutes them into the formula The comprehensive aging evaluation index QK is obtained, where Q1, Q2 and Q3 are the weight coefficients corresponding to the total dirt area, the total collision area and the operating time period;

[0020] The energy consumption hazard model unit uses the formula to calculate the total abnormal power consumption period, the total abnormal load period and the comprehensive aging assessment index. The equipment energy consumption danger value QS of each mine inverter is obtained, where L1, L2 and L3 are preset proportional coefficients, m represents the number of each mine inverter, g represents the total number of each mine inverter, and the preset equipment energy consumption danger threshold in the database is extracted. The equipment energy consumption danger value of each mine inverter is compared with the preset equipment energy consumption danger threshold. If the equipment energy consumption danger value of a mine inverter is greater than the preset equipment energy consumption danger threshold, the mine inverter is marked as equipment to be repaired, and an aging signal is generated and sent to the fault display module.

[0021] The fault display module obtains the fault area of ​​the current mining inverter according to the signal intelligence, and displays the fault area and sends it to the central control module of the equipment. The specific process is as follows:

[0022] The output end of the fault display module is connected to the input end of the equipment central control module. The fault display module is composed of an equipment positioning unit and a thermal imaging recognition unit. The equipment positioning unit obtains the position information of the corresponding mining frequency converter through a positioning sensor. The equipment positioning unit takes the corresponding mining frequency converter as the origin, obtains the location of the nearby thermal imaging equipment, and sends the location of the thermal imaging equipment to the thermal imaging recognition unit.

[0023] The thermal imaging recognition unit generates an opening instruction and sends it to the corresponding thermal imaging device. The thermal imaging device obtains the thermal imaging image of the corresponding mining inverter, identifies the high-temperature area of ​​the thermal imaging image and marks it, and sends the marked position to the central control module of the equipment for display.

[0024] The central control module of the equipment divides the fault results of the mining inverter into different levels for processing. The specific process is as follows:

[0025] The central control module of the equipment sets the harmonic level, which is divided into slight harmonic fault level, moderate harmonic fault level and severe harmonic fault level, sets the slight harmonic fault threshold, and sets the monitoring interface. The slight harmonic fault level is specifically when the total harmonic distortion is within the specified range of 5%-10%, and the content of each harmonic is within the set slight fault threshold. In this case, a slight warning signal is generated and sent to the monitoring interface for display as a "slight harmonic fault" text description; the moderate harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by 10%-20%, and the content exceeds the slight fault threshold by 25%, in which case a moderate warning signal is generated and sent to the monitoring interface for display as a "moderate harmonic fault" text description, limiting the output power and running time of the mining inverter; the severe harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by more than 20%, and the content exceeds the slight fault threshold by 40%, in which case a severe warning signal is generated and sent to the monitoring interface for display as a "severe harmonic fault" text description, stopping the operation of the mining inverter;

[0026] After receiving the identification position, a signal corresponding to the identification position is generated and sent to nearby maintenance personnel for maintenance.

[0027] Please refer to Figure 2 As shown, the second aspect of the present invention provides an Internet-based mining inverter monitoring method, and the specific steps are as follows:

[0028] K1: The port collection module collects data at each monitoring time point in real time according to the ports connected to various types of sensors;

[0029] K2: Harmonic signal analysis analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor based on the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analysis results are sent to the central control of the equipment;

[0030] K3: The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter;

[0031] K4: Fault display intelligently obtains the fault area of ​​the current mining inverter according to the signal and displays the fault area;

[0032] K5: The equipment central control module classifies the fault results of the mining inverter into different levels for processing.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: the harmonic signal analysis module can accurately calculate parameters such as harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor, and timely discover the harmonic exceeding the standard by comparing with the preset threshold value, and calculate the harmonic integrated quantization value, providing an accurate basis for the equipment central control module. This allows mining enterprises to take targeted measures, such as adjusting the inverter operating parameters or enabling harmonic suppression equipment, to reduce the harm of harmonics to equipment and power grids, and improve the quality of the power grid and equipment stability. The energy consumption analysis module can accurately identify equipment and time periods with abnormal energy consumption by analyzing the total abnormal power consumption period, the total abnormal load period and the comprehensive aging evaluation index. By calculating the dangerous value of equipment energy consumption and marking the equipment to be repaired, it helps mining enterprises to timely discover and solve equipment energy consumption problems, achieve energy saving and consumption reduction, provide data support for equipment maintenance and updating, optimize equipment operation strategies, and improve energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The following drawings are not intentionally scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0035] Figure 1 It is a principle block diagram of the present invention.

[0036] Figure 2 It is a diagram of the method steps of the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0038] Please refer to Figure 1As shown, the first aspect of the present invention provides an Internet-based mining inverter monitoring system, including a port acquisition module, a harmonic signal analysis module, an energy consumption analysis module, a fault display module, an equipment central control module and a data center.

[0039] The port collection module collects data at each monitoring time point in real time according to the ports connected to various types of sensors. The specific process is as follows:

[0040] The port acquisition module is provided with an acquisition unit and a data classification storage unit; the input port of the acquisition unit is connected to the output port of each type of sensor, and the acquisition unit initializes the connection port of each type of sensor, and the initialization includes setting the communication parameters of the port, and detecting the connection status of the port and each type of sensor, setting the detection instruction to be sent to the port of each type of sensor, obtaining each transmission time, extracting the standard receiving time in the database, recording the corresponding port that is longer than the standard receiving time as an abnormal connection end, and sending the corresponding sensor to the mobile terminal of the maintenance personnel for repair;

[0041] The collection time interval is set to 3 seconds. The output voltage signal and output current signal of the inverter are collected in real time through current sensors and voltage sensors. The collected output voltage signal and output current signal containing harmonics are converted into A / D signals to obtain voltage discrete signal sequences and current discrete signal sequences. The output end of the port collection module is connected to the input end of the harmonic signal analysis module, and the voltage discrete signal sequence and current discrete signal sequence are sent to the harmonic signal analysis module; the output voltage value and output current value are collected in real time through current sensors and voltage sensors and sent to the energy consumption analysis module.

[0042] The harmonic signal analysis module analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor based on the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analyzed results will be sent to the equipment central control module for processing. The specific process is as follows:

[0043] The input end of the harmonic signal analysis is connected to the output end of the database, and the output end of the harmonic signal analysis is connected to the input end of the central control module of the equipment. The harmonic signal analysis module is provided with an analysis unit and a model substitution processing unit. The analysis unit performs Fourier transform operation on the voltage discrete signal sequence and the current discrete signal sequence to obtain the voltage complex amplitude sequence and the current complex amplitude sequence, and matches the two to obtain the power complex amplitude sequence in the frequency domain. , k is the frequency, according to the formula Get the amplitude An of the nth harmonic, where n represents the total number of harmonics currently collected, and then substitute the amplitude An into the formula Get the real-time harmonic effective value GR;

[0044] Set the current fundamental effective value to TU, and substitute the fundamental effective value and real-time harmonic effective value into the formula Get the real-time harmonic content GE;

[0045] Set a preset harmonic monitoring period, divide the preset harmonic monitoring period into several preset harmonic monitoring sub-periods, one harmonic monitoring sub-period corresponds to one real-time harmonic effective value, obtain the real-time harmonic effective values ​​corresponding to each harmonic monitoring sub-period, calculate the square sum of each real-time harmonic effective value to obtain the harmonic effective average sum value FT, substitute the harmonic effective average sum value and the fundamental wave effective value into the formula Get the current total harmonic distortion rate GP;

[0046] Get the duration of the call, the number of calls made, and the call signal value in the current area, set them as TI, TL, and TG respectively, normalize them and substitute them into the formula for calculation Obtaining the telephone harmonic factor GC, wherein G1, G2 and G3 are weight factor coefficients of the duration of the telephone call, the number of telephone calls and the telephone call signal value;

[0047] The analysis unit sends the real-time harmonic effective value, real-time harmonic content, total harmonic distortion rate and telephone harmonic factor obtained after analysis to the model substitution processing unit. The model substitution processing unit calculates through the built-in harmonic integrated quantization model and substitutes each data into the formula The harmonic integrated quantization value GTQ of the current mining inverter is obtained, where C1, C2, C3 and C4 are preset proportional coefficients. To preset the harmonic content, is the preset harmonic effective value, i represents the harmonic monitoring time period, and n represents the total number of harmonic monitoring time periods;

[0048] Extract the preset harmonic integrated quantization threshold value from the database, compare the harmonic integrated quantization value of the mining inverter with the preset harmonic integrated quantization threshold value, and if the harmonic integrated quantization value is greater than the preset harmonic integrated quantization threshold value, generate a harmonic signal and send it to the central control module of the equipment.

[0049] The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter. The specific process is as follows:

[0050] The input end of the energy consumption analysis module is connected to the output end of the database, and the output end of the energy consumption analysis module is connected to the input end of the fault display module. The energy consumption analysis module is provided with a load identification unit, an equipment aging analysis unit and an energy consumption hazard model unit. The load identification unit identifies the no-load state and the load state of each mining frequency converter, obtains the output current value and the output voltage value of the frequency converter in the no-load state, obtains the output power according to the output current value and the output voltage value, sets the set period to twenty-four hours, extracts the standard no-load power consumption value and the standard load power consumption value in the database, collects each abnormal no-load power consumption period greater than the standard no-load power consumption value within the set period, adds each abnormal no-load power consumption period to obtain a total abnormal power consumption period QL, collects each abnormal load power consumption period greater than the standard load power consumption value within the set period, and adds the abnormal load power consumption period to obtain a total abnormal load period QY;

[0051] The equipment aging analysis unit obtains the usage time point of each mining inverter, and then cuts off the time point of the current mining inverter, marking it as the cut-off time point, and makes a difference between the usage time point and the cut-off time point of each mining inverter to obtain the running time period RQ of each mining inverter, and then obtains the surface image of each mining inverter through a high-definition camera, identifies the surface image to obtain each dirt area, dirt quantity, bump area and bump quantity, matches each dirt area and dirt quantity to obtain the total dirt area BE, matches the bump area and bump quantity to obtain the total bump area BT, and normalizes the obtained total dirt area, total bump area and running time period and substitutes them into the formula The comprehensive aging evaluation index QK is obtained, where Q1, Q2 and Q3 are the weight coefficients corresponding to the total dirt area, the total collision area and the operating time period;

[0052] The energy consumption hazard model unit uses the formula to calculate the total abnormal power consumption period, the total abnormal load period and the comprehensive aging assessment index. The equipment energy consumption danger value QS of each mine inverter is obtained, where L1, L2 and L3 are preset proportional coefficients, m represents the number of each mine inverter, g represents the total number of each mine inverter, and the preset equipment energy consumption danger threshold in the database is extracted. The equipment energy consumption danger value of each mine inverter is compared with the preset equipment energy consumption danger threshold. If the equipment energy consumption danger value of a mine inverter is greater than the preset equipment energy consumption danger threshold, the mine inverter is marked as equipment to be repaired, and an aging signal is generated and sent to the fault display module.

[0053] The fault display module obtains the fault area of ​​the current mining inverter according to the signal intelligence, and displays the fault area and sends it to the central control module of the equipment. The specific process is as follows:

[0054] The output end of the fault display module is connected to the input end of the equipment central control module. The fault display module is composed of an equipment positioning unit and a thermal imaging recognition unit. The equipment positioning unit obtains the position information of the corresponding mining frequency converter through a positioning sensor. The equipment positioning unit takes the corresponding mining frequency converter as the origin, obtains the location of the nearby thermal imaging equipment, and sends the location of the thermal imaging equipment to the thermal imaging recognition unit.

[0055] The thermal imaging recognition unit generates an opening instruction and sends it to the corresponding thermal imaging device. The thermal imaging device obtains the thermal imaging image of the corresponding mining inverter, identifies the high-temperature area of ​​the thermal imaging image and marks it, and sends the marked position to the central control module of the equipment for display.

[0056] The central control module of the equipment divides the fault results of the mining inverter into different levels for processing. The specific process is as follows:

[0057] The central control module of the equipment sets the harmonic level, which is divided into slight harmonic fault level, moderate harmonic fault level and severe harmonic fault level, sets the slight harmonic fault threshold, and sets the monitoring interface. The slight harmonic fault level is specifically when the total harmonic distortion is within the specified range of 5%-10%, and the content of each harmonic is within the set slight fault threshold. In this case, a slight warning signal is generated and sent to the monitoring interface for display as a "slight harmonic fault" text description; the moderate harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by 10%-20%, and the content exceeds the slight fault threshold by 25%, in which case a moderate warning signal is generated and sent to the monitoring interface for display as a "moderate harmonic fault" text description, limiting the output power and running time of the mining inverter; the severe harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by more than 20%, and the content exceeds the slight fault threshold by 40%, in which case a severe warning signal is generated and sent to the monitoring interface for display as a "severe harmonic fault" text description, stopping the operation of the mining inverter;

[0058] After receiving the identification position, a signal corresponding to the identification position is generated and sent to nearby maintenance personnel for maintenance.

[0059] Please refer to Figure 2 As shown, the second aspect of the present invention provides an Internet-based mining inverter monitoring method, and the specific steps are as follows:

[0060] K1: The port collection module collects data at each monitoring time point in real time according to the ports connected to various types of sensors;

[0061] K2: Harmonic signal analysis analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor based on the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analysis results are sent to the central control of the equipment;

[0062] K3: The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter;

[0063] K4: Fault display intelligently obtains the fault area of ​​the current mining inverter according to the signal and displays the fault area;

[0064] K5: The equipment central control module classifies the fault results of the mining inverter into different levels for processing.

[0065] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. An Internet-based mining inverter monitoring system, comprising a port acquisition module, an energy consumption analysis module, a fault display module, an equipment central control module and a data center, characterized in that: Also includes harmonic signal analysis module; The harmonic signal analysis module analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor according to the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analyzed results are sent to the equipment central control module for processing. The harmonic signal analysis module is provided with an analysis unit and a model substitution processing unit. The analysis unit performs Fourier transform operation on the voltage discrete signal sequence and the current discrete signal sequence to obtain the voltage complex amplitude sequence and the current complex amplitude sequence, and matches the two to obtain the power complex amplitude sequence in the frequency domain. , k is expressed as frequency, according to the formula Get the amplitude An of the nth harmonic, where n represents the total number of harmonics currently collected. Substitute the amplitude An into the formula Get the real-time harmonic effective value GR; Set the current fundamental effective value to TU, and substitute the fundamental effective value and real-time harmonic effective value into the formula Get the real-time harmonic content GE; Set a preset harmonic monitoring period, divide the preset harmonic monitoring period into several preset harmonic monitoring sub-periods, obtain the real-time harmonic effective values ​​corresponding to each harmonic monitoring sub-period, calculate the square sum of each real-time harmonic effective value to obtain the harmonic effective average sum value FT, substitute the harmonic effective average sum value and the fundamental wave effective value into the formula Get the current total harmonic distortion rate GP; Get the duration of the call, the number of calls made, and the call signal value in the current area, set them as TI, TL, and TG respectively, normalize them and substitute them into the formula for calculation The telephone harmonic factor GC is obtained, wherein G1, G2 and G3 are weight factor coefficients of the duration of the call, the number of phone calls and the phone call signal value; the analysis unit sends the real-time harmonic effective value, real-time harmonic content, total harmonic distortion rate and telephone harmonic factor obtained after analysis to the model substitution processing unit.

2. The Internet-based mining inverter monitoring system according to claim 1 is characterized in that: The model is substituted into the processing unit for calculation through the built-in harmonic integrated quantization model, and each data is substituted into the formula The harmonic integrated quantization value GTQ of the current mining frequency converter is obtained, wherein C1, C2, C3 and C4 are preset proportional coefficients; Extract the preset harmonic integrated quantization threshold value from the database, compare the harmonic integrated quantization value of the mining inverter with the preset harmonic integrated quantization threshold value, and if the harmonic integrated quantization value is greater than the preset harmonic integrated quantization threshold value, generate a harmonic signal and send it to the central control module of the equipment.

3. The Internet-based mining inverter monitoring system according to claim 1 is characterized in that: The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter. The specific process is as follows: The energy consumption analysis module is provided with a load identification unit, an equipment aging analysis unit and an energy consumption hazard model unit. The unit load identification unit identifies the no-load state and load state of each mining inverter, obtains the output current value and output voltage value of the inverter in the no-load state, obtains the output power according to the output current value and the output voltage value, sets the set time period to twenty-four hours, extracts the standard no-load power consumption value and the standard load power consumption value in the database, collects the various abnormal no-load power consumption time periods that are greater than the standard no-load power consumption value within the set time period, adds the various abnormal no-load power consumption time periods to obtain the total abnormal power consumption time period QL, collects the various abnormal load power consumption time periods that are greater than the standard load power consumption value within the set time period, adds the abnormal load power consumption time periods to obtain the total abnormal load time period QY, and sends the total abnormal power consumption time period and the total abnormal load time period to the equipment energy consumption hazard model unit.

4. The Internet-based mining inverter monitoring system according to claim 3 is characterized in that: The equipment aging analysis unit obtains the usage time point of each mining inverter, and then cuts off the time point of the current mining inverter, marking it as the cut-off time point, and makes a difference between the usage time point of each mining inverter and the cut-off time point to obtain the running time period RQ of each mining inverter, and then obtains the surface image of each mining inverter through a high-definition camera, identifies the surface image to obtain each dirt area, dirt quantity, bump area and bump quantity, matches each dirt area and dirt quantity to obtain the total dirt area BE, matches the bump area and bump quantity to obtain the total bump area BT, and normalizes the obtained total dirt area, total bump area and running time period and substitutes them into the formula The comprehensive aging assessment index QK is obtained, where Q1, Q2 and Q3 are weight coefficients corresponding to the total dirt area, the total collision area and the running time period, and the comprehensive aging assessment index is sent to the equipment energy consumption hazard model unit.

5. The Internet-based mining inverter monitoring system according to claim 3 is characterized in that: The equipment energy consumption hazard model unit uses a formula to calculate the total abnormal power consumption period, the total abnormal load period and the comprehensive aging evaluation index. The equipment energy consumption danger value QS of each mine inverter is obtained, where L1, L2 and L3 are preset proportional coefficients, and the preset equipment energy consumption danger threshold in the database is extracted. The equipment energy consumption danger value of each mine inverter is compared with the preset equipment energy consumption danger threshold. If the equipment energy consumption danger value of a mine inverter is greater than the preset equipment energy consumption danger threshold, the mine inverter is marked as equipment to be repaired, and an aging signal is generated and sent to the fault display module.

6. The Internet-based mining inverter monitoring system according to claim 1 is characterized in that: The fault display module obtains the fault area of ​​the current mining inverter according to the signal intelligence, and displays the fault area and sends it to the central control module of the equipment. The specific process is as follows: The output end of the fault display module is connected to the input end of the equipment central control module. The fault display module is composed of an equipment positioning unit and a thermal imaging recognition unit. The equipment positioning unit obtains the position information of the corresponding mining inverter through a positioning sensor. The equipment positioning unit takes the corresponding mining inverter as the origin, obtains the positioning of the thermal imaging equipment nearby, and sends the thermal imaging equipment positioning to the thermal imaging recognition unit.

7. The Internet-based mining inverter monitoring system according to claim 6 is characterized in that: The thermal imaging recognition unit generates an opening instruction and sends it to the corresponding thermal imaging device. The thermal imaging device obtains the thermal imaging image of the corresponding mining inverter, identifies the high-temperature area of ​​the thermal imaging image and marks it, and sends the marked position to the central control module of the equipment for display.

8. The Internet-based mining inverter monitoring system according to claim 1 is characterized in that: The central control module of the equipment divides the fault results of the mining inverter into different levels for processing. The specific process is as follows: The central control module of the equipment sets the harmonic level, which is divided into slight harmonic fault level, moderate harmonic fault level and severe harmonic fault level, sets the slight harmonic fault threshold, and sets the monitoring interface. The slight harmonic fault level is specifically when the total harmonic distortion is within the specified range of 5%-10%, and the content of each harmonic is within the set slight fault threshold. In this case, a slight warning signal is generated and sent to the monitoring interface for display as a "slight harmonic fault" text description; the moderate harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by 10%-20%, and the content exceeds the slight fault threshold by 25%, in which case a moderate warning signal is generated and sent to the monitoring interface for display as a "moderate harmonic fault" text description, limiting the output power and running time of the mining inverter; the severe harmonic fault level is specifically when the total harmonic distortion exceeds the specified range by more than 20%, and the content exceeds the slight fault threshold by 40%, in which case a severe warning signal is generated and sent to the monitoring interface for display as a "severe harmonic fault" text description, stopping the operation of the mining inverter; After receiving the identification position, a signal corresponding to the identification position is generated and sent to nearby maintenance personnel for maintenance.

9. The Internet-based mining inverter monitoring system according to claim 1, characterized in that: The port collection module collects data at each monitoring time point in real time according to the ports connected to various types of sensors. The specific process is as follows: The port acquisition module is provided with an acquisition unit and a data classification storage unit; the input port of the acquisition unit is connected to the output port of each type of sensor, and the acquisition unit initializes the connection port of each type of sensor, and the initialization includes setting the communication parameters of the port, and detecting the connection status of the port and each type of sensor, setting the detection instruction to be sent to the port of each type of sensor, obtaining each transmission time, extracting the standard receiving time in the database, recording the corresponding port that is longer than the standard receiving time as an abnormal connection end, and sending the corresponding sensor to the mobile terminal of the maintenance personnel for repair; The collection time interval is set to 3 seconds. The output voltage signal and output current signal of the inverter are collected in real time through current sensors and voltage sensors. The collected output voltage signal and output current signal containing harmonics are converted into A / D signals to obtain voltage discrete signal sequences and current discrete signal sequences. The voltage discrete signal sequences and current discrete signal sequences are sent to the harmonic signal analysis module. The output voltage value and output current value are collected in real time through current sensors and voltage sensors and sent to the energy consumption analysis module.

10. A mining inverter monitoring method based on the Internet, characterized in that: An Internet-based mining inverter monitoring system applied to any one of claims 1 to 9, wherein the specific steps are as follows: K1: Port collection collects data at each monitoring time point in real time based on the ports connected to various types of sensors; K2: Harmonic signal analysis analyzes the harmonic effective value, harmonic content, total harmonic distortion rate and telephone harmonic factor based on the collected data, and compares the real-time analysis results with the preset threshold. If it is greater than the preset threshold, the analysis results are sent to the central control of the equipment; K3: The energy consumption analysis module analyzes the total abnormal power consumption period, total abnormal load period and comprehensive aging evaluation index of the mining inverter; K4: Fault display intelligently obtains the fault area of ​​the current mining inverter according to the signal and displays the fault area; K5: The equipment central control module classifies the fault results of the mining inverter into different levels for processing.

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