Aluminum electrolysis online insulation and zero drift monitoring system and method

Abstract

The invention provides an aluminum electrolysis online insulation and zero drift monitoring system and method, and belongs to the technical field of aluminum electrolysis. Comprising a hardware acquisition system, a big data analysis system and a network voice alarm system. A production workshop is divided into a rectification workshop and an electrolysis workshop, the electrolysis workshop is divided into a first workshop and a second workshop which are spaced from each other, each of the first workshop and the second workshop comprises a plurality of work areas which are arranged at intervals, and every two adjacent work areas are connected through a vestibule. All the vestibules are connected through under-groove buses, and the first workshop and the second workshop are connected through under-groove buses. The hardware acquisition system is used for detecting the total voltage of an electrolytic workshop, the grounding voltage of the electrolytic workshop, the voltage of each vestibule bus and the grounding voltage of the first station and the center of each work area; and the big data analysis system is used for storing and analyzing the data acquired by the hardware acquisition system, deducing a zero drift position slot number and calculating loss voltage values of the first workshop, the second workshop and each vestibule.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum electrolysis, and relates to an aluminum electrolysis online insulation and zero drift monitoring system and method. Background Art

[0002] At present, the statistical data of the cell voltage comes from the daily cumulative voltage of the work area in the cell control machine system. However, since there is a certain sampling error in the data collected by each cell control machine, the cumulative error for a zone is relatively large, which is not conducive to the production manager's comprehensive grasp of the voltage change trend in each zone, and is also not conducive to the assessment of the completion of the work area tasks. In addition, once the sampling data deviation of some cell control machines is too large and cannot be discovered in time, it may cause the cell control machine to fail and mislead the judgment of the electrolytic producer, affecting the actual control effect of the electrolytic cell.

[0003] The so-called "zero drift" is mainly caused by the short circuit of the electrolytic cell to the ground. Therefore, it is common in the aluminum electrolysis industry. After the aluminum electrolysis production is put into production, due to the aging of the electrolytic cell insulation or the metal left over during construction or the metal tools used to connect the equipment to the ground, the electrical corrosion of the infrastructure increases, and the local voltage of the electrolytic cell to the ground increases. Sparks in the electrolytic cell often occur during production, posing a great threat to the electrolytic production equipment and personal safety. At present, in the normal production process, there are mainly two situations of zero drift that affect and harm the production. Summary of the invention

[0004] The present invention provides an aluminum electrolysis online insulation and zero drift monitoring system, including a hardware acquisition system, a big data analysis system, and a network voice alarm system;

[0005] It is assumed that the production workshop is divided into a rectifier workshop and an electrolysis workshop, and the electrolysis workshop is divided into a first workshop and a second workshop spaced apart from each other, wherein the first workshop and the second workshop each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the first workshop and the second workshop are connected by under-trough busbars;

[0006] The hardware acquisition system is used to detect the total voltage of the electrolysis workshop, the grounding voltage of the electrolysis workshop, the voltage of each corridor bus, and the first and central grounding voltage of each work area;

[0007] The big data analysis system is used to store and analyze the data collected by the hardware acquisition system, infer the zero drift position slot number, and calculate the loss voltage values ​​of workshop one, workshop two and each corridor.

[0008] Furthermore, the hardware acquisition system includes a voltage acquisition terminal, a work area grounding acquisition terminal, and a corridor bus voltage acquisition terminal;

[0009] The voltage acquisition terminal is installed in the rectification workshop and is used to separately collect the total voltage and grounding voltage of Workshop 1 and Workshop 2 and transmit them to the big data analysis system;

[0010] There are multiple groups of the work area grounding acquisition terminals, which are set in one-to-one correspondence with multiple work areas. A single group of work area grounding acquisition terminals is set in a single work area, and two are installed in the first cell and the central cell of a single work area, which are used to separately collect the grounding voltages of the first cell and the central cell of a single work area and send them to the big data analysis system;

[0011] There are multiple groups of the aisle bus voltage acquisition terminals, which are set in one-to-one correspondence with multiple aisles. A single group of aisle bus voltage acquisition terminals is set in a single aisle, and two are respectively installed on different cross-sections of a single aisle. The two aisle bus voltage acquisition terminals respectively collect the voltages at two different cross-sections of the aisle to obtain the pressure difference of a single aisle and send it to the big data analysis system.

[0012] Furthermore, the hardware acquisition system further includes on-site display devices. There are multiple on-site display devices, which are set in one-to-one correspondence with each work area respectively. The zero-drift position cell numbers, the pressure differences between each aisle, the first grounding voltage values and the central grounding voltage values of each work area obtained through the analysis of the big data analysis system are sent to each on-site display device. Each on-site display device displays the zero-drift cell number, the grounding point voltage of the work area where it is located and / or the aisle voltages through an LCD screen.

[0013] Furthermore, the big data analysis system includes a data processing module and an insulation and zero-drift analysis module;

[0014] The data processing module is connected to the hardware acquisition system through a fiber optic Ethernet to receive, preprocess and store the data collected by the hardware acquisition system in real time;

[0015] The insulation and zero-drift analysis module analyzes the data processed by the data processing module to infer the zero-drift position cell numbers and calculate the grounding voltage values of each electrolysis workshop and the loss voltage values of each aisle.

[0016] The bus voltages of each workshop, the grounding voltages of each workshop, the aisle bus loss voltages, the first grounding voltages of the work areas and the central grounding voltages of the work areas are dynamically obtained through the real-time data acquisition and transmission module. The real-time total voltage of each work area, the real-time voltage of each electrolytic cell and the bus current are dynamically obtained through the cell control interconnection module.

[0017] Furthermore, the data preprocessing includes filtering and screening abnormal data in the data collected by the hardware collection system to obtain cleaned data.

[0018] Furthermore, the big data analysis system also includes a slot control interconnection module and an APP interconnection module;

[0019] The insulation and zero drift analysis module is connected to the real-time slot control acquisition system of the third-party system through the slot control interconnection module to transmit the real-time slot control data of the third-party system to the insulation and zero drift analysis module;

[0020] The insulation and zero drift analysis module is also connected to the third-party APP system through the APP system interconnection module, so that the operator can understand the zero drift slot number, the grounding point voltage of the work area and the loss voltage of each corridor obtained by the insulation and zero drift analysis module in real time from the third-party APP.

[0021] Furthermore, the big data analysis system also includes a report generation module, which is connected to the insulation and zero drift analysis module and generates corresponding reports according to the final results obtained by the insulation and zero drift analysis module.

[0022] The present invention also provides a method for monitoring online insulation and zero drift of aluminum electrolysis, which uses the above-mentioned online insulation and zero drift monitoring system for aluminum electrolysis to monitor online insulation and zero drift of aluminum electrolysis, and comprises the following steps:

[0023] Step 1: Data collection;

[0024] S1.1. The electrolysis workshop is divided into a workshop 1 and a workshop 2 which are spaced apart from each other, wherein the workshop 1 and the workshop 2 each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the workshop 1 and the workshop 2 are connected by under-trough busbars; and the end of the workshop 1 close to the rectifier workshop is set as the front area of ​​the workshop 1, the end of the workshop 1 away from the rectifier workshop is set as the rear area of ​​the workshop 1, the end of the workshop 2 away from the rectifier workshop is set as the front area of ​​the workshop 2, and the end of the workshop 2 close to the rectifier workshop is set as the rear area of ​​the workshop 2;

[0025] The grounding voltage and bus voltage under the slot of workshop 1 and workshop 2 are obtained through the voltage acquisition terminal;

[0026] S1.2. Obtain the loss voltage value of each corridor through the corridor bus voltage acquisition terminal;

[0027] S1.3, obtain the external electrolytic cell control machine cell voltage Vx and the average current Electric of the electrolytic cells respectively set in each work area in real time through the TCP protocol interface;

[0028] S1.4. Obtain the first grounding voltage of each work area and the middle slot grounding voltage through the partition grounding voltage acquisition terminal;

[0029] Step 2: Calculate the zero drift position;

[0030] Step 3: Send the obtained zero drift slot number to the local display device for liquid crystal display, and send the grounding slot number data to the slot control interconnection module and / or the APP interconnection module, which can be displayed in real time on the slot control interconnection module and / or the APP interconnection module, and can be broadcast in real time by voice;

[0031] Step 4: Collect the loss voltage and ground voltage of the corridors in each work area, calculate the series production loss power consumption within 24 hours through the obtained current, and generate a report to be sent to the slot control interconnection module and / or APP interconnection module for display.

[0032] Furthermore, the specific process of calculating the zero drift position in step 2 is as follows:

[0033] S2.1. Determine whether workshop 1 and workshop 2 are grounded;

[0034] Assume that the electrolysis workshop includes workshop 1 and workshop 2. Both workshop 1 and workshop 2 are equipped with multiple work areas. Each work area contains multiple electrolytic cells. The average voltage V of the electrolytic cells in workshop 1 and workshop 2 is calculated separately.

[0035] If the absolute value of the total voltage of workshop 1 minus the grounding voltage of workshop 1 is less than 1 volt and the absolute value of the total voltage of workshop 2 minus the inter-workshop voltage is less than 1 volt, it is determined that workshop 1 and workshop 2 are not grounded, that is, the outputs of workshop 1 and workshop 2 have no zero drift; otherwise, it is determined that workshop 1 and / or workshop 2 are grounded, that is, the outputs of workshop 1 and / or workshop 2 have zero drift;

[0036] S2.2. When there is grounding in Workshop 1 and / or Workshop 2, determine whether it is single-point grounding;

[0037] Assuming it is single-point grounding, by comparing the grounding voltage of workshop 1 and workshop 2 with the total voltage of the workshop, it is determined whether there is single-point zero drift in workshop 1 or workshop 2;

[0038] When the total voltage of workshop 1 minus the grounding voltage of workshop 1 is greater than the average voltage V1 of a single slot in the workshop, and the total voltage of workshop 2 is less than the grounding voltage of workshop 2, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 1;

[0039] When there is no single-point grounding in workshop 1, and the total voltage of workshop 2 minus the grounding voltage of workshop 2 is greater than the average voltage V2 of a single slot in the workshop, and the total voltage of workshop 1 is less than the grounding voltage of workshop 1, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 2;

[0040] S2.3. When there may be a single-point zero drift in workshop 1 or workshop 2, calculate its drift voltage;

[0041] The drift voltage is equal to the workshop bus voltage minus the workshop ground voltage;

[0042] S2.4, calculate the drift slot number of the single point grounding;

[0043] The real-time voltages of multiple electrolytic cells arranged in each work area are accumulated in sequence from the direction of the 14th work area of ​​the first workshop to the 11th work area and / or from the 21st work area of ​​the second workshop to the 24th work area. If there is a corridor between any two electrolytic cells, the corridor voltage is also accumulated. When the accumulated value is greater than or equal to the drift voltage value, the grounding slot number, that is, the drift slot number, is obtained;

[0044] S2.5. Verify the drift slot number;

[0045] Verify whether the drift slot number is correct by the first grounding voltage of the zone where the drift slot number is located and the central grounding voltage of the zone where the drift slot number is located, and obtain the total voltage of the work area where the drift slot number is located. When the total voltage of the work area is less than the first grounding voltage of the work area, return to step 2.1 and wait for recalculation in the next calculation cycle.

[0046] Furthermore, when calculating the zero drift position, when the total voltage of all electrolytic cells in the work area is less than the grounding voltage of the first cell in the work area, it is judged to be multi-point grounding;

[0047] When workshops 1 and 2 are multi-point grounded, the following process is used to calculate their grounding slot numbers:

[0048] Subtract the total voltage of each work area in the first workshop and / or the second workshop from the grounding voltage of the first unit in the work area to obtain the voltage difference; if the voltage difference is greater than the average voltage of a single slot in the work area, it is determined that the work area is grounded; otherwise, it is determined that the work area is not grounded;

[0049] When the work area is grounded and the central grounding voltage of the work area is equal to 0 volts, it is determined that the front area or the rear area of ​​the work area is grounded;

[0050] Starting from the first grounding voltage of the work area, the real-time slot voltage of the work area is accumulated. When the accumulated slot voltage is greater than or equal to the first grounding voltage of the work area, the grounding slot number of the work area is obtained;

[0051] If the central grounding voltage of the work area is greater than 0 volts, it is determined that the rear area of ​​the work area is grounded, and the real-time slot voltage of the work area is accumulated starting from the central slot of the work area. When the accumulated slot voltage is greater than or equal to the central grounding voltage of the work area, the grounding slot number of the work area is obtained;

[0052] If multiple grounding slot numbers are obtained and distributed in the same workshop, when the total voltage of the workshop minus the grounding voltage of the workshop is greater than the average voltage of the workshop slot, multiple zero drift slot numbers are output, otherwise wait for the next round of recalculation of zero drift;

[0053] If the obtained multi-point grounding slot numbers are distributed in different workshops, the multi-point zero drift slot numbers are directly output.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] The present invention sets a hardware acquisition system to perform zone detection on the voltage of the power workshop, and stores and analyzes the data used by the hardware acquisition system through a big data analysis system to infer the zero drift position slot number and calculate the black voltage value of the rectifier workshop and each work area; and then uses a network voice alarm system to issue a corresponding voice alarm according to the zero drift position inferred by the big data analysis system to remind the operator to perform corresponding operations.

[0056] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0058] Figure 1 It is a schematic diagram of the installation position of a hardware acquisition system in an aluminum electrolysis online insulation and zero drift monitoring system in an embodiment of the present invention.

[0059] in:

[0060] 1. Voltage collection terminal, 2. Work area grounding collection terminal, 3. Corridor bus voltage collection terminal, 4. Local display device. DETAILED DESCRIPTION

[0061] In order to make the above-mentioned purposes, features and advantages of the present invention more clear and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings of the present invention are all simplified and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the implementation of the present invention; the "number" mentioned in the present invention is not limited to the specific number in the examples in the accompanying drawings; the directions or positional relationships indicated by "front", "middle", "back", "left", "right", "up", "down", "top", "bottom", "middle", etc. mentioned in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor can they be understood as limitations on the present invention.

[0062] Example:

[0063] The invention provides an aluminum electrolysis online insulation and zero drift monitoring system, including a hardware acquisition system, a big data analysis system and a network voice alarm system;

[0064] It is assumed that the production workshop is divided into a rectifier workshop and an electrolysis workshop, and the electrolysis workshop is divided into a first workshop and a second workshop spaced apart from each other, wherein the first workshop and the second workshop each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the first workshop and the second workshop are connected by under-trough busbars;

[0065] The hardware acquisition system is used to detect the total voltage of the electrolysis workshop, the grounding voltage of the electrolysis workshop, the bus loss voltage of each corridor, and the first and central grounding voltage of each work area;

[0066] The big data analysis system is used to store and analyze the data collected by the hardware acquisition system, infer the zero drift position slot number, and calculate the loss voltage values ​​of workshop one, workshop two and each corridor.

[0067] Preferably, the big data analysis system is deployed in a computer room of a series of microcomputer stations, connected to the hardware acquisition system via optical fiber Ethernet, and realizes real-time communication with the equipment.

[0068] Preferably, the hardware acquisition system includes a voltage acquisition terminal 1, a work area grounding acquisition terminal 2, and a corridor bus voltage acquisition terminal 3;

[0069] The voltage acquisition terminal 1 is installed in the rectifier workshop, and is used to respectively collect the total voltage and ground voltage of the first workshop and the second workshop, and transmit them to the big data analysis system;

[0070] The work area grounding acquisition terminal 2 is provided with multiple groups arranged in a one-to-one correspondence with multiple work areas, a single group of work area grounding acquisition terminals 2 is arranged in a single work area, and a single group of work area grounding acquisition terminals 2 is provided with two installed in the first slot and the central slot of a single work area, for respectively collecting the grounding voltage of the first slot and the central slot of a single work area, and sending them to the big data analysis system;

[0071] The corridor bus voltage collection terminal is provided with multiple groups arranged in a one-to-one correspondence with multiple corridors. A single group of corridor bus voltage collection terminals is arranged in a single corridor, and a single group of corridor bus voltage collection terminals is provided with two respectively installed on different cross-sections of a single corridor. The two corridor bus voltage collection terminals respectively collect voltages at two different cross-sections of the corridor to obtain the pressure difference of a single corridor, and send it to the big data analysis system.

[0072] Further preferably, the hardware acquisition system also includes an on-site display device 4, which is provided with a plurality of pieces corresponding to each work area. The zero drift position slot number, the pressure difference value between each corridor, and the first grounding voltage value and the central grounding voltage value of each work area are obtained through analysis by the big data analysis system, and the zero drift position slot number, the pressure difference value between each corridor, and the first grounding voltage value and the central grounding voltage value of each work area are sent to each on-site display device, and each on-site display device displays the zero drift slot number, the grounding point voltage of the work area and / or the voltage of each corridor through a liquid crystal screen. Further preferably, the voltage acquisition terminal 1 is preferably configured as a current and voltage isolation transmitter.

[0073] Preferably, the big data analysis system includes a data processing module and an insulation and zero drift analysis module;

[0074] The data processing module is connected to the hardware acquisition system via optical fiber Ethernet to receive, pre-process and store the data collected by the hardware acquisition system in real time;

[0075] The insulation and zero drift analysis module analyzes the data processed by the data processing module to infer the zero drift position slot number and calculate the grounding voltage value of each electrolysis workshop and the loss voltage value of each corridor.

[0076] The bus voltage of each workshop, the grounding voltage of each workshop, the bus loss voltage in the corridor, the first grounding voltage in the work area and the central grounding voltage in the work area are dynamically acquired through the real-time data acquisition and transmission module. The real-time total voltage of each work area, the real-time voltage of each electrolytic cell and the bus current are dynamically acquired through the slot control interconnection module.

[0077] Further preferably, the data preprocessing includes filtering and screening abnormal data in the data collected by the hardware acquisition system to obtain cleaned data.

[0078] More preferably, the specific process of filtering and screening abnormal data is as follows:

[0079] ①、The real-time voltage sampling value V collected by the hardware acquisition system X (The voltage sampling values ​​include the corridor loss voltage, workshop grounding voltage, first grounding voltage in the work area, and central grounding voltage in the work area) are cached, and the average voltage V in the last 15 minutes is calculated by polling. avg ;

[0080] ②. Input adjustable parameters;

[0081] The adjustable parameters of filtering algorithm 1 are set as follows: the absolute value judgment threshold k including the sampling voltage and the voltage average value 1 , abnormal algorithm counter Count0 and weight value z 1 , when Count0 is greater than a certain set maximum value, it is judged as normal fluctuation data;

[0082] The adjustable parameters of filtering algorithm 2 are set as follows: the absolute value judgment threshold k of the fluctuation speed change slope of the current sampling voltage and the previous sampling voltage 2 , abnormal algorithm counter Count1 and weight value z 2 ; When Count1 is greater than a certain set maximum value, it is judged as normal fluctuation data;

[0083] ③ If V X -V avg Greater than V avg ×k 1 (k 1 The value of 0.5) is used, the abnormal algorithm counter Count0 is increased once. When Count0 < 60 (the coefficient is adjustable), it is judged as abnormal data, which means that the voltage sampling value V X Equal to the average voltage V avg ; If Count0 ≥ 60 (the coefficient is adjustable), it is judged as normal fluctuation data and sampling is performed according to the current voltage value;

[0084] The real-time sampling voltage value V X Compared with the last sampled voltage value V (X-1) Calculate and get the absolute value of the slope k. When k 2 The value is greater than 2.5, the abnormal algorithm counter Count1 is incremented once, when Count1 < 60 times (the coefficient is adjustable), it is judged as abnormal data, then the sampling value V X =V (X-1)If Count1 ≥ 60 (the coefficient is adjustable), it is determined to be normal fluctuation data and sampling is performed according to the current voltage value.

[0085] Furthermore, the current voltage value used for sampling is determined as follows:

[0086] When z 1 >z 2 When , the weight of filtering algorithm 1 is used for priority determination, which is specifically:

[0087] When both filter algorithm 1 and filter algorithm 2 determine that the data is abnormal, the current voltage value used for sampling is the voltage average value V avg ;

[0088] When both filtering algorithm 1 and filtering algorithm 2 determine that the data is normal fluctuation data, the current voltage value used for sampling is the real-time sampling voltage value V X ;

[0089] When filter algorithm 1 determines that the data is abnormal and filter algorithm 2 determines that the data is normal fluctuation data, the current voltage value used for sampling is the voltage average value V avg ;

[0090] When filter algorithm 1 determines that the data is normal fluctuation data and filter algorithm 2 determines that the data is abnormal data, the current voltage value used for sampling is the last sampled voltage value V (X-1) ;

[0091] When z 2 >z 1 When , the weight of filtering algorithm 2 is used for priority judgment, which is specifically:

[0092] When both filter algorithm 1 and filter algorithm 2 determine that the data is abnormal, the current voltage value used for sampling is the last sampled voltage value V (X-1) ;

[0093] When both filtering algorithm 1 and filtering algorithm 2 determine that the data is normal fluctuation, the current voltage value used for sampling is the real-time sampling voltage value V X ;

[0094] When filter algorithm 1 determines that the data is abnormal and filter algorithm 2 determines that the data is normal fluctuation data, the current voltage value used for sampling is the voltage average value V avg ;

[0095] When filter algorithm 1 determines that the data is normal fluctuation data and filter algorithm 2 determines that the data is abnormal data, the current voltage value used for sampling is the last sampled voltage value V (X-1) .

[0096] As a further technical solution of the present invention, the big data analysis system further includes a slot control interconnection module and an APP interconnection module;

[0097] The insulation and zero drift analysis module is connected to the real-time slot control acquisition system of the third-party system through the slot control interconnection module to transmit the real-time slot control data of the third-party system to the insulation and zero drift analysis module;

[0098] The insulation and zero drift analysis module is also connected to the third-party APP system through the APP system interconnection module, so that the operator can understand the zero drift slot number, the grounding point voltage of the work area and the voltage of each corridor obtained by the insulation and zero drift analysis module in real time from the third-party APP.

[0099] Preferably, the tank control interconnection module is responsible for acquiring real-time tank control data, extracting real-time voltage and real-time current data of the electrolytic cell in the tank control system by connecting with the tank control database and the cache database, and storing the data after cleaning for analysis; and obtaining the analysis results of the insulation and zero drift analysis module and sending them to the third-party tank control system for fault reminder, and the third-party tank control system sends the grounding tank number to its network voice alarm system for partition voice broadcast reminder.

[0100] As a further technical solution of the present invention, the big data analysis system also includes a report generation module, which is connected to the insulation and zero drift analysis module and generates corresponding reports based on the final results obtained by the insulation and zero drift analysis module.

[0101] Preferably, the report can be set as a daily report, a shift report (ie, an 8-hour report), an hourly report, etc. according to actual needs.

[0102] Preferably, a single report can be configured to include tables and / or charts according to actual needs.

[0103] As a further embodiment of the present invention, see Figure 1 As shown, the power workshop is divided into a rectifier workshop, four zone workshops and four corridors, and the online insulation and zero drift monitoring method of aluminum electrolysis includes the following steps:

[0104] Step 1: Data collection;

[0105] S1.1. The electrolysis workshop is divided into a workshop 1 and a workshop 2 which are spaced apart from each other, wherein the workshop 1 and the workshop 2 each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the workshop 1 and the workshop 2 are connected by under-trough busbars; and the end of the workshop 1 close to the rectifier workshop is set as the front area of ​​the workshop 1, the end of the workshop 1 away from the rectifier workshop is set as the rear area of ​​the workshop 1, the end of the workshop 2 away from the rectifier workshop is set as the front area of ​​the workshop 2, and the end of the workshop 2 close to the rectifier workshop is set as the rear area of ​​the workshop 2;

[0106] The grounding voltage and bus voltage under the slot of workshop 1 and workshop 2 are obtained through the voltage acquisition terminal, and the grounding voltage of workshop 1 is set to vwg01, the grounding voltage of workshop 2 is set to vwg02, the bus voltage under the slot of workshop 1 is set to vm01, and the bus voltage under the slot of workshop 2 is set to vm02;

[0107] S1.2. Obtain the loss voltage value of each corridor through the corridor bus voltage acquisition terminal; specifically, assuming that workshop 1 and workshop 2 are each equipped with five corridors, then the loss voltage value of the first corridor of workshop 1 is set to vs11, the loss voltage value of the second corridor of workshop 1 is set to vs12, the loss voltage value of the third corridor of workshop 1 is set to vs13, the loss voltage value of the fourth corridor of workshop 1 is set to vs14, the loss voltage value of the fifth corridor of workshop 1 is set to vs15, the loss voltage value of the first corridor of workshop 2 is set to vs21, the loss voltage value of the second corridor of workshop 2 is set to vs22, the loss voltage value of the third corridor of workshop 2 is set to vs23, the loss voltage value of the fourth corridor of workshop 2 is set to vs24, and the loss voltage value of the fifth corridor of workshop 2 is set to vs25;

[0108] S1.3, obtain the voltage Vx of the electrolytic cell control machine and the average current Electric of the electrolytic cells respectively set in each work area in real time through the TCP protocol interface; specifically, assuming that the total number of electrolytic cells in each work area is 2156, the voltage of the electrolytic cells in each work area is (V 1001 ,V 1002 ,V 1003 ,…,V 2156 ), then, Vx=(V 1001 ,V 1002 ,V 1003 ,…,V 2156 );

[0109] S1.4. Obtain the first grounding voltage and the middle slot grounding voltage of each work area through the partition grounding voltage acquisition terminal; among them, the first grounding voltage of work area 11 is represented by vgf11, and the middle slot grounding voltage of work area 11 is represented by vgc11; the first grounding voltage of work area 12 is represented by vgf12, and the middle slot grounding voltage of work area 12 is represented by vgc12; the first grounding voltage of work area 13 is represented by vgf13, and the middle slot grounding voltage of work area 13 is represented by vgc13; the first grounding voltage of work area 14 is represented by vgf14, and the middle slot grounding voltage of work area 14 is represented by vgc14. The grounding voltage of the middle slot in the second and third work areas is represented by vgc14, the grounding voltage of the first slot in the second and first work areas is represented by vgf21, the grounding voltage of the middle slot in the second and first work areas is represented by vgc21, the grounding voltage of the first slot in the second and second work areas is represented by vgf22, the grounding voltage of the middle slot in the second and second work areas is represented by vgc22, the grounding voltage of the first slot in the second and third work areas is represented by vgf23, the grounding voltage of the middle slot in the second and third work areas is represented by vgc23, the grounding voltage of the first slot in the second and fourth work areas is represented by vgf24, and the grounding voltage of the middle slot in the second and second work areas is represented by vgc24;

[0110] Step 2: Calculate the zero drift position;

[0111] S2.1. Determine whether workshop 1 and workshop 2 are grounded;

[0112] Assume that the electrolysis workshop includes workshop 1 and workshop 2, and each workshop 1 and workshop 2 are provided with multiple work areas, each work area contains multiple electrolytic cells, and the average voltage V of the electrolytic cells of workshop 1 and workshop 2 is calculated respectively to obtain the average voltage V1 of a single cell in workshop 1 and the average voltage V2 of a single cell in workshop 2;

[0113] If the absolute value of the total voltage of workshop 1 minus the grounding voltage of workshop 1 is less than 1 volt and the absolute value of the total voltage of workshop 2 minus the inter-workshop voltage is less than 1 volt, then it is determined that workshop 1 and workshop 2 are not grounded, that is, both workshop 1 and workshop 2 output no zero drift; otherwise, it is determined that both workshop 1 and workshop 2 are grounded, that is, both workshop 1 and workshop 2 output zero drift;

[0114] S2.2. When both workshop 1 and workshop 2 are grounded, determine whether they are single-point grounded;

[0115] Assuming it is single-point grounding, by comparing the grounding voltage of workshop 1 and workshop 2 with the total voltage of the workshop, it is determined whether there is single-point zero drift in workshop 1 or workshop 2;

[0116] When the total voltage of workshop 1 minus the grounding voltage of workshop 1 is greater than the average voltage V1 of a single slot in the workshop, and the total voltage of workshop 2 is less than the grounding voltage of workshop 2, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 1;

[0117] When there is no single-point grounding in workshop 1, and the total voltage of workshop 2 minus the grounding voltage of workshop 2 is greater than the average voltage V2 of a single slot in the workshop, and the total voltage of workshop 1 is less than the grounding voltage of workshop 1, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 2;

[0118] S2.3. When there may be a single-point zero drift in workshop 1 or workshop 2, calculate its drift voltage;

[0119] The drift voltage is equal to the workshop bus voltage minus the workshop ground voltage;

[0120] S2.4, calculate the drift slot number of the single point grounding;

[0121] The real-time voltages of multiple electrolytic cells in each work area are accumulated in sequence from the direction of the 14th work area of ​​the first workshop to the 11th work area and / or from the 21st work area of ​​the second workshop to the 24th work area (i.e., V sum =V 通廓 +V 1001 +V 1002 +…+V XXXX , where V sum V is the value after the real-time voltage of multiple electrolytic cells in each work area is accumulated in sequence. 通廓 is the real-time voltage value of the corridor). If any two electrolytic cells span a corridor, the corridor voltage is also accumulated. When the accumulated value is greater than or equal to the drift voltage value (i.e., Vsum ≥ drift voltage), the grounding slot number, i.e., the drift slot number, is obtained.

[0122] S2.5. Verify the drift slot number;

[0123] Verify whether the drift slot number is correct by using the first grounding voltage of the partition and the central grounding voltage of the partition, and obtain the total voltage of the work area where the drift slot number is located. When the total voltage of the work area is less than the first grounding voltage of the work area, return to step 2.1 and wait for the next calculation cycle to recalculate;

[0124] Specifically, when the total voltage of the work area where the drift slot number is located is greater than the grounding voltage of the first unit in the work area, and the central grounding voltage of the work area is equal to 0 volts, it is judged that there is grounding in the front or rear area of ​​the work area (workshop one is judged as the front area, and workshop two is judged as the rear area), and the slot voltages of the work area are accumulated. When the sum of the slot voltages of the work area is greater than the first grounding voltage, the grounding slot number of the work area is obtained; if the central grounding voltage of the work area is greater than 0 volts, it is judged that there is grounding in the front or rear area of ​​the work area (workshop one is judged as the rear area, and workshop two is judged as the front area), and the slot voltages are accumulated starting from the central slot of the work area. When the accumulated slot voltage is greater than or equal to the central grounding voltage of the work area, the grounding slot number of the work area is obtained;

[0125] Compare the work area grounding slot number with the series grounding slot number. If the slot number differs between ±2, the zero drift slot number is obtained. Otherwise, return to step 2.1 and wait for the next calculation cycle to recalculate.

[0126] S2.6. The obtained zero drift slot number is sent to the local display device for LCD display, and the grounding slot number data is sent to the slot control interconnection module and the APP interconnection module. It can be displayed in real time on the slot control interconnection module and the APP interconnection module, and can be broadcast in real time by voice.

[0127] Furthermore, when calculating the zero drift position, when the total voltage of all electrolytic cells in the work area is less than the grounding voltage of the first cell in the work area, it is judged to be multi-point grounding;

[0128] When workshops 1 and 2 are multi-point grounded, the following process is used to calculate their grounding slot numbers:

[0129] Subtract the total voltage of each work area in the first workshop and / or the second workshop from the grounding voltage of the first unit in the work area to obtain the voltage difference; if the voltage difference is greater than the average voltage of a single slot in the work area, it is determined that the work area is grounded; otherwise, it is determined that the work area is not grounded;

[0130] When the work area is grounded and the central grounding voltage of the work area is equal to 0 volts, it is judged that the front area or the rear area of ​​the work area is grounded (the first workshop is judged as the front area, and the second workshop is judged as the rear area);

[0131] Starting from the first grounding voltage of the work area, the real-time slot voltage of the work area is accumulated. When the accumulated slot voltage is greater than or equal to the first grounding voltage of the work area, the grounding slot number of the work area is obtained;

[0132] If the central grounding voltage of the work area is greater than 0 volts, it is determined that the rear area of ​​the work area is grounded, and the real-time slot voltage of the work area is accumulated starting from the central slot of the work area. When the accumulated slot voltage is greater than or equal to the central grounding voltage of the work area, the grounding slot number of the work area is obtained;

[0133] If multiple grounding slot numbers are obtained and distributed in the same workshop, when the total voltage of the workshop minus the grounding voltage of the workshop is greater than the average voltage of the workshop slot, multiple zero drift slot numbers are output, otherwise wait for the next round of recalculation of zero drift;

[0134] If the obtained multi-point grounding slot numbers are distributed in different workshops, the multi-point zero drift slot numbers are directly output.

[0135] Furthermore, assuming that the number of electrolytic cells in a single work area is 50, the calculation method of the average voltage of a single cell in each work area is:

[0136] The average voltage of a single slot in a workshop and a work area is VA1 = AVG (V 1001 +V 1002 +…+V 1050 );

[0137] The average voltage of a single slot in the second work area of ​​the first workshop is VA2 = AVG (V 1051 +V 1052 +…+V 1100 );

[0138] The average voltage of a single slot in the three work areas of a workshop is VA3 = AVG (V 1101 +V 1102 +…+V 1150 );

[0139] The average voltage of a single slot in the four work areas of a workshop is VA4 = AVG (V 1151 +V 1152 +…+V 1200 );

[0140] The average voltage of a single slot in the first work area of ​​the second workshop is VA5 = AVG (V 2001 +V 2002 +…+V 2050 );

[0141] The average voltage of a single slot in the second work area of ​​the second workshop is VA6 = AVG (V 2051 +V 2052 +…+V 2100 );

[0142] The average voltage of a single slot in the third work area of ​​the second workshop is VA7 = AVG (V 2101 +V 2102 +…+V 2150 );

[0143] The average voltage of a single slot in the fourth work area of ​​the second workshop is VA8 = AVG (V 2151 +V 2152 +…+V 2200 ).

[0144] Step 3: Collect the loss voltage and ground voltage of the corridors in each work area, calculate the series production loss power consumption within 24 hours through the obtained current, and form a report for display.

[0145] Preferably, the expressions of the total loss voltage of the electrolysis workshop, the loss voltage of the first workshop, the loss voltage of the second workshop and the loss voltage of the corridor are as follows;

[0146]

[0147] The loss voltage of a workshop = (vs11+vs12+vs13+vs14+vs15)×current×24 hours;

[0148] The loss voltage of the second workshop = (vs21+vs22+vs23+vs24+vs25)×current×24 hours;

[0149] Corridor loss voltage = (vs11 + vs12) × current × 24 hours.

[0150] 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. An aluminum electrolysis online insulation and zero drift monitoring system, characterized in that: Including hardware acquisition system, big data analysis system, network voice alarm system; It is assumed that the production workshop is divided into a rectifier workshop and an electrolysis workshop, and the electrolysis workshop is divided into a first workshop and a second workshop spaced apart from each other, wherein the first workshop and the second workshop each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the first workshop and the second workshop are connected by under-trough busbars; The hardware acquisition system is used to detect the total voltage of the electrolysis workshop, the grounding voltage of the electrolysis workshop, the voltage of each corridor bus, and the first and central grounding voltage of each work area; The big data analysis system is used to store and analyze the data collected by the hardware acquisition system, infer the zero drift position slot number, and calculate the loss voltage values ​​of workshop one, workshop two and each corridor.

2. The aluminum electrolysis online insulation and zero drift monitoring system according to claim 1 is characterized in that: The hardware acquisition system includes a voltage acquisition terminal, a work area grounding acquisition terminal and a corridor bus voltage acquisition terminal; The voltage acquisition terminal is installed in the rectifier workshop, and is used to respectively collect the total voltage and ground voltage of workshop one and workshop two, and transmit them to the big data analysis system; The work area grounding collection terminal is provided with multiple groups arranged in one-to-one correspondence with multiple work areas, a single group of work area grounding collection terminals is arranged in a single work area, and the single group of work area grounding collection terminals is provided with two installed in the first slot and the central slot of a single work area, for respectively collecting the grounding voltage of the first slot and the central slot of a single work area, and sending them to the big data analysis system; The corridor bus voltage collection terminal is provided with multiple groups arranged in a one-to-one correspondence with multiple corridors. A single group of corridor bus voltage collection terminals is arranged in a single corridor, and a single group of corridor bus voltage collection terminals is provided with two respectively installed on different cross-sections of a single corridor. The two corridor bus voltage collection terminals respectively collect voltages at two different cross-sections of the corridor to obtain the pressure difference of a single corridor, and send it to the big data analysis system.

3. The aluminum electrolysis online insulation and zero drift monitoring system according to claim 2 is characterized in that: The hardware acquisition system also includes an on-site display device, which is provided with a plurality of on-site display devices respectively corresponding to each work area. The zero point drift position slot number, the pressure difference value between each corridor, and the first grounding voltage value and the central grounding voltage value of each work area are analyzed by the big data analysis system, and the zero point drift position slot number, the pressure difference value between each corridor, and the first grounding voltage value and the central grounding voltage value of each work area are sent to each on-site display device. Each on-site display device displays the zero point drift slot number, the grounding point voltage of the work area and / or the voltage of each corridor through a liquid crystal screen.

4. The aluminum electrolysis online insulation and zero drift monitoring system according to any one of claims 1 to 3, characterized in that: The big data analysis system includes a data processing module and an insulation and zero drift analysis module; The data processing module is connected to the hardware acquisition system via optical fiber Ethernet to receive, pre-process and store the data collected by the hardware acquisition system in real time; The insulation and zero drift analysis module analyzes the data processed by the data processing module to infer the zero drift position slot number and calculate the grounding voltage value of each electrolysis workshop and the loss voltage value of each corridor; The bus voltage of each workshop, the grounding voltage of each workshop, the bus loss voltage in the corridor, the first grounding voltage in the work area and the central grounding voltage in the work area are dynamically acquired through the real-time data acquisition and transmission module. The real-time total voltage of each work area, the real-time voltage of each electrolytic cell and the bus current are dynamically acquired through the slot control interconnection module.

5. The aluminum electrolysis online insulation and zero drift monitoring system according to claim 4 is characterized in that: The data preprocessing includes filtering and screening abnormal data in the data collected by the hardware collection system to obtain cleaned data.

6. The aluminum electrolysis online insulation and zero drift monitoring system according to claim 5 is characterized in that: The big data analysis system also includes a slot control interconnection module and an APP interconnection module; The insulation and zero drift analysis module is connected to the real-time slot control acquisition system of the third-party system through the slot control interconnection module to transmit the real-time slot control data of the third-party system to the insulation and zero drift analysis module; The insulation and zero drift analysis module is also connected to the third-party APP system through the APP system interconnection module, so that the operator can understand the zero drift slot number, the grounding point voltage of the work area and the loss voltage of each corridor obtained by the insulation and zero drift analysis module in real time from the third-party APP.

7. The aluminum electrolysis online insulation and zero drift monitoring system according to claim 6 is characterized in that: The big data analysis system also includes a report generation module, which is connected to the insulation and zero drift analysis module and generates corresponding reports according to the final results obtained by the insulation and zero drift analysis module.

8. A method for online insulation and zero drift monitoring of aluminum electrolysis, characterized in that: The aluminum electrolysis online insulation and zero drift monitoring system as claimed in claim 7 is used to perform aluminum electrolysis online insulation and zero drift monitoring, which includes the following steps: Step 1: Data collection; S1.

1. The electrolysis workshop is divided into a workshop 1 and a workshop 2 which are spaced apart from each other, wherein the workshop 1 and the workshop 2 each include a plurality of work areas spaced apart from each other, and two adjacent work areas are connected by corridors, and the corridors and the workshop 1 and the workshop 2 are connected by under-trough busbars; and the end of the workshop 1 close to the rectifier workshop is set as the front area of ​​the workshop 1, the end of the workshop 1 away from the rectifier workshop is set as the rear area of ​​the workshop 1, the end of the workshop 2 away from the rectifier workshop is set as the front area of ​​the workshop 2, and the end of the workshop 2 close to the rectifier workshop is set as the rear area of ​​the workshop 2; The grounding voltage and bus voltage under the slot of workshop 1 and workshop 2 are obtained through the voltage acquisition terminal; S1.

2. Obtain the loss voltage value of each corridor through the corridor bus voltage acquisition terminal; S1.3, obtain the external electrolytic cell control machine cell voltage Vx and the average current Electric of the electrolytic cells respectively set in each work area in real time through the TCP protocol interface; S1.

4. Obtain the first grounding voltage of each work area and the middle slot grounding voltage through the partition grounding voltage acquisition terminal; Step 2: Calculate the zero drift position; Step 3: Send the obtained zero drift slot number to the local display device for liquid crystal display, and send the grounding slot number data to the slot control interconnection module and / or the APP interconnection module, which can be displayed in real time on the slot control interconnection module and / or the APP interconnection module, and can be broadcast in real time by voice; Step 4: Collect the loss voltage and ground voltage of the corridors in each work area, calculate the series production loss power consumption within 24 hours through the obtained current, and generate a report to be sent to the slot control interconnection module and / or APP interconnection module for display.

9. The method for monitoring online insulation and zero drift of aluminum electrolysis according to claim 8, characterized in that: The specific process of calculating the zero drift position in step 2 is as follows: S2.

1. Determine whether workshop 1 and workshop 2 are grounded; Assume that the electrolysis workshop includes workshop 1 and workshop 2. Both workshop 1 and workshop 2 are equipped with multiple work areas. Each work area contains multiple electrolytic cells. The average voltage V of the electrolytic cells in workshop 1 and workshop 2 is calculated separately. If the absolute value of the total voltage of workshop 1 minus the grounding voltage of workshop 1 is less than 1 volt and the absolute value of the total voltage of workshop 2 minus the inter-workshop voltage is less than 1 volt, it is determined that workshop 1 and workshop 2 are not grounded, that is, the outputs of workshop 1 and workshop 2 have no zero drift; otherwise, it is determined that workshop 1 and / or workshop 2 are grounded, that is, the outputs of workshop 1 and / or workshop 2 have zero drift; S2.

2. When there is grounding in Workshop 1 and / or Workshop 2, determine whether it is single-point grounding; Assuming it is single-point grounding, by comparing the grounding voltage of workshop 1 and workshop 2 with the total voltage of the workshop, it is determined whether there is single-point zero drift in workshop 1 or workshop 2; When the total voltage of workshop 1 minus the grounding voltage of workshop 1 is greater than the average voltage V1 of a single slot in the workshop, and the total voltage of workshop 2 is less than the grounding voltage of workshop 2, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 1; When there is no single-point grounding in workshop 1, and the total voltage of workshop 2 minus the grounding voltage of workshop 2 is greater than the average voltage V2 of a single slot in the workshop, and the total voltage of workshop 1 is less than the grounding voltage of workshop 1, and the absolute value of the sum of the grounding voltage of workshop 1 and the grounding voltage of workshop 2 minus the sum of the total voltage of workshop 1 and the total voltage of workshop 2 is less than 1 volt, it is judged that there is a single-point grounding in workshop 2; S2.

3. When there may be a single-point zero drift in workshop 1 or workshop 2, calculate its drift voltage; The drift voltage is equal to the workshop bus voltage minus the workshop ground voltage; S2.4, calculate the drift slot number of the single point grounding; The real-time voltages of multiple electrolytic cells arranged in each work area are accumulated in sequence from the direction of the 14th work area of ​​the first workshop to the 11th work area and / or from the 21st work area of ​​the second workshop to the 24th work area. If there is a corridor between any two electrolytic cells, the corridor voltage is also accumulated. When the accumulated value is greater than or equal to the drift voltage value, the grounding slot number, that is, the drift slot number, is obtained; S2.

5. Verify the drift slot number; Verify whether the drift slot number is correct by the first grounding voltage of the zone where the drift slot number is located and the central grounding voltage of the zone where the drift slot number is located, and obtain the total voltage of the work area where the drift slot number is located. When the total voltage of the work area is less than the first grounding voltage of the work area, return to step 2.1 and wait for recalculation in the next calculation cycle.

10. The method for monitoring insulation and zero drift of aluminum electrolysis online according to claim 9, characterized in that: When calculating the zero drift position, if the total voltage of all electrolytic cells in the work area is less than the grounding voltage of the first cell in the work area, it is judged to be multi-point grounding; When workshops 1 and 2 are multi-point grounded, the following process is used to calculate their grounding slot numbers: Subtract the total voltage of each work area in Workshop 1 and / or Workshop 2 from the grounding voltage of the first unit in the work area to obtain the voltage difference; If the voltage difference is greater than the average voltage of a single slot in the work area, it is determined that the work area is grounded; Otherwise, it is determined that there is no grounding in the work area; When the work area is grounded and the central grounding voltage of the work area is equal to 0 volts, it is determined that the front area or the rear area of ​​the work area is grounded; Starting from the first grounding voltage of the work area, the real-time slot voltage of the work area is accumulated. When the accumulated slot voltage is greater than or equal to the first grounding voltage of the work area, the grounding slot number of the work area is obtained; If the central grounding voltage of the work area is greater than 0 volts, it is determined that the rear area of ​​the work area is grounded, and the real-time slot voltage of the work area is accumulated starting from the central slot of the work area. When the accumulated slot voltage is greater than or equal to the central grounding voltage of the work area, the grounding slot number of the work area is obtained; If multiple grounding slot numbers are obtained and distributed in the same workshop, when the total voltage of the workshop minus the grounding voltage of the workshop is greater than the average voltage of the workshop slot, multiple zero drift slot numbers are output, otherwise wait for the next round of recalculation of zero drift; If the obtained multi-point grounding slot numbers are distributed in different workshops, the multi-point zero drift slot numbers are directly output.

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