Intelligent test system for power test

Abstract

The invention relates to the technical field of power equipment testing, in particular to a power test intelligent testing system which comprises a nameplate analysis module, a channel optimization module, a path configuration module, an interference identification module and an excitation regulation and control module. According to the method, the content of the nameplate of the equipment is extracted through image recognition to complete structural analysis of electrical parameters, a parameter feature set is established through information such as frequency, capacity, phase number and current, and test channel screening is achieved according to a set frequency point and channel capacity matching relation. The method comprises the steps of setting a path sorting mode and mapping response time parameters in combination with physical wiring characteristics and a phase number structure, marking channel combination interference levels based on an inductive interference identification mode, optimizing channel interference in an excitation process by adjusting an excitation sequence and a grounding strategy, and executing interval discrete regulation and control operation in combination with a frequency interval real-time judgment result. And collaborative optimization of test path construction, interference control and excitation sequence allocation is realized.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, and in particular to an intelligent power testing system. Background Technology

[0002] The field of power equipment testing technology involves technical activities that test and analyze the electrical performance parameters of various key power system equipment during operation, maintenance, and fault diagnosis. Core aspects include measuring electrical parameters such as insulation, resistance, voltage, current, dielectric loss, and capacitance of power equipment such as motors, transformers, circuit breakers, cables, surge arresters, and switching devices. These parameters are then combined with testing standards to conduct condition assessments and lifespan predictions. This technical field encompasses multiple aspects, including field testing, laboratory testing, electrical parameter monitoring, and data recording. It is widely used in power system operation and maintenance, repair, project acceptance, and periodic equipment testing, and is a crucial supporting technology for ensuring the safety of the power grid and the reliability of equipment operation. Among them, the traditional intelligent power testing system refers to an integrated device used to conduct parameter detection and data recording of power equipment. The technical matters it addresses are the organization and execution of standard power test items such as insulation test, dielectric loss measurement, and loop resistance test of power equipment under field conditions. The traditional intelligent power testing system uses the bridge method for dielectric loss angle measurement, the steady-state current method for loop resistance test, the DC high voltage method for insulation resistance test, and the voltage application and sampling synchronous acquisition method for capacitance and leakage current detection. The implementation means are mostly based on portable test devices, combined with multi-channel sampling circuits and automatic discrimination logic to complete data acquisition and test process control.

[0003] Existing technologies lack structured identification methods for nameplate information during power equipment testing, leading to reliance on manual judgment of parameter compatibility for test channel configuration. The setting of electrical parameter measurement paths does not take into account the physical layout and response characteristics of the channels, resulting in high randomness in path selection and unstable test timing. In multi-channel concurrent scenarios, there is a lack of detection and dynamic control mechanisms for interference relationships between channels, which can easily lead to the superposition of induced interference affecting the accuracy of parameter readings. When the channel excitation sequence remains unchanged, there is a problem of data deviation caused by induced overlap between adjacent channels. The uniform grounding settings fail to distinguish interference levels, which increases the risk of current crosstalk. Summary of the Invention

[0004] To address the shortcomings of existing technologies, such as the lack of structured identification methods for nameplate information, which necessitates manual judgment of parameter compatibility in test channel configuration, the failure to consider channel physical layout and response characteristics in electrical parameter measurement path setting leading to high randomness in path selection and unstable test timing, the lack of detection and dynamic control mechanisms for inter-channel interference in multi-channel concurrent scenarios (easily resulting in induced interference superposition affecting parameter reading accuracy), the problem of data deviation caused by induced overlap between adjacent channels when the channel excitation sequence remains unchanged, and the increased risk of current crosstalk due to the inability to differentiate interference levels in uniform grounding settings, this invention provides an intelligent power testing system. The technical solution is as follows: On the one hand, an intelligent testing system for power testing is provided, which includes: The nameplate parsing module acquires the image content of the power equipment nameplate, extracts the frequency field and matches it with the power frequency standard frequency point table to complete the frequency feature positioning, extracts the capacity field content and converts it into a unified kVA value, extracts the phase number segment content and performs single-phase, two-phase or three-phase structure classification, and generates a nameplate parameter structure vector group. The channel selection module matches the frequency point information of the channel in the power test with the nameplate parameter structure vector group, extracts the frequency matching channel number, sorts the capacity values ​​with the difference in the execution amplitude in the channel load capacity list according to the capacity value, and generates a target test channel set. The path configuration module calls the target test channel set, and based on the physical layout distance corresponding to the channel number and the list of wiring intervals between channels, combined with the phase number classification, confirms the number of channels required for the test and generates the path sequence configuration result. The interference identification module uses the number marked as the excitation start channel in the path sequence configuration result, applies a fixed pulse width excitation current signal in the no-load state, and collects the amplitude of the induced current response signal of the adjacent numbered channels to generate an interference identification map of the test path.

[0005] As a further embodiment of the present invention, the nameplate parameter structure vector group includes frequency characteristic category, capacity value standard, phase number structure classification, and rated current ampere value; the target test channel set includes frequency matching channel number, load capacity proximity number, and redundant path number; the path sequence configuration result includes wiring sequence list, time offset value, and channel response mapping relationship; and the test path interference identification diagram includes current amplitude ratio label, excitation time difference mark, and interference level combination.

[0006] As a further aspect of the present invention, the nameplate parsing module includes: The image data extraction submodule acquires the image content of the nameplate of the power equipment, scans the image area frame by frame and removes blurry images, extracts the text area image using the text area detection instruction, divides the independent field area by combining the character connectivity judgment instruction, and compares the spatial position of the four types of label text (frequency, capacity, number of phases, and current) with the corresponding value pairs according to the character arrangement position in the field area to generate the field image mapping result. Based on the field image mapping result, the field feature processing submodule segments the character boundary region, obtains the character structure encoding, maps it to the corresponding digital symbol sequence, performs frequency point matching by comparing the extracted frequency value with the standard frequency point interval table, calls the image region marked as the capacity field to perform the same operation, extracts the capacity value and converts it into a unified kVA value, and obtains the power frequency standard matching point and kVA capacity value pair. The structural state recognition submodule calls the image area marked as phase number segment and rated current field according to the power frequency standard matching point and the kVA capacity value pair. It performs character matching on the phase value in the character sequence and compares it with the preset phase number structure classification information to classify it into single-phase, two-phase or three-phase structure type. It extracts the rated current character sequence and converts it into ampere value to generate nameplate parameter structure vector group.

[0007] As a further aspect of the present invention, the channel selection module includes: The frequency point constraint screening submodule, based on the nameplate parameter structure vector group, calls the channel setting frequency point information set, performs frequency value comparison operation on the channel setting frequency point, sets the frequency tolerance range as the frequency matching benchmark value range, records the channel number of the successfully matched channel, and generates a frequency matching channel number list. The channel load difference calculation submodule calls the numbered load value in the frequency matching channel number list, uses the channel-by-channel capacity difference calculation instruction to calculate the amplitude difference between the capacity value and the channel load value, and sorts the difference in ascending order to obtain the capacity difference sorting result. The redundant channel filtering submodule calls the channel number sequence in the capacity difference sorting result, compares it with the frequency matching channel number list, uses the channel number intersection matching judgment method to compare and filter the number list, retains the number that exists in both lists as the filtered channel number, retains the first six numbers in the difference sorting order, and generates a set of restricted condition filtered channel numbers. The target channel submodule filters the channel number set according to the aforementioned constraints, establishes a channel attribute mapping based on the channel number structure, calls the channel set frequency information and load capacity value to compare and merge the numbers, and generates a target test channel set.

[0008] As a further aspect of the present invention, the path configuration module includes: The channel structure identification submodule calls the channel number in the target test channel set, combines the phase number classification results included in the nameplate parameter structure vector group, confirms the number of numbers according to the channel number configuration rules corresponding to the phase number type, obtains the corresponding value of the channel number in the physical layout distance and wiring interval list, sorts the confirmed number of channel numbers in ascending order, and generates a phase number constraint channel order list. The path order arrangement submodule calls the wiring interval value and physical layout distance value of the corresponding channel number according to the channel number order in the phase number constraint channel order list, constructs the offset length sequence according to the number index order and layout data, calculates the time series offset value in combination with the set path propagation relationship, and generates the channel path offset time series. The response cycle mapping submodule calls the channel path offset time series, performs matching calculations on each set of offset time values ​​and the response cycle of the corresponding channel number in the channel response cycle list, adjusts the channel number order structure, and generates the path order configuration result.

[0009] As a further aspect of the present invention, the process of confirming the number of channels according to the configuration rules of the number of phases is as follows: when the phase classification result is three-phase, the number of confirmed channel numbers is 3. When the phase number classification result is single phase, the number of confirmed channel numbers is 1; After the number of channel numbers is confirmed, when extracting the corresponding value of the channel number in the list of physical layout distance and wiring interval, the threshold ranges for the wiring interval and physical layout distance are set to be no greater than 10 mm and no greater than 100 mm, respectively, and the channel number is retained only when the threshold values ​​are met. The process of constructing the offset length sequence based on the number index order and layout data is as follows: starting with the minimum channel number as the starting index position, and following the ascending order of the numbers, the physical layout distance difference corresponding to each channel number is used as the input of the difference between adjacent elements in the offset length sequence. During the matching operation between each set of offset time values ​​and the corresponding channel number in the channel response period list, when the offset time value is greater than the upper limit of the response period of the corresponding channel number by 20%, the channel number order structure is adjusted so that the error of the corresponding channel response period is within ±10%.

[0010] As a further aspect of the present invention, the interference identification module includes: The excitation signal injection submodule calls the number marked as the excitation start channel in the path sequence configuration result, applies a pulse width excitation current signal with set parameters to the channel in the no-load state, records the start excitation timestamp, and marks the channel numbers that are adjacent in the path sequence as synchronous response channels, generating an excitation channel and response channel mapping set. The current response extraction submodule collects the current signal sequence in the response channel during the duration of the excitation signal according to the excitation channel and response channel mapping set, extracts the response current amplitude and response time point corresponding to the peak amplitude point, calculates the ratio of the current amplitude corresponding to the response channel to the amplitude of the excitation channel, and calculates the time difference in combination with the time interval between the excitation timestamp and the response time point, and generates a table of channel-to-current amplitude ratio and excitation time difference values. The interference level labeling submodule calls the current amplitude ratio of the channel pair and the amplitude ratio in the excitation time difference table, performs amplitude comparison calculation on the channel comparison value and the set inductor interference level standard ratio, filters the channel pair combination with the higher standard ratio, and marks the corresponding channel pair in the original path numbering structure to generate the test path interference identification map.

[0011] As a further aspect of the present invention, during the process of applying a pulse width excitation current signal with set parameters to the channel under no-load conditions, the set parameters are periodic pulse waveforms with a pulse width of not less than 100 microseconds and a current amplitude between 2 amperes and 5 amperes. The process of marking synchronous response channels for adjacent channel numbers arranged in the path sequence is as follows: when the difference between the physical layout distance value of adjacent channel numbers and the layout distance of the excitation starting channel does not exceed 30 mm, it is determined to be a synchronous response channel and included in the excitation channel and response channel mapping set; During the process of extracting the response current amplitude and response time point corresponding to the peak amplitude point by the current response extraction submodule, the judgment condition is that the local peak value in the response current signal sequence is more than twice the average value and the interval between the peak value and the rising edge is less than 50 microseconds. When the interference level labeling submodule calls the amplitude ratio in the table of current amplitude ratio and excitation time difference for the channel pair, the standard ratio of the inductor interference level is set to 0.3, and channel number labeling is performed only for channel pairs whose amplitude ratio is greater than the standard ratio.

[0012] As a further aspect of the present invention, the system further includes an excitation control module: The excitation control module, based on the channel pairs marked with high interference levels in the test path interference identification diagram, adjusts the corresponding excitation sequence to a discontinuous sequence, reads the grounding setting value of the corresponding channel, switches the original channel grounding state to partial shielding grounding, performs real-time detection on the frequency spacing value of the same group of channels, determines whether the frequency spacing is lower than the inductive overlap reference difference value, if it is, performs discrete adjustment on the frequency spacing, updates the excitation sequence table and grounding setting table, and generates a test channel excitation control list; The test channel excitation control list includes discontinuous excitation sequence, local grounding settings, and frequency discrete adjustment parameters.

[0013] As a further aspect of the present invention, the excitation control module includes: The excitation order adjustment submodule, based on the channel pairs marked with high interference levels in the test path interference identification map, extracts the position index of the channel number in the original excitation order, and redistributes adjacent channel pairs to non-contiguous positions in the excitation sequence using a skip number rearrangement method, constructs the rearranged channel number order structure, and generates an interference avoidance excitation order table. The grounding mode switching submodule calls the channel number in the interference avoidance excitation sequence table, reads the grounding setting value corresponding to the number, performs a grounding mode modification operation on the channels marked as general grounding state in the original settings, and uniformly updates them to local shielded grounding state, generating a shielded grounding setting table; The frequency spacing detection submodule calls the channel pair combination with the common number in the shielding grounding setting table, collects the excitation frequency value and calculates the frequency spacing between channels, compares the frequency difference between channels with the induced overlap reference difference, determines whether there is a frequency spacing lower than the reference difference, marks the channel pair that meets the condition, and generates a list of abnormal frequency spacing channel pairs. The control parameter update submodule performs a spacing increase operation on the frequency values ​​according to the channel number combination recorded in the list based on the frequency spacing abnormal channels, constructs an adjusted frequency distribution structure, and synchronously updates the excitation sequence and grounding status corresponding to the frequency distribution structure, generating a test channel excitation control list.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: The system extracts equipment nameplate information through image recognition to perform structured analysis of electrical parameters. It establishes parameter feature sets based on information such as frequency, capacity, number of phases, and current. It selects test channels based on the matching relationship between set frequency points and channel capabilities. It sets path sorting methods and maps response time parameters based on physical wiring characteristics and phase structure. It marks the interference level of channel combinations based on induced interference identification methods. It optimizes channel interference during the excitation process by adjusting the excitation sequence and grounding strategy. It performs discrete spacing control operation based on the real-time judgment results of frequency spacing. It achieves coordinated optimization of test path construction, interference control, and excitation sequence allocation, thereby improving the matching of parameter acquisition, the accuracy of path control, and the stability of channel excitation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of an intelligent power testing system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the system framework of the present invention; Figure 3 This is a flowchart of the nameplate parsing module in this invention; Figure 4 This is a flowchart of the channel selection module in this invention; Figure 5 This is a flowchart of the path configuration module in this invention; Figure 6 This is a flowchart of the interference identification module in this invention; Figure 7 This is a flowchart of the excitation control module in this invention. Detailed Implementation

[0017] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0018] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0019] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning.

[0020] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0021] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] This invention provides an intelligent testing system for power testing, such as... Figure 1-2 The diagram shown illustrates an intelligent testing system for power generation. This system includes: The nameplate parsing module obtains the image content of the power equipment nameplate, extracts the frequency field and matches it with the power frequency standard frequency point table to complete the frequency feature positioning, extracts the capacity field content and converts it into a unified kVA value, extracts the phase number segment content and classifies it into single-phase, two-phase or three-phase structure, extracts the rated current field and converts it into an ampere value, and generates a nameplate parameter structure vector group. The channel selection module matches the frequency point information of the channel set in the power test according to the nameplate parameter structure vector group, extracts the frequency matching channel number, sorts the capacity value with the difference in the execution amplitude in the channel load capacity list according to the capacity value, filters the channel number with similar load capacity difference amplitude, uses the frequency matching result as a constraint, selects the number with similar load capacity as a redundant path, and generates the target test channel set. The path configuration module calls the target test channel set, and confirms the number of channels required for the test based on the physical layout distance corresponding to the channel number and the list of wiring intervals between channels, combined with the phase number classification. It extracts the corresponding number of channels from the selected channels, sets the order offset time value of the path order list after numbering according to the wiring distance, compares and maps the offset time value with the channel response cycle list, and generates the path order configuration result. The interference identification module uses the number marked as the excitation start channel in the path sequence configuration result, applies a fixed pulse width excitation current signal under no-load conditions, and collects the amplitude of the induced current response signal of adjacent numbered channels. It extracts the current amplitude ratio and excitation time difference between the excitation channel and the adjacent channel, and marks the channel combination with the amplitude ratio higher than the standard ratio of inductive interference level to generate an interference identification map of the test path. The excitation control module, based on the channel pairs marked with high interference levels in the test path interference identification diagram, adjusts the corresponding excitation sequence to a discontinuous sequence, reads the grounding setting value of the corresponding channel, switches the original channel grounding state to partial shielding grounding, and performs real-time detection on the frequency spacing value of the same group of channels to determine whether the frequency spacing is lower than the inductive overlap reference difference value. If it is, it performs discrete adjustment on the frequency spacing, updates the excitation sequence table and grounding setting table, and generates a test channel excitation control list. The nameplate parameter structure vector group includes frequency characteristic category, capacity value standard, phase number structure classification, and rated current ampere value. The target test channel set includes frequency matching channel number, load capacity proximity number, and redundant path number. The path sequence configuration result includes wiring sequence list, time offset value, and channel response mapping relationship. The test path interference identification diagram includes current amplitude ratio label, excitation time difference mark, and interference level combination. The test channel excitation control list includes discontinuous excitation sequence, local grounding setting, and frequency discrete adjustment parameters.

[0023] Specifically, such as Figure 2 , 3As shown, the nameplate parsing module includes: The image data extraction submodule acquires the image content of the nameplate of the power equipment, scans the image area frame by frame and removes blurry images, extracts the text area image using the text area detection instruction, divides the independent field area by combining the character connectivity judgment instruction, and compares the spatial position of the four types of label text (frequency, capacity, number of phases, and current) with the corresponding value pairs according to the character arrangement position in the field area to generate the field image mapping result. Frame-by-frame image scanning can be achieved using continuous image sequences acquired by a high-speed industrial camera. Each frame is loaded into a cache and filtered using image sharpness evaluation criteria. Image sharpness is used to identify whether an image is blurry. The image is assessed for clear character edges, obvious motion blur, or focus deviation. If a frame is not identifiable, it is marked as invalid and discarded. Valid images proceed to the text region extraction process. Deep learning text detection models, such as text localization networks based on convolutional neural networks, can be used to detect regions containing text. After detecting bounding boxes containing text, image patches are extracted. Character connectivity methods, such as analyzing the connection relationships between characters based on pixel connectivity, are then used to determine if they belong to the same field region. Characters with a certain spacing pattern in their spatial arrangement are classified into the same field. A field pair is formed by setting a "frequency" and the corresponding value "50Hz" if the characters are adjacent and do not interfere with the remaining characters. The spatial coordinates of the field pair in the image are recorded. The labels and values ​​are matched based on their relative positions in the image to generate a field image mapping result.

[0024] The field feature processing submodule segments the character boundary region based on the field image mapping result, obtains the character structure encoding, maps it to the corresponding digital symbol sequence, performs frequency point matching by comparing the extracted frequency value with the standard frequency point interval table, calls the image region marked as the capacity field to perform the same operation, extracts the capacity value and converts it into a uniform kVA value, and obtains the power frequency standard matching point and kVA capacity value pair. Character segmentation operations need to be performed on each field area in the image. The character spacing judgment method or the vertical projection segmentation method is used for character positioning. When the field content is a character combination such as "50Hz" or "400kVA" with close arrangement, the system will first identify the character edge or the position of pixel density change, and cut it into single character tiles according to the vertical segmentation line. Then, character encoding conversion is performed on the tiles. This step can extract the character structure encoding based on the geometric features of the character image, set features such as the character width-to-height ratio, the number and direction of strokes, and match the encoding with the preset character dictionary. Gradually generate the corresponding digital or symbol sequence. The recognized character value will be used to judge the type of the field. For example, "50Hz" is recognized as a frequency field, and it is judged whether it is within the effective power frequency range by comparing with the standard list of frequency intervals. If it is recognized as "400kVA", it needs to be uniformly converted to the kilovolt-ampere unit. When non-standard units such as "400kW" or "0.4MW" are recognized, the system will automatically complete the unit conversion to ensure that the capacity field is output in the kilovolt-ampere unit format, and obtain the power frequency standard matching point and the kilovolt-ampere capacity value pair.

[0025] According to the power frequency standard matching point and the kilovolt-ampere capacity value pair, the structure status recognition sub-module calls the image areas marked as phase number fields and rated current fields, performs character matching on the phase number values in the character sequence, and compares with the preset phase number structure classification information, and divides them into single-phase, two-phase or three-phase structure types. Extract the rated current character sequence and uniformly convert it to the ampere value to generate the nameplate parameter structure vector group; It is necessary to process the image areas of the phase number field and the rated current field. The operation process is the same as the previous character recognition method. Perform character edge detection on the phase number field image, and perform structure feature encoding and dictionary matching on the segmented characters. Set that when the recognized character is "three", it is matched as the number 3, and it is classified as a three-phase structure according to the set classification standard; if the recognition result is "1", it is divided into a single-phase structure. The structure classification needs to be set according to the general marking rules of the equipment nameplate. When recognizing the rated current field, when different formats such as "25A" or "0.025kA" are extracted during the character recognition process, the system will uniformly convert the unit and extract the unified ampere value for parameter classification. The above recognized field data will be combined into the nameplate parameter structure vector group.

[0026] Specifically, as Figure 2 、 4 shown, the channel preference module includes: Based on the nameplate parameter structure vector group, the frequency point constraint screening sub-module calls the channel setting frequency point information set, performs a frequency value comparison operation on the channel setting frequency points, sets the frequency tolerance interval as the frequency matching reference value interval, records the channel numbers that match successfully, and generates a frequency matching channel number list; Based on the frequency value field extracted from the device, set "50Hz" or "60Hz", call the preset channel setting frequency point information set. The information set includes multiple channel numbers and corresponding frequency values. Set channel 01 to 49.8Hz, channel 02 to 50.1Hz, channel 03 to 60.2Hz, etc. Set the frequency tolerance range as the comparison benchmark range. If the tolerance is set to ±0.3Hz, then the matching range for the frequency value of 50Hz is 49.7Hz to 50.3Hz. The system compares the set channel frequencies one by one to determine whether they fall within the tolerance range. If the condition is met, the channel number is recorded as the successfully matched channel number. Set channels 01 and 02 to fall within the tolerance range, and channel 03 to exceed the upper limit and not counted. Generate a frequency matching channel number list.

[0027] The channel load difference calculation submodule calls the number load value in the channel number list of frequency matching channel number, uses the channel-by-channel capacity difference calculation instruction to calculate the magnitude difference between the capacity value and the channel load value, and sorts the difference in ascending order to obtain the capacity difference sorting result. Extract the real-time load value of each matching channel, which can be obtained from online monitoring equipment or a recorded parameter library. Set the current load of channel 01 to 380kVA and channel 02 to 420kVA. Compare the difference between the load value of each channel and the capacity field value in the equipment nameplate. Set the capacity marked on the nameplate to 400kVA. Then the difference for channel 01 is |380-400|=20kVA, and the difference for channel 02 is |420-400|=20kVA. Perform the same operation on the matching channels in sequence and calculate the capacity difference. The capacity difference results are recorded in an array. Perform an ascending sort operation on the array to arrange the capacity differences from smallest to largest. Record the corresponding channel number order during the sorting process. Set the sorting by difference to channel 05 (10kVA), channel 01 (20kVA), channel 02 (20kVA), channel 06 (30kVA), etc., to obtain the capacity difference sorting results.

[0028] The redundant channel filtering submodule calls the channel number sequence in the capacity difference sorting result, compares it with the frequency matching channel number list, uses the channel number intersection matching judgment method to compare and filter the number list, retains the number that exists in both lists as the filtered channel number, retains the first six numbers in the difference sorting order, and generates a set of channel number filtering with constraints. The system performs a filtering operation by analyzing the intersection between the capacity difference sorting results and the frequency matching channel number list. It extracts the channel number sequence from the capacity difference sorting results, compares the sequence with the frequency matching channel number list, and uses a channel number intersection judgment method. Only channel numbers that exist in both lists are retained as initial filtering channel numbers. For example, if the frequency matching channel is [01, 02, 05, 06] and the capacity sorting result number is [05, 07, 02, 01, 09], then the intersection number is [05, 02, 01]. At this point, the first six channel numbers are retained according to the original capacity difference sorting order. If there are fewer than six, the existing number is output, retaining [05, 02, 01] as the filtering channel number, thus generating a set of channel numbers for filtering based on constraints.

[0029] The target channel submodule filters the channel number set according to the constraints, establishes a channel attribute mapping according to the channel number structure, calls the channel set frequency point information and load capacity value to compare and merge the numbers, and generates the target test channel set. The system performs structured analysis on each channel number in the numbering set, constructing a channel attribute mapping table based on the numbering format, segmentation rules, or hierarchical identifier. For example, the channel number "CH-05-A" can be broken down into a main number "05" and a segment identifier "A". The system identifies the channel's physical group, location segment, or wiring category. For each channel number, the system extracts a set frequency value from the established channel frequency information database (e.g., CH-05-A has a set frequency of 49.8Hz). Simultaneously, it reads the corresponding load capacity value from the equipment file or operating parameters (e.g., a rated load capacity of 400kVA). The system performs field-level comparison and merging of the channel number, frequency value, and load capacity value, forming a structured comparison row: channel number → [frequency, load]. This same operation is performed on each number sequentially. Each channel includes a structural attribute identifier, frequency setting parameters, and load capacity indicators, providing a data foundation for processes such as excitation configuration, path sequencing, and interference detection, and generating a target test channel set.

[0030] Specifically, such as Figure 2 , 5 As shown, the path configuration module includes: The channel structure identification submodule calls the channel number in the target test channel set, combines the phase number classification results included in the nameplate parameter structure vector group, confirms the number of channels according to the channel number configuration rules corresponding to the phase number type, obtains the corresponding value of the channel number in the physical layout distance and wiring interval list, sorts the confirmed number of channel numbers in ascending order, and generates a phase number constraint channel order list. The system retrieves the channel number information from the target test channel set and reads the associated nameplate parameter structure vector group, paying particular attention to the phase number classification result. The classification result indicates whether the equipment is a single-phase, two-phase, or three-phase power structure. The system confirms the number of channel numbers according to the set channel number configuration rules. It is set that three-phase structures need to be configured with 3 channel numbers and single-phase structures need to be configured with 1 channel number. If the target channel set includes channel numbers [03, 07, 12, 14] and the nameplate phase number is identified as a three-phase structure, the system will select any three channel numbers to continue the subsequent process. After selecting the channel numbers, the system queries the corresponding layout distance and wiring interval values ​​in the channel physical layout information database. The distance of channel 03 is set to 1.5m and the interval to 0.2m, the distance of channel 07 is set to 1.7m and the interval to 0.25m, and the interval of channel 12 is set to 1.6m and the interval to 0.22m. After extraction, the system rearranges the channel sequence according to the ascending order of the numbers. In this example, it is adjusted to [03, 07, 12] to generate a phase number constraint channel sequence list.

[0031] The path order arrangement submodule calls the wiring interval value and physical layout distance value of the corresponding channel number according to the channel number order in the phase number constraint channel order list, constructs the offset length sequence based on the number index order and layout data, calculates the time series offset value in combination with the set path propagation relationship, and generates the channel path offset time series. For each channel number, the corresponding cabling interval value and physical layout distance value are called. The system constructs the corresponding cabling offset length sequence according to the index order of the numbers. The numbering order is set as [03, 07, 12], the physical layout distances are 1.5m, 1.7m, and 1.6m respectively, and the cabling intervals are 0.2m, 0.25m, and 0.22m respectively. The system will arrange and combine them into a cabling path offset structure according to the order of the numbers. The propagation time is calculated according to the set path propagation relationship. The propagation relationship is set based on the propagation delay per meter. The propagation delay of the cabling cable is set to 5ns / m. Then the time offset generated by the offset path is distance multiplied by the propagation delay. The offset of channel 03 is set to 1.5m×5ns=7.5ns, channel 07 is 8.5ns, and channel 12 is 8.0ns. The channel path offset time sequence is generated.

[0032] The response cycle mapping submodule calls the channel path offset time series, performs matching calculations between each set of offset time values ​​and the response cycle of the corresponding channel number in the channel response cycle list, adjusts the channel number order structure, and generates the path order configuration result. Each offset time value is matched one by one with the corresponding channel number in the channel response period list. The response period represents the period value of each channel in the signal response test. The response period of channel 03 is set to 100ns, channel 07 to 102ns, and channel 12 to 101ns. The system performs offset value matching calculation, calculates the offset time value and response period to determine whether there is a deviation exceeding the limit. If the period is inconsistent after offset, the channel number structure is adjusted in order. If the channel changes less in the response period sorting, it is prioritized and the channel with greater change is deferred. In this way, the number order is optimized and matched to generate the path order configuration result.

[0033] Specifically, such as Figure 2 , 6 As shown, the interference identification module includes: The excitation signal injection submodule calls the path sequence configuration result and marks the number of the excitation start channel. In the no-load state, the pulse width excitation current signal with the set parameters is applied to the channel, the start excitation timestamp is recorded, and the channel numbers that are adjacent in the path sequence are marked as synchronous response channels to generate a set of excitation channels and response channels. The system identifies the channel number marked as the excitation start channel and sets channel number 03 as the start excitation channel. When the channel is in an unloaded state, the system injects a pulse width excitation current signal with set parameters. The applied excitation signal has a clear current amplitude, duration and pulse shape, such as a single-cycle excitation current with a pulse width of 20 microseconds and an amplitude of 10 amperes. At the same time as applying the excitation, the system records the start timestamp of the current signal, set to T0. At this time, the channel numbers adjacent to the start channel in the path sequence are simultaneously marked in response. If the path sequence is set to [03, 07, 12], then 07 and 12 after 03 are marked as response channels, generating a mapping set of excitation channels and response channels.

[0034] The current response extraction submodule collects the current signal sequence in the response channel during the duration of the excitation signal based on the mapping set of excitation channel and response channel. It extracts the response current amplitude and response time point corresponding to the peak amplitude point, calculates the ratio of the current amplitude corresponding to the response channel to the amplitude of the excitation channel, and calculates the time difference by combining the time interval between the excitation timestamp and the response time point, and generates a table of channel-to-current amplitude ratio and excitation time difference values. The system acquires the current signal of the response channel in real time during the duration of the excitation signal. The sampling process begins at the initial excitation timestamp T0, and a complete current response waveform is acquired for each response channel. Channels 07 and 12 are set to acquire instantaneous waveforms. The system uses a peak detection method to extract the maximum current value as the amplitude point in each current sequence, and records the corresponding time of the amplitude point. For example, channel 07 has an A value of 8.2A and a response time of T1 = 23 microseconds. Channel 1... For example, with a current of 7.6A and T2=25 microseconds, the system calculates the ratio of the current amplitude of the response channel to the current amplitude of the excitation channel. Under a 10A excitation current, the amplitude ratio of channel 07 is set to 0.82, and that of channel 12 is 0.76. At the same time, the time interval between the excitation timestamp T0 and each response time point T1 and T2 is calculated to form a time difference value, such as T1-T0=23μs, T2-T0=25μs. The ratio and time difference of each channel pair are recorded in a table to generate a table of channel pair current amplitude ratio and excitation time difference value.

[0035] The interference level labeling submodule calls the channel pair current amplitude ratio and the amplitude ratio in the excitation time difference table, performs amplitude comparison calculation on the channel comparison value and the set inductor interference level standard ratio, filters the channel pair combination with the higher standard ratio, and marks the corresponding channel pair in the original path numbering structure to generate the test path interference identification map. An amplitude comparison operation is performed on the amplitude ratio of each pair of channels. The system is then screened and judged according to the pre-set inductive interference level standard. The set ratio standard is 0.7. The system judges whether the ratio of each channel pair is higher than the standard. If it is higher, it is judged as a channel pair combination with significant interference response. For example, if the ratio of channel pair [03→07] is 0.82, which is higher than the standard, it is included in the screening result set. Then, the system marks the channel pairs that meet the screening conditions in the original path sequence numbering structure. The system sets the symbol "★" or color code in the numbering table to indicate that the channel pair has interference characteristics, and generates a test path interference identification map.

[0036] Specifically, such as Figure 2 , 7 As shown, the incentive control module includes: The excitation order adjustment submodule is based on the channel pairs marked with high interference levels in the test path interference identification map. It extracts the position index of the channel number in the original excitation order, and uses a skip number rearrangement method to redistribute adjacent channel pairs to non-contiguous positions in the excitation sequence. It then constructs the rearranged channel number order structure and generates an interference avoidance excitation order table. The system extracts the position of each pair of numbers in the original excitation sequence to form a corresponding number position index list. The channel pairs [03→07] and [07→12] are set as the 1st and 2nd pairs in the original sequence. The system adopts a skip number rearrangement strategy to redistribute the channels, that is, to scatter the originally adjacent interference channel pairs to non-adjacent positions in the excitation sequence. For example, 03, 07, and 12 are arranged to the 1st, 4th, and 6th positions, respectively. The rearranged order ensures that the high interference channels no longer interfere with each other, while satisfying the integrity of the path structure. During the rearrangement process, the system keeps the starting and ending number boundaries of the path unchanged to avoid path breakage and generates an interference avoidance excitation sequence table.

[0037] The grounding mode switching submodule calls the channel number in the interference avoidance excitation sequence table, reads the grounding setting value corresponding to the number, performs grounding mode modification operation on the channels marked as general grounding state in the original settings, and uniformly updates them to local shielded grounding state, generating a shielded grounding setting table; The system reads the grounding setting value corresponding to the number in the hardware configuration library. If the channel is currently in "general grounding" state, it automatically calls the grounding control command to perform a grounding mode switching operation, replacing the original general grounding mode with "local shielded grounding". While maintaining the electrical continuity of the channel, the operation adjusts the shielding connection mode through hardware configuration instructions to reduce the interference coupling between the signal path and the ground wire. The channel that has completed the grounding mode switching will be written into the updated configuration record, generating a shielded grounding setting table.

[0038] The frequency spacing detection submodule calls the channel pair combination with the common number in the shielding grounding setting table, collects the excitation frequency value and calculates the frequency spacing between channels, compares the frequency difference between channels with the induced overlap reference difference, determines whether there is a frequency spacing below the reference difference, marks the channel pair that meets the condition, and generates a list of abnormal frequency spacing channel pairs. For each channel pair, the current excitation frequency value is collected, and the frequency spacing between channels is calculated. The system reads the numbered combinations one by one. Channels 05 and 08 are set with excitation frequencies of 49.9Hz and 50.1Hz, respectively. The frequency spacing is 0.2Hz. The spacing is compared with the set induction overlap reference difference. If the reference difference is set to 0.3Hz, and the current channel difference is lower than the threshold, it is considered an abnormal frequency spacing situation. The system records the channel pair number in the abnormal mark list, records the channel pair combinations that meet the conditions, and generates a list of abnormal frequency spacing channel pairs.

[0039] The control parameter update submodule performs a spacing increase operation on the frequency values ​​according to the channel number combination recorded in the list based on the abnormal frequency spacing channels, constructs the adjusted frequency distribution structure, and synchronously updates the excitation sequence and grounding status corresponding to the frequency distribution structure, generating a test channel excitation control list. The frequency values ​​of each channel in the list are adjusted. The system performs a spacing increase operation, reallocating frequency values ​​for each pair of channels until the difference reaches a set threshold. The settings are adjusted from 49.9Hz and 50.1Hz to 49.6Hz and 50.2Hz respectively, increasing the difference to 0.6Hz to avoid overlapping induction. The system synchronously updates the frequency distribution structure and maps the frequency adjustment results back to the excitation sequence and grounding status configuration to form a new comprehensive control configuration. The frequency value, excitation sequence position, and grounding status of each channel are uniformly listed in this list, generating the test channel excitation control list.

[0040] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An intelligent testing system for power testing, characterized in that, The system includes: The nameplate parsing module acquires the image content of the power equipment nameplate, extracts the frequency field and matches it with the power frequency standard frequency point table to complete the frequency feature positioning, extracts the capacity field content and converts it into a unified kVA value, extracts the phase number segment content and performs single-phase, two-phase or three-phase structure classification, and generates a nameplate parameter structure vector group. The channel selection module matches the frequency point information of the channel in the power test with the nameplate parameter structure vector group, extracts the frequency matching channel number, sorts the capacity values ​​with the difference in the execution amplitude in the channel load capacity list according to the capacity value, and generates a target test channel set. The path configuration module calls the target test channel set, and based on the physical layout distance corresponding to the channel number and the list of wiring intervals between channels, combined with the phase number classification, confirms the number of channels required for the test and generates the path sequence configuration result. The interference identification module uses the number marked as the excitation start channel in the path sequence configuration result, applies a fixed pulse width excitation current signal in the no-load state, and collects the amplitude of the induced current response signal of the adjacent numbered channels to generate an interference identification map of the test path.

2. The intelligent testing system for power testing according to claim 1, characterized in that: The nameplate parameter structure vector group includes frequency characteristic category, capacity value standard, phase number structure classification, and rated current ampere value. The target test channel set includes frequency matching channel number, load capacity proximity number, and redundant path number. The path sequence configuration result includes wiring sequence list, time offset value, and channel response mapping relationship. The test path interference identification diagram includes current amplitude ratio label, excitation time difference mark, and interference level combination.

3. The intelligent testing system for power testing according to claim 1, characterized in that: The nameplate parsing module includes: The image data extraction submodule acquires the image content of the nameplate of the power equipment, scans the image area frame by frame and removes blurry images, extracts the text area image using the text area detection instruction, divides the independent field area by combining the character connectivity judgment instruction, and compares the spatial position of the four types of label text (frequency, capacity, number of phases, and current) with the corresponding value pairs according to the character arrangement position in the field area to generate the field image mapping result. Based on the field image mapping result, the field feature processing submodule segments the character boundary region, obtains the character structure encoding, maps it to the corresponding digital symbol sequence, performs frequency point matching by comparing the extracted frequency value with the standard frequency point interval table, calls the image region marked as the capacity field to perform the same operation, extracts the capacity value and converts it into a unified kVA value, and obtains the power frequency standard matching point and kVA capacity value pair. The structural state recognition submodule calls the image area marked as phase number segment and rated current field according to the power frequency standard matching point and the kVA capacity value pair. It performs character matching on the phase value in the character sequence and compares it with the preset phase number structure classification information to classify it into single-phase, two-phase or three-phase structure type. It extracts the rated current character sequence and converts it into ampere value to generate nameplate parameter structure vector group.

4. The intelligent testing system for power testing according to claim 3, characterized in that: The channel selection module includes: The frequency point constraint screening submodule, based on the nameplate parameter structure vector group, calls the channel setting frequency point information set, performs frequency value comparison operation on the channel setting frequency point, sets the frequency tolerance range as the frequency matching benchmark value range, records the channel number of the successfully matched channel, and generates a frequency matching channel number list. The channel load difference calculation submodule calls the numbered load value in the frequency matching channel number list, uses the channel-by-channel capacity difference calculation instruction to calculate the amplitude difference between the capacity value and the channel load value, and sorts the difference in ascending order to obtain the capacity difference sorting result. The redundant channel filtering submodule calls the channel number sequence in the capacity difference sorting result, compares it with the frequency matching channel number list, uses the channel number intersection matching judgment method to compare and filter the number list, retains the number that exists in both lists as the filtered channel number, retains the first six numbers in the difference sorting order, and generates a set of restricted condition filtered channel numbers. The target channel submodule filters the channel number set according to the aforementioned constraints, establishes a channel attribute mapping based on the channel number structure, calls the channel set frequency information and load capacity value to compare and merge the numbers, and generates a target test channel set.

5. The intelligent testing system for power testing according to claim 4, characterized in that: The path configuration module includes: The channel structure identification submodule calls the channel number in the target test channel set, combines the phase number classification results included in the nameplate parameter structure vector group, confirms the number of numbers according to the channel number configuration rules corresponding to the phase number type, obtains the corresponding value of the channel number in the physical layout distance and wiring interval list, sorts the confirmed number of channel numbers in ascending order, and generates a phase number constraint channel order list. The path order arrangement submodule calls the wiring interval value and physical layout distance value of the corresponding channel number according to the channel number order in the phase number constraint channel order list, constructs the offset length sequence according to the number index order and layout data, calculates the time series offset value in combination with the set path propagation relationship, and generates the channel path offset time series. The response cycle mapping submodule calls the channel path offset time series, performs matching calculations on each set of offset time values ​​and the response cycle of the corresponding channel number in the channel response cycle list, adjusts the channel number order structure, and generates the path order configuration result.

6. The intelligent testing system for power testing according to claim 5, characterized in that: The process of confirming the number of channels according to the configuration rules of the number of phases is as follows: when the phase classification result is three-phase, the number of confirmed channel numbers is 3. When the phase number classification result is single phase, the number of confirmed channel numbers is 1; After the number of channel numbers is confirmed, when extracting the corresponding value of the channel number in the list of physical layout distance and wiring interval, the threshold ranges for the wiring interval and physical layout distance are set to be no greater than 10 mm and no greater than 100 mm, respectively, and the channel number is retained only when the threshold values ​​are met. The process of constructing the offset length sequence based on the number index order and layout data is as follows: starting with the minimum channel number as the starting index position, and following the ascending order of the numbers, the physical layout distance difference corresponding to each channel number is used as the input of the difference between adjacent elements in the offset length sequence. During the matching operation between each set of offset time values ​​and the corresponding channel number in the channel response period list, when the offset time value is greater than the upper limit of the response period of the corresponding channel number by 20%, the channel number order structure is adjusted so that the error of the corresponding channel response period is within ±10%.

7. The intelligent testing system for power testing according to claim 5, characterized in that: The interference identification module includes: The excitation signal injection submodule calls the number marked as the excitation start channel in the path sequence configuration result, applies a pulse width excitation current signal with set parameters to the channel in the no-load state, records the start excitation timestamp, and marks the channel numbers that are adjacent in the path sequence as synchronous response channels, generating an excitation channel and response channel mapping set. The current response extraction submodule collects the current signal sequence in the response channel during the duration of the excitation signal according to the excitation channel and response channel mapping set, extracts the response current amplitude and response time point corresponding to the peak amplitude point, calculates the ratio of the current amplitude corresponding to the response channel to the amplitude of the excitation channel, and calculates the time difference in combination with the time interval between the excitation timestamp and the response time point, and generates a table of channel-to-current amplitude ratio and excitation time difference values. The interference level labeling submodule calls the current amplitude ratio of the channel pair and the amplitude ratio in the excitation time difference table, performs amplitude comparison calculation on the channel comparison value and the set inductor interference level standard ratio, filters the channel pair combination with the higher standard ratio, and marks the corresponding channel pair in the original path numbering structure to generate the test path interference identification map.

8. The intelligent testing system for power testing according to claim 7, characterized in that: During the process of applying a pulse width excitation current signal with set parameters to the channel under no-load conditions, the set parameters are periodic pulse waveforms with a pulse width of not less than 100 microseconds and a current amplitude between 2 amperes and 5 amperes. The process of marking synchronous response channels for adjacent channel numbers arranged in the path sequence is as follows: when the difference between the physical layout distance value of adjacent channel numbers and the layout distance of the excitation starting channel does not exceed 30 mm, it is determined to be a synchronous response channel and included in the excitation channel and response channel mapping set; During the process of extracting the response current amplitude and response time point corresponding to the peak amplitude point by the current response extraction submodule, the judgment condition is that the local peak value in the response current signal sequence is more than twice the average value and the interval between the peak value and the rising edge is less than 50 microseconds. When the interference level labeling submodule calls the amplitude ratio in the table of current amplitude ratio and excitation time difference for the channel pair, the standard ratio of the inductor interference level is set to 0.3, and channel number labeling is performed only for channel pairs whose amplitude ratio is greater than the standard ratio.

9. The intelligent testing system for power testing according to claim 1, characterized in that: The system also includes an incentive control module: The excitation control module, based on the channel pairs marked with high interference levels in the test path interference identification diagram, adjusts the corresponding excitation sequence to a discontinuous sequence, reads the grounding setting value of the corresponding channel, switches the original channel grounding state to partial shielding grounding, performs real-time detection on the frequency spacing value of the same group of channels, determines whether the frequency spacing is lower than the inductive overlap reference difference value, if it is, performs discrete adjustment on the frequency spacing, updates the excitation sequence table and grounding setting table, and generates a test channel excitation control list; The test channel excitation control list includes discontinuous excitation sequence, local grounding settings, and frequency discrete adjustment parameters.

10. The intelligent testing system for power testing according to claim 9, characterized in that: The incentive control module includes: The excitation order adjustment submodule, based on the channel pairs marked with high interference levels in the test path interference identification map, extracts the position index of the channel number in the original excitation order, and redistributes adjacent channel pairs to non-contiguous positions in the excitation sequence using a skip number rearrangement method, constructs the rearranged channel number order structure, and generates an interference avoidance excitation order table. The grounding mode switching submodule calls the channel number in the interference avoidance excitation sequence table, reads the grounding setting value corresponding to the number, performs a grounding mode modification operation on the channels marked as general grounding state in the original settings, and uniformly updates them to local shielded grounding state, generating a shielded grounding setting table; The frequency spacing detection submodule calls the channel pair combination with the common number in the shielding grounding setting table, collects the excitation frequency value and calculates the frequency spacing between channels, compares the frequency difference between channels with the induced overlap reference difference, determines whether there is a frequency spacing lower than the reference difference, marks the channel pair that meets the condition, and generates a list of abnormal frequency spacing channel pairs. The control parameter update submodule performs a spacing increase operation on the frequency values ​​according to the channel number combination recorded in the list based on the frequency spacing abnormal channels, constructs an adjusted frequency distribution structure, and synchronously updates the excitation sequence and grounding status corresponding to the frequency distribution structure, generating a test channel excitation control list.

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