Load test method, device, storage medium and computer equipment

Abstract

The application provides a kind of on-load test method, device, storage medium and computer equipment, in on-load test, first remote acquisition protection device's analog quantity information and device parameters, and test interval's one time flow data;Then based on analog quantity information, vector hexagon diagram is drawn to clearly show the phase relationship and amplitude size of current, voltage and other electrical quantities and parameters such as protection device acquisition.Especially, according to the preset test logic, the protection device is detected by using the obtained data;Here the preset test logic is a systematic detection process formed by a plurality of test items according to priority, so the protection device can be fully and deeply detected automatically.Finally, the detection result and vector hexagon diagram are packaged as on-load test report for subsequent analysis, evaluation and traceability, and when there is an abnormal result in the report, the system alarm is triggered to enable relevant personnel to handle potential faults of protection device in time.

Description

Technical Field

[0001] This application relates to the field of equipment testing technology, and in particular to a load testing method, apparatus, storage medium, and computer equipment. Background Technology

[0002] In the operation and maintenance of power systems, load testing of equipment is a crucial step in ensuring the safe and stable operation of the power grid. With the advancement of power technology, the emergence of power phasor measurement instruments has brought revolutionary changes to load testing. These instruments can accurately connect to the test circuit, measuring and recording the amplitude and phase information of current and voltage in real time, providing a rich data foundation for subsequent analysis.

[0003] However, the load testing method based on power phasor meters still has many shortcomings. On the one hand, the on-site testing environment is complex, requiring personnel to operate at close range, posing a high risk of electric shock. On the other hand, the testing process relies on manual recording and analysis, which is inefficient and prone to errors, and manual analysis may miss key issues. In short, traditional load testing methods are difficult to implement, thus reducing overall work efficiency and increasing operation and maintenance costs. Summary of the Invention

[0004] The purpose of this application is to at least address one of the aforementioned technical deficiencies, particularly the technical deficiency that the existing load testing methods are difficult to implement, thereby reducing overall work efficiency and increasing operation and maintenance costs.

[0005] This application provides a method for load testing, the method comprising:

[0006] Acquire power flow data of the protection device during the test interval when it is running under load, and acquire analog quantity information and device parameters of the protection device;

[0007] Based on the analog quantity information, a vector hexagonal diagram of the protection device is drawn, and the primary current and voltage values ​​of the protection device are determined based on the analog quantity information and the device parameters.

[0008] According to the preset test logic, the protection device is tested step by step using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values ​​to obtain the test results; wherein, the preset test logic includes multiple test items ordered by priority.

[0009] The detection results and the vector hexagon diagram are encapsulated to form a load test report, and a system alarm is triggered when there are abnormal results in the load test report.

[0010] Optionally, acquiring the power flow data of the protection device during the test interval under load includes:

[0011] A communication interface is established between the main network scheduling automated monitoring and operation system and the protection information system, so that the protection information system can obtain the power flow data of the protection device during the test interval when it is under load from the automated monitoring and operation system through the communication interface.

[0012] Optionally, the step of drawing the vector hexagonal diagram of the protection device based on the analog quantity information includes:

[0013] The three-phase current and voltage information and differential current information of the protection device are identified from the analog quantity information;

[0014] The phase relationship between current and voltage in the protection device is determined based on the three-phase current and voltage information and the differential current information.

[0015] Using CANVAS image processing technology, a vector hexagonal diagram of the protection device is drawn based on the phase relationship.

[0016] Optionally, the primary current and voltage values ​​include a primary current value and a primary voltage value;

[0017] Determining the primary current and voltage values ​​of the protection device based on the analog quantity information and the device parameters includes:

[0018] Read the current transformer ratio and voltage transformer ratio of the protection device from the device parameters, and extract the secondary current value and secondary voltage value from the analog quantity information;

[0019] The primary current value of the protection device is determined based on the current transformer ratio and the secondary current value, and the primary voltage value of the protection device is determined based on the voltage transformer ratio and the secondary voltage value.

[0020] Optionally, the step of performing step-by-step testing on the protection device according to a preset test logic, using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values, to obtain the test results includes:

[0021] The test data for each test item in the preset test logic is extracted from the primary power flow data, the vector hexagon diagram, and the primary current and voltage values.

[0022] The highest priority is determined by sorting the undetected test items by priority, and anomaly detection is performed on the test data of the test items corresponding to the highest priority to obtain the detection results;

[0023] If the test result is normal, return the highest priority of the test items that were determined not to be tested and their subsequent steps until the test items are tested and the test result is generated;

[0024] If the test result is abnormal, the load test of the protection device is stopped and the test result is generated.

[0025] Optionally, the priority ordering of test items in the preset test logic includes:

[0026] Determine whether the phase angles of the three current transformers in the same group of the protection device are arranged in a positive sequence of 120°.

[0027] Determine whether the protection device has differential current;

[0028] Determine whether the primary current value and current transformer ratio of the protection device are consistent with the equipment settings.

[0029] Determine whether the positive and negative values ​​of the active power and reactive power of the protection device are correct;

[0030] Determine whether the polarity of the current transformer in the bus differential group of the protection device is consistent with that of the corresponding interval protection.

[0031] Optionally, the method further includes:

[0032] Before drawing the vector hexagon diagram, determine whether the analog quantity information and the device parameters are complete;

[0033] If complete, then determine whether the protection device meets the conditions for load testing based on the analog quantity information and the device parameters; the conditions for load testing include three current-carrying currents and the three currents of the same group of current transformers being balanced.

[0034] If the analog quantity information and / or the device parameters are incomplete, or if the protection device does not meet the conditions for load testing, then load testing will not be performed.

[0035] This application also provides a load testing device, including:

[0036] The data acquisition module is used to acquire power flow data of the protection device during the test interval when it is running under load, as well as to acquire analog quantity information and device parameters of the protection device.

[0037] The hexagonal diagram drawing module is used to draw a vector hexagonal diagram of the protection device based on the analog quantity information, and to determine the primary current and voltage values ​​of the protection device based on the analog quantity information and device parameters;

[0038] The load testing module is used to perform step-by-step testing on the protection device according to the preset test logic, using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values, to obtain the test results; wherein, the preset test logic includes multiple test items ordered by priority.

[0039] The report generation module is used to encapsulate the detection results and the vector hexagonal diagram to form a load test report, and to trigger a system alarm when there are abnormal results in the load test report.

[0040] This application also provides a storage medium storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the load testing method as described in any of the above embodiments.

[0041] This application also provides a computer device, including: one or more processors, and memory;

[0042] The memory stores computer-readable instructions, which, when executed by the one or more processors, perform the steps of the load testing method as described in any of the above embodiments.

[0043] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0044] This application provides a load testing method, apparatus, storage medium, and computer equipment. When a load test is required on a protection device, the system can first acquire the primary power flow data of the protection device during the test interval under load, as well as the analog quantity information and device parameters of the protection device, enabling remote data acquisition and improving the safety of the load test. Then, a vector hexagon diagram of the protection device can be drawn based on the analog quantity information, clearly displaying the phase relationship and amplitude parameters of the electrical quantities such as current and voltage collected by the protection device. Simultaneously, the primary current and voltage values ​​of the protection device can be determined based on the analog quantity information and device parameters to ensure comprehensive data support for subsequent testing processes. Next, according to a preset test logic, the protection device can be tested step-by-step using the primary power flow data, vector hexagon diagram, and primary current and voltage values ​​to obtain test results. The preset test logic is a systematic testing process formed by multiple priority-ordered test items, thus enabling comprehensive and in-depth automated testing of the protection device, thereby improving the accuracy and efficiency of the testing process. After the load test is completed, this application can encapsulate the test results and vector hexagon diagram to form a load test report for subsequent analysis, evaluation and traceability. In addition, when there are abnormal results in the load test report, a system alarm can be triggered, so that relevant personnel can promptly discover potential faults in the protection device and prevent the fault from escalating. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A schematic flowchart of a load testing method provided in an embodiment of this application;

[0047] Figure 2 This is an interactive schematic diagram of a load testing system provided in an embodiment of this application;

[0048] Figure 3 This is a schematic diagram of the structure of a load testing device provided in an embodiment of this application;

[0049] Figure 4 This is a schematic diagram of the internal structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The load testing method based on power phasor measurement instruments still has many shortcomings. On the one hand, the on-site testing environment is complex, requiring personnel to operate at close range, posing a high risk of electric shock. On the other hand, the testing process relies on manual recording and analysis, which is inefficient and prone to errors, and manual analysis may miss key issues. In short, traditional load testing methods are difficult to implement, thus reducing overall work efficiency and increasing operation and maintenance costs.

[0052] Based on this, this application proposes the following technical solution, as detailed below:

[0053] In one embodiment, such as Figure 1 As shown, Figure 1 This is a flowchart illustrating a load testing method provided in an embodiment of this application. The application provides a load testing method, specifically including the following:

[0054] S110: Acquire primary power flow data of the protection device during the test interval when it is running under load, as well as acquire analog quantity information and device parameters of the protection device.

[0055] In this step, when it is necessary to perform load testing on the protection device, the operation and maintenance management platform can first obtain the power flow data of the protection device during the test interval when it is running under load, as well as the analog quantity information and device parameters of the protection device. By remotely acquiring the data, the safety of the load test can be improved.

[0056] Specifically, the protection device of this application can be used to detect the operating status of the power system. It is a device that detects faults such as short circuits or overloads and quickly disconnects power when necessary. Therefore, in order to ensure the stable operation of the power system, this application can verify and test the function of the protection device under normal operation and with actual load. During load testing, the operation and maintenance management platform can collect the primary power flow data of the protection device during the time interval between two adjacent tests, including active power, reactive power, primary current, voltage sampling values, etc. At the same time, the operation and maintenance management platform can also obtain the analog quantity information and device parameters of the protection device. The analog quantity data here refers to the value of continuously changing physical quantities collected and digitized in the protection device, including voltage, current, frequency, power, etc. The device parameters refer to the fixed values ​​set in the protection device, which are reference parameters used to control its behavior, such as current transformer ratio, voltage transformer ratio, etc.

[0057] It should be noted that when collecting power flow data, if the test interval is line protection, the operation and maintenance management platform needs to simultaneously obtain power flow data from the opposite side of the line to ensure data integrity.

[0058] It is understandable that when collecting relevant data for load testing of protection devices, this application can centrally and remotely acquire and analyze this data in real time. This not only avoids the personal risks associated with on-site contact with high-voltage equipment during traditional testing, but also improves the efficiency and accuracy of load testing. It ensures that load testing of protection devices can be completed efficiently without affecting the normal operation of the system, thereby further improving the intelligent management level and safety assurance capabilities of the power system.

[0059] S120: Draw the vector hexagonal diagram of the protection device based on analog information, and determine the primary current and voltage values ​​of the protection device based on analog information and device parameters.

[0060] In this step, after obtaining the analog quantity information and device parameters through step S110, the operation and maintenance management platform can draw a vector hexagonal diagram of the protection device based on the analog quantity information. The vector hexagonal diagram can clearly display the phase relationship and amplitude parameters of electrical quantities such as current and voltage collected by the protection device. At the same time, it can also determine the primary current and voltage values ​​of the protection device based on the device parameters to ensure comprehensive support of data in subsequent testing processes.

[0061] Specifically, the operation and maintenance management platform can draw a vector hexagon diagram of the protection device based on the analog quantity information collected by the protection device and using real-time data of electrical quantities such as current and voltage, through vector analysis. Therefore, by updating the vector hexagon diagram, the operation and maintenance management platform can reflect changes in the power grid's operating status in real time, thereby improving its ability to judge the response of the protection device to the system's electrical characteristics. At the same time, the operation and maintenance management platform can also combine the setpoint parameters in the device parameters to calculate the primary current and voltage values ​​based on the analog quantity information, achieving the restoration and conversion of primary current and voltage values, further improving the accuracy of data application.

[0062] S130: According to the preset test logic, the protection device is tested step by step using primary power flow data, vector hexagon diagram and primary current and voltage values ​​to obtain the test results; the preset test logic includes multiple test items ordered by priority.

[0063] In this step, after obtaining the primary power flow data, vector hexagon diagram, and primary current and voltage values ​​through steps S110 and S120 respectively, the operation and maintenance management platform can use these data to perform step-by-step testing on the protection device according to the preset test logic and obtain the test results. The preset test logic is a systematic testing process formed by multiple test items ordered by priority, so it can perform comprehensive and in-depth automated testing on the protection device, thereby improving the accuracy and efficiency of the testing process.

[0064] Specifically, the operation and maintenance management platform can conduct a systematic and orderly step-by-step testing process on the protection device based on preset testing logic. This preset testing logic consists of multiple interrelated test items ordered according to priority, covering aspects such as evaluating the response capability of the protection device under different operating conditions and fault simulation conditions, verifying the accuracy of action judgment, and checking the adaptability of protection settings. When executing the testing process, the operation and maintenance management platform can sequentially call the corresponding test items, and combine them with the primary power flow data, vector hexagon diagram, and primary current and voltage values ​​collected in the early stage to automatically identify and judge the various functions and status of the protection device, ensuring that the testing process is highly targeted and complete, thereby improving testing efficiency.

[0065] S140: Encapsulate the detection results and vector hexagonal diagram to form a load test report, and trigger a system alarm when there are abnormal results in the load test report.

[0066] In this step, after generating the test results through step S130, the operation and maintenance management platform can encapsulate the test results and vector hexagon diagram to form a load test report for subsequent analysis, evaluation and traceability. In addition, when there are abnormal results in the load test report, the operation and maintenance management platform can also trigger system alarms, so that relevant personnel can promptly discover potential faults in the protection device and avoid the fault from escalating.

[0067] Specifically, the operation and maintenance management platform can encapsulate the test results and vector hexagonal diagrams according to preset report templates, automatically generating a load test report containing charts, data lists, and test results. During the report generation process, the operation and maintenance management platform can also automatically perform anomaly analysis on the test results and, when test items have abnormal results, trigger the corresponding alarm mechanism according to the alarm policy to send real-time alarm information to relevant personnel.

[0068] Furthermore, when abnormal results are found in the load test report, the operation and maintenance management platform can highlight the corresponding test items and their results in the report, along with relevant screenshots and data link analysis, enhancing the ability to trace problems. In addition, after triggering a system alarm, the operation and maintenance management platform can send real-time alarm information to operation and maintenance personnel or on-duty personnel, including the field equipment number, description of the abnormality, time of occurrence, and suggested handling measures. This provides direction for subsequent fault investigation and handling, ensuring that relevant personnel can be aware of the location of equipment abnormalities and intervene in a timely manner, thereby ensuring the safe and stable operation of the power system.

[0069] In the above embodiments, when a load test is required on the protection device, the primary power flow data of the protection device during the test interval under load can be acquired first, along with the analog quantity information and device parameters of the protection device, enabling remote data acquisition and improving the safety of the load test. Then, a vector hexagon diagram of the protection device can be drawn based on the analog quantity information, clearly displaying the phase relationship and amplitude parameters of the electrical quantities such as current and voltage collected by the protection device. Simultaneously, the primary current and voltage values ​​of the protection device can be determined based on the device parameters to ensure comprehensive data support for subsequent testing processes. Next, according to a preset test logic, the protection device can be tested step-by-step using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values ​​to obtain the test results. The preset test logic is a systematic testing process formed by multiple test items ordered by priority, thus enabling comprehensive and in-depth automated testing of the protection device, thereby improving the accuracy and efficiency of the testing process. After the load test is completed, this application can encapsulate the test results and vector hexagon diagram to form a load test report for subsequent analysis, evaluation and traceability. In addition, when there are abnormal results in the load test report, a system alarm can be triggered, so that relevant personnel can promptly discover potential faults in the protection device and prevent the fault from escalating.

[0070] In one embodiment, the process of obtaining primary power flow data of the protection device during the test interval when it is under load in step S110 may include:

[0071] S111: Establish a communication interface between the main network scheduling automated monitoring and operation system and the protection information system, so that the protection information system can obtain the primary power flow data of the protection device during the test interval when it is under load from the automated monitoring and operation system through the communication interface.

[0072] In this embodiment, when acquiring primary power flow data of the protection device, the operation and maintenance management platform can establish a communication interface with the protection information system through the main network scheduling automated monitoring operation system. This allows the protection information system to acquire primary power flow data of the protection device during the test interval when it is under load from the automated monitoring operation system through the communication interface, thereby realizing remote automatic acquisition of data.

[0073] Among them, the automated monitoring and operation system refers to the real-time monitoring and control center of the power system. It can cover functions such as data acquisition, communication transmission and intelligent analysis, and can realize comprehensive perception and precise control of the power grid operation status. The protection and information system is mainly used for the management and control of power system relay protection devices, focusing on the full life cycle management, fault analysis and action logic verification of protection equipment.

[0074] Understandably, in order to achieve remote automatic acquisition of primary power flow data of the protection device, this application can rely on the deep collaboration between the main network scheduling automation monitoring and operation system and the protection information system to achieve data interaction by building a standardized communication interface.

[0075] Specifically, when a load test is required on a specific protection device, the operation and maintenance management platform can initiate a data request through the management interface of the protection and information system (PEIS). Upon receiving the request, PEIS can parse and verify it according to a preset communication protocol, such as IEC 61850 or DL / T 860 standards, ensuring the data format is compliant and the target device is accessible. Subsequently, PEIS can send a data subscription command to the main network dispatch automation monitoring and operation system through a pre-configured communication channel, such as Ethernet, fiber optic ring network, or dedicated dispatch data network. Upon receiving the subscription request, the automation monitoring and operation system can collect raw data from the plant-side RTU or IED equipment through the front-end module. After data preprocessing, the primary power flow data that meets the accuracy requirements is stored in the real-time database, enabling PEIS to acquire the primary power flow data.

[0076] In one embodiment, the process of drawing the vector hexagonal diagram of the protection device based on analog information in step S120 may include:

[0077] S121: Identify the three-phase current and voltage information and differential current information of the protection device from the analog signal information.

[0078] S122: Determine the phase relationship between current and voltage in the protection device based on three-phase current and voltage information and differential current information.

[0079] S123: Using CANVAS image processing technology, a vector hexagonal diagram of the protection device is drawn based on the phase relationship.

[0080] In this embodiment, when drawing the vector hexagonal diagram, the operation and maintenance management platform can identify the three-phase current and voltage information and differential current information of the protection device from the analog quantity information. Then, based on the three-phase current and voltage information and differential current information, it determines the phase relationship between the current and voltage in the protection device. Finally, it can use CANVAS image processing technology to draw the vector hexagonal diagram of the protection device according to the phase relationship, so as to clearly display the phase relationship and amplitude parameters of the electrical quantities such as current and voltage collected by the protection device.

[0081] Understandably, the three-phase current and voltage information here can include the floating values ​​and phase angles of the three-phase current and voltage, and the differential current information can also include the large and small differential information of the bus differential protection. Since these data can be represented in vector form, when drawing the vector hexagon diagram, the operation and maintenance management platform can first determine whether these data require vector calculation; if not, the vector hexagon diagram can be drawn directly; if so, vector synthesis must be performed first before the vector hexagon diagram can be drawn.

[0082] Specifically, the operation and maintenance management platform can analyze the identified data using vector analysis algorithms to obtain the phase relationship between the three-phase current and voltage. Combined with differential current information, it can determine the balance of electrical quantities and the symmetry of system operation, such as identifying unbalanced loads or wiring abnormalities. After completing the phase calculation, the operation and maintenance management platform can call the front-end graphics rendering engine and use HTML5-based CANVAS image processing technology to construct a hexagonal diagram framework based on regular hexagons, according to the set drawing rules. It then accurately draws the current and voltage vectors of each phase according to their phase angle and amplitude coordinates, forming a vector hexagonal diagram.

[0083] Furthermore, in the vector hexagon diagram, the operation and maintenance management platform can use colors to distinguish current and voltage vectors. For example, red, yellow, and blue can represent phases A, B, and C, with arrows indicating direction and vector length indicating magnitude, making information such as phase difference relationships and system balance readily apparent. In addition, differential current information can be displayed in the diagram as independent vectors or superimposed with labels, further enhancing the visualization strength of the image. Moreover, the operation and maintenance management platform can support real-time updates of the vector hexagon diagram and comparison with historical data, ultimately achieving a visual display of the electrical operating status of protection devices.

[0084] In one embodiment, the primary current and voltage values ​​in step S120 may include a primary current value and a primary voltage value; wherein, the process of determining the primary current and voltage values ​​of the protection device based on device parameters may include:

[0085] S124: Read the current transformer ratio and voltage transformer ratio of the protection device from the device parameters, and extract the secondary current value and secondary voltage value from the analog quantity information.

[0086] S125: Determine the primary current value of the protection device based on the current transformer ratio and secondary current value, and determine the primary voltage value of the protection device based on the voltage transformer ratio and secondary voltage value.

[0087] In this embodiment, when restoring primary-side data of current and voltage values, the operation and maintenance management platform can read the current transformer ratio and voltage transformer ratio of the protection device from the device parameters, and extract the secondary current value and secondary voltage value from the analog quantity information. Then, it determines the primary current value of the protection device based on the current transformer ratio and secondary current value, and determines the primary voltage value of the protection device based on the voltage transformer ratio and secondary voltage value.

[0088] Understandably, since the device parameters mainly consist of fixed parameter values ​​pre-set for the protection devices, the operation and maintenance management platform can read the transformation ratio parameters of the current transformer (CT) and voltage transformer (PT). These ratios are typically expressed as the ratio of the primary side to the rated values ​​of the secondary side; for example, the CT ratio is 1000:5, and the PT ratio is 110:5. Analog information consists of real-time physical data collected from the protection device. Therefore, the operation and maintenance management platform can extract the current secondary current and secondary voltage values ​​of the protection device from it. These values ​​are standard signals collected through the secondary side circuit connected to the protection device, representing the secondary side amplitude values ​​of the current and voltage of each phase under the current power system operating conditions.

[0089] Specifically, the operation and maintenance management platform can use the CT ratio and PT ratio to convert the secondary current value and secondary voltage value respectively. The specific calculation formula is as follows:

[0090] Primary current value = Secondary current value × CT ratio

[0091] Primary voltage value = Secondary voltage value × PT ratio

[0092] During the conversion process, the operation and maintenance management platform can perform phase-by-phase calculations by combining independent data for each phase, ensuring that the conversion results for each phase meet the platform's analysis requirements in terms of accuracy and real-time performance.

[0093] In one embodiment, step S130, which involves performing step-by-step testing of the protection device according to a preset test logic using primary power flow data, a vector hexagon diagram, and primary current and voltage values ​​to obtain the test results, may include:

[0094] S131: Extract test data for each test item in the preset test logic from primary power flow data, vector hexagon diagram, and primary current and voltage values.

[0095] S132: Determine the highest priority based on the priority of the undetected test items, and perform anomaly detection on the test data of the test items corresponding to the highest priority to obtain the detection results.

[0096] S133: If the test result is normal, return the highest priority of the untested test items and its subsequent steps until the test items are tested and the test result is generated.

[0097] S134: If the test result is abnormal, stop the load test of the protection device and generate the test result.

[0098] In this embodiment, during the load test, the operation and maintenance management platform can first extract the test data for each test item in the preset test logic from the primary power flow data, vector hexagon diagram, and primary current and voltage values. Then, it can determine the highest priority according to the priority of the untested test items and perform anomaly detection on the test data of the test item corresponding to the highest priority to obtain the detection result. When the detection result is normal, the operation and maintenance management platform can continue to select the highest priority test item from the untested test items for testing until the test item testing is completed and a detection result is generated. When the detection result is abnormal, the operation and maintenance management platform can stop the load test of the protection device and generate a detection result.

[0099] Specifically, at the start of load testing, the operation and maintenance management platform can extract basic data related to each test item from the acquired primary power flow data, vector hexagon diagram, and primary current and voltage values. This data includes, but is not limited to, key electrical quantities such as the amplitude and phase difference of three-phase current and voltage, load imbalance, power factor, differential current magnitude, and direction. Then, the operation and maintenance testing platform can use its data parsing module to match this information with preset test logic, identify currently untested test items, and automatically sort them according to their priority, prioritizing the highest-ranking test item for entry into the testing process.

[0100] After load testing begins, the operation and maintenance management platform can input the corresponding test data into the anomaly identification module of that test item. This module analyzes the data based on set judgment thresholds, model rules, or expert system rules to determine if any anomalies exist, such as exceeding limits, phase sequence errors, asymmetry, or protection errors, and finally outputs the detection results. When the detection result is determined to be normal, the operation and maintenance management platform can automatically update the test progress, mark the test item as completed, and repeat the above process from the remaining untested test items, selecting the highest priority item until all test items are tested. Each round of testing records complete input data, testing time, processing logic, and judgment conclusions to ensure traceability and structured management of test results.

[0101] Understandably, since each round of test items in the preset test logic has a strict dependency and priority relationship, the abnormal result of the current test item directly affects the accuracy of the subsequent test data and the validity of the logical premise. Therefore, when the test result of a certain round is judged to be abnormal, the operation and maintenance management platform will immediately interrupt the remaining test process and output the test result.

[0102] For example, during the testing process, the operation and maintenance management platform first calculates the current transformer ratio based on the primary and secondary current values. If this ratio is abnormal, it will cause distortion in the subsequent current and voltage analysis results based on the primary side data, making further verification impossible. Similarly, if the test reveals a significant deviation of the vector angle from the 120° symmetrical phase relationship, it may not only be due to abnormalities in the protection device sampling unit or the configuration of the voltage and current transformers, but may also cause distortion of the vector hexagon diagram and inaccurate differential current judgment, thereby affecting the entire fault analysis and action judgment logic. Therefore, the operation and maintenance management platform can set abnormal detections as critical control points for process interruption to prevent invalid or erroneous tests from continuing, thus ensuring the rigor, safety, and accuracy of the entire load testing process.

[0103] In one embodiment, the priority ordering of test items in the preset test logic in step S132 may include:

[0104] S1321: Determine whether the phase angles of the three current transformers in the same group of the protection device are arranged in a positive sequence of 120°.

[0105] S1322: Determine if differential current exists in the protection device.

[0106] S1323: Determine whether the primary current value of the protection device and the current transformer ratio are consistent with the equipment settings.

[0107] S1324: Determine whether the positive and negative values ​​of the active and reactive power of the protection device are correct.

[0108] S1325: Determine whether the polarity of the current transformer in the bus differential protection device is consistent with the corresponding interval protection.

[0109] In this embodiment, the tests are ordered according to priority. The test items in the preset test logic are as follows: determine whether the phase angles of the three current transformers in the same group of the protection device are arranged in a positive order of 120°; determine whether the protection device has differential current; determine whether the primary current value and current transformer ratio of the protection device are consistent with the equipment setting; determine whether the positive and negative values ​​of the active power and reactive power of the protection device are correct; and determine whether the polarity of the current transformer in the bus differential group of the protection device is consistent with the corresponding interval protection.

[0110] Specifically, the test item for determining whether the phase angles of the three current transformers in the same group of protection devices are in positive order with a 120° interval between them belongs to all types of full-voltage protection. Its abnormality criterion is manifested by abnormal phase angle, as follows:

[0111]

[0112]

[0113]

[0114] In the formula, This represents the angle between any two phases of the three-phase system A, B, and C. , , These represent the currents in phases A, B, and C, respectively.

[0115] The test item for determining whether a protection device has differential current belongs to differential protection. Its anomaly judgment criteria are manifested as abnormal differential current of main transformer protection and abnormal differential current of line and bus differential protection, as follows:

[0116] (1) Criteria for differential current anomaly in main transformer protection:

[0117]

[0118]

[0119] In the formula, This represents the differential current; S represents the maximum rated capacity of the transformer; U represents the rated primary voltage on the high-voltage side; and n represents the current transformer ratio. All of these can be obtained from the device parameters.

[0120] (2) Criteria for abnormal differential current of line and bus differential protection:

[0121]

[0122] In the formula, This indicates the rated secondary current value of the current transformer, which can be obtained from the device parameters.

[0123] The test items that determine whether the primary current value and current transformer ratio of the protection device are consistent with the equipment settings belong to all types of protection. Its abnormality judgment criterion is manifested by abnormal ratio, as shown in the following:

[0124]

[0125]

[0126] In the formula, Indicates the primary current value for protection; This represents the average value of the secondary current in the protection device; n represents the current transformer ratio setting in the protection device. It is represented as the primary current value for measurement and control, which can be obtained from the primary power flow data.

[0127] The test item for determining whether the positive and negative values ​​of the active and reactive power of the protection device are correct belongs to the line and main transformer protection. Its abnormality judgment criterion is that the power direction is abnormal, specifically as follows:

[0128]

[0129]

[0130] In the formula, P represents active power; Q represents reactive power. , This represents the active and reactive power calculated using the protection current and voltage. Indicates the voltage transformer ratio; Indicates the current transformer ratio; , This indicates that active and reactive power are obtained from primary power flow data through measurement and control.

[0131] Determining whether the polarity of the current transformer in the bus differential protection group of the protection device is consistent with that of the corresponding interval protection belongs to bus protection. Its anomaly judgment criteria are manifested by abnormal reference voltage comparison and abnormal polarity comparison, as follows:

[0132] (1) Criteria for judging anomalies in reference voltage comparison:

[0133]

[0134] In the formula, This indicates the reference voltage corresponding to this busbar protection bay; This indicates the protection voltage of the interval protection device.

[0135] (2) Criterion for abnormal polarity contrast:

[0136]

[0137]

[0138] In the formula, This indicates that the busbar protects the current in this interval; This indicates the protection current of the interval protection device.

[0139] In one embodiment, the method may further include:

[0140] S150: Before drawing the vector hexagon diagram, determine whether the analog quantity information and device parameters are complete.

[0141] S160: If complete, determine whether the protection device meets the conditions for load testing based on the analog quantity information and device parameters; the conditions for load testing include three currents and the three currents of the same group of current transformers being balanced.

[0142] S170: If the analog quantity information and / or device parameters are incomplete, or the protection device does not meet the conditions for load testing, then load testing shall not be performed.

[0143] In this embodiment, before drawing the vector hexagon diagram, the operation and maintenance management platform can determine whether the analog quantity information and device parameters are complete. If complete, the platform can determine whether the protection device meets the conditions for load testing based on the analog quantity information and device parameters; these conditions include three current-carrying currents and balanced currents in the same group of current transformers. If the analog quantity information and / or device parameters are incomplete, or the protection device does not meet the conditions for load testing, the platform can choose not to perform the load test.

[0144] Specifically, before conducting load testing, the operation and maintenance management platform first performs a comprehensive check on the analog quantity information and device parameters of the protection device to ensure the completeness and validity of this data. If this information and parameters are complete and valid, the operation and maintenance management platform can determine whether the protection device meets the prerequisites for load testing based on this data. The load testing conditions include two aspects: firstly, it must be ensured that there is flowing current in the current loop during the test; secondly, the three-phase currents of the current transformer must remain balanced within the same group of transformers to ensure relative current consistency and avoid affecting the test results due to imbalance. Only when these conditions are met will the operation and maintenance management platform continue with the load testing and initiate subsequent testing procedures. If analog quantity information or device parameters are missing, or if the protection device does not meet the basic conditions for load testing, the operation and maintenance management platform will automatically terminate the testing process to avoid erroneous results or unsafe testing environments caused by incomplete data or non-compliance with testing conditions, thereby ensuring the accuracy of the test and the safety of the equipment.

[0145] Specifically, when testing whether the protection equipment has specific load test conditions, you can first determine whether there is current in the three phases. The criteria for this determination can be as follows:

[0146] No-flow-phase criterion:

[0147] Criterion for flow phase:

[0148]

[0149] In the formula, This indicates the rated secondary current value of the current transformer, which can be obtained from the equipment parameters.

[0150] After obtaining the judgment result through the above formula, if the judgment result is no current in all three phases, the operation and maintenance management platform can output: no load, no load test will be performed; if the judgment result shows both current-carrying and current-free phases, the operation and maintenance management platform can output: no current-carrying phase current loop is open. If the judgment result is current in all three phases, the operation and maintenance management platform can further determine whether the three-phase currents of the same group of current transformers are balanced.

[0151] The criteria for three-phase amplitude imbalance are as follows:

[0152]

[0153]

[0154] In the formula, This represents the average value of the secondary current in the protection circuit. This indicates the maximum value of the secondary current for protection; This indicates the minimum value of the secondary current for protection.

[0155] To better explain the load testing method of this application, the following will be conducted through... Figure 3 To further illustrate, illustratively, such as Figure 2 As shown, Figure 2 This is an interactive schematic diagram of a load testing system provided in an embodiment of this application.

[0156] Figure 2 In this system, the secondary equipment operation and maintenance management platform can generate primary power flow data from the load flow status of the scheduling end in the OSC system (Insurance and Information System), as well as the voltage, current amplitude, and phase angle of the measurement group. Simultaneously, it can obtain real-time voltage and current of the protection device from the substation / protection device as analog information. Based on the acquired data, the operation and maintenance management platform can automatically draw a vector hexagonal diagram of the protection device using CANVAS image processing technology. Then, it can perform project inspections based on this vector hexagonal diagram and generate a load test report based on the inspection results. If there are abnormal results in the load test report, the operation and maintenance management platform can also issue an anomaly alarm.

[0157] The load testing apparatus provided in the embodiments of this application is described below. The load testing apparatus described below can be referred to in correspondence with the load testing method described above.

[0158] In one embodiment, such as Figure 3 As shown, Figure 3This application provides a schematic diagram of a load testing device according to an embodiment of the present application. The present application also provides a load testing device, including a data acquisition module 210, a hexagonal diagram drawing module 220, a load testing module 230, and a report generation module 240, specifically comprising the following:

[0159] The data acquisition module 210 is used to acquire primary power flow data of the protection device during the test interval when it is running under load, as well as to acquire analog quantity information and device parameters of the protection device.

[0160] The hexagonal diagram drawing module 220 is used to draw a vector hexagonal diagram of the protection device based on analog quantity information, and to determine the primary current and voltage values ​​of the protection device based on analog quantity information and device parameters.

[0161] The load test module 230 is used to perform step-by-step testing on the protection device according to the preset test logic, using primary power flow data, vector hexagon diagram and primary current and voltage values, and obtain the test results; wherein, the preset test logic includes multiple test items ordered by priority.

[0162] The report generation module 240 is used to encapsulate the detection results and vector hexagonal diagram to form a load test report, and to trigger a system alarm when there are abnormal results in the load test report.

[0163] In the above embodiments, when a load test is required on the protection device, the primary power flow data of the protection device during the test interval under load can be acquired first, along with the analog quantity information and device parameters of the protection device, enabling remote data acquisition and improving the safety of the load test. Then, a vector hexagon diagram of the protection device can be drawn based on the analog quantity information, clearly displaying the phase relationship and amplitude parameters of the electrical quantities such as current and voltage collected by the protection device. Simultaneously, the primary current and voltage values ​​of the protection device can be determined based on the analog quantity information and device parameters to ensure comprehensive data support for subsequent testing processes. Next, according to a preset test logic, the protection device can be tested step-by-step using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values ​​to obtain the test results. The preset test logic is a systematic testing process formed by multiple test items ordered by priority, thus enabling comprehensive and in-depth automated testing of the protection device, thereby improving the accuracy and efficiency of the testing process. After the load test is completed, this application can encapsulate the test results and vector hexagon diagram to form a load test report for subsequent analysis, evaluation and traceability. In addition, when there are abnormal results in the load test report, a system alarm can be triggered, so that relevant personnel can promptly discover potential faults in the protection device and prevent the fault from escalating.

[0164] In one embodiment, the data acquisition module 210 may include:

[0165] The interface establishment submodule is used to establish a communication interface between the main network scheduling automated monitoring and operation system and the protection information system, so that the protection information system can obtain the primary power flow data of the protection device during the test interval when it is under load from the automated monitoring and operation system through the communication interface.

[0166] In one embodiment, the hexagonal diagram drawing module 220 may include:

[0167] The information identification submodule is used to identify the three-phase current and voltage information and differential current information of the protection device from the analog information.

[0168] The phase determination submodule is used to determine the phase relationship between current and voltage in the protection device based on three-phase current and voltage information and differential current information.

[0169] The image drawing submodule is used to draw a vector hexagonal diagram of the protection device based on the phase relationship using CANVAS image processing technology.

[0170] In one embodiment, the primary current and voltage values ​​in the hexagonal diagram drawing module 220 may include primary current values ​​and primary voltage values; the hexagonal diagram drawing module 220 may also include:

[0171] The parameter reading submodule is used to read the current transformer ratio and voltage transformer ratio of the protection device from the device parameters, and to extract the secondary current value and secondary voltage value from the analog quantity information.

[0172] The parameter conversion submodule is used to determine the primary current value of the protection device based on the current transformer ratio and secondary current value, and to determine the primary voltage value of the protection device based on the voltage transformer ratio and secondary voltage value.

[0173] In one embodiment, the load testing module 230 may include:

[0174] The data extraction submodule is used to extract test data for each test item in the preset test logic from primary power flow data, vector hexagonal diagram, and primary current and voltage values.

[0175] The project detection submodule is used to determine the highest priority based on the priority of the undetected test projects, and to perform anomaly detection on the test data of the test projects corresponding to the highest priority to obtain the detection results.

[0176] The first result generation submodule is used to return the highest priority of the undetected test items and their subsequent steps when the detection result is normal, until the test items are detected and the detection result is generated.

[0177] The second result generation submodule is used to stop the load test of the protection device and generate the test result when the test result is abnormal.

[0178] In one embodiment, the project detection submodule may include:

[0179] The first detection unit is used to determine whether the phase angles of the three current transformers in the same group of the protection device are arranged in a positive sequence of 120°.

[0180] The second detection unit is used to determine whether differential current exists in the protection device.

[0181] The third detection unit is used to determine whether the primary current value of the protection device and the current transformer ratio are consistent with the equipment settings.

[0182] The fourth detection unit is used to determine whether the positive and negative values ​​of the active power and reactive power of the protection device are correct.

[0183] The fifth detection unit is used to determine whether the polarity of the current transformer in the bus differential group of the protection device is consistent with the corresponding interval protection.

[0184] In one embodiment, the apparatus may further include:

[0185] The integrity judgment module is used to determine whether the analog quantity information and device parameters are complete before drawing the vector hexagon diagram.

[0186] The condition judgment module is used to determine whether the protection device meets the conditions for load testing based on the analog quantity information and device parameters if the condition is complete. The conditions for load testing include three current phases and the three current phases of the same group of current transformers being balanced.

[0187] The result determination module is used to prevent load testing if the analog quantity information and / or device parameters are incomplete, or if the protection device does not meet the conditions for load testing.

[0188] In one embodiment, this application also provides a storage medium storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the load testing method as described in any of the above embodiments.

[0189] In one embodiment, this application also provides a computer device storing computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the load testing method as described in any of the above embodiments.

[0190] Indicatively, such as Figure 4 As shown, Figure 4This is a schematic diagram of the internal structure of a computer device 300 provided in an embodiment of this application. The computer device 300 can be provided as a server. (Refer to...) Figure 4 The computer device 300 includes a processing component 302, which further includes one or more processors, and memory resources represented by memory 301 for storing instructions, such as application programs, that can be executed by the processing component 302. The application programs stored in memory 301 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 302 is configured to execute instructions to perform the load testing methods of any of the above embodiments.

[0191] The computer device 300 may also include a power supply component 303 configured to perform power management of the computer device 300, a wired or wireless network interface 304 configured to connect the computer device 300 to a network, and an input / output (I / O) interface 305. The computer device 300 may operate on an operating system stored in memory 301, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™, or similar.

[0192] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0193] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0194] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0195] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for load testing, characterized in that, The method includes: Acquire power flow data of the protection device during the test interval when it is running under load, and acquire analog quantity information and device parameters of the protection device; Based on the analog quantity information, a vector hexagonal diagram of the protection device is drawn, and the primary current and voltage values ​​of the protection device are determined based on the analog quantity information and the device parameters. According to the preset test logic, the protection device is tested step by step using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values ​​to obtain the test results; wherein, the preset test logic includes multiple test items ordered by priority. The detection results and the vector hexagon diagram are encapsulated to form a load test report, and a system alarm is triggered when there are abnormal results in the load test report.

2. The load testing method according to claim 1, characterized in that, The acquisition of power flow data during the test interval of the protection device under load includes: The main network scheduling automated monitoring and operation system establishes a communication interface with the protection information system, so that the protection information system can obtain the power flow data of the protection device during the test interval when it is under load from the automated monitoring and operation system through the communication interface.

3. The load testing method according to claim 1, characterized in that, The process of drawing the vector hexagonal diagram of the protection device based on the analog quantity information includes: The three-phase current and voltage information and differential current information of the protection device are identified from the analog quantity information; The phase relationship between current and voltage in the protection device is determined based on the three-phase current and voltage information and the differential current information. Using CANVAS image processing technology, a vector hexagonal diagram of the protection device is drawn based on the phase relationship.

4. The load testing method according to claim 1, characterized in that, The primary current and voltage values ​​include the primary current value and the primary voltage value; Determining the primary current and voltage values ​​of the protection device based on the analog quantity information and the device parameters includes: Read the current transformer ratio and voltage transformer ratio of the protection device from the device parameters, and extract the secondary current value and secondary voltage value from the analog quantity information; The primary current value of the protection device is determined based on the current transformer ratio and the secondary current value, and the primary voltage value of the protection device is determined based on the voltage transformer ratio and the secondary voltage value.

5. The load testing method according to claim 1, characterized in that, The protection device is tested step-by-step according to a preset test logic, using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values, to obtain the test results, including: The test data for each test item in the preset test logic is extracted from the primary power flow data, the vector hexagon diagram, and the primary current and voltage values. The highest priority is determined by sorting the undetected test items by priority, and anomaly detection is performed on the test data of the test items corresponding to the highest priority to obtain the detection results; If the test result is normal, return the highest priority of the test items that were determined not to be tested and their subsequent steps until the test items are tested and the test result is generated; If the test result is abnormal, the load test of the protection device is stopped and the test result is generated.

6. The load testing method according to claim 5, characterized in that, The priority order of test items in the preset test logic includes: Determine whether the phase angles of the three current transformers in the same group of the protection device are arranged in a positive sequence of 120°. Determine whether the protection device has differential current; Determine whether the primary current value and current transformer ratio of the protection device are consistent with the equipment settings. Determine whether the positive and negative values ​​of the active power and reactive power of the protection device are correct; Determine whether the polarity of the current transformer in the bus differential group of the protection device is consistent with that of the corresponding interval protection.

7. The load testing method according to claim 1, characterized in that, The method further includes: Before drawing the vector hexagon diagram, determine whether the analog quantity information and the device parameters are complete; If complete, then determine whether the protection device meets the conditions for load testing based on the analog quantity information and the device parameters; the conditions for load testing include three current-carrying currents and the three currents of the same group of current transformers being balanced. If the analog quantity information and / or the device parameters are incomplete, or if the protection device does not meet the conditions for load testing, then load testing will not be performed.

8. A load testing device, characterized in that, include: The data acquisition module is used to acquire power flow data of the protection device during the test interval when it is running under load, as well as to acquire analog quantity information and device parameters of the protection device. The hexagonal diagram drawing module is used to draw a vector hexagonal diagram of the protection device based on the analog quantity information, and to determine the primary current and voltage values ​​of the protection device based on the analog quantity information and the device parameters. The load testing module is used to perform step-by-step testing on the protection device according to the preset test logic, using the primary power flow data, the vector hexagon diagram, and the primary current and voltage values, to obtain the test results; wherein, the preset test logic includes multiple test items ordered by priority; The report generation module is used to encapsulate the detection results and the vector hexagonal diagram to form a load test report, and to trigger a system alarm when there are abnormal results in the load test report.

9. A storage medium, characterized in that: The storage medium stores computer-readable instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of the load testing method as described in any one of claims 1 to 7.

10. A computer device, characterized in that, include: One or more processors, and memory; The memory stores computer-readable instructions that, when executed by the one or more processors, perform the steps of the load testing method as described in any one of claims 1 to 7.

Images