Electric energy meter fault test system and method

Abstract

The invention discloses an electric energy meter fault test system and method, and relates to the technical field of electric energy meters, and the system comprises an upper computer module, a station crimping module and an automatic measurement and control module which communicate with one another. The station crimping module is connected with the to-be-tested electric energy meter, receives a crimping instruction issued by the upper computer module, triggers a probe crimping test point, and synchronously feeds back a crimping state signal to the upper computer module; the automatic measurement and control module receives a test instruction issued by the upper computer module, starts a power supply to supply power, synchronously collects multi-channel voltage data and current data to generate test data, and feeds back the test data to the upper computer module; and the upper computer module receives the crimping state signal, issues a test instruction to the automatic measurement and control module when the crimping state is judged to be correct, calculates electrical parameters of the to-be-tested electric energy meter according to the received test data, and outputs fault information according to a calculation result so as to maintain stable operation of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy meters, and more particularly to a fault testing system and method for electric energy meters. Background Art

[0002] With the popularization and use of the new generation of intelligent electric energy meters, faults of electric energy meters have emerged continuously. Therefore, it is necessary to analyze the causes of faults at the component level for electric energy meter faults. The electrical performance analysis of printed circuit boards plays a crucial role in improving the fault analysis efficiency of intelligent electric energy meters and enhancing the equipment quality.

[0003] However, the traditional manual testing method has the defects of low testing efficiency and large errors in testing results, making it difficult to quickly and accurately locate the fault points of electric energy meters and unable to effectively maintain and prevent electric energy meter equipment.

[0004] Therefore, how to effectively test the faults of electric energy meters and achieve accurate fault analysis has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides a fault testing system and method for electric energy meters, which solves the problem of how to perform automated testing of the electrical performance of electric energy meters and accurately locate faults through integrated design, thereby improving the lifespan and operation and maintenance efficiency of power equipment and maintaining the stable operation of the power system.

[0006] To solve the above technical problems, an embodiment of the present invention provides a fault testing system for electric energy meters. The system includes a host computer module, a station crimping module, and an automatic measurement and control module that communicate with each other;

[0007] The station crimping module is connected to the electric energy meter to be tested, receives the crimping instruction sent by the host computer module, triggers the probe to crimp the test point, and synchronously feeds back the crimping status signal to the host computer module;

[0008] The automatic measurement and control module receives the test instruction sent by the host computer module, starts power supply, synchronously collects multi-channel voltage data and current data to generate test data, and feeds back the test data to the host computer module;

[0009] The host computer module receives the crimping status signal. When it determines that the crimping status is correct, it sends the test instruction to the automatic measurement and control module. The host computer module calculates the electrical parameters of the electric energy meter to be tested based on the received test data, and outputs fault information based on the calculation result; the fault information includes fault location, fault type, and equipment lifespan information.

[0010] Further, the station crimping module drives and adjusts the probe crimping position and force through a telescopic solenoid valve.

[0011] Further, a pressure sensor is embedded in the station crimping module for feeding back the crimping status signal.

[0012] Further, the host computer module is provided with an interface for interacting with the fault analysis software, which is used to call corresponding algorithms to process and analyze the test data, output the fault information, and synchronously send a test termination instruction to the automatic measurement and control module.

[0013] Further, the host computer module displays in real time the daily freeze data curve and load curve generated after processing and analyzing the test data through the set display interface.

[0014] Further, the host computer module is provided with an interface for interacting with the parameter configuration software, which is used to call corresponding test items and parameter thresholds to generate the test instruction.

[0015] Further, the automatic measurement and control module is provided with an AD acquisition interface for collecting power parameter data. When the power parameter data meets the threshold condition, a power-on instruction is sent to the station crimping module to trigger the station crimping module to supply power to the to-be-tested electric energy meter.

[0016] Further, a filtering algorithm is embedded in the automatic measurement and control module, and the automatic measurement and control module calls the filtering algorithm to process the multi-channel voltage data and current data.

[0017] Further, the system further includes a database module for storing the fault information and the test data.

[0018] Another embodiment of the present invention provides an electric energy meter fault test method, which is applied to the electric energy meter fault test system as described above, and includes:

[0019] Fix the to-be-tested electric energy meter at the station, determine the target test item through the host computer module and press the corresponding test button;

[0020] In response to the instructions issued by the host computer module, perform crimping at the to-be-tested points of the to-be-tested electric energy meter through the station crimping module, and collect the voltage data and current data at the to-be-tested points through the automatic measurement and control module;

[0021] Analyze and process the voltage data and current data through the host computer module to generate a test report reflecting the fault information of the target test item;

[0022] Formulate corresponding equipment maintenance strategies according to the test report and execute them.

[0023] Compared with the prior art, the beneficial effects of the embodiments of the present invention are at least one of the following:

[0024] In the embodiments of the present invention, by coordinating the station pressing module, the automatic measurement and control module, and the upper computer module, the real working environment of the electric energy meter is simulated, the automatic analysis and accurate positioning of the cause of the electric energy meter failure are realized, the test efficiency is improved, the error caused by manual operation is avoided, effective fault prevention strategies and maintenance plans are formulated, and the reliable operation of the power system is ensured. Among them, by introducing a noise suppression algorithm, the automatic measurement and control module can efficiently collect and test the electrical performance parameters of the electric energy meter. Combining with the analysis algorithm, the upper computer module can realize the automatic configuration of the test scheme and the accurate processing of the measurement data, improve the traceability of the test data, and visually display the fault characteristics through dynamic curve visualization, assisting technicians to quickly locate the fault problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of an electric energy meter fault test system in one embodiment of the present invention;

[0026] Figure 2 It is an example diagram of parameter configuration in one embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the forward active total electric energy data curve of the daily frozen data in one embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the flow of an electric energy meter fault test method in one embodiment of the present invention;

[0029] Reference numerals: 1, upper computer module; 2, station pressing module; 3, automatic measurement and control module DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present application, the terms "first", "second", "third", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0032] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for the purpose of illustration, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In the description of the present application, it should be noted that unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] An embodiment of the present invention provides an electric energy meter fault test system. Specifically, please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of the electric energy meter fault test system in one of the embodiments of the present invention, including: a host computer module 1, a station crimping module 2, and an automatic measurement and control module 3 that communicate with each other.

[0035] By integrating the above three modules, the embodiment of the present invention realizes the accurate positioning of electric energy meter faults. Among them, for the station crimping module 2, it is connected to the electric energy meter to be tested, receives the crimping instruction sent by the host computer module, and triggers the probe to crimp the test point to be tested of the electric energy meter to be tested. Preferably, the probe is controlled to press down / release through a telescopic solenoid valve to drive the adjustment of the crimping position and strength of the probe. It can be understood that the telescopic solenoid valve is an actuator that controls the telescopic movement of the valve core through electromagnetic force and can realize the dynamic perception of the crimping strength.

[0036] The station crimping module 2 is provided with an asynchronous serial communication interface for interacting with the host computer module 1. Using this interface, the station crimping module 2 can synchronously feedback the crimping status signals collected during the crimping process to the host computer module 1 through the embedded pressure sensor. It can be understood that the crimping status signals include data such as the probe crimping position and force. The host computer module 1 receives the crimping status signals and, when judging that the crimping status is correct, issues a test instruction to the automatic measurement and control module 3. When it detects poor contact of the crimping needle, it issues an adjustment instruction to make the station crimping module 2 automatically adjust the probe position and force until the preset threshold conditions are met. In some embodiments of the present invention, the crimping strength threshold is set to 10N ± 0.5N.

[0037] Furthermore, the host computer module 1 in this embodiment can communicate bidirectionally with the station crimping module 2 and the automatic measurement and control module 3. Therefore, the host computer module 1 generates corresponding test instructions according to the selected test items by the user and issues them to the automatic measurement and control module 3 to collect the electrical characteristic parameters of the electricity meter to be tested.

[0038] The automatic measurement and control module 3 is provided with a serial asynchronous communication interface for interacting with the host computer module 1. It receives the test instructions issued by the host computer module 1 and starts the power supply. In some embodiments of the present invention, the automatic measurement and control module 3 is provided with an AD acquisition module and a corresponding AD acquisition interface, that is, the automatic measurement and control module 3 acquires power parameter data, such as power supply internal resistance data, through the AD acquisition module. When the power parameter data meets the threshold conditions, it sends a power-on instruction to the station crimping module 2. For example, the threshold condition can be: the power supply internal resistance ≤ 0.5Ω indicates normal. According to this power-on instruction, the station crimping module 2 is triggered to supply power to the electricity meter to be tested. That is, the station crimping module 2 injects corresponding voltage and current into the electricity meter to be tested through the built-in power supply device to achieve power supply, and can simulate the real working environment of the electricity meter to be tested.

[0039] After the power supply, in response to the test instruction, it synchronously acquires multi-channel voltage data and current data to generate test data and feedbacks the test data to the host computer module 1. The multi-channel voltage / current data includes main circuit voltage / data, transformer voltage data, relay operating voltage, and multiple electrical node data such as static power consumption current, load current, and short-circuit current. And the test time is recorded.

[0040] In this embodiment, a filtering algorithm is embedded in the automatic measurement and control module 3. The automatic measurement and control module 3 processes the multi-channel voltage data and current data by calling the corresponding filtering algorithm to generate test data. Among them, preferably, the embedded filtering algorithm is the Fourier algorithm. In some embodiments of the present invention, in order to achieve accurate acquisition and processing of voltage / current data, a corresponding integral operation algorithm is also embedded. It should be noted that after analyzing and processing the acquired voltage / current data through these algorithms, the automatic measurement and control module 3 further compares and analyzes the processed data with the standard rated voltage / current data defined by the electric energy meter to determine the test accuracy / error.

[0041] It should be understood that in some embodiments of the present invention, the automatic measurement and control module 3 can realize the automatic test of the main electrical performance of the printed circuit board of the single-phase fee-controlled meter of mainstream manufacturers through a serial asynchronous communication interface, such as the RS485 interface, and the special communication protocol DL645 of the electric energy meter.

[0042] Furthermore, the host computer module 1 calculates the electrical parameters of the electric energy meter to be tested according to the received test data and outputs fault information based on the calculation results. In the embodiment of the present invention, the host computer module 1 is also provided with an interaction interface connected to relevant software devices. Specifically, an interface for interacting with the fault analysis software is provided, which is used to call the corresponding algorithm to process and analyze the test data. Exemplarily, the fault analysis software in this embodiment includes a pre-trained fault prediction neural network model / electric energy meter life prediction neural network model. By inputting the test data into the retrieved prediction neural network model for processing, the corresponding prediction results can be obtained, that is, the model outputs fault information including the fault location, fault type, and equipment life information, and synchronously issues an instruction of "abort the test" to the automatic measurement and control module 3.

[0043] The host computer module 1 can also be provided with a filtering processing algorithm. Preferably, the wavelet denoising algorithm can adopt multi-resolution wavelet packet decomposition and adaptive threshold technology for transient noise (electromagnetic pulse, high-frequency harmonic) to improve the signal-to-noise ratio of the signal. That is, the effective signal in the test data is extracted by this filtering processing algorithm, and parameters such as the effective value and harmonic content are calculated. If the parameters exceed the preset parameter thresholds, the host computer module 1 will immediately issue an instruction of "abort the test" and mark the fault point (such as the failure of the relay to act).

[0044] In some embodiments of the present invention, the host computer module 1 may also be provided with an interface for interacting with the parameter configuration software, which is used to call the corresponding test items and parameter thresholds to generate test instructions. Specifically, these test items and parameter thresholds will be initialized and configured before the system runs the test. For example, the selected test item is the relay action test. The parameter thresholds include the threshold conditions for triggering the "abort test" instruction, the "power-on instruction", and the "crimping instruction", and will be adaptively called during the operation of these modules. Specifically, please refer to Figure 2 as shown in Figure 2 Figure 4 is a schematic diagram of the parameter configuration of a test item in one embodiment of the present invention.

[0045] The host computer module 1 is also provided with a display interface for real-time displaying the daily freeze data curve generated after processing and analyzing the test data, such as the daily freeze power analysis curve, and the load curve. This is convenient for relevant staff to intuitively understand the operating status of the internal parameters of the electricity meter to be tested. Specifically, the daily freeze power analysis curve can be referred to Figure 3 as shown in Figure 3 Figure 5 is a schematic diagram of the forward active total electric energy data curve of the daily freeze data in one embodiment of the present invention.

[0046] In the embodiment of the present invention, the system is also provided with a database module connected to the above three modules, which stores fault information and test data. For example, the host computer module 1 stores the fault analysis results (test time, fault type, accuracy error) in the database and generates the corresponding test report.

[0047] In summary, the embodiment of the present invention realizes the automatic test and fault analysis of the electrical performance of the electricity meter by coordinating the host computer module, the station crimping module, and the automatic measurement and control module; monitors the crimping state of the electricity meter by the station crimping module to reduce the error caused by poor contact during the test process; introduces a noise processing mechanism to efficiently collect the test data of multiple channels and multiple nodes by the automatic measurement and control module to reduce the signal noise interference, and calculates the electrical parameters of the electricity meter to be tested through the software and hardware combined host computer module to output accurate fault information. It significantly improves the test efficiency, has less error compared with manual work, and provides a reliable basis for the data electronic management of the electricity meter and the formulation of fault maintenance strategies.

[0048] An embodiment of the present invention provides a method for testing the fault of an electricity meter. Specifically, please refer to Figure 4 , Figure 4 Figure 6 shows a schematic diagram of the flow of the method for testing the fault of an electricity meter in one embodiment of the present invention, including:

[0049] S1. Fix the electricity meter to be tested at the station, determine the target test item through the host computer module and press the corresponding test button.

[0050] It should be understood that in this embodiment, a station fixture with a positioning slot can be used to ensure that the test points of the electricity meter to be tested are aligned with the probes. In the embodiments of the present invention, the test items cover various types of tests reflecting the performance of the electricity meter, and "full-item test" or "relay special test" can be selected.

[0051] S2. In response to the instructions issued by the host computer module, the station crimping module performs crimping at the test points of the electricity meter to be tested, and the automatic measurement and control module collects the voltage data and current data at the test points.

[0052] In this embodiment, if the crimping pressure exceeds the limit (such as pressure > 15 N), the test is immediately aborted and an alarm is given, prompting "probe jamming or test point offset".

[0053] S3. The host computer module analyzes and processes the voltage data and current data to generate a test report reflecting the fault information of the target test item.

[0054] S4. Formulate corresponding equipment maintenance strategies according to the test report and execute them.

[0055] Exemplarily, the equipment maintenance strategy can be strategies such as "replace the relay module" or "calibrate the voltage sampling circuit".

[0056] This embodiment gives the following example scenario to refine the entire invention solution: For example, this scenario is that harmonic pollution causes measurement errors.

[0057] Problem: The electricity consumption of the electricity meter in an industrial park has suddenly increased, and harmonic interference is suspected.

[0058] Test process: Execute a full-item test. By analyzing the output results of the host computer module and the automatic measurement and control module, it is shown that the harmonic ratio of the voltage signal of the electricity meter is 8%. It is determined as "harmonic exceeding the standard", and it is recommended to install a filtering device. Synchronously generate a power grid quality report and submit it to the power supply management department.

[0059] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A power meter fault test system, characterized in that The system includes a host computer module, a station crimping module, and an automatic measurement and control module that communicate with each other; The station crimping module is connected to the electricity meter to be tested, receives the crimping instruction issued by the host computer module, triggers the probe to crimp the test point, and synchronously feeds back the crimping status signal to the host computer module; The automatic measurement and control module receives the test instruction issued by the host computer module, starts the power supply, synchronously collects multi-channel voltage data and current data to generate test data, and feeds back the test data to the host computer module; The host computer module receives the crimping status signal. When it determines that the crimping status is correct, it issues the test instruction to the automatic measurement and control module. The host computer module calculates the electrical parameters of the electricity meter to be tested based on the received test data, and outputs fault information based on the calculation result; The fault information includes fault location, fault type, and equipment life information.

2. The electric energy meter fault test system according to claim 1, characterized in that, The station crimping module drives and adjusts the probe crimping position and force through a telescopic solenoid valve.

3. The electric energy meter fault test system according to claim 1, characterized in that, The station crimping module is embedded with a pressure sensor for feeding back the crimping status signal.

4. The electric energy meter fault test system according to claim 1, wherein, The host computer module is provided with an interface for interacting with the fault analysis software, which is used to call corresponding algorithms to process and analyze the test data, output the fault information, and synchronously issue an abort test instruction to the automatic measurement and control module.

5. The electricity meter fault test system according to claim 1, characterized in that, The host computer module displays the daily freeze data curve and load curve generated after processing and analyzing the test data in real time through the set display interface.

6. The electric energy meter fault test system according to claim 1, characterized in that The host computer module is provided with an interface for interacting with the parameter configuration software, which is used to call corresponding test items and parameter thresholds to generate the test instruction.

7. The electric energy meter fault test system according to claim 1, wherein The automatic measurement and control module is provided with an AD acquisition interface for collecting power parameter data. When the power parameter data meets the threshold condition, it sends a power-on instruction to the station crimping module to trigger the station crimping module to supply power to the electricity meter to be tested.

8. The electric energy meter fault test system according to claim 1, characterized in that The automatic measurement and control module is embedded with a filtering algorithm, and the automatic measurement and control module calls the filtering algorithm to process the multi-channel voltage data and current data.

9. The electric energy meter fault test system according to claim 1, characterized in that, The system further includes a database module for storing the fault information and the test data.

10. A method for testing the failure of an electric energy meter, characterized in that, Applied to the electricity meter fault test system as described in claims 1 to 9, it includes: Fix the electricity meter to be tested at the station, determine the target test item through the host computer module and press the corresponding test button; Distributively respond to the instruction issued by the host computer module, perform crimping at the test point of the electricity meter to be tested through the station crimping module, and collect the voltage data and current data at the test point through the automatic measurement and control module; Analyze and process the voltage data and current data through the host computer module to generate a test report reflecting the fault information of the target test item; Formulate corresponding equipment maintenance strategies according to the test report and execute them.

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