Zêdetkirina Pêşkêşbazên Rewşa Dabeqandina: Piramendan Yekî Zêde yên Ji Bia Çavkaniyê, Têkiliya Xerabdar û Dewamiyê
1 Împortanciya Mînîtrayê Online ya Vaxtîna Şûrşî
1.1 Bêdilîn Cihazan Sisteman Elektrîk, Redûkirina Zararên Lîghtîng
Dema lîghtîng vaxtîna şûrşî yên vaxtîna şûrşî reyek bixweber dibe ku overvoltage têkeve. Mînîtrayên online stabîlîya şûrşîyan dîsa, heste potensiyel ên sereka di dema heyî de destnîşan dîsa û alarmên ji bo xebitina tevlîbîna têkeve—ji bo redûkirina zararên lîghtîng ên bi rêjeya cihanên elektrîk û sisteman û bêdilîna şevirinê.
1.2 Mînîtrayê Di Dema Heyî De, Pêşketinê Baxta
Mînîtrayên key parametreyan (wêgê, current ên leakage) di dema heyî de pêşketin dîsa. Bi destnîşandina heste potensiyel ên sereka û herîsana avakatên din, wan planên baxtanîn çend bikin, keseyên nebes nîne û bexwaşên amanîn jî berdest bikin—ji bo bêdilîna sistem û efektivîteya.
2 Prinsîpên Cihazên Testiye Mînîtrayê Online
2.1 Acquisition Signal
Mînîtrayên signalan bi qonexên şûrşîyan têkeve. Dema operasyonê normal, şûrşîyan stabîl in; dema overvoltage (lîghtîng/switching), wan aktivizan bi tenê energy discharge. Mînîtrayên bi sensoran du parametrekeyan herîser dikin:
2.2 Signal Processing & Analysis
Signals collected bi three key modules processing:
Processed digital signals by microprocessors/chips, focusing on:
3 Deficiencies of Traditional Test Devices
3.1 Low Testing Precision
Analog - based signal processing is vulnerable to interference (e.g., noise masking small leakage current changes). Sensor accuracy and signal conditioning circuits further impact precision, reducing data reliability.
3.2 Limited Functionality
Traditional devices only test basic parameters (leakage current, operation count) but lack advanced features (fault diagnosis, data analytics), making it hard to detect hidden risks comprehensively.
3.3 Complex Operations
Testing requires cumbersome wiring (e.g., sensor installation, signal connections) and unfriendly interfaces, increasing user error risks and operational difficulty.
3.4 Poor Reliability
Mechanical components (e.g., switches prone to wear, poor contact) and analog circuits (sensitive to temperature/humidity) cause frequent failures. Maintenance demands specialized skills, raising costs and complexity.
Traditional device structures and defects can be visualized in Figure 1.
4 Improvement Measures for Surge Arrester Online Monitor Test Devices
4.1 Adopt Digital Signal Processing Technology
Digital signal processing technology boasts advantages such as strong anti - interference capability, high precision, and good stability. Applying it to the surge arrester online monitor test device can effectively enhance test accuracy and stability. For example, digital filtering technology can accurately remove noise interference in signals, significantly optimizing signal quality; digital signal processing algorithms can precisely calculate key parameters like leakage current and operation times, further improving test precision.
4.2 Add Functional Modules
To meet users’ demands for advanced functions of surge arrester online monitor test devices, the improved device adds functional modules such as fault diagnosis and data analysis. By analyzing parameters like leakage current and operation times, potential fault hazards of surge arresters can be accurately identified; statistical analysis of historical data helps clearly grasp the operation trend of arresters, providing reliable basis for preventive maintenance.
4.3 Optimize the Operation Interface
To improve the convenience of operating the surge arrester online monitor test device, the operation interface is optimized. For instance, touch - screen technology is introduced, allowing users to complete operations and parameter settings directly via touch; a graphical interface enables users to intuitively understand test results and device status, enhancing the operation experience.
4.4 Enhance Reliability
4.4.1 Modular Design
Adopt a modular design approach, dividing the test device into multiple independent modules. Each module can work separately, greatly reducing maintenance and repair difficulties and improving the device’s maintainability.
4.4.2 High - Quality Components and Materials
Select high - quality components and materials to ensure the stability and reliability of the test device at the hardware level, reducing issues caused by hardware failures.
4.4.3 Strict Quality Control
Implement strict quality control and testing procedures to comprehensively inspect the performance and quality of the test device, ensuring it meets design and usage requirements and laying a solid foundation for stable device operation.
The schematic diagram of the improved surge arrester online monitor test device is shown in Figure 2.
5 Case Analysis
5.1 Case Introduction
A set of surge arresters in a substation was selected as the test object. The improved test device was used to conduct comprehensive tests, including measuring parameters such as leakage current, operation count, and resistive current, as well as verifying functions like fault diagnosis and data analysis.
5.2 Test Process and Results
5.2.1 Leakage Current Test
The improved device measured the arrester’s leakage current, which remained stable within the normal range with no significant deviation from historical data. This indicates good insulation performance, with no abnormal increase in leakage current.
5.2.2 Operation Count Test
By simulating arrester operations, the improved device accurately recorded operation counts, matching actual actions. This confirms the device’s capability to provide reliable data for operation and maintenance.
5.2.3 Resistive Current Test
Resistive current measurements (via the improved device) stayed within normal ranges, consistent with historical data. This reflects normal resistive components, with no signs of aging or damage.
5.2.4 Fault Diagnosis Verification
By simulating faults (e.g., sensor malfunctions, signal conditioning circuit issues), the improved device accurately detected fault points and provided clear alerts. This verifies the reliability of its fault diagnosis function for timely defect identification.
5.2.5 Data Analysis Verification
Analyzing historical arrester data, the improved device generated trend charts for parameters (leakage current, operation count) and detailed reports. This demonstrates robust data analysis capabilities, supporting scientific operation and maintenance decisions.
5.3 Result Analysis
The improved test device features high precision, comprehensive functions, user - friendly operation, and strong reliability—fully meeting testing requirements for surge arrester online monitors.
Its fault diagnosis and data analysis capabilities enable proactive identification of potential issues, enhancing equipment reliability and safety. Overall, the device improves testing efficiency and accuracy, safeguarding the stable operation of power systems.
6 Conclusion
As power systems evolve, demands for accuracy and reliability of surge arrester online monitors continue to rise. This paper introduces improvements to test devices—optimizing signal acquisition, processing, control, display, and power modules—to enhance stability and precision.
Field tests validate the device’s effectiveness, providing a reliable basis for quality inspection of online arrester monitors. Future efforts should focus on advancing power equipment detection technologies, continuously refining test devices to further ensure the safe and stable operation of power systems.
