Switch equipment loop resistance test system based on wireless synchronization technology
By utilizing wireless synchronization technology and a high-precision clock synchronization protocol, combined with sensor arrays and data acquisition units, efficient and accurate testing of the circuit resistance of switching equipment is achieved. This solves the problems of low efficiency and insufficient data accuracy in traditional testing systems and provides real-time health monitoring of all network devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD QITAIHE POWER SUPPLY CO
- Filing Date
- 2025-12-15
- Publication Date
- 2026-05-12
AI Technical Summary
In traditional switchgear loop resistance testing systems, existing technologies struggle to achieve efficient and automated wireless synchronization technology for switchgear loop resistance testing. This new system solves the problem that existing technologies cannot achieve in traditional switchgear loop resistance testing.
A switchgear loop resistance testing system based on wireless synchronization technology is proposed. The system adopts wireless synchronization technology and a high-precision clock synchronization protocol to achieve high-precision synchronization of distributed test units through wireless communication technology. Combined with sensor arrays and data acquisition units, it collects multi-dimensional data in real time and performs intelligent evaluation and correction, generating a visualized test topology map to achieve remote, real-time monitoring and data correction.
It significantly improves testing efficiency and data accuracy, eliminates data asynchrony issues caused by clock skew, enhances the reliability of the testing process and the accuracy of the data, and provides real-time monitoring capabilities for the health status of all network switching equipment.
Smart Images
Figure CN122017355A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of loop resistance testing technology, and in particular to a loop resistance testing system for switchgear based on wireless synchronization technology. Background Technology
[0002] Switchgear is the core equipment in a power system responsible for circuit switching, fault isolation, and safety protection. It is widely used in power generation, transmission, and distribution, and its operating status directly determines the stability and reliability of the power system. Loop resistance, a key indicator reflecting the conductivity and contact condition of switchgear, is closely related to operational safety. Excessive loop resistance can lead to increased local losses and abnormal temperature rises during current transmission, resulting in serious problems such as insulation aging, contact erosion, and even fault tripping. This not only causes economic losses but may also threaten the personal safety of maintenance personnel. Therefore, regularly and accurately testing the loop resistance of switchgear is a crucial technical means to promptly detect potential defects, ensure power transmission efficiency, and prevent safety accidents. It has irreplaceable practical significance for the scientific operation and safe maintenance of power systems.
[0003] However, traditional circuit resistance testing of switching equipment often uses a combination of wired connection and manual operation. This method is cumbersome in terms of wiring and is significantly limited by the test site. Manual control of the test process is prone to operational errors, and it lacks an efficient synchronization mechanism, resulting in low test efficiency and difficulty in guaranteeing data accuracy.
[0004] To address the aforementioned technical deficiencies, a solution is proposed. Summary of the Invention
[0005] The purpose of this invention is to solve the problems of traditional switching equipment circuit resistance testing, which mostly uses wired connection combined with manual operation. This method is cumbersome in terms of wiring and is significantly limited by the test site. Manual control of the test process is prone to operational errors. At the same time, it lacks an efficient synchronization mechanism, resulting in low test efficiency and difficulty in guaranteeing data accuracy.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a switching equipment loop resistance testing system based on wireless synchronization technology, comprising a resistance testing unit, a data acquisition unit, a test analysis unit, and a resistance correction unit; The resistance testing unit includes an adjustable power supply module and a voltage sampling module. The adjustable power supply module is used to stably output DC current to the circuit under test and change the magnitude of the output current through remote adjustment. The voltage sampling module is used to collect the voltage across the circuit under test at a preset sampling frequency and, based on Ohm's law, preliminarily calculate the initial circuit resistance of the switching device using the current and voltage data. The data acquisition unit is used to collect usage data and contact data during the use of the resistance test unit through the sensor array, and sends the usage data to the test analysis unit and the contact data to the resistance correction unit. The test analysis unit is used to receive usage data, analyze and calculate the dynamic interference index of the resistance test unit's usage status, and classify the usage status of the resistance test unit into good usage status, questionable usage status, and fault stop status. The resistance correction unit is used to receive contact data and, in conjunction with the dynamic interference index, correct the initial circuit resistance when the resistance test unit is in a questionable state.
[0007] Furthermore, the system also includes a region division unit and a wireless synchronization unit. The region division unit obtains the location of the switching equipment based on GIS positioning data and generates a test topology map of the transmission line. The wireless synchronization unit adopts a high-precision clock synchronization protocol and combines it with wireless communication technology to control the sampling clock deviation of all distributed test units within a preset time range.
[0008] Furthermore, the sensor array includes a temperature sensor, an electromagnetic intensity sensor, a power sensor, a pressure sensor, and a contact surface humidity sensor. The usage data includes the ambient temperature around the resistance testing unit, the electromagnetic intensity around the resistance testing unit, and the output power data of the adjustable power module. The contact data includes the contact pressure between the resistance testing unit and the switch under test, and the humidity data of the contact surface between the resistance testing unit and the switch under test.
[0009] Furthermore, the calculation process for the dynamic interference index of the resistance test unit under operating conditions is as follows: S11. Acquire and analyze data on ambient temperature, electromagnetic intensity, and output power of the adjustable power module around the resistance test unit. S12. Calculate the dynamic interference index of the resistance test unit under operating conditions according to the following formula. : , in, This represents the actual output power of the adjustable power module. The preset rated output power, This is the actual sampling frequency of the voltage sampling module. To preset the sampling frequency, The ambient temperature surrounding the resistance testing unit. The preset standard temperature, This is the preset maximum allowable temperature around the resistance test unit. This is the preset minimum permissible temperature around the resistance test unit. The electromagnetic intensity of the environment surrounding the resistance testing unit. The maximum permissible electromagnetic intensity around the preset resistance test unit. The preset weighting coefficient for temperature. The preset weighting coefficient for electromagnetic intensity; S13. Obtain the lower limit threshold of dynamic interference. and dynamic interference upper limit threshold Dynamic interference index related to the usage status of the resistance test unit Comparative analysis, when If the resistance test unit is in good working order, the resistance test unit is classified as being in good working order. The initial circuit resistance data of the switchgear calculated in the preliminary calculation is accurate. There is no need to correct the initial circuit resistance and the resistance correction unit will not be triggered. S14, when If the resistance test unit is in a normal operating condition, it will be classified as a questionable operating condition. The initial circuit resistance data of the switchgear calculated in the preliminary calculation has an error and is marked as correctable data. This will trigger the resistance correction unit to correct the initial circuit resistance. S15, when If the resistance testing unit is in a poor working condition, it will be classified as a fault-stopped state. If the resistance testing unit is faulty, staff will be dispatched immediately to repair it, and the initially calculated initial circuit resistance data of the switching equipment will be marked as unreliable data.
[0010] Furthermore, the process of correcting the initial loop resistance is as follows: S21. Obtain the contact pressure between the resistance testing unit and the switch device under test, as well as the humidity data of the contact surface between the resistance testing unit and the switch device under test, and analyze and calculate them in conjunction with the dynamic interference index. S22. Calculate the corrected loop resistance according to the following formula. : ,in, The initial circuit resistance of the switching equipment. This represents the dynamic interference index of the resistance test unit under operating conditions. The contact pressure between the resistance testing unit and the switchgear under test. The preset maximum contact pressure, The preset minimum contact pressure, The humidity of the contact surface between the resistance testing unit and the switch device under test. This is the preset maximum humidity of the contact surface.
[0011] Furthermore, the resistance testing unit, data acquisition unit, test analysis unit, resistance correction unit, and area division unit all establish a communication connection through a wireless synchronization unit to achieve data interaction and clock synchronization, and send the acquired data and analyzed information to the loop resistance testing terminal.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This switchgear loop resistance testing system, based on wireless synchronization technology, achieves high-precision synchronization of sampling clocks across all distributed test units through a wireless synchronization unit and a high-precision clock synchronization protocol and wireless communication technology. This effectively eliminates data acquisition asynchrony caused by clock deviations, significantly improving data consistency and overall testing efficiency in multi-node collaborative testing. Secondly, through an integrated data acquisition unit and sensor array, it can collect multi-dimensional data in real time, including ambient temperature, electromagnetic intensity, power output, contact pressure, and humidity. The test analysis unit calculates the dynamic interference index, enabling intelligent evaluation and grading of the resistance test unit's operating status (good, questionable, faulty). This not only enhances the monitoring capability of the testing process reliability but also provides a scientific basis for subsequent data correction. Furthermore, when a resistance test unit is in a questionable state, the resistance correction unit can dynamically compensate and correct the initial loop resistance calculation results based on the dynamic interference index and specific contact pressure and humidity data using a preset correction formula. This effectively suppresses measurement errors introduced by environmental interference and poor contact, greatly improving the accuracy and reliability of the final loop resistance data. In addition, the system integrates GIS positioning data through regional division units to generate a visualized transmission line test topology map, and marks the test status and results. Combined with wireless communication, the data is sent to the test terminal, enabling maintenance personnel to remotely, in real time and intuitively grasp the loop resistance status of the entire network switchgear and the health status of the test units. Attached Figure Description
[0013] Figure 1 A schematic diagram of the system flow of the present invention is shown. Detailed Implementation
[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0015] Examples, such as Figure 1As shown, a switchgear loop resistance testing system based on wireless synchronization technology is described. First, the resistance testing unit includes an adjustable power supply module and a voltage sampling module. The adjustable power supply module is used to stably output DC current to the circuit under test. The output current can be changed remotely to meet different testing requirements. The voltage sampling module is used to collect the voltage across the circuit under test at a preset sampling frequency (1kHz). Based on Ohm's law, the initial loop resistance of the switchgear is initially calculated using the current and voltage data.
[0016] Then, the data acquisition unit uses the sensor array to collect usage data and contact data during the use of the resistance test unit, and sends the usage data to the test analysis unit and the contact data to the resistance correction unit. It should be noted that the sensor array includes a temperature sensor, an electromagnetic intensity sensor, a power sensor, a pressure sensor, and a contact surface humidity sensor. The usage data includes the ambient temperature around the resistance test unit, the electromagnetic intensity around the resistance test unit, and the output power data of the adjustable power module. The contact data includes the contact pressure between the resistance test unit and the switch under test, and the humidity data of the contact surface between the resistance test unit and the switch under test.
[0017] Then, the test analysis unit receives the usage data, and through analysis and calculation, the dynamic interference index of the resistance test unit's usage status is obtained, and the usage status of the resistance test unit is divided into good usage status, questionable usage status, and fault stop status. The calculation process for the dynamic interference index of the resistance test unit under operating conditions is as follows: S11. Acquire and analyze data on ambient temperature, electromagnetic intensity, and output power of the adjustable power module around the resistance test unit. S12. Calculate the dynamic interference index of the resistance test unit under operating conditions according to the following formula. : , in, This represents the actual output power of the adjustable power module. The preset rated output power, This is the actual sampling frequency of the voltage sampling module. To preset the sampling frequency, The ambient temperature surrounding the resistance testing unit. The preset standard temperature, This is the preset maximum allowable temperature around the resistance test unit. This is the preset minimum permissible temperature around the resistance test unit. The electromagnetic intensity of the environment surrounding the resistance testing unit. The maximum permissible electromagnetic intensity around the preset resistance test unit. The preset weighting coefficient for temperature. The preset weighting coefficient for electromagnetic intensity; S13. Obtain the lower limit threshold of dynamic interference. and dynamic interference upper limit threshold Dynamic interference index related to the usage status of the resistance test unit Comparative analysis, when If the resistance test unit is in good working order, the resistance test unit is classified as being in good working order. The initial circuit resistance data of the switchgear calculated in the preliminary calculation is accurate. There is no need to correct the initial circuit resistance and the resistance correction unit will not be triggered. S14, when If the resistance test unit is in a normal operating condition, it will be classified as a questionable operating condition. The initial circuit resistance data of the switchgear calculated in the preliminary calculation has an error and is marked as correctable data. This will trigger the resistance correction unit to correct the initial circuit resistance. S15, when If the resistance testing unit is in a poor working condition, it will be classified as a fault-stopped state. If the resistance testing unit is faulty, staff will be dispatched immediately to repair it, and the initially calculated initial circuit resistance data of the switching equipment will be marked as unreliable data.
[0018] Finally, the resistance correction unit receives contact data and combines it with the dynamic interference index to correct the initial circuit resistance when the resistance test unit is in a questionable state.
[0019] The process of correcting the initial loop resistance is as follows: S21. Obtain the contact pressure between the resistance testing unit and the switch device under test, as well as the humidity data of the contact surface between the resistance testing unit and the switch device under test, and analyze and calculate them in conjunction with the dynamic interference index. S22. Calculate the corrected loop resistance according to the following formula. : , in, The initial circuit resistance of the switching equipment. This represents the dynamic interference index of the resistance test unit under operating conditions. The contact pressure between the resistance testing unit and the switchgear under test. The preset maximum contact pressure, The preset minimum contact pressure, The humidity of the contact surface between the resistance testing unit and the switch device under test. The maximum contact surface humidity is preset. Then, the location of the switching equipment is obtained based on GIS positioning data through area division units, a transmission line test topology map is generated, and the usage status of the resistance test unit of the corresponding switching equipment and the loop resistance are marked on the topology map for easy viewing by staff.
[0020] It should be further noted that the resistance testing unit, data acquisition unit, test analysis unit, resistance correction unit, and area division unit all establish communication connections through the wireless synchronization unit to achieve data exchange and clock synchronization. The acquired data and analyzed information are then sent to the loop resistance testing terminal, allowing personnel to monitor the loop resistance of the switchgear under test in real time. The wireless synchronization unit employs the IEEE 1588 PTP high-precision clock synchronization protocol, combined with Wi-Fi 6 wireless communication technology, ensuring that the sampling clock deviation of all distributed testing units is controlled within a preset time (10ns).
[0021] This invention utilizes a wireless synchronization unit and employs a high-precision clock synchronization protocol and wireless communication technology to achieve high-precision synchronization of sampling clocks across all distributed test units. This effectively eliminates data acquisition asynchrony issues caused by clock deviations, significantly improving data consistency and overall testing efficiency in multi-node collaborative testing. Secondly, through an integrated data acquisition unit and sensor array, it can collect multi-dimensional data in real time, including ambient temperature, electromagnetic intensity, power output, contact pressure, and humidity. The test analysis unit calculates the dynamic interference index, enabling intelligent evaluation and grading of the resistance test unit's operating status (good, questionable, faulty). This not only enhances the monitoring capability of the testing process's reliability but also provides a scientific basis for subsequent data correction. Furthermore, when a resistance test unit is in a questionable state, the resistance correction unit can dynamically compensate and correct the initial loop resistance calculation results based on the dynamic interference index and specific contact pressure and humidity data using a preset correction formula. This effectively suppresses measurement errors introduced by environmental interference and poor contact, greatly improving the accuracy and reliability of the final loop resistance data. In addition, the system integrates GIS positioning data through regional division units to generate a visualized transmission line test topology map, and marks the test status and results. Combined with wireless communication, the data is sent to the test terminal, enabling maintenance personnel to remotely, in real time and intuitively grasp the loop resistance status of the entire network switchgear and the health status of the test units.
[0022] The size of the interval and threshold is set to facilitate comparison. The size of the threshold depends on the amount of sample data and the number of bases set by those skilled in the art for each set of sample data; as long as it does not affect the ratio between the parameter and the quantized value.
[0023] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation. The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A circuit resistance testing system for switching equipment based on wireless synchronization technology, characterized in that, It includes a resistance testing unit, a data acquisition unit, a test analysis unit, and a resistance correction unit; The resistance testing unit includes an adjustable power supply module and a voltage sampling module. The adjustable power supply module is used to stably output DC current to the circuit under test and change the magnitude of the output current through remote adjustment. The voltage sampling module is used to collect the voltage across the circuit under test at a preset sampling frequency and, based on Ohm's law, preliminarily calculate the initial circuit resistance of the switching device using the current and voltage data. The data acquisition unit is used to collect usage data and contact data during the use of the resistance test unit through the sensor array, and sends the usage data to the test analysis unit and the contact data to the resistance correction unit. The test analysis unit is used to receive usage data, analyze and calculate the dynamic interference index of the resistance test unit's usage status, and classify the usage status of the resistance test unit into good usage status, questionable usage status, and fault stop status. The resistance correction unit is used to receive contact data and, in conjunction with the dynamic interference index, correct the initial circuit resistance when the resistance test unit is in a questionable state.
2. The switching equipment loop resistance testing system based on wireless synchronization technology according to claim 1, characterized in that, The system also includes a region division unit and a wireless synchronization unit. The region division unit obtains the location of the switching equipment based on GIS positioning data and generates a test topology map of the transmission line. The wireless synchronization unit adopts a high-precision clock synchronization protocol and combines it with wireless communication technology to control the sampling clock deviation of all distributed test units within a preset time range.
3. The switching equipment loop resistance testing system based on wireless synchronization technology according to claim 1, characterized in that, The sensor array includes a temperature sensor, an electromagnetic intensity sensor, a power sensor, a pressure sensor, and a contact surface humidity sensor. The usage data includes the ambient temperature around the resistance testing unit, the electromagnetic intensity around the resistance testing unit, and the output power data of the adjustable power module. The contact data includes the contact pressure between the resistance testing unit and the switch under test, and the humidity data of the contact surface between the resistance testing unit and the switch under test.
4. The switching equipment loop resistance testing system based on wireless synchronization technology according to claim 1, characterized in that, The calculation process for the dynamic interference index of the resistance test unit under operating conditions is as follows: S11. Acquire and analyze data on ambient temperature, electromagnetic intensity, and output power of the adjustable power module around the resistance test unit. S12. Calculate the dynamic interference index of the resistance test unit under operating conditions according to the following formula. : , in, This represents the actual output power of the adjustable power module. The preset rated output power, This is the actual sampling frequency of the voltage sampling module. To preset the sampling frequency, The ambient temperature surrounding the resistance testing unit. The preset standard temperature, This is the preset maximum allowable temperature around the resistance test unit. This is the preset minimum permissible temperature around the resistance test unit. The electromagnetic intensity of the environment surrounding the resistance testing unit. The maximum permissible electromagnetic intensity around the preset resistance test unit. The preset weighting coefficient for temperature. The preset weighting coefficient for electromagnetic intensity; S13. Obtain the lower limit threshold of dynamic interference. and dynamic interference upper limit threshold Dynamic interference index related to the usage status of the resistance test unit Comparative analysis, when If the resistance test unit is in good working order, the resistance test unit is classified as being in good working order. The initial circuit resistance data of the switchgear calculated in the preliminary calculation is accurate. There is no need to correct the initial circuit resistance and the resistance correction unit will not be triggered. S14, when If the resistance test unit is in a normal operating condition, it will be classified as a questionable operating condition. The initial circuit resistance data of the switchgear calculated in the preliminary calculation has an error and is marked as correctable data. This will trigger the resistance correction unit to correct the initial circuit resistance. S15, when If the resistance testing unit is in a poor working condition, it will be classified as a fault-stopped state. If the resistance testing unit is faulty, staff will be dispatched immediately to repair it, and the initially calculated initial circuit resistance data of the switching equipment will be marked as unreliable data.
5. The switching equipment loop resistance testing system based on wireless synchronization technology according to claim 1, characterized in that, The process of correcting the initial loop resistance is as follows: S21. Obtain the contact pressure between the resistance testing unit and the switch device under test, as well as the humidity data of the contact surface between the resistance testing unit and the switch device under test, and analyze and calculate them in conjunction with the dynamic interference index. S22. Calculate the corrected loop resistance according to the following formula. : in, The initial circuit resistance of the switching equipment. This represents the dynamic interference index of the resistance test unit under operating conditions. The contact pressure between the resistance testing unit and the switchgear under test. The preset maximum contact pressure, The preset minimum contact pressure, The humidity of the contact surface between the resistance testing unit and the switch device under test. This is the preset maximum humidity of the contact surface.
6. The switching equipment loop resistance testing system based on wireless synchronization technology according to claim 1, characterized in that, The resistance testing unit, data acquisition unit, test analysis unit, resistance correction unit, and area division unit all establish a communication connection through a wireless synchronization unit to achieve data interaction and clock synchronization, and send the acquired data and analyzed information to the loop resistance testing terminal.