CN-122017355-A - Switching equipment loop resistance test system based on wireless synchronization technology

CN122017355ACN 122017355 ACN122017355 ACN 122017355ACN-122017355-A

Abstract

The invention discloses a switching equipment loop resistance test system based on a wireless synchronization technology, which relates to the technical field of loop resistance test and comprises a resistance test unit, a data acquisition unit, a test analysis unit and a resistance correction unit. Furthermore, when the resistance test unit is in a suspected use state, the resistance correction unit can dynamically compensate and correct an initial loop resistance calculation result according to a dynamic interference index and by combining specific contact pressure and humidity data through a preset correction formula, so that measurement errors caused by factors such as environmental interference and poor contact are effectively restrained, and the accuracy and reliability of final loop resistance data are greatly improved.

Inventors

HOU YANQUAN
ZHANG HAOQIANG
YAO YUE
LI WEI
SUN FENGXIAN
MENG XIANGPENG
ZHANG CHUNMING
ZHAO JUNTAO
DONG HONGKAI
WANG LEI

Assignees

国网黑龙江省电力有限公司七台河供电公司

Dates

Publication Date: 20260512
Application Date: 20251215

Claims (6)

1. The switching equipment loop resistance test system based on the wireless synchronization technology is characterized by comprising a resistance test unit, a data acquisition unit, a test analysis unit and a resistance correction unit; The resistance test unit comprises an adjustable power supply module and a voltage sampling module, wherein the adjustable power supply module is used for stably outputting direct current to a tested loop, the output current is changed in a remote adjustment mode, the voltage sampling module is used for collecting voltages at two ends of the tested loop at a preset sampling frequency, and the initial loop resistance of the switch equipment is calculated preliminarily according to ohm law through current and voltage data; The data acquisition unit is used for acquiring the use data and the contact data in the use process of the resistance test unit through the sensor array, sending the use data to the test analysis unit and sending the contact data to the resistance correction unit; The test analysis unit is used for receiving the use data, obtaining a dynamic interference index of the use state of the resistance test unit through analysis and calculation, and dividing the use state of the resistance test unit into a good use state, an in-doubt use state and a fault stop state; And the resistance correction unit is used for receiving the contact data and correcting the initial loop resistance by combining the dynamic interference index when the resistance test unit is in the doubtful use state.
2. The switching equipment loop resistance test system based on the wireless synchronization technology according to claim 1, further comprising a region dividing unit and a wireless synchronization unit, wherein the region dividing unit obtains the position of the switching equipment based on GIS positioning data to generate a power transmission line test topological graph, and the wireless synchronization unit adopts a high-precision clock synchronization protocol and combines the wireless communication technology to enable sampling clock deviation of all distributed test units to be controlled within a preset time range.
3. The switchgear circuit resistance testing system based on the wireless synchronization technology according to claim 1, wherein the sensor array comprises a temperature sensor, an electromagnetic intensity sensor, a power sensor, a pressure sensor and a contact surface humidity sensor, the usage data comprises the ambient temperature of the resistance testing unit, the electromagnetic intensity of the ambient environment of the resistance testing unit and the output power data of the adjustable power module, and the contact data comprises the contact pressure between the resistance testing unit and the switchgear to be tested and the contact surface humidity data between the resistance testing unit and the switchgear to be tested.
4. The switchgear loop resistance testing system based on wireless synchronization technology according to claim 1, wherein the dynamic interference index of the usage state of the resistance testing unit is calculated as follows: s11, acquiring the ambient temperature of the resistance test unit, the ambient electromagnetic intensity of the resistance test unit and the output power data of the adjustable power supply module, and analyzing and calculating; S12, calculating a dynamic interference index of the use state of the resistance test unit according to the following formula : , wherein, For the actual output power of the adjustable power supply module, For a preset rated output power, the output power is set, For the actual sampling frequency of the voltage sampling module, For the preset sampling frequency to be the same, For the ambient temperature around the resistance test unit, Is a temperature of the standard to be preset, For a preset maximum allowable temperature around the resistance test unit, Is the lowest allowable temperature around the preset resistance test unit, For the electromagnetic intensity of the environment surrounding the resistance test unit, For a preset maximum allowable electromagnetic strength around the resistance test unit, Is a weight coefficient of a preset temperature, A weight coefficient of the preset electromagnetic intensity; s13, acquiring a dynamic interference lower limit threshold And dynamic interference upper threshold Dynamic interference index with use state of resistance test unit Comparative analysis is performed when When the resistance test unit is in good use state, the use state of the resistance test unit is divided into good use state, the initially calculated initial loop resistance data of the switch equipment is accurate, the initial loop resistance is not required to be corrected, and the resistance correction unit is not triggered; S14, when When the initial loop resistance data of the switching equipment is calculated, the initial loop resistance data is marked as correctable data, and the resistance correction unit is triggered to correct the initial loop resistance; s15, when When the resistance test unit is in a fault stop state, a worker is immediately dispatched to overhaul the resistance test unit, and the initially calculated initial loop resistance data of the switch equipment is marked as unreliable data.
5. The switchgear loop resistance testing system based on wireless synchronization technology according to claim 1, wherein the process of correcting the initial loop resistance is as follows: S21, acquiring contact pressure of the resistance test unit and the switch equipment to be tested and humidity data of a contact surface of the resistance test unit and the switch equipment to be tested, and carrying out analysis and calculation by combining with a dynamic interference index; s22, calculating the corrected loop resistance according to the following formula : Wherein, the For the initial loop resistance of the switching device, Dynamic interference index for the state of use of the resistance test unit, For the contact pressure of the resistance test unit with the switching device to be tested, For a preset maximum contact pressure, For a preset minimum contact pressure, For the humidity of the contact surface of the resistance test unit and the switch equipment to be tested, Is the preset maximum contact surface humidity.
6. The switching equipment loop resistance testing system based on the wireless synchronization technology according to claim 1, wherein the resistance testing unit, the data acquisition unit, the test analysis unit, the resistance correction unit and the area dividing unit are all connected in a communication mode through the wireless synchronization unit, data interaction and clock synchronization are achieved, and acquired data and information obtained through analysis are sent to a loop resistance testing terminal.

Description

Switching equipment loop resistance test system based on wireless synchronization technology Technical Field The invention relates to the technical field of loop resistance testing, in particular to a switching equipment loop resistance testing system based on a wireless synchronization technology. Background The switching equipment is core equipment for bearing circuit on-off, fault isolation and safety protection in the power system, is widely applied to various links such as power generation, power transmission, power distribution and the like, and the running state of the switching equipment directly determines the stability and the power supply reliability of the power system. The loop resistance is used as a key index for reflecting the conductivity and the contact state of the switching equipment, the numerical value of the loop resistance is closely related to the operation safety of the equipment, if the loop resistance exceeds the standard, the local loss is increased and the temperature is abnormally increased in the current transmission process, so that serious problems of equipment insulation aging, contact ablation, fault tripping and the like are caused, economic loss is caused, and the personal safety of operation and maintenance personnel is possibly threatened. Therefore, the circuit resistance of the switch equipment is accurately tested at regular intervals, so that the circuit resistance testing device is an important technical means for timely finding potential defects of the equipment, guaranteeing the power transmission efficiency and preventing safety accidents, and has irreplaceable practical significance for scientific operation and safety operation of a power system. However, the conventional loop resistance test of the switchgear mostly adopts a mode of combining wired connection with manual operation, the wiring of the mode is complicated and is obviously limited by a test site, the manual control test flow is easy to have operation errors, and meanwhile, an efficient synchronization mechanism is lacked, the test efficiency is low and the data accuracy is difficult to guarantee. In view of the technical drawbacks described above, solutions are now proposed. Disclosure of Invention The invention aims to solve the problems that the traditional switch equipment loop resistance test mostly adopts a mode of combining wired connection with manual operation, the wiring of the mode is complicated and is obviously limited by a test site, the manual control test flow is easy to have operation errors, and meanwhile, an efficient synchronization mechanism is lacked, the test efficiency is low and the data accuracy is difficult to guarantee. In order to achieve the aim, the invention adopts the following technical scheme that the switch equipment loop resistance test system based on the wireless synchronization technology comprises a resistance test unit, a data acquisition unit, a test analysis unit and a resistance correction unit; The resistance test unit comprises an adjustable power supply module and a voltage sampling module, wherein the adjustable power supply module is used for stably outputting direct current to a tested loop, the output current is changed in a remote adjustment mode, the voltage sampling module is used for collecting voltages at two ends of the tested loop at a preset sampling frequency, and the initial loop resistance of the switch equipment is calculated preliminarily according to ohm law through current and voltage data; The data acquisition unit is used for acquiring the use data and the contact data in the use process of the resistance test unit through the sensor array, sending the use data to the test analysis unit and sending the contact data to the resistance correction unit; The test analysis unit is used for receiving the use data, obtaining a dynamic interference index of the use state of the resistance test unit through analysis and calculation, and dividing the use state of the resistance test unit into a good use state, an in-doubt use state and a fault stop state; And the resistance correction unit is used for receiving the contact data and correcting the initial loop resistance by combining the dynamic interference index when the resistance test unit is in the doubtful use state. Furthermore, the system also comprises a region dividing unit and a wireless synchronization unit, wherein the region dividing unit acquires the position of the switch equipment based on GIS positioning data to generate a power transmission line test topological graph, and the wireless synchronization unit adopts a high-precision clock synchronization protocol and combines a wireless communication technology to control sampling clock deviation of all distributed test units within a preset time range. Still further, the sensor array includes temperature sensor, electromagnetic intensity sensor, power sensor, pressure sensor and contact surface humidity sensor, the use data