CN-122017325-A - Method, device, equipment and medium for identifying charged state of pole tower

CN122017325ACN 122017325 ACN122017325 ACN 122017325ACN-122017325-A

Abstract

The invention discloses a method, a device, equipment and a medium for identifying the electrified state of a pole tower, which belong to the field of power systems, and the method comprises the steps of determining an initial sampling period according to the total amount of currently available energy of the pole tower, and collecting the electric field intensity, leakage inductance current and line harmonic characteristics of the pole tower according to the initial sampling period; and finally, dynamically adjusting the sampling period based on the identification result to realize the self-adaptive adjustment of the sampling period. Therefore, by implementing the invention, the problem that the identification of the electrified state of the tower is difficult to realize while the low power consumption is maintained in the prior art can be solved.

Inventors

HAO FANGZHOU
LI XUECHAO
TANG YAO
LUO QI
LI SHIBO
HUANG WENKAI
WU JIANGWEI
WANG SHAOHUA
CHEN SHUHUA
Xie Shusong
HU JIAMING
LUO JIAJIAN

Assignees

广东电网有限责任公司广州供电局

Dates

Publication Date: 20260512
Application Date: 20260225

Claims (10)

1. A method for identifying a charged state of a tower, comprising: acquiring first electric field intensity, first leakage inductance current amplitude and first line harmonic characteristics corresponding to each first sampling time point of the tower according to an initial sampling period, wherein the initial sampling period is determined according to the total current available energy of the tower; according to the first electric field intensity and the first leakage inductance current amplitude, calculating to obtain a first electric field change rate and a first current change rate corresponding to the first sampling time points, and determining a first comprehensive mutation sensitivity judgment value corresponding to the first sampling time points according to the first electric field change rate and the first current change rate; Traversing the first comprehensive mutation sensitivity judgment value corresponding to each first sampling time point in sequence according to the time sequence to obtain an initial electrified state identification result of the tower corresponding to each first sampling time point; And adjusting the initial sampling period based on each initial charged state identification result to obtain a target sampling period, so as to continuously obtain second electric field intensity, second leakage inductance current amplitude and second line harmonic characteristics of the tower corresponding to each second sampling time point based on the target sampling period, and further determine a target charged state identification result of the tower corresponding to each second sampling time point.
2. The method for identifying a charging state of a tower according to claim 1, wherein said adjusting the initial sampling period based on each of the initial charging state identification results to obtain a target sampling period comprises: If the initial charging state identification result of the continuous first preset times is charged, adjusting the initial sampling period according to a first preset shortening coefficient to obtain a first sampling period, and taking the first sampling period as the target sampling period; and if the initial charging state identification result of the continuous first preset times is non-charging, adjusting the initial sampling period according to a first preset increase coefficient to obtain a second sampling period, and taking the second sampling period as the target sampling period.
3. The method for identifying a charging state of a tower according to claim 2, wherein the adjusting the initial sampling period according to the first preset shortening coefficient to obtain a first sampling period includes: multiplying the initial sampling period by the first preset shortening coefficient to obtain a third sampling period; if the third sampling period is smaller than or equal to the preset sampling period lower bound, determining the value of the first sampling period as the preset sampling period lower bound, otherwise, determining the value of the first sampling period as the third sampling period.
4. The method for identifying a charging state of a tower according to claim 2, wherein the adjusting the initial sampling period according to the first preset increase coefficient to obtain the second sampling period includes: Multiplying the initial sampling period by the first preset increase coefficient to obtain a fourth sampling period; and if the fourth sampling period is greater than or equal to a preset sampling period lower bound, determining the value of the second sampling period as a preset sampling period upper bound, otherwise, determining the value of the second sampling period as the fourth sampling period.
5. A method of identifying a charging status of a pole as claimed in claim 1, wherein said initial sampling period is determined based on a current total amount of energy available to said pole, comprising: acquiring the total amount of currently available energy of the tower, the energy consumed by single sampling and the expected working period; dividing the energy consumed by the single sampling by the total amount of currently available energy to obtain a first ratio, and multiplying the first ratio by an expected working period to obtain the initial sampling period.
6. The method for identifying a charging state of a tower according to claim 1, wherein determining a first integrated mutation-sensitivity determination value corresponding to each of the first sampling time points according to each of the first electric field change rates and each of the first current change rates comprises: multiplying a preset electric field change rate weight factor and a first electric field change rate corresponding to each first sampling time point in sequence to obtain a first multiplication value corresponding to each first sampling time point; Multiplying a preset current change rate weight factor and a first current change rate corresponding to each first sampling time point in sequence to obtain a second multiplication corresponding to each first sampling time point; and sequentially adding the first multiplication value and the second multiplication value corresponding to each first sampling time point to obtain a first comprehensive mutation sensitivity judgment value corresponding to each first sampling time point.
7. The method for identifying a charging state of a tower according to claim 1, wherein traversing the first comprehensive mutation sensitivity judgment values corresponding to the first sampling time points in sequence according to a time sequence to obtain an initial charging state identification result of the tower corresponding to the first sampling time points comprises: Traversing the first comprehensive mutation sensitivity judgment value corresponding to each first sampling time point in sequence according to the time sequence; If the first comprehensive mutation sensitivity judgment value corresponding to the first sampling time point of the current traversal is larger than or equal to a preset threshold value, inputting the first electric field intensity, the first leakage inductance current amplitude, the first line harmonic characteristic and the first comprehensive mutation sensitivity judgment value corresponding to the first sampling time point of the current traversal as independent variables into a first preset linear judgment function to obtain an initial electrified state identification result corresponding to the first sampling time point of the current traversal.
8. The electrified state identification device of the pole tower is characterized by comprising a first identification module, a second identification module, a third identification module and a fourth identification module; The first identification module is used for acquiring first electric field intensity, first leakage inductance current amplitude and first line harmonic characteristics corresponding to each first sampling time point of the tower according to an initial sampling period, wherein the initial sampling period is determined according to the total amount of currently available energy of the tower; the second identification module is configured to calculate, according to each of the first electric field intensities and each of the first leakage inductance current amplitudes, a first electric field change rate and a first current change rate corresponding to each of the first sampling time points, and determine, according to each of the first electric field change rates and each of the first current change rates, a first comprehensive mutation sensitivity judgment value corresponding to each of the first sampling time points; The third identifying module is used for traversing the first comprehensive mutation sensitivity judging values corresponding to the first sampling time points in sequence according to the time sequence to obtain initial electrified state identifying results corresponding to the towers at the first sampling time points; The fourth identifying module is configured to adjust the initial sampling period based on each initial charging state identifying result to obtain a target sampling period, so as to continuously obtain second electric field intensity, second leakage inductance current amplitude and second line harmonic characteristic corresponding to each second sampling time point of the tower based on the target sampling period, so as to determine a target charging state identifying result corresponding to each second sampling time point of the tower.
9. A terminal device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method of identifying a live state of a pole as claimed in any one of claims 1-7 when the computer program is executed.
10. A computer readable storage medium comprising a stored computer program, wherein the computer program, when run, controls a device in which the computer readable storage medium is located to perform the method of identifying a charging status of a pole as claimed in any one of claims 1-7.

Description

Method, device, equipment and medium for identifying charged state of pole tower Technical Field The present invention relates to the field of power systems, and in particular, to a method, an apparatus, a device, and a medium for identifying a charging state of a tower. Background In a modern power system, the live state of a high-voltage distribution pole tower is accurately identified, and the method is an important link for guaranteeing the safe operation of the power system and the personal safety of operation and maintenance operators. The tower is used as a physical carrier for supporting and transmitting electric energy in the power grid, and whether the tower is electrified or not directly determines regulations and risk levels of field operation such as overhaul, construction and the like. Misjudging the live state may lead to serious personal electric shock, equipment damage and even grid faults. With the promotion of the automation and intelligent level of the power distribution network, advanced applications such as remote state monitoring, automatic safety locking and intelligent early warning all rely on real-time sensing of the electrified state of the pole tower. The prior art mainly relies on an electric field sensor or a current transformer arranged on a pole tower to collect surrounding electric field intensity or leakage current signals in a continuous and high-frequency mode, and judges whether the electric field is electrified or not through simple comparison with a preset fixed threshold value. This approach, while intuitive and easy to deploy, has significant drawbacks in terms of low power consumption. In the aspect of low power consumption, the continuous collection of lower pole and tower related elements continuously works, which can lead to high overall energy consumption of the system, seriously depends on an external power supply or a high-capacity battery, and has seriously insufficient equipment endurance and high maintenance cost in a remote pole and tower scene without commercial power. Disclosure of Invention The invention provides a method, a device, equipment and a medium for identifying the electrified state of a pole tower, which can solve the problem that the electrified state of the pole tower is difficult to identify while the low power consumption is maintained in the prior art. In a first aspect, an embodiment of the present invention provides a method for identifying a charging state of a tower, including: acquiring first electric field intensity, first leakage inductance current amplitude and first line harmonic characteristics corresponding to each first sampling time point of the tower according to an initial sampling period, wherein the initial sampling period is determined according to the total current available energy of the tower; according to the first electric field intensity and the first leakage inductance current amplitude, calculating to obtain a first electric field change rate and a first current change rate corresponding to the first sampling time points, and determining a first comprehensive mutation sensitivity judgment value corresponding to the first sampling time points according to the first electric field change rate and the first current change rate; Traversing the first comprehensive mutation sensitivity judgment value corresponding to each first sampling time point in sequence according to the time sequence to obtain an initial electrified state identification result of the tower corresponding to each first sampling time point; And adjusting the initial sampling period based on each initial charged state identification result to obtain a target sampling period, so as to continuously obtain second electric field intensity, second leakage inductance current amplitude and second line harmonic characteristics of the tower corresponding to each second sampling time point based on the target sampling period, and further determine a target charged state identification result of the tower corresponding to each second sampling time point. The embodiment of the application effectively solves the technical problem of identifying the electrified state of the tower while keeping low power consumption by constructing a complete closed loop from energy self-adaptive initialization to state driving feedback regulation. Firstly, an initial sampling period is determined according to the total amount of currently available energy of the tower, system power consumption is limited in the energy supply capacity range from the source, and a long-term operation basis under the condition of no external power supply is ensured, which is a fundamental premise for realizing low power consumption. And secondly, by calculating the change rate of an electric field and current and fusing the change rate with the comprehensive mutation sensitivity judgment value, the core of the recognition mechanism is changed from relying on an absolute threshold value to a slope o