CN-121500214-B - Interference suppression method, system, device and controller of non-contact voltage sensor

CN121500214BCN 121500214 BCN121500214 BCN 121500214BCN-121500214-B

Abstract

The application relates to an interference suppression method, system and device for a non-contact voltage sensor and a controller. The method comprises the steps of monitoring high-energy particle radiation of an environment where a voltage sensor is located to obtain radiation intensity information of the high-energy particles, cutting off a signal input path of the voltage sensor and collecting first output signals of an internal reference source of the sensor if the radiation intensity information of the high-energy particles is characterized by meeting a first anti-interference condition, wherein the first anti-interference condition comprises the occurrence of an instant high-energy particle interference event, determining an instant interference deviation amount of a current signal processing channel based on the first output signals, and carrying out offset correction according to the instant interference deviation amount if the voltage sensor resumes normal measurement. The application can improve the stability and reliability of the sensor in complex radiation environment.

Inventors

XIA GULIN
LU WENHAO
WU ZHENGWEI
MAO QIANG
TAN BINGYUAN
JIN HUI
LI XIAOXIA
WEI XIAOXING
GUO JIANBAO
SU GUOLEI
XIAO YUKUN
Jing Maoheng
YAN SHUAI
SUN XIANHE
ZHANG XIAOBO
XIAO DALI
YUAN RUIMIN
HU CHUN
XIAO XIONG
CHU JINWEI
LI CHUN
REN CHENGLIN
PENG CHUNRONG
HOU MINGCHUN

Assignees

中国南方电网有限责任公司超高压输电公司电力科研院

Dates

Publication Date: 20260512
Application Date: 20260114

Claims (13)

1. A method of interference suppression for a non-contact voltage sensor, the method comprising: Monitoring high-energy particle radiation of the environment where the voltage sensor is located, and obtaining radiation intensity information of the high-energy particles; If the radiation intensity information of the high-energy particles is characterized to meet a first anti-interference condition, cutting off a signal input path of the voltage sensor, inputting and switching to an internal reference source of the sensor, and collecting a first output signal of the internal reference source of the sensor, wherein the first anti-interference condition comprises the occurrence of an instantaneous high-energy particle interference event; determining an instantaneous interference deviation amount of a current signal processing channel based on the first output signal; If the voltage sensor resumes normal measurement, performing offset correction according to the instantaneous interference deviation; Wherein the method further comprises: If the voltage sensor meets a second anti-interference condition, switching a signal input path of the voltage sensor into an internal reference source, and collecting a second output signal of the internal reference source, wherein the second anti-interference condition comprises a condition of a calibration and drift compensation mechanism triggered periodically or by an event; Determining an accumulated interference deviation amount of a current signal processing channel based on the second output signal; if the voltage sensor resumes normal measurement, performing offset correction according to the accumulated interference deviation amount; Wherein the second anti-interference condition comprises: reaching a preset periodic calibration time, and/or, And according to the radiation intensity information, the calculated accumulated fluence of the high-energy particles exceeds a second preset threshold.
2. The method of claim 1, wherein if the radiation intensity information characteristic of the energetic particle satisfies a first tamper-resistant condition, the method further comprises: In the event of an abnormal operation of the controller of the voltage sensor, a hardware reset of the controller is performed.
3. The method of claim 1, wherein determining a current amount of interference deviation for a current signal processing channel comprises: sampling the current output signal; calculating the current interference deviation amount based on the current output signal through an adaptive filtering algorithm; the current output signal is a first output signal when the current interference deviation is an instantaneous interference deviation, and is a second output signal when the current interference deviation is an accumulated interference deviation.
4. A method according to claim 3, wherein the adaptive filtering algorithm comprises a kalman filtering algorithm.
5. The method of claim 1, wherein performing offset correction based on the current interference deviation amount comprises: determining a normal measurement signal after normal measurement is restored; Determining a target measurement signal according to the difference degree of the normal measurement signal and the current interference deviation amount, wherein the current interference deviation amount is an instantaneous interference deviation amount when a first anti-interference condition is met, and is an accumulated interference deviation amount when a second anti-interference condition is met; And performing measurement control of the voltage sensor based on the target measurement signal.
6. The method according to claim 5, wherein the performing measurement control of the voltage sensor based on the target measurement signal further comprises: Performing data verification on the target measurement signal; and if the data verification of the target measurement signal fails, the current output signal is collected again until the data verification passes.
7. The method of claim 1, wherein the radiation intensity information comprises a pulse count rate of energetic particles, and wherein the first tamper resistant condition comprises the pulse count rate being greater than or equal to a preset count rate threshold.
8. A contactless voltage sensor system for implementing the method according to any of claims 1-7, the system comprising: The voltage induction unit is used for non-contact sensing of the measured voltage and generating an induction signal; a particle monitoring unit for monitoring high energy particle radiation in an environment and generating the radiation intensity information; A process control unit, connected to the voltage sensing unit and the particle monitoring unit, respectively, configured to perform the steps of the method of any one of claims 1-7.
9. The system of claim 8, wherein the particle monitoring unit comprises: the particle detector is used for responding to the high-energy particles and outputting corresponding electric signals; And the signal processing circuit is respectively connected with the particle detector and the processing control unit and is used for conditioning and shaping the electric signal and generating the radiation intensity information.
10. The system of claim 9, wherein the process control unit comprises: A microcontroller; and the watchdog timer circuit is connected with the microcontroller and triggers the system hardware of the microcontroller to reset when the watchdog timer is overtime and is not refreshed.
11. An interference suppression device for a non-contact voltage sensor, the device comprising: The monitoring module is used for monitoring the high-energy particle radiation of the environment where the voltage sensor is located and obtaining the radiation intensity information of the high-energy particles; The first anti-interference module cuts off a signal input path of the voltage sensor and inputs and switches to an internal reference source of the sensor if the radiation intensity information of the high-energy particles is characterized by meeting a first anti-interference condition, and acquires a first output signal of the internal reference source of the sensor, wherein the first anti-interference condition comprises the occurrence of an instantaneous high-energy particle interference event; The deviation determining module is used for determining the instantaneous interference deviation amount of the current signal processing channel based on the first output signal; the offset correction module is used for carrying out offset correction according to the instantaneous interference deviation amount if the voltage sensor resumes normal measurement; The first anti-interference module is also used for switching a signal input path of the voltage sensor into an internal reference source and collecting a second output signal of the internal reference source if the voltage sensor meets a second anti-interference condition; Wherein the second anti-interference condition comprises: reaching a preset periodic calibration time, and/or, And according to the radiation intensity information, the calculated accumulated fluence of the high-energy particles exceeds a second preset threshold.
12. A controller comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 7 when the computer program is executed.
13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.

Description

Interference suppression method, system, device and controller of non-contact voltage sensor Technical Field The present application relates to the field of sensor measurement technologies, and in particular, to a method, a system, a device, and a controller for suppressing interference of a non-contact voltage sensor. Background In the field of non-contact electrical measurement, a non-contact wide-range voltage sensor has become a key device for realizing voltage sensing in smart grids and industrial automation by virtue of the advantages of high safety, simplicity and convenience in insulation and flexibility in deployment. However, the high-sensitivity signal processing circuit is easily influenced by high-energy charged particles such as cosmic rays, atmospheric neutrons and the like, transient pulses or logic errors are caused, the burst distortion of measurement signals is caused, and the reliability in high-altitude and other environments with strong radiation faces a fundamental challenge. To suppress such interference, the related art mainly adopts a post-processing scheme of physical masking and signal filtering. However, physical shielding has limited effect and high cost when pursuing miniaturization, and conventional filtering has insufficient identification capability on random and transient interference caused by particles and may influence dynamic response. The related schemes are passive defense, and source identification and active compensation of interference cannot be realized. Therefore, the related art still has difficulty in meeting the high reliability requirements of the non-contact sensor for interference resistance in a high-energy particle-dense environment. Disclosure of Invention In view of the foregoing, it is desirable to provide a method, a system, a device, and a controller for suppressing interference of a non-contact voltage sensor, which can improve the reliability of the non-contact sensor against interference. In a first aspect, the present application provides a method for interference suppression of a non-contact voltage sensor, the method comprising: monitoring high-energy particle radiation of the environment where the voltage sensor is located to obtain radiation intensity information of the high-energy particles; If the radiation intensity information of the high-energy particles represents that the radiation intensity information meets a first anti-interference condition, cutting off a signal input path of the voltage sensor and collecting a first output signal of an internal reference source of the sensor, wherein the first anti-interference condition comprises the occurrence of an instantaneous high-energy particle interference event; determining an instantaneous interference deviation amount of a current signal processing channel based on the first output signal; And if the voltage sensor resumes normal measurement, performing offset correction according to the instantaneous interference deviation. In one embodiment, the method further comprises: if the voltage sensor meets a second anti-interference condition, switching a signal input path of the voltage sensor to an internal reference source, and collecting a second output signal of the internal reference source, wherein the second anti-interference condition comprises a condition of a calibration and drift compensation mechanism triggered periodically or by an event; determining an accumulated interference deviation amount of the current signal processing channel based on the second output signal; if the voltage sensor resumes normal measurement, offset correction is performed according to the accumulated interference deviation amount. In one embodiment, if the radiation intensity information characteristic of the energetic particle satisfies the first anti-interference condition, the method further comprises: In the event of an abnormal operation of the controller of the voltage sensor, a hardware reset of the controller is performed. In one embodiment, determining the current amount of interference deviation for the current signal processing channel comprises: sampling the current output signal; Calculating to obtain the current interference deviation value based on the current output signal through an adaptive filtering algorithm; the current output signal is a first output signal when the current interference deviation is an instantaneous interference deviation, and is a second output signal when the current interference deviation is an accumulated interference deviation. In one embodiment, the adaptive filtering algorithm comprises a Kalman filtering algorithm. In one embodiment, performing offset correction according to a current interference deviation amount includes: determining a normal measurement signal after normal measurement is restored; Determining a target measurement signal according to the difference degree of the normal measurement signal and the current interference deviation amount, w