한글
IoT Switchgear
IoT Switchgear
Core Technology
G2POWER’s switchgear applied technology
Applied technology : Patent(NO.10-1608964) : High voltage switchgear, Low voltage switchgear, distribution board, motor control board equipped with partial discharge monitoring and diagnosis system by ultrasonic and transient earth voltage signals
Composition of partial discharge monitoring diagnosis system
Sensor
Composed of Airborne-Acoustic sensor(AA), Airborne-Emission sensor(AE), and TEV(Transient Earth Voltage)sensor, and detects abnormal signals about the insulation status of the switchgear generated by partial discharge.
TEV(Transient Earth Voltage) sensor
- When a partial discharge occurs, the instantaneous transient earth voltage signal of the electric field induced on the surface of the switchgear is a frequency
  component of 1 MHz~30 MHz. It is a method of detecting the charge induced in a conductor having a surface resistance value
- Use to detect partial discharge of transformers, circuit breakers, switch, busbars, etc in switchgear.

Airborne-Acoustic Sensor
- A sensor device that can detect whether partial discharge is occurring in the switchgear by detecting ultrasonic waves in the 40 kHz band among the sound pressure
  generated by the partial discharge
- When 40 kHz sound pressure is above a certain level, partial discharge is detected

Acoustic-Emission Sensor
- Detecting vibrations caused by acoustic emission, in which 150 kHz band radiation emitted when a partial discharge inside the switchgear is transmitted to the
  exterior.
- Sensor unit used to detect partial discharges occurring inside molds and oil-immersed transformers, and GIS
Partial discharge detection devices
Receiving the ultrasonic signal and transient earth voltage signal detected by the sensor unit, diagnoses the partial discharge status with an intelligent artificial neural network algorithm, and notifies the administrator of the alarm signal
Sensor receiver unit : As a DAQ board, it receives the partial discharge signal data measured by the sensor and removes noise by digital filtering.

Setting unit: A device that sets values such as alarm and on-off criteria

Abnormality decision unit: Determining the insulation status of the partial discharge signal of the switchgear using the frequency spectrum
- Signal conversion unit: Converts ultrasonic signal and TEV voltage pulse signal into digital signal
- Noise removal unit : Appling filter to remove circuit noise and other impulses included in the partial discharge signal
- Discharge detection unit : Amplifing the partial discharge signal and diagnose whether or not partial discharge has occurred through an artificial intelligent neural
  network algorithm
- Control unit : Remotely reporting the deterioration status of the switchgear by the detection result of the artificial intelligent neural network algorithm
Core Technology
Transient Earth Voltage Sensor
Transient Earth Voltage Sensor

· The electric field induced by partial discharge and arc has a frequency
  component of 5MHz~30MHz and detects the charge induced in the
  switchgear with a surface resistance value
· An electric field induced by an impulse when a partial discharge occurs.
  That is EM (Electro-Magnetic) detection method is applied
· It detect that the impulse generated by partial discharge has a greater
  value than white noise and is induced in the conductor
Airborne-Acoustic Sensor
Airborne-Acoustic Sensor

· Detector design that can detect whether partial discharge is occurring by
  detecting ultrasonic waves in the band of 30~60 kHz among sound
  pressure generated by partial discharge
· Diagnosis of partial discharge phenomenon by sound pressure detection
  at fc 40 kHz and FFT signal processing
Acoustic-Emission Sensor
Acoustic-Emission Sensor

· Detecting vibrations caused by acoustic emission, in which 150 kHz band
  radiation emitted when a partial discharge occurs inside the switchgear is
  transmitted to the exterior.
· Sensor unit used to detect partial discharges occurring inside molds and
  oil-immersed transformers, and GIS
Partial Discharge Diagnosis System
Partial Discharge Diagnosis System

· Detecting, analyze and diagnose electrical signals by partial discharge
  through TEV and AA/AE sensor units
· Monitoring and control the operating status of the controller
· Acquiring the sensor information and transmit status and information of
  controller
· Linux-based embedded processing control design
G2POWER

Officee & Factory) Postal code 18628. 868-12, Chorok-ro, Yanggam-myeon, Hwaseong-si, Gyeonggi-do, Republic of Korea
Tel. +82-31-427-1261 / Fax. +82-31-427-1271 / Email. g2p@g2p.co.kr

Copyright© G2POWER Co., Ltd. 2020-2021. All rights Reserved.