Transformer partial discharge online monitoring system

IN-202B Transformer Partial Discharge Online Monitoring System

Transformer partial discharge online monitoring system

System Components

IN-202B Transformer local line monitoring systemBy the intelligent perception sensor, signal processing unit, data acquisition unit, analysis and diagnosis unit, communication unit, display module (optional), power supply module, background monitoring, diagnosis and analysis software (optional) and other components. The intelligent sensing sensors include ultra-high frequency (UHF), high frequency (HF), ultrasonic (AA/AE) and other monitoring principle sensors, which can be selected or combined according to the actual engineering requirements.

system function

IN-202B Transformer local line monitoring system is equipped with real-time monitoring, data acquisition, spectrogram analysis, discharge type identification, fault location, trend analysis, over-limit alarm, remote monitoring, data storage and query, etc. It is designed to comprehensively and accurately monitor the health status of the transformer, timely detection and early warning of potential failure risks, and provide powerful data support for the safe and stable operation of the electric power system and the condition-based overhaul. Provide strong data support.

Mainframe Parameters

host channel 16 Roads Sensor Access N-Type
Mainframe Structure 2U Chassis or Wall Mount communication method RS-485, Ethernet
Mainframe power supply AC220V ±10% communication protocols Modbus, DL/T860
sampling interval real-time scanning Measurement content Discharge amplitude, phase, number of times, etc.
Spectral content PRPD, PRPS, Lorenz, 3D, frequency distribution, time domain waveforms, etc.
Diagnosis of discharge type Internal air gap discharge, along surface discharge, corona discharge, suspension discharge, oil-paper interface discharge, etc.

High Frequency (HFCT)
frequency range 0.1MHz ~ 50MHz (level of) sensitivity 5pC
impedance matching 50Ω Installation Through-center type (φ60mm)
output connector BNC Type protection class IP68

Ultrasound (AE/AA)
frequency range 20kHz ~ 300kHz peak sensitivity 60dB
impedance matching 50Ω Installation magnetic suction
output connector BNC Type protection class IP68

 Ultra High Frequency (UHF)
frequency range 300MHz ~ 2000MHz (level of) sensitivity 5pC
impedance matching 50Ω Installation Built-in or oil valve type
output connector N-Type protection class IP68

system architecture

Multiple UHF sensors are deployed on the transformer to collect the UHF signals generated by the transformer partial discharge. The collected signals are transmitted to the transformer localized on-line monitoring IED (Intelligent Electronic Device), where amplification, filtering and de-noising, data storage, feature extraction, pattern recognition, and threshold comparison, spectrogram generation, fault diagnosis, and other processing are carried out sequentially.
The processed data is transmitted to the remote backstage monitoring system through the fiber optic network based on IEC61850 standard. The remote background monitoring system can display the data and visualize the information about partial discharge of transformer in the form of charts and diagrams, which can help the staff to grasp the partial discharge of transformer in time and provide the basis for transformer fault warning and maintenance.
Transformer partial discharge online monitoring system

IN-202B Transformer local line monitoring system workflow diagram

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