Transformer Diagnostics Monitor

Introduction

• Integrated diagnostic monitoring system on 110~330kV transformer insulation condition
• Very easy to integrate it into existing protection systems
• Monitors bushing insulation based on the sum of currents method
• Monitors PD caused by bushing and transformer insulation defects
• Monitors load current signals to detect critical winding deformation resulting from short circuits
• Estimates an efficiency of the transformer cooling system
• Noise elimination method: T-F analysis, polarity discrimination, TOA method
• Two years archive of events
• TDM software for Expert analysis

Features

1. Main insulation state

• Monitors partial discharges in transformer insulation
• Identifies defect type by correlation of partial discharges intensity and type of the revealed defect with chromatography data

2. Bushing insulation state

• Monitors bushing tan delta, capacitance and conduction currents
• Monitors partial discharges in HV bushings

3. Asymmetry of Phase windings impedance

• Monitors the transformer neutral current indicating asymmetry in the windings impedance, which occurs when windings deformation as result of short circuit currents

4. Efficiency of Cooling system

• Monitors temperature difference between the top and the bottom parts of the transformer tank along with the ambient temperature and load

System Configuration

Specifications