UCH-II Power Station

Project Overview

At UCH-II Power Station, our team successfully executed high-voltage diagnostic testing and commissioning of Capacitive Voltage Transformers (CVTs), essential components for ensuring accurate metering and reliable functionality of high-voltage substations. CVTs are used to step down voltage levels for protection relays and measurement systems, playing a vital role in maintaining grid stability and relay accuracy.

Testing Scope

The project involved a full suite of diagnostic tests adhering to IEC 61869 international standards, including:

• High-voltage withstand testing at rated voltage levels

• Voltage ratio and phase angle accuracy verification using Omicron VOTANO 100

• Primary injection testing to simulate actual operating conditions

• Polarity verification, frequency response checks, and terminal earthing integrity assessments

Key Testing Procedures

Used Omicron VOTANO 100 to confirm voltage ratio and phase angle accuracy. Insulation diagnostics and partial discharge testing were conducted with CPC 100 and CP TD1 to evaluate dielectric health. Primary injection testing verified CVT performance under system conditions. Polarity and frequency response tests ensured correct wiring and operational consistency. Earthing systems were also evaluated for NTDC compliance.

Project Documentation and Impact

All results were logged using Omicron PTM software. Reports were shared with stakeholders to ensure regulatory compliance. The project enhanced the reliability, safety, and operational performance of the power station, reinforcing its role in the national grid.