Karot Hydropower Project

Project Overview

At Karot Hydropower Project, our team carried out diagnostic testing and commissioning of 500kV shunt reactors—critical components for voltage regulation and reactive power compensation in ultra-high voltage transmission networks. These reactors are essential for ensuring grid stability during long-distance power transmission and play a key role in maintaining voltage levels within operational limits.

Testing Scope

The project involved a series of high-voltage diagnostic tests in compliance with IEC and NTDC standards, including:

• Pre- and post-commissioning testing of 500kV shunt reactors

• High-voltage AC withstand testing up to 400kVAC

• Capacitance, Tan Delta, and winding resistance assessments

• Turns ratio, polarity, and inductance verification

• Earthing system resistance testing for grounding integrity

Key Testing Procedures

Insulation resistance and winding resistance were verified using Omicron CPC 100 to ensure insulation quality and electrical integrity. Capacitance and Tan Delta testing was performed with CP TD1 to evaluate the dielectric condition of bushings and internal insulation. Turns ratio and polarity accuracy were confirmed using Omicron VOTANO 100. Inductance measurements and core demagnetization ensured magnetic circuit readiness. Earthing system resistance was measured to validate grounding compliance with NTDC benchmarks.

Project Documentation and Impact

All test data was logged using Omicron Primary Test Manager (PTM) software for full traceability and automated reporting. Final reports were shared with stakeholders for commissioning approval and compliance validation. The project enhanced voltage control reliability in the national grid and demonstrated our team’s capability in managing 500kV testing environments.