Testing & Commissioning Report of 66/33KV Olakha Substation
Testing & Commissioning Report of 66/33KV Olakha Substation
1. Introduction
The 66/33kV Olakha Substation plays a critical role in the power distribution network, ensuring reliable transmission and distribution of electricity. Testing and commissioning are essential processes to verify the proper operation of all components before full integration into the grid. This report outlines the procedures, findings, and results of the testing and commissioning of the substation.
2. Scope of Work
The scope of testing and commissioning at the Olakha Substation includes:
- Inspection and verification of primary and secondary equipment
- Functional and performance testing of switchgear, transformers, and protection systems
- Energization and load testing
- SCADA integration and communication system testing
3. Testing Procedure
3.1 Visual Inspection & Pre-Commissioning Checks
Before conducting electrical tests, a detailed visual inspection was carried out, which included:
- Physical condition of transformers, circuit breakers, isolators, and busbars
- Verification of cable terminations, earthing, and insulation
- Checking oil levels in transformers and SF6 gas pressure in breakers
3.2 Transformer Testing (66/33kV Power Transformer)
Key transformer tests included:
- Insulation Resistance Test (IR Test): Ensuring insulation integrity
- Turns Ratio Test: Verifying proper voltage transformation
- Vector Group Test: Confirming correct phase connection
- Magnetic Balance Test: Checking core condition
- Oil Dielectric Test: Measuring breakdown voltage of transformer oil
3.3 Circuit Breaker Testing (66kV & 33kV CBs)
Tests performed on SF6 and vacuum circuit breakers:
- Contact Resistance Measurement: Ensuring low resistance in breaker contacts
- Timing Test: Checking opening/closing time for proper operation
- SF6 Gas Pressure Test: Ensuring adequate gas insulation
3.4 Protection Relay Testing
Protection systems were tested using secondary injection methods:
- Overcurrent (OC) & Earth Fault (EF) Protection
- Differential Protection for Transformers
- Distance Protection for Transmission Lines
- Breaker Failure Protection
3.5 Switchgear & Busbar Testing
- Insulation Resistance Test: Measuring resistance between phases and ground
- Primary Injection Test: Verifying CT ratio and polarity
- Contact Resistance Test: Ensuring proper current flow
3.6 SCADA & Communication System Testing
- Verifying remote operation and monitoring
- Testing RTU (Remote Terminal Unit) and communication links
4. Commissioning Process
4.1 Cold Commissioning (Pre-Energization)
- Verification of electrical connections
- Individual equipment functionality tests
- Protection relay settings and interlocks
4.2 Hot Commissioning (Energization & Load Testing)
- Step-by-step energization from 66kV to 33kV
- Monitoring voltage, current, and system stability
- Final load test to verify full operational performance
5. Test Results & Observations
- All equipment successfully passed insulation and performance tests
- Circuit breakers and protection relays operated within design limits
- SCADA system successfully communicated with the control center
- Transformer and switchgear testing confirmed proper operation
6. Conclusion & Recommendations
The testing and commissioning of the 66/33kV Olakha Substation were successfully completed, ensuring compliance with safety and operational standards. The substation is now fully integrated and operational, ready for service.
Recommendations:
- Regular maintenance and periodic testing should be conducted
- Remote monitoring via SCADA should be continuously supervised
- Spare parts and emergency protocols should be in place for contingency
This report concludes that the Olakha Substation is ready for full-scale operation with optimal performance and reliability.