A Relay Coordination Study ensures that the power system remains reliable by isolating only the faulty section during faults, minimizing disruption to the healthy parts of the network. This prevents equipment damage, enhances system stability, and ensures safety for operators and maintenance personnel.

Methodology

1. Data Collection
2. Gather all necessary system information, including:

• Single Line Diagrams (SLDs)
• Existing protection device settings
• Fault analysis reports
• Equipment ratings and manufacturer data

1. Modeling
2. Develop a detailed model of the electrical system using specialized software to simulate real-world operating conditions and faults.
3. Validation
4. Verify system model accuracy by comparing simulation results with existing system behavior, ensuring realistic and reliable outcomes.
5. Time-Current Characteristic (TCC) Curve Analysis
6. Develop and analyze TCC curves to ensure proper coordination between protection devices. This ensures that faults are cleared selectively without unnecessary outages.
7. Report Preparation
8. Deliver a comprehensive report detailing:

• Optimized relay settings
• Coordination analysis results
• Fault clearing times for different fault scenarios
• Recommendations for any necessary protection upgrades

Software Tools Used

We use industry-leading software for accurate simulations and analysis:

• ETAP: For protection and coordination studies, including TCC curve analysis and fault simulations
• DIgSILENT PowerFactory: For detailed modeling, validation, and advanced system protection studies

Results Delivered

Clients will receive:

• Optimized relay settings for improved system coordination
• Time-Current Characteristic (TCC) curves for all protection devices
• Fault clearing times and analysis of various fault scenarios
• A detailed report compliant with international standards (IEEE, IEC)
• Recommendations for relay settings adjustments, upgrades, or replacements

We work with devices from major manufacturers including Siemens, ABB/Hitachi, GE, Schneider, and more to ensure the highest level of system protection.