EVOSYS provides elite Testing and Commissioning (T&C) services for UK EV, HV, and MV substations, serving as the final, critical bridge between construction and energized operation. We deliver a comprehensive quality assurance framework that ensures every component—from primary plant to complex automation logic—functions with 100% reliability, safety, and compliance with DNO and National Grid standards.

Our commissioning engineers are specialists in navigating the intricacies of modern digital substations, combining deep multi-vendor knowledge with a “Safety First” methodology to guarantee a seamless grid connection.

Protection & Control Commissioning

We specialize in the validation of sophisticated numerical relay schemes. Using advanced injection test sets, we verify:

  • Relay Logic & Coordination: End-to-end testing of overcurrent, differential, and distance protection schemes to ensure rapid, selective fault isolation.
  • Logic Scheme Proving: Comprehensive “black-box” testing of automated interlocking, breaker-fail logic, and auto-reclose sequences.
  • Secondary Injection: Precision calibration and verification of relay settings and characteristic curves.

SCADA, Automation & Network Validation

As experts in the digital grid, we perform rigorous testing of the substation’s “nervous system”:

  • Protocol Conformance: Verification of IEC 61850 (Edition 1 & 2), DNP3, and IEC 104 data mapping.
  • Redundancy Drills: Proving optimized failover performance for different communication architectures and dual-path telemetry links.
  • Point-to-Point Testing: Comprehensive verification of I/O signals from field devices to the local HMI and the remote Control Centre.

Handover & Compliance Documentation

Every project concludes with a comprehensive commissioning pack, including certified test sheets, updated “as-built” SCD/CID files, and final settings files. This ensures a transparent, auditable trail for regulatory compliance and long-term asset management.