HVDC and HVAC

STRI provide leading-edge expertise in studies, design, analysis and testing for High Voltage Direct Current (HVDC), High Voltage Alternating Current (HVAC) applications and FACTS . In this field STRI is among the most experienced companies in the world . This is du to the many years work together with manufacturers, system transmission operators, producers, investors, project developers , plant and grid owners.

Examples of STRI's services in the area:

Studies & Engineering

Power system studies for HVAC, HVDC, HVDC VSC, FACTS and HVDC multiterminal applications
Pre-feasibility and Feasibility Studies for new links HVDC/HVAC
Studies for HVDC VSC offshore grids ( Wind Power applications)
Insulation coordination studies based on transient voltage simulations
Selectivity calculations for relay protections for power networks
Design of Electrodes , Filters, valves and other parts
HVAC/HVDC conversions and design of overhead lines
Reactive power compensation covering sizing and placing such units ( FACST as SVCs, Statcom etc) in the power network
Subsynchronous torsional interaction studies (SSR, SSTI)
Availbility and Reliability studies
Fault-tracing, and power-quality measurements in Power networks
Power Quality Studies, investigations, mitigation methods and measurements for AC and DC networks
Basic design and grid solutions
Environmental Impact Assessment (EIA)
Studies, analysis and calculation for up rating existing lines to higher voltage or HVDC on existing lines...compact lines or replace with cables
Studies, analysis and calculation for HVDC Cables
Harmonic Impedance Calculations
Calculation of electrical fields
Preparation of specifications and tenders documents
R&D Activities including modelling of equipment

Assistance during construction and commissioning

Design review
Commissioning and testing of isolators, cables, and valves
Diagnostics ( cables, valves and others etc.)
Witnessing of tests
Witnessing of commissioning
Power Quality Measurements

Testing

See STRIs services in this area