HIGH VOLTAGE TESTING AND CONSULTING

Power SystemsInsulation

Lines, Cables and SubstationsPower Utility Automation,

Relay Protection and ICT (IEC 61850)Power Quality

STRI CONSULTING

©INMR

STRI Consulting

STRI is a Scandinavian technology consultant within electrical power technology and systems including power generation, transmission and distribution. Our main office and laboratory facilities are located in Ludvika, Sweden with branch offices in Gothenburg and Västerås.

Our ambition is to support the work of efficient and reliable electric power solutions for a “green” future with minimum impact on the environment.

Our consulting services are based on our long international experience combined with cooperation with our partners, powerful simulation software and unique testing facilities in our accredited high voltage laboratory.

STRI CONSULTINGleading-edge competence for directly applicable soutions

Our Consulting services• Power System Studies and Analysis

• Insulation Coordination

• Pre-Design of Lines, Cables and Substations

• Power Utility Automation, Relay Protection and ICT (IEC 61850)

• Availability and Reliability Studies

Focus areas and applications• HVDC and HVAC transmission systems

• Lines, cables and substations

• Insulation optimization and diagnostics

• Renewables, wind power and distributed generation

• Nuclear power and its interaction with the power grid

• Energy storage and smart grids

• Railway systems

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ABOUT USSTRI is a leading independent company specializing in high voltage testing and consulting within high voltage technology and power system applications. Our specialists and engineers deliver solutions to help improve performance, efficiency, reliability, profitability, and to minimize impact on the environment.

Our clients are power grid companies, power producers, industries, railway companies, authorities, agencies and manufacturers of electrical equipment all over the world.

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STRI performs advanced power system studies related to planning, upgrading and operation of power generation units, substations, power transmission and distribution grids.

Power system stability studies• Voltage, rotor-angle, frequency• Transient and small-signal Feasibility and conceptual studies• HVAC, HVDC, VSC HVDC, FACTS, Cables• System Protections• Model development

Transmission and distribution system studies• Reliability• Power Quality• Measurements• Smart Grid solutions Generation integration studies• Conventional generation• Renewable and distributed generation• Grid code development, hosting capacity etc. Traction system studies.

Insulation coordination and reliability are important aspects in the design and refurbishment of overhead lines and substations.

STRI conducts studies of new designs, and to enhance ex-isting infrastructure, for example voltage up-rating of lines and conversion of AC lines to DC.

Dynamic rating of lines and substations together with on- line monitoring allows for smarter and more reliable operation, as well as the testing facilities for verifying the proposed solutions, for example:

• Conceptual studies, prototype demonstrations and verification of overhead lines including cable transitions, voltage uprating and AC/DC conversion

• Electrical dimensioning and testing of substation equipment including compact design and reliability evaluation

• Statistical insulation coordination of air clearances with regard to lightning and switching over voltages

• Line Performance Estimator (LPE software) to optimize insulation for HVDC and HVAC lines for varying environment

• Software and expertise for Dynamic Line Loading, EMF, audible noise, corona effects and grounding

• Maintenance and diagnostics for cables, disconnectors, breakers etc.

• Failure investigations of cables and cable accessories, line joints, circuit breakers etc.

LINES, CABLES AND SUBSTATIONS

POWER SYSTEMS

Insulation related issues are often difficult to address due to lack of adequate standards and recommendations.

STRI has an exceptional combination of competence, methods and tools to cover most needs in the area of optimal insulation solutions such as for example:

• Electrical dimensioning of insulation

• Design and testing of glass, porcelain and composite insulators

INSULATION• The IST, Insulator Selection Tool for selection of optimum design of insulators for overhead lines and substations

• Evaluation of insulator performance with tracking/erosion pollution, ice and snow tests

• Ready-to-use guidelines for in-service and after-service inspections and evaluation of insulators.

Our recent projects include 800 kV UHVDC, 1100 UHVAC, snow and ice testing.

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STRI Consulting

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SoftwareSTRI works with our own and third party software:

Reliability studies, maintenance optimization and relay coordination. NEPLAN®

Selection and optimization of overhead line insulators. LPE, IST

Dynamic current rating for HV apparatus and OH lines.I-Q and I-Line

Design and earthing. PLS-CADD®, COMSOL Multiphysics®, TPE, EAC

Power system analysisPSCAD/EMTDC®, SIMPOW®, PSS/E®, NEPLAN®,PowerFactory®, and ATP-EMTP.

STRI’s consulting services can also be combined with our testing services. We perform high voltage tests on products with system voltages up to 800 kV. All dielectric and environmental tests can be carried out.

STRI’s laboratory is accredited by SWEDAC, the Swedish accreditation body, giving our clients the benefit of knowing that we provide quality testing and comp- etence. STRI is a member of SATS which is a member of STL (Short Circuit Testing Liaison).

For more information on STRI’s testing services, please visit our website.

STRI provides a complete range of consultancy services related to the open implementation of the international standard IEC 61850.

STRI has access to major manufacturers of IEDs, IEC 61850 testing devices and software tools, and also to inde-pendent IEC 61850 engineering tools.

To enable expandable and fully vendor independent systems, STRI can assist you through the entire prospecting, tendering and commissioning FAT phases.

We can help you define the optimum solutions and specify the requirements for equipment. Manufacturers’ equipment and configurations can also be verified to ensure full intero-perability and assist in commissioning or system perfor-mance.

STRI’s competence also includes smart system solutions, ICT, SCADA and smart and active substations with process bus. We provide migration strategies for IEC 61850 to ensure a seamless and cost efficient integration to existing installation.

Our portable independent interoperability laboratory for IEC 61850 offers testing for substation automation systems with interface to SCADA and other energy management systems.

STRI also offers standard or tailored hands-on training and workshops on IEC 61850 which have been performed in various countries involving major international power utilities, manufacturers and engineering companies.

STRI’s experts in the Power Utility Automation team are active members of IEC Committees TC57 and TC95/MT4.

Together with STRI’s acknowledged competence within substation design and system analysis, STRI is your ideal partner for a safe and efficient step into IEC 61850 based substation automation.

POWER UTILITY AUTOMATION, RELAY PROTECTION AND ICT (IEC 61850)

STRI Consulting

STRI HIGH VOLTAGE TESTING

STRI has the know-how and resources to advise clients on how to minimize disturbances and achieve optimal power quality.

We have been involved in various projects for power quality studies and measurements worldwide. Several studies have led to new approaches for the description and mitigation of disturbances, e.g. ”hosting capacity” and ”responsibility sharing.”

The combined resources in all of STRI’s technical areas provide a solid foundation for correct and effective answers to most power quality and EMC related problems.

STRI deals with a wide variety of issues related to power quality studies and measurements for transmission, distribution, generation, railway and industrial systems including:

POWER QUALITY• Problem solving in existing installations

• Fault tracing, mitigation methods and power quality measurements

• Long and short interruptions, dips, transients, flicker, harmonics and unbalance

• Verification of EMC requirements in power and industrial plants

• Immunity testing and radio interference measurements

• Distributed generation and wind power integration

• Reliability studies and risk assessment

• Radio frequency emission of substations and of HVDC terminal stations

• Harmonic impedance calculations and measurements.

For more information on STRI’s High Voltage Testing and Consulting services, please visit our website, www.stri.se

STRI AB | Box 707 | SE-771 80 Ludvika | SwedenPhone: +46 240 795 00 | stri@stri.se

www.stri.se

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