Gutman, Igor

Marketing Director, Independent Insulation Group, Sweden

Gutman, Igor

Marketing Director, Independent Insulation Group, Sweden

Biography

1. Development of IEC-Based Methodology for Site Severity Assessment
2. Application of Composite Insulators: Perceptions vs. Service Experience
3. Status of Pollution Test Procedures for Insulators Made from Hydrophobicity Transfer Materials

Dr. Gutman received his MSc and PhD in HV engineering from Leningrad Polytechnic Institute and has experience covering 40 years. In 1994 he joined STRI where his main areas of activity included dimensioning and maintenance of insulation in clean and polluted environments; ageing characteristics and accelerated ageing tests. He has published over 200 papers and is a Sr. Member of IEEE. He is also a member of Swedish IEC TC 36 “Insulators”, Distinguished Member of CIGRE and active in working groups within CIGRE/IEC/IEEE. He was 2012 recipient of the Claude de Tourreil Memorial Award for Lifetime Achievement in the Field of Electrical Insulators and also received IEC’s 1906 Awards in recognition of service to technical standards.

1. Utilities must evaluate design pollution severity for new overhead lines and substations as well as during uprating and refurbishment projects. This is mandatory not only when pollution performance is the dominant dimensioning factor but also for less polluted environments to optimize insulation selection. This presentation discusses methods of pollution monitoring and how these are being continually improved, as confirmed by comprehensive findings. It also explains a ‘smart’ combination of different methods to achieve the best possible evaluation of site pollution severity (covering both type A and B pollution) and how such an approach allows creation of pollution maps covering entire networks.

2. European TSOs and DSOs started a collaborative research project to benchmark actual service experience with composite insulators. The project included collecting service experience as well as comprehensive testing of insulators removed both from storage depots and also from service – about 9 million units in total and with average time in service of 24 years. Primary interest was placed on overhead line insulators but substation insulators were also analyzed. This presentation reviews the key findings.

3. While pollution tests are specified in the standards for ceramic insulators for AC and DC applications, insulators made with hydrophobicity transfer materials are not in the scope of these standards. IEC 60815-3, for dimensioning composite insulators in polluted conditions, states only that in the absence of recommended tests, these can be agreed between the user and manufacturer. This presentation updates the state-of-the-art of pollution testing of HTM insulators in different parts of the world.

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