Tuesday, February 12, 2019
Courses highlighted in green refer to the Transformer Relay Protection Program track.
Registration and Information Desk
Transformer Type Designs
This extended session will include various types of transformer designs.
Henk Fonk, Team Leader, Electrical Design
Auto-transformers have several advantages over 2-winding transformers with the same output power, such as lower weight, lower losses and hence lower costs. Auto-transformers call for several unique design considerations which require special attention and careful study. These considerations will be addressed during this presentation.
Waldemer Ziomek, Director of Research & Development
PTI Transformers LP
Phase-shifting transformer (PST) is a transformer, or combination of transformers, with two sets of line terminals (S and L), which is capable of varying the voltage phase-angle relationship between the S terminals and the L terminals. Dependent upon whether the PST is installed in the parallel branch with the higher or lower impedance, an advanced (L terminal voltage leads the S terminal voltage) or a retard (S terminal voltage leads the L terminal voltage) phase angle is needed to control the power flow distribution between the branches. The presentation will discuss operation of PST, type of PST designs, including an example of a design.
Types and applications of mobile substations are presented. A mobile versus power transformer is discussed with emphasis on the temperature ratings and associated with it hybrid insulation system, short circuit and dielectric strength, oil preservation and cooling system design. The mobile transformer and substation testing is discussed. The essentials of specifications and trailer components are also addressed.
Generator Step-Up Transformers
Mark Lowther, Development Engineer
Generator Step-Up (GSU) transformers perform a critical role in today’s electric power systems by connecting the entire electrical output of a power generating station to the high voltage transmission grid. GSU transformers are called on to operate continuously at or near full load output, with only brief scheduled outages every 18-24 months to allow for power station maintenance operations. This presentation outlines how today’s GSU transformers must be designed and manufactured to operate reliably under the most demanding of anticipated service conditions.
Slippery Slopes – Journey through Differential Protection – Part I
Ed Khan, Director of Protection Training
Doble Engineering Company
Transportation & Rigging
Rick Maloyed, Project Manager
Edwards Moving & Rigging
The transportation of large, heavy, and oversize transformers has always been fascinating and mysterious for those who have witnessed a large loaded trailer pass by, seen a crane lift at a port or just been amazed by the sheer size of the units. Some think it must be incredibly difficult while others say it is simple. This presentation is designed to provide Logistic Solutions and to better understand the challenges of moving transformers at all levels. Edwards Moving and Rigging moves over 300 large transformers annually. This presentation will provide real life examples and case studies to illustrate all modes of transport and rigging used in the transformer industry as well as provide logistical considerations and applications for moves, whether an internal movement of a spare within a utility or receiving a new transformer from factory to pad.
Insulating Fluid Materials: The Evolution of Transformer Oils – Part I
Nikola Lukenda, Technical Services Advisor
Petroleum derived mineral oils are the most common type of insulating fluid used in transformers today. Although their use originates in the late 1880’s, today’s mineral oils have evolved to reflect changes in transformers themselves, as well as oil refining technology. Catalytic dewaxing (hydroisomerization) represents the most advanced form of mineral oil refining technology. Using severe processing conditions in conjunction with specialty catalysts, wax molecules are selectively converted (isomerized) into high quality isoparaffins. The resulting isoparaffinic fluids exhibit unique properties ideally suited for use in transformers. This seminar will provide an overview on transformer mineral oil production and properties, with a particular emphasis on the advantages conferred by newer isoparaffinic fluids.
Insulating Fluid Materials: Materials Application of Ester Based Insulating Liquids: Benefits and Attention Points – Part II
Alan Sbravati, Global Technical Application Manager
Cargill Bioindustrial – Power Generation
The second part of this presentation will include an overview of the application of ester based liquids for power transformers, the positive and negative aspects in comparison to mineral oil and the expected behavior on long term basis for transformer in service.
Slippery Slopes – Journey through Differential Protection – Part II
Ed Khan, Director of Protection Training
Doble Engineering Company
Transformer Bushing Fundamentals
David Geibel, Technical Director
Art Del Rio, Product Manager Transformer Bushings
This bushing fundamentals session will cover bushing theory, design, function, terminology, standards, and different insulation technologies. Advantages, disadvantages, and differences in the types of oil-impregnated paper (OIP) bushings and dry & composite-type bushings available on the market today will be discussed. Attendees will have a clear understanding of installation, maintenance, and testing procedures, and the challenges that may be encountered when working with OIP and dry & composite-type bushings. A thorough understanding of the details needed when planning a bushing replacement project will be presented.
Lunch & Heavy Equipment Viewing
Transformer Cooling Fundamentals
Craig Stiegemeier, Director of Technology & Business Development
James Dunn, Regional Manager
With temperature control being crucial in newer transformers, heat dissipation becomes very important. However, cooling system performance, with or without moving mechanical equipment, deteriorates with age. Even systems without oil-pumps or fans can fail due to weathering, rusting and fouling. How do we evaluate the health of the cooling system? Technology has improved with time, so what optimized solutions are available?
Sudden Pressure Relays – Concept, Construction, Application & Testing
Emilio Morales, Technical Application Specialist
Learn the theory behind the deployment of the sudden pressure relays in preventing further catastrophic events within a transformer in the case of a rapid pressure rise. Realize the methodology behind placement and application of both mechanical and electronic models, including two out three logic and adjustable sensitivity. View construction methods and understand the distinct advantages between mechanical and electronic models. Proper installation tips will be discussed to ensure units are operating in the manner in which they are intended on both new and retrofit installations. Principles behind field testing will be demonstrated as well as the importance of maintaining unit health in the field to avoid potential false trips.
Transformer Overloading & its Impact on Transformer Aging
Hugo Campelo, Principal Technology Expert
Overloading transformers while maintaining its expected lifetime seems possible and can represent an important degree of freedom for operators and end-users of power transformers in this fast-changing context. The overload of a transformer involves a complex change in the behaviour of the equipment that needs to be managed holistically. This means that relevant direct measurements need to be used together with adequate advanced prediction capabilities. The main consequences of an overload are discussed as well, what are the available thermal tools and thermal techniques, what is the expected accuracy of the existing predictions, as well as what still needs to be done to leverage this new paradigm of operating power transformers based on their instantaneous dynamic thermal rating.
Bucholz Relays – Concept, Construction, Application & Testing
This presentation will talk about the the concept, construction, application and testing of Buchholz relays. These relays, which are applied on liquid filled transformers and reactors with oil conservators, act as a central protection system. Installed in the pipeline between tank and oil conservator, it reacts to faults which occur inside the transformer. Damages which are not visible can be detected early by the Buchholz relay.
Gases moving in the direction of the oil conservator or shock waves created by the rapid gas development trigger the signaling system of the Buchholz relay. The Buchholz relay also takes over the function of an oil level indicator when there is not enough oil in the conservator or when there is an oil leak.
Load Tap Changer Fundamentals
Bernhard Kurth, General Manager
David Geibel, Engineering Manager
Energized Load Tap Changers (LTCs), De-Energized (DETC), Transmission Class, Distribution Class, Resistive, Reactive, and so very much more. This is by far one of the most impressive presentations of the week, and it is jam-packed with information about history, usage, various designs, operations, maintenance, gas analysis, repairs, failures and components. Representatives of ABB and Reinhausen will be on hand to make presentations and then open the floor for discussion, and most importantly, to field your questions. This extremely practical presentation will allow the attendees to ask about all types of subjects related to the everyday operations, loading, and maintenance of transformer tap changers.
Methods to Detect Transformer Saturation due to Geomagnetic Induced Currents (GIC)
Rene Midence P. Eng., Director of Technical Services
ERLPhase Power Technologies Ltd.
This technical presentation provides general information on GIC in power systems and describes the causes and sources of GIC and touch on the consequences on power transformers. In addition, it provides information on how to apply a power system monitoring device to monitor for the negative effect of GIC on power transformers.
Transformer Modeling for GIC Studies using Real Time Simulation
Dean Ouelette, Manager of Protection and Automation
This presentation will address various aspects of modelling transformers in real time digital simulations. First, the basics of real time digital simulations will be discussed and then a detailed description of transformer models will be offered. One of the key subjects related to transformers is the occurrence of sympathetic inrush. This type of inrush is not understood in its totality. The presentation will explain what sympathetic inrush is and how this condition can be modelled in a real time simulation. The second topic that has assumed critical importance in recent years is the occurrence of geomagnetically induced currents (GIC) in a power system during solar storms. This presentation will explain the phenomenon and then describe how GICs impact transformers along with modelling techniques adopted to study the response of transformers under such conditions. Transformer design plays a critical role in handling the negative impact of GICs. Shell and Core type of transformer design react differently and this will be part of modelling techniques that are used in real time simulation. The presentation will provide a very clear understanding of these two complicated issues along with basic understanding of real time simulations along with general transformer modelling techniques.
Ask the Experts Panel
Industry Expo Opening & Reception
ABB and Delta Star will have heavy equipment on display during Industry Expo.
After Expo Party at Red Rock’s Crimson
Seminar sponsors SPX, ABB Inc., A-Line EDS and Delta Star invite seminar attendees and their guests to continue the evening with dinner, drinks, music and conversation at the hotel’s Crimson nightclub.