Transformers Magazine Vol. 4 Issue 1

Transformers Magazine Vol. 4 Issue 1
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At the moment of writing this Editorial message, we are approaching the end of 2016, and I would like to summarize most important facts from 2016 and share with you some updates and likely scenarios for the near future.

The Transformers Magazine team has worked throughout the year aiming to bring relevant public information to our community. We participated at fairs, conferences, international working groups and paid visits to our customers, meeting people from all parts of the world, from Australia to Canada and from South America to Korea. A few photos included in this message illustrate this. In total, we have published roughly 800 transformers-related news items in 2016.

From all the novelties we have seen, I would single out the world’s first 1,100 kV DC power link to be built in China, for which converter transformers have been ordered from Siemens and ABB. We have also witnessed a solid progress of resilience transformers, particularly in the U.S. The concept of pluggable transformers has progressed to the point where it has the potential to redefine how we use transformers. You can learn more about this concept in one of the interviews in this issue.

In the field of tap-changers we have seen also a lot of improvements, promising a matured technology for distribution transformers, and bringing some completely new concepts for power transformers, such as direct drive, enhanced switching, etc.

Column: Tap-changer know-how

Hermetical sealing of transformers and tap-changers 1. Introduction Every oil-filled electrical equipment must be able to handle a certain thermal expansion of the oil, which is caused by varying...

Brazing technology for distribution transformers

Company overview Oxyweld, a leading Italian manufacturer of oxyhydrogen gas generators for brazing, marked its 36th anniversary and today, thanks to its experience, supports many transformer producers and transformer...

Column: Market review

Transformer market development Demand and supply – Are they ever in balance   Historical development Between 1960 and 1970 the world installed generating capacity grew from 475,000 MW to...

Interview: Yee Shaw, President at Huaming Group

Start in a rented workshop Huaming was founded in the 1990s. At that time, there was a great demand, but also a great shortage of quality transformer components in...

As simple as a smartphone

New test technologies respond to increasing demands Reduce costs, switch to renewable energy sources, create de-centrally supplied grids, maintain high grid quality – we know that the demands made...

Column: Condition monitoring

A technical guide to condition monitoring: Where to begin? Introduction When you own a transformer, it is often challenging to decide whether you have the data you need to...

The new VACUTAP® VR

The new VACUTAP® VR. Maximum performance, wide range of applications. MR’s VACUTAP® tap-changers have been used around the world in a wide variety of applications and under the most...

Column: Power transformer lifecycle

Transformer specification and sustainability 1. Introduction To secure the quality of the installed asset base, in this case power transformers, utilities and industries rely on quality assurance (QA). Here...

Reactor-type tap changers testing

Abstract This paper discusses DVtest or Dynamic Resistance Measurement, a new diagnostic method used in detecting on load tap changer (OLTC) operational problems, as applied to reactor-type tap changers....

Transformers and power quality – Part II

Abstract This article investigates the generation of high harmonics in the magnetizing current of small three-phase transformers using the magnetic field analysis, the Finite Element Method (FEM). Through the...