transformers | Leonardo ENERGY

Resources on Distribution Transformers

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Thu, 11/09/2006 - 22:37

Application notes, reports, webcasts, presentations and minute lectures on high efficiency distribution transformers.

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Investigation into the Performance of Aluminum Wound Distribution Transformers

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Wed, 05/22/2013 - 20:31

The stresses responsible for transformer failures, creep behavior of aluminum conductor, operating conditions, frequent magnetic inrush current and their effects on the life of distribution transformer (DTs) are being investigated. It is being investigated by conducting experiments that hot spot temperature, creep behavior of aluminum conductor, and frequent switching of DTs in the field may be responsible for excessive failures.

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Efficiency and Loss Evaluation of Large Power Transformers

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Bruno De Wachter

Mon, 05/20/2013 - 23:00

All power transformers have very high energy efficiency—the largest are probably the most efficient machines ever devised. However, there is still scope for improvement. Any improvement in the performance of large transformers offers the potential of genuine economic benefits because their throughput and their continuous duty mean that the energy they waste is likewise enormous.

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Incentives to improve energy efficiency in EU Grids

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Georgios Papaef...

Mon, 04/22/2013 - 14:55

This paper investigates the energy efficiency aspects in the network design and operation based on the Energy Efficiency Directive (2012/27/EU) and its provisions related to network tariffs and regulation.

The analysis on the possible technical efficiency measures to reduce losses (chapter 2), shows that a variety of both equipment replacement and operational improvements can lead to greater efficiency.

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Position paper regarding the proposed regulation in the EU w.r.t. ecodesign requirements for transformers

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Fri, 12/07/2012 - 18:06

Transmission losses in European networks vary between 1 and 2.6% of electricity generated. Distribution losses can be as high as 11.7%. On average, 7% of electricity is lost in T&D networks, making losses the single biggest electricity use in any member state.

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Canada increases efficiency standards

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Fri, 04/27/2012 - 17:39

The Canadian government has amended its Energy Efficiency Regulations. The amendments entered into effect this month.

Once implemented, several industrial products will be subjected to stricter energy efficiency performance standards. Many of these requirements are in concert with minimum standards established in the United States.

Of particular interest are electric motors and dry-type transformers that are imported or shipped across provincial lines for sale or lease within Canada.

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The Hexaformer is back!

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Stefan Fassbinder

Mon, 09/19/2011 - 14:50

Finally there is a symmetrically built distribution transformer available on the market again! It is now called TriDry and comes from ABB.

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A transformers toolkit dedicated to design engineers

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Isabelle Heriakian

Wed, 09/07/2011 - 00:00

We are pleased to announce the transformers toolkit is now available.

This toolkit bundle includes:

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Isolation Transformers

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Mon, 04/04/2011 - 14:47

Transformers can be more than just static devices that transfer electrical energy. Separation transformers, isolation and extra isolation transformer play a major role in the protection of people and equipment. They come in all ranges, from very small (a few VA) to quite large (a few MVA), and although more expensive than autotransformers or transformers with simple separate windings, they are an easy way to solve problems that could arise concerning:

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China leaps toward transformer efficiency

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Fri, 04/01/2011 - 00:00

China faces numerous challenges in providing power to its more than 1.3 billion people. Adding to that challenge is the amount of energy that is lost in China.

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The cost of losses for future network investment in the new networks regime

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Harry Colebourn

Mon, 02/14/2011 - 14:21

The supply industry is at a turning point, where the forecast costs of energy generation are expected to increase markedly beyond “traditional” levels and current market prices. The reasons for this are three-fold:

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LED lamps ... and their claims!

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Stefan Fassbinder

Fri, 09/03/2010 - 08:42

In a press release, the manufacturer claims that this LED lamp 'imitates the behaviour of an incandescent halogen lamp and hence will not cause any problems when replacing incandescent halogen lamps with it'.

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LED lamps, electronic converters and ...

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Stefan Fassbinder

Wed, 09/01/2010 - 15:11

Electronic transformers or converters for 12 V halogen lighting raise many a claim over conventional transformers made from lots of iron and copper. One is that the output voltage is regulated and hence offsets variances of the load. Variances of input voltage, they do not balance out, but this they do not claim. So much as an aside.

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Power Quality in a Customers Supplying Low-Voltage Line

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Tue, 03/09/2010 - 15:20

This case study is an assessment of electric power quality in a low voltage supply network in rural environment, based on measurements.

The subject of measurements was a low voltage line in which large disturbances occurred in the supply voltage, being the cause of customers' complaints. A modernisation of the installation was done; additional insulated cable was added and then the MV/LV transformer was replaced with a new one of larger rated power.

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Voltage fluctuations in a low voltage network

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Thu, 03/04/2010 - 16:44

This case study presents the control of quality parameters of electric power supplied from a low-voltage network to household consumers and public utility buildings.

The measures aimed at the power quality improvement, taken by the electric power supplier, are presented.

A comparison is done before and after replacement of a transformer to assess whether or not the choice was right.

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Distribution transformer replacement

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Bruno De Wachter

Sat, 11/07/2009 - 05:05

What are the decision factors in replacing an operating distribution transformer with a new one

Usually, distribution transformers are only replaced after failing.

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Chapter 7: overload capacity of power transformers

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Isabelle Heriakian

/ Published on:

Thu, 10/29/2009 - 15:09

This guide presents a methodology based on standard PN-IEC 60354 to check overloading capacity of transformers. Main changes versus standard PN-71/E-81000 are discussed and step by step examples are given. An essential advantage of the recommended methods of verification of overloading capacity of transformers is that the size and cooling modes of transformers are considered.

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Recycling transformers

By

Hans De Keulenaer

Wed, 10/21/2009 - 10:58

In my organisation (European Copper Institute), there is increasing attention to recycling. For power and distribution transformers (P&TD), recycling has limited impact on environmental performance since electricity losses over the lifetime of the transformer represent over 99% of impact. But recycling is important from an availability perspective of the material resources that the transformer uses.

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Transformers in power distribution networks

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Stefan Fassbinder

Mon, 08/31/2009 - 08:33

In electrical engineering terminology, transformers are regarded as electrical machines, although they only convert one form of electricity into another form of electricity. Due to this relatively simple function, among other reasons, their losses are lower than those of any equipment converting electricity into some other form of energy. They are probably the most efficient machines ever devised by man.

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What is the definition of a 'Smart Grid'?

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Bruno De Wachter

Tue, 08/18/2009 - 05:30

A concept often causing confusion

The 'smart grid' is commonly presented as an indispensable part of the future power system. It is claimed that a true liberalised electricity market with a high penetration of distributed generation will only be able to supply a high degree of power reliability if grids are made smart.

But what exactly is a 'smart grid'? Reading through some literature on the subject, one quickly discovers that it can mean many different things to many different people, often leading discussions to end in confusion.

A smart grid is neither a clearly defined single concept nor a single technology. Rather it is like a basket containing various combinations of balls. The context and the interpretation depend upon the user. Carnegie Mellon University recently published an article describing all of the various balls typically found in this metaphorical basket. Some of them represent innovations that are still in the development phase, while others stand for technologies which have already been applied for years.

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