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Pengumuman Penerimaan CPNS Bappenas TA 2007

Download Formulir Pendaftaran CPNS Bappenas 2007

Yang nglamar di Bappenas, tunggu di telpon aja…nih pengumumannya…: Pemberitahuan Jadwal Daftar Ulang Untuk Test TPA dan TPIU 

Abstract
The fact, that worldwide the percentage of power transformers with an age above the design life time is fairly above 50%, means, that nor the financial nor the production capacity will be sufficient in order to replace these transformers on a regular schedule. Further the increasing political pressure to maintain an uninterrupted reliable service requires well approved systems to keep even transformers with low remaining substance under acceptable controlled risk in service for a certain period. In order to take the technical and commercial optimized decisions the actual substance must be evaluated, the ageing behaviour taken in account and the necessary measures for conservation of a remaining useful substance applied.
The typical ageing behaviour due to the well-known ageing accelerators heat, water, acidity and oxygen of power transformers will be discussed. It will also commented, that the individual design of a transformer has a not neglectable influence also.
It will be discussed, how a acceptable substance evaluation is possible, using the complex information’s of the different ageing indicators. It is obvious, that only one indicator (i.e. Furan analysis) will often not give a sufficient detailed picture. At that time a rough scheme of 4 categories seems practicable: 1= full substance (new), 2= reduced, 3. conservable substance 4. No substance left.
The methods already on the market to conserve the substance under category 1-3 and the possibility to keep cat. 4 transformers for a certain time running observing the necessary responsibility will be critically discussed.
At hand of typical examples between a range of 20 to 600MVA transformers successful conservation schemes will be documented using classical DGA and sophisticated on line gas monitoring. At least, but not at last the positive technical and economical impact will be commented.

See detail in :  Ageing Behaviour, Substance Evaluation and Conservation of Power Transformers

POWER TRANSFORMER ASSET MANAGEMENT
by
Robert Houbaer1 and Ken Gray

Abstract
This paper discusses how Hydro Tasmania is implementing an advanced asset management program for its power scheme assets that focuses on plant reliability, managing risk and optimising life cycle costs. Hydro Tasmania is taking full advantage of the high initial investment in its passive civil assets by developing advanced asset management plans for its shorter life active electrical and mechanical assets. Most of the active assets are associated with energy conversion and delivery processes. Of these two processes the delivery process has been assessed as having the highest potential risk exposure to the business. A significant asset in the delivery process is the power transformer. A transformer asset management plan has been developed withthe business objective of providing a comprehensive assessment of condition, risk exposure to the business, and recommending future management strategies to minimise life cycle costs. Savings to be delivered over the next 10 years are expected to be in the order of A$3 million, a 30 per cent reduction of the original projected transformer expenditure. Following the success of the transformer study, a program of asset management plans is being introduced for other critical assets in the electrical energy delivery process. The outcomes of these plans are expected to produce similar benefits for the business with a subsequent flow on to further asset studies.
Keywords: asset management, service life, power management, transformers, energy delivery

See Detailin : Power Transformer Asset Management 

Transformer Asset Management - A New Paradigm

Bart Tichelman, President and CEO, SERVERON Corporation

There are 100,000 Power Transformers in America, and they are beginning to fail. The results can be catastrophic. What can we do about it?

See detail in :  Transformer Asset Management - A New Paradigm

Life Cycle Management of Utility Transformer Assets
by William H. Bartley P.E.
Hartford Steam Boiler Inspection & Insurance Co.
Hartford, CT
INTRODUCTION
The deregulation of wholesale electricity supply has led to a number of changes and new challenges for the electric utility industry and the market participants. A couple years ago, there were predictions that 750 Gigawatts of new generating capacity would be installed worldwide, between 2000 and 2010. But, the rush to build powerplants in the U.S. has subsided, somewhat; many of the energy companies are now drowning in debt. In 2001, projects worth 91 GW of generating capacity were cancelled (out of 500 GW). And in the first quarter of this year, orders for 57 GW of capacity were cancelled. But despite this downturn, the construction continues… in 2001, the US utility industry brought on-line 47 GW of new capacity.

See detail in : Life Cycle Management of Utility Transformer Assets

See detail in :  Condition Appraisal of Power Transformer

Very helpful…

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