Transformers and substations

Everything inside the substation; the link between the substation, its system and its maintenance.


 

Articles in this Section

Specific requirements for success of mobile substations

Engineering a mobile substation requires a clear understanding from the electrical perspective and from the road ordinance viewpoint of the country in which the solution will be deployed
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Saving Power Quality Rands

The transition from establishing PQ consequence and cost baselines into real financial value through PQ measurement and solutions technologies.
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Efficiency analysis of a three-phase power transformer

Industries are concerned about the cost of energy; and the lower efficiency of the transformer owing to energy that is lost in it.
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Natural esters: Redefining transformers

Natural ester dielectric fluids are increasingly being designed into transformers globally.
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Overhead line analysis and measurement with a smartphone or tablet

LineSmarts is an app for Android smartphones and tablets that enables remote field analysis and measurement of overhead power lines and structures.
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Transforming’ transformer monitoring technology

Effective early warning systems ensure that transformer outages, maintenance and replacements can be planned.
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Reduce South Africa’s electrical distribution transformer losses – revise SANS 780

South Africa’s dire electricity challenges give good reason to question transformer technology and efficiency standards – such as SANS 780.
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Bringing effective condition monitoring and data management to industry

Condition monitoring technologies and analysis strategies are becoming more sophisticated.
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Temporary traffic light solution

A cost-effective, portable, robust and speedily installed solution to the traffic light problem in Gauteng, South Africa, is proposed.
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Power Quality (PQ) Compression Algorithm - responsible electricity

In order to provide a high quality electric power service, it is essential to monitor the quality of the electric signals or Power Quality (PQ) at different locations along an electrical power network.
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Is Smart Metering smart enough for Africa?

It is important to understand the functionality of a smart metering system integrated with a meter data management system to ensure that it meets the specific requirements of Africa.
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The great debate: Copper versus aluminium

Should the variance in cost between equipment with copper versus aluminium conductors affect customers’ buying decisions?
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Proper transformer sizing and copper windings

The selection of the right transformer for economic performance involves examining the unit’s capacity (size) and efficiency
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Power to the MAX

Voltage optimisation provides a proven and reliable way to reduce energy consumption and curb carbon emissions.
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Gas optimisation systems - essential to stable electricity supply

The effects and benefits of conserving gas through optimisation on plants and through leak detection are significant.
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Transformer ratio measurements

Measuring transformer ratios from one external terminal to another can reveal a great deal of information about the transformer.
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Digital optics for control and protection systems

Current and voltage transducers are a critical component of Alstom Grid’s 800 kV HVDC project. Their open-ended optical technology has taken measurement to new levels of accuracy up to higher frequency ranges.
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Transformers at their practical best

The complexity of a transformer calls for precise design and manufacture.
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Investigation and efficiency analysis

This article presents an investigative case study and efficiency analysis of the 405 km, 420 kV transmission line between Insukamini substation in Zimbabwe and the Matimba thermal power station in SA.
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Load banks in utility commissioning

Rather than relying on grid availability utility companies can benefit from developments in medium voltage load banks to provide a sustained target load over an extended period of time to test transfomers and relays.
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DFR measurement for general insulation testing and diagnostics

With an ageing power component population, today’s electrical utility industry faces a tough challenge as failures and consequent repair and revenue loss may result in major costs.
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Online solutions to managing moisture levels in transformers

Excessive moisture is public enemy number one in power transformers utilising cellulose insulation with insulating oil for a long time.
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