How to reduce distribution
transformer technical losses
In Africa, a persistent challenge is the high
rate of failure of distribution transformers,
which leads to the complete shut down in
distribution networks. The leading causes are
the improper quality of the materials used for
manufacturing of transformers, overloading at
sites, theft of oil and copper from
transformers, and inadequate grid protection
systems.
The focus should be on bringing in significant
improvement in the design, process, and quality
of the distribution transformers by selecting
reliable manufactures in addition to measures
taken to strengthen the distribution networks.
According to Toshiba, there are four significant challenges for African utilities
- Shortage of Power generation capacity,
- electrification for the rural area and
- shortage of necessary funding.
It is this underlying effort – always deliver a value chain for customers by providing energy-efficient products that result in savings – that is the driving force behind Toshiba’s success.
For utilities who continue to battle with technical losses, Toshiba proposes energy-efficient amorphous metal distribution transformers. Available from its state-of-the-art manufacturing facility based in India, these transformers are ideal for the reduction of technical losses.
Amorphous metal distribution transformers are highly reliable and competitive when evaluated on a life-cycle cost basis. Detailed in Figure 1 are the benefits of using amorphous transformers.
As an example, in a network installed with
10,000 units of amorphous transformers instead
of cold-rolled grain-oriented (CRGO), the
additional investment on AMDT will be 8%
(approx.) per transformer, when compared with
conventional CRGO transformer. The additional
investment percentage will vary depending on the
rating of the transformer.
The estimated savings obtained in using 10,000
AMDT units during the lifespan of the
transformer:
- Savings in electricity consumption cost of $1.2 million per year.
- Savings in the usage of power generation capacity of 2.41MW.
- Reduction in CO2 emissions of 5,926MT per year.
- The payback period using AMDT is three years.
Considering transformers have a typical lifespan
of 25 years, utilities and their customers will
benefit from the monetary savings in electricity
consumption, usage of power generation capacity,
and reduction in CO2 emissions. These benefits
gained by installing AMDTs in the network will
also boost the T&D sector in Africa.
The evidence is clear, AMDTs are
energy-efficient, and with aluminum winding have
numerous advantages in terms of reduction of
capital expenditure and overcoming vandalism, as
there is no copper inside.
TTDI is proud to have sophisticated ultra-modern manufacturing facilities, and state-of-the-art testing and manufacturing equipment for the fabrication, assembly and testing of amorphous metal core distribution transformers with total quality control process mechanisms meeting International Quality Standards.
Toshiba has always been at the forefront of promoting and delivering the best technologies and practices globally. We extend our support at every stage of asset management for distribution utilities, under our Total Asset Management Initiative. This support starts from the pre-tendering stage in incorporating the best technical specifications, manufacturing and testing practices. This initiative culminates in the post-landing control to ensure secure product delivery and support in training utilities’ workforce in the use and maintenance of products.
