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ENERGY SAVINGS THROUGH
SUPPLY TRANSFORMERS
Erika Wilson, Manging Director
Agenda
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Meet Wilson Power Solutions
Why transformer losses matter: Energy savings outside the “box”
The Eco Design Directive for transformers
Super low loss amorphous transformers
Case studies & testimonials
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2
3
4
5
Your questions answered 6
Wilson Power Solutions
• 70yrs old family run SME in 3rd generation
• Transformer & switchgear suppliers to industry
• Pioneers of super low loss amorphous technology (Wilson e2)
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Energy Efficiency Savings – Only inside the building?
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2.9%
Energy generated wasted through transformer losses*
Transformers are silent energy guzzlers
5 *EU27 (2008) losses amounted to 93.4 TWh
Supply transformers – Time and again overlooked
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Transformer losses
No load losses (“core
losses”)
Permanent 24/7 from being
energised
Load losses (“winding losses”)
Product of load current
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EU Eco Design Directive Transformers
Tougher design specifications for transformer losses • Tier 1: Effective since 1st
July 2015
• Tier 2: Effective from 1st July 2021
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Applies to transformers “placed into the market or put into service” anywhere within the European Union.
EU Eco Design Directive Transformers
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“National Regulating Authorities are strongly advising…..” …to allow for the installation of more efficient transformers than the regulation requires whenever these are economically justified on a whole life cycle basis…”
Our solution since 2009 - The Wilson e2 UK’s first super low loss amorphous transformer
• Amorphous metal core
• Lowest combined transformer losses
• Meeting /exceeding Tier 2 (2021) Eco Design Specifications
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Eco Design Directive: Transformer loss comparison Size Standard loss (CRGO) pre 2015 Tier 1 – July 2015 Tier 2 – July 2021
Core
Losses [W]
Load
losses
[W]
Total
Watts
Core losses
[W]
Load losses
[W]
Total
Watts
Core
losses [W]
Load
losses [W]
Total
Watts
1000kVA 1,350 12,500 13,850 770 10,500 11,270 693 7600 8,293
%age
change -19% -26%
Products Standard Loss CRGO Txs Wilson e1 Wilson e2 amorphous
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Amorphous core technology
CRGO
Amorphous
ámorphos: origin Greek; shapeless
• Random atomic structure
• Lower hysteresis losses
• Lower eddy current losses
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Material comparison
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• 10 sheets of AMT to 1 sheet CRGO
Fancy adding £35,000 to your estates bottom line?
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1x infrastructure
decision
= 25 years of Energy Savings
Average age of a distribution transformer in UK?
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Ofgem: 62 years = born in 1954!
Savings through TX losses: OLD energy guzzling 1970’s unit hidden on site? 33400kWh = £3170/pa**
Mitigating ~ 18t CO2 /pa*
Could be significantly more if
older *Carbon factor: 1kWh = 0.537 kg/CO2
** Cost at terminals: 1kWh = £0.095
Based on 1000kVA liquid filled transformer with 70% load
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Guaranteed savings from reduced transformer losses
Two areas for energy savings
Potential savings through voltage management /VO
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1.
2.
Savings Overview
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• Constant output
voltage
• Buck & Boost
• 17 positions in 1%
steps
• Fully automatic AVR
relay
• Safety & Security of
supply
Wilson e2+with OLTC – On Load Tap Changer
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• 6.4% voltage reduction
• Reduced transformer losses
6% electricity reduction
“Install & forget solution”
Annual savings: £31k
Wilson e2 transformer replacement – UHSM
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For more details contact Mark Foden at UHSM
1x 2MVA transformer (Sub 1 T2)
• 7.5% voltage reduction
• Reduced transformer losses
2.6% electricity reduction
Savings: 272,949kWh
~£22,000 pa* *(0.08p /kWh)
Wilson e2 transformer replacement - McCain
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Wilson e2 transformer replacement – University of Warwick
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“It appealed to us to select the product with the best energy efficiency onto our estate, further given the availability of 2021 compliant transformers for what was in effect only a modest increase in capital cost over that of a 2015 compliant version, it was in reality a “no brainer” to select the e2 for two recently completed substation upgrade projects”
Electrical Design Engineer, The University of Warwick
THANK YOU.
ANY QUESTIONS?
