High Voltage Pad-mount Transformer SEPTEMBER 5 - 7, 2018 What is - - PowerPoint PPT Presentation

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High Voltage Pad-mount Transformer SEPTEMBER 5 - 7, 2018 What is - - PowerPoint PPT Presentation

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High Voltage Pad-mount Transformer SEPTEMBER 5 - 7, 2018 What is the High Voltage Padmount Transformer(HVPT) Substation? Traditional substation vs. HVPT SEPTEMBER 5 - 7, 2018 HVPT History In order to reduce its outlay in distribution,

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High Voltage Pad-mount Transformer

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What is the High Voltage Padmount Transformer(HVPT) Substation?

Traditional substation vs. HVPT

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HVPT History

  • In order to reduce its outlay in distribution, Manitoba

Hydro investigated alternative solutions that would save in capital costs and land use while increasing reliability and safety.

  • Manitoba Hydro was also facing the need to

replace/refurbish many substations reaching their End of Life.

  • The idea to make a High Voltage “Distribution Style”

transformer was explored.

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HVPT History

  • Working with Partner Technologies Inc., Manitoba Hydro

researched and created the HVPT to realize their

  • bjectives.

Transformer Sizes Different Primary Voltages Different Secondary Voltage 1.5 MVA to 20 MVA Up to 138 kV 5 to 34.5 kV

  • Can be larger, however loses some of the benefits
  • In Research: 230 kV Primary Voltage. Can be done but

hasn’t been yet.

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HVPT Details

  • A HVPT has no energized external

parts.

  • No fencing required.
  • Suitable for any climate;

environmentally friendly.

  • Utility, residential, commercial and

industrial applications.

  • All station components separate – i.e.

regulators, switch gear, capacitors, and station service transformers.

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Benefits – Land Savings

  • Up to 75% in land savings. No need for a large station

structure, station yard and fencing.

  • In an industrial setting, the HVPT transformer can be

installed in spaces as small as 20 sq. meters.

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Benefits - Reliability

  • Smaller than your conventional substation, HVPT stations can

be installed closer to your site.

  • Shorter feeders, minimize voltage drops and losses and increase

reliability.

  • Lack of External Bushings and Parts reduces Wildlife Outages
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Benefits - Safety

  • The transformer comes with a tamper resistant enclosure

to ANSI C57.12.18 standards. This ensures the transformer is safe from damage from elements, humans, and wildlife.

  • The public is also protected without the need for fencing.
  • The grounding designs exceed

the requirements of IEEE 80 to ensure public safety.

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Benefits - Theft

Manitoba Hydro has seen a decrease in copper theft at HVPT Substations.

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Benefits – Weather

  • Storm resistant - covered in dry

nitrogen, no on-load tap changer, no conservator, sealed tank, no fans.

  • Operating Temperature Range

(for MH) is -40C to +40C(-40F to 104F)

  • Can be operated outside of this

range

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Benefits – Installation & Maintenance

  • The HVPT station fits onto a trailer and can be shipped

completely assembled to your site.

  • No on site ‘dressing’ of transformer required.
  • The transformer can then be

simply removed and transferred to different locations.

  • Only routine condition monitoring

is required.

  • Transformers can be “swapped out”

and in operation in 24 hours

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Benefits - Timeframe

  • An HVPT Substation’s Design is very simple (7 – 12

drawings vs 50)

  • Construction can take less than 2 weeks (including

verification testing

  • ~26 to 30 weeks from inception to

install

  • Long lead items
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Benefits - Cost

  • Installation costs up to 50% less than a conventional

substation while providing full functionality.

  • Cost savings include:
  • Less land procurement
  • Less additional materials

(no fencing, ancillary parts)

  • Quicker installation
  • Defer Capital costs
  • Avoid stranded assets
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Disadvantages

  • Data – Switchgears, ACRs, Regulators
  • Lack of Fans (ONAN/ONAF)
  • Onboard tap changer - Regulators
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Innovative Supply Options

  • Use of the HV Padmounts provides a cost effective

solution able to accommodate the quickly changing demands of the developer/customer

  • Flexibility and short lead times avoids stranded

assets

  • Incorporating automation eliminates concerns

regarding multiple smaller supply sites allowing for the distributed station concept to be viable

  • “Building Block Approach”
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Innovative Supply Options

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Innovative Supply Options

  • Waverley West subdivision is

approximately 2600 acres

  • Expected to accommodate

40,000 residents in 13,000 homes

  • Expected to be completely

developed in 10 to 30 years

  • Load estimates vary between

70 and 110 MVA

  • High level of uncertainty as to

load growth rate and horizon load

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Case Study – Modular Employment

  • Instead of two 60-MVA substations taking up 8 acres of

land, Manitoba Hydro installed ten 10-MVA HVPT stations surrounding the new 13,000 lot Waverley West development.

  • Drastically increased the utilization rate (N-1). (60% to

90%)

  • Initial savings per station amounted up to $1 million with

total net present value savings between $13 and $15 million.

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10 MVA Site

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2x 10 MVA Site

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Installation of an HVPT

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Dead-Front Terminations

Solid Dielectric Primary Connections

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Thank you! Q & A