high voltage pad-mount transformer - tsdos de monye... · 2018-09-20 · high voltage pad-mount...

SEPTEMBER 5 - 7, 2018

High Voltage Pad-mount Transformer


What is the High Voltage PadmountTransformer(HVPT) Substation?

Traditional substation vs. HVPT


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.


HVPT History• Working with Partner Technologies Inc., Manitoba Hydro

researched and created the HVPT to realize their objectives.

Transformer Sizes Different Primary Voltages

Different SecondaryVoltage

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.


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.


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.


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


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 toensure public safety.


Benefits - TheftManitoba Hydro has seen a decrease in

copper theft at HVPT Substations.


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


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 transferredto different locations.

• Only routine condition monitoringis required.

• Transformers can be “swapped out” and in operation in 24 hours


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


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


Disadvantages

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


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”


Innovative Supply Options


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


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.


10 MVA Site


2x 10 MVA Site


Installation of an HVPT


Dead-Front TerminationsSolid Dielectric Primary Connections


Thank you!

Q & A

high voltage pad-mount transformer - tsdos de monye... · 2018-09-20 · high voltage pad-mount...

Documents