High Voltage Pad-mount Transformer

Transcription

1 High Voltage Pad-mount Transformer

2 What is the High Voltage Padmount Transformer(HVPT) Substation? Traditional substation vs. HVPT

3 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.

4 HVPT History Working with Partner Technologies Inc., Manitoba Hydro researched and created the HVPT to realize their objectives. 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.

5

6 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.

7 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.

8 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

9 Benefits - Safety The transformer comes with a tamper resistant enclosure to ANSI C 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.

10 Benefits - Theft Manitoba Hydro has seen a decrease in copper theft at HVPT Substations.

11 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 Weather

12 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

13 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

14 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

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

16 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

17 Innovative Supply Options

18 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

19 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.

20

21

22 10 MVA Site

23 2x 10 MVA Site

24

25

26

27

28

29

30 Installation of an HVPT

31

32

33

34

35

36

37 Dead-Front Terminations Solid Dielectric Primary Connections

38

39

40 Thank you! Q & A