gsu & transmission transformer resilience solutions

GSU & Transmission Transformer Resilience Solutions

www.siemens.com/pretactUnrestricted@ Siemens AG 2019

Unrestricted © Siemens AG 2019August 13, 2019 Siemens TP-TR

Any energy distribution network depends on substations along the entire energy value chain

Distribution and ConsumptionTransmissionTransmission Line with Substations

Energy Generation

Energy Consumption

Power transformers: the heart of any substation


Risk factors for a safe power supply

Operational issues Outages forced by others

Natural disasters

• Network failure• Incorrect operations• Aging fleet• Load balancing

• Vandalism• Cyber attacks

• Earthquakes• Hurricanes• Flooding• Fire• Geomagnetic storms


Grid at risk in the United States due to ageing assets


Increased Frequency of Power Outages in US


Blackouts – The impact on manufacturing industry

30 min without power costs a largeindustrial user

~$17,000

Example CanadaSource: trinitypower.com

~$21m. average loss in added value per hour in automobile and engine building industry

Example GermanySource: et-energie-online.de

>$150bn.damage for the economy annually

Example USA and EuropeSource: eforenergy.org/dieselserviceandsupply.com


Delivery time, dimensions and weight of Power Transformers can be a challenge for emergency or project time lines

Weight > 400t Delivery time: > 10 monthsTransport and installation time: > 2 monthsVoltage range: fixed e.g. 345/230kV


Mobile Rapid InstallationVersatile

First aid kit for grid operators: mobile transformers

230kV

138kV 115kV

345kV

Compact andlightweight design

Plug and Play connections and bushings

Covering different ratings


PREVENToperational risks

Resilience Concept

Common practice

PROTECTagainst vandalism and excessive heat

REACTto emergencies

Game changing concept

Mobile Versatile Rapid installation


Resilience Transformers for emergencies and scheduled maintenance

Flexible EPR cable connection

Plug In Bushings (HV & LV)

Alternative Insulation fluid (e.g. Ester)

Optimized for transportation

Multiple Rating units

Single phase units with optimized geometry

Cable Plug In connections

Neutral / LV

Communications Connectivity


• Installation time: Traditional 10 days or more

• Deployment time: Traditional up to 10-14 months

• Delivery: Special permits needed

• Replacement: 1:1 Spare approach

• Solution needed for emergencies and maintenance to by-pass

• Single-phase transformers to be used under different voltage ratings and in different configurations

• Fast replacement: easy to load and ship (Low transport weigh and small dimensions compared to traditional units)

• Plug & Play Bushings / cable and very short installation time• Use of environmental friendly Fluid (natural or synthetic ester)• Storage of accessories and cables in containers

The challenge The solution

Plug & Play Resilience TransformerREACT - Flexible, fast & easy for planned & unplanned outages

Flexible EPR cable connection

Plug In Bushings (HV & LV)

Alternative Insulation fluid (e.g. Ester)

Optimized for transportation

Multiple Rating units

Single phase units with optimized geometry

Cable Plug In connectionsNeutral / LV

Communications Connectivity


Plug & Play Transmission Resilience TransformerFlexible, fast & easy for planned & unplanned outages

Arrived in the US May 8, 2016

Technical dataWESTAR Energy

Three units 133MVA – single-phase – 60Hz

Possible operating voltages: 345/230kV or 345/138kV or 345/115kV or

230/138kV or 230/115kV Tertiary: 14.4kV 138/115kV alternative with cable terminations Switching links utilized to change between operating voltages Noise level 72.8dB(A) ODÀF – Mineral oil Plug In bushings and cable connections

Low transport weights: Unit without oil and components: 108,000lbs , 50t Unit without oil and with cooling unit: 124.000lbs , 56t Unit with oil: 148.000lbs , 67t Total weight (assembled) 167.000lbs , 75t

Installed in June 2017


WESTAR – Successful on site installation Energizing of the resilience transformer

NOT RELEASED FOR PUBLICATION


WESTARWarehouse

NOT RELEASED FOR PUBLICATION


Plug & Play Transmission Resilience TransformerFlexible, fast & easy for planned & unplanned outages

Technical dataConsolidated Edison of New York

Six units 100MVA – single-phase – 60Hz

Possible operating voltages (@ three phase rating): 335kV ±16x0.75% / 136kV/13.8kV @300MVA or

136kV ±5x1.84% / 68kV/13.8kV @150MVA LV with alternative plug in cable connections to grid OLTC and DETC for voltage regulation and switching

between operating voltages Noise level 75dB(A) KDAF – Ester Fluid – Synthetic Ester – MIDEL 7131 Plug In bushings and cable connections

Low transport weights: Fully assembled and oil filled: 216,000lbs , 98t Oil filled assembly without conservator : 194,000lbs , 88t Unit assembly without oil: 133,000lbs , 60t Oil: 10,080 gal, 81,570lbs , 37t

The solution and benefits Plug In bushings and cable connections Transport oil filled• Full overload conditions as per ConEd standard

e.g. 169%, 1 hour, @30°C ambient

Three units in the test lab2016

Installed in January 2017


ConEd – Successful on site installation Energizing of the resilience transformer


Plug & Play GSU Resilience TransformerFlexible, fast & easy for planned & unplanned outages

Example - Technical data345kV GSU solutionThree units 83.3MVA – single-phase – 60Hz (250MVA bank)Possible operating voltages (@ three phase rating):

LV with alternative plug in cable connections to grid Switching links utilized to change between operating voltages Noise level 75 dB(A) KDAF – Ester Fluid – Synthetic Ester – MIDEL 7131 Plug In bushings and cable connections (60m ~196ft)

Low transport weights:• Fully assembled and oil filled: ~214,000lbs, 97t• Transport weight (transformer) w/o oil: ~111,500lbs, 51t• Oil filled assembly without conservator: 208,000lbs, 94t• Unit assembly without oil: ~135,000lbs, 61t• Oil: 9,740 gal, 78,882lbs, 36t

Flexible Quick Deployment

Final testing end March 2018

Vector Group D D Y D Y D Y D Y D Y

LV Voltage [kV] 34.5 20 34.6 18 31.2 16 27.7 14 24.3 12 20.8

HV V

olta

ge [k

V] 400*) ● - - - - - - - - - -345 - ● ● ● ● ● ● ● ● ● ●230 - ● ● ● ● ● ● ● ● ● ●138 - ● ● ● ● ● ● ● ● ● ●115 - ● ● ● ● ● ● ● ● ● ●

Tertiary 13.6kV *)400kV via adapter and BIL 900kV


PROTECTagainst natural disasters and forced outages

REACTto emergencies and temporary outages

GENERAL

PREVENToperational issues

Increase Grid Resilience at any timeModular feature architecture to protect, prevent and react

Bullet resistance,composite insulators and bushings

DC compensation,GIC- and tank rapture safe transformers

Mobile Plug & Play concepts for transformers, reactors, RIS and RIP bushings

Reliable products,state of the art design tools

Monitoring,Life Time Management, Service concepts

Alternative Fluids,Blue products: vacuum switching and clean air technology

DCB, Hybrid insulated switchgear / Dead tank CB, Mobile GIS

Spare product concepts at customer sites for AIS, GIS equipment

Financing

Protection equipment like surge arresters and coils

Abbreviations: DC: Direct CurrentGIC: Geomagnetically Induced Currents

RIS: Resin Impregnated SyntheticRIP: Resin Impregnated Paper

DCB: Disconnecting Circuit BreakerGIS: Gas-insulated Switchgear

AIS: Air-insulated Switchgear


Grid resilience solutions –PROTECT – against vandalism and environment

The solution Versatile design to fit in different generating and transmission stations Protected against high-powered ballistics up to VPAM Class 9 Tank-mounted panels with no need for civil works protecting all critical

components against high-powered ballistics (tank, cooling equipment, conservator, turrets and the bottom of the bushings)

Shots in the dark Bullet resistant transformers


Grid resilience solutions –PREVENT – Operational risks

Tank rupture prevention GIC1 mitigation Condition monitoring

The challengeEnsuring the safest working conditions for substation personnel

The solutionFinite element analysis to identify and address specific weak-spots in the tank, enhancing safety of operation without increasing the footprint of the transformer

The challengeAvoid GIC-induced loss of performance and shortening of transformer lifetime

The solutionUnique know-how to predict and address hotspots and magnetization in critical components as well as DC compensation

The challengeMaintaining actual and complete information on the transformer fleet in a constrained budget

The solutionTailored service concepts to find the best fit between monitoring requirements and budget

1 Geomagnetic induced current


The design proposalThe technical data/specifics‒ 50MVA‒ 50 to 100MVAr in 31 steps‒ 345kV‒ 3 phase or single phase‒ 60Hz – ANSI

The solution and benefits‒ Cost reduction due to asset optimization (reduced space and less maintenance)‒ Reduced tied capital (VSR can reduce high variety of shunt reactor ratings)‒ Proven concept for fast installation‒ High reliability and grid efficiency‒ Flexibility on future network changes

‒ ONAN‒ Plug In bushings

Extension of plug & play concept to variable shunt reactors

The Variable Spare Reactor (VSR)


Beyond emergenciesTransformers as a flexible spare concept

345kV/115kV125MVA

230kV/115kV125MVA

115kV/34.5kV41MVA

345/230/115kV to 34.5kV 250MVA

Exemplary configuration and ratings

• Versatile• Voltage ratings• Different transformer types• Locations

• Mobile• Compact design (e.g. using NOMEX®)• Low transport weight

• Fast installation• Plug In bushings• Cable connections• Transport oil filled (e.g. MIDEL)


Thank you very much for your attention

David Calitz

Transformer Specialist EngineerTP TR

Email: [email protected]

siemens.com/pretact


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