Transmission SubstationsApplying lessons learnt from substation automation in high voltage transmission networks to medium-low voltage distribution networks

Peter VaessenIntelliSub Europe, Frankfurt, October 4th, 2012

Questions

What automation (functionalities) should be implemented to support the future smart grid ?

Which substations should be automated ?

How should be automated to support future requirements (e.g. IEC 61850) ?

What are the lessons learnt ?

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New functionalities for transmission substations

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430

320120.000

8.000.000100.000.000+

The pyramid challenge is real (example for The Netherlands)

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Choices have to be made; where and how to measure?

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Grid operating regimes change

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Dynamic rating needs reliable sensors and rules PT’s

CT’s

Meters

Indicators

Weather information

and …..

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Also acting on aging assets is required

Grey wave from the 1970-ties

Less money available

Different component life cycles

Maintenance / Replacement ?

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Transmission grid functionality transferred

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load

gene

ratio

n

time

overload

constraint

interruption

nominal capacity

allowable capacity

load/generation

Example: MV ring with overload situation

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load generation storage

Medium Voltage

Possible solutions

Upgrade / reinforce

Measure (and temporary allow)

Corrective measures

Preventive measures

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Move grid opening

Install storage system Active demand

Developments New components , e.g. smart transformers, electronic power flow and voltage

support, non conventional instrument transformers, grid connected storage systems

New functions, e.g. DG/RES facilitation, demand response, controlled islanding

Hardware (primary) and Software (secondary) integration

From component to System testing; using the grid as part of the test setup

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Flexible Power Grid Laboratory capabilities

1 MVA in 4 quadrant operation

3.3 kV 3 phases (up to 24kV)

Overload 1.25 p.u. 10 seconds,

3 p.u 1 second

Frequency from DC to 75 Hz

Harmonic distortion up to 2400 Hz

Available loads 500 kW, 1 MVAr

Stationary and dynamic voltage

1 MVA

2.4 kHz

24 kV

1 MVA

A free programmable “nightmare” grid

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Testing of intelligent components

Smart substation, now connected to Alliander’s grid

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PV inverter testing and model verification

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Lessons learned

Do not forget the hardware (limitations)

De-risk grid deployment (simulation & testing)

Copy existing High Voltage automation concepts

IT can solve it all

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www.dnvkema.com

www.dnv.com

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