the university of seville smart grid lab: a multi-platform ...the university of seville smart grid...

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The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega, A. Gómez-Expósito, M. Barragán-Villarejo, F.P. García-López, J.I. Jiménez-Anguiano, J.M. Mauricio-Ferramola L. Alvarado-Barrios Power Engineering Group University of Sevilla 1

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Page 1: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach

Active Distribution Networks

José M. Maza-Ortega, A. Gómez-Expósito, M. Barragán-Villarejo, F.P. García-López,

J.I. Jiménez-Anguiano, J.M. Mauricio-FerramolaL. Alvarado-Barrios

Power Engineering GroupUniversity of Sevilla

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Page 2: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Contents

• Sevilla School of Engineering• CIGRE Task Force C06.04.02 Distribution Network• Scaled-down laboratory network• Omnimode Load Emulator (OLE) concept• Hardware implementation of the OLE• Control of the scaled-down distribution system• Test results• Including the scaled-down laboratory network in curricula• Conclusions and acknowledgements

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Page 3: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Sevilla School of Engineering

• University of Sevilla created in 1505 (Julio II Pope’s edict)• School of Engineering created in 1964• Currently all branches of engineering:

• Nearly 6000 students• Over 450 teaching staff

Aerospace Engineering

Civil Engineering

Chemistry Engineering

Business Engineering

Telecomunnication Engineering

Industrial Engineering

Energy Engineering

Electronics Engineering

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Page 4: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Sevilla School of Engineering

• Power Engineering courses in the graduate curricula:

• Why to teach active distribution networks?• Social demand• Industry demand

Electrical InstallationsElectrical Lines & CablesElectrical MachinesElectrical InstrumentationElectrical DrivesElectrical DistributionPower System Analysis

Power System SimulationPower QualityConventional Power PlantsIntegration of Renewable Power PlantsEnergy EfficiencyWind EnergyPhotovoltaic Power PlantsAircraft Power Systems

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Page 5: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

CIGRE Task Force C06.04.02 Distribution Network

• Distribution network description:• MV actual German network • Radial feeders with high R/X ratios• Objective: analysis of DG integration• Two feeders with 14 nodes• Loads:

• Residential, commercial & industrial• Generation:

• PV, wind energy & CHP• Energy storage• DC link between the feeders

K. Rudion, A. Orths, Z.A. Styczynski, K. Strunz, “Design of benchmark of medium voltage distribution network for investigation of DG integration“, IEEE PES General Meeting, 2006.

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Page 6: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

CIGRE Task Force C06.04.02 Distribution Network

• Load/generation daily profiles:

Residential

Industrial

Wind Power

PV Power

CHP

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Page 7: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Scaled-down laboratory network

• Objective:• Hardware test bed reproducing the behaviour of the MV network

• Scaled-down system:• Base magnitudes:

• Voltage: 20 kV → 400 V • Apparent Power: 20 MVA → 100 kVA

• Feeder branches: • Concentrated parameters (equivalent R,X)• Configurable R/X ratios & feeder lengths by series/paralell

association • Load/Generation: Omnimode Load Emulator (OLE)

• Voltage Source Converter: 20 kVA, 400 V, three-phase & three-wire• Centralized control of the system

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Page 8: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Scaled-down laboratory network

• Scaled-down system:Network branches Inductors

ResistorsOmnimode Load Emulators

Network nodes

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Page 9: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Omnimode Load Emulator (OLE) concept

• Voltage Source Converter (VSC) in each node:• Possibility of setting P & Q in each node• Common DC for all VSCs• Additional VSC for balancing the active power in the DC bus

Distributionnetwork

OLE1

OLE N

OLE j

BalanceVSC

LV Labnetwork

DC Bus+-

P1 Q1

Pj Qj

PN QN

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Page 10: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Hardware implementation of the OLE

• Electrical cabinet:

VSCs (20 kVA)

LCL coupling filter

Local controller

Measurement unit

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Page 11: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Control of the scaled-down distribution system

• Control scheme:• Centralized controller: Real Time Machine (SpeedGoat)• Local Controller: DSP (Texas Instrument Concerto)• Communications between centralized & local controllers: UDP

VSCDSP

PWM control(10 kHz)

PQ references(1 second)Control

Center

VSC Current & Voltage(50 microseconds)

VSC Current & Voltage(2 milliseconds)

UDP Communication Analog and Digital Signals

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Page 12: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Control of the scaled-down distribution system

• Task of the centralized controller:• Control of each individual OLE:

• Objective: set active and reactive power daily profiles• Tools:

• Load Profile Tool• Node Configuration Tool

Load Profile Tool Node Configuration Tool

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Page 13: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Control of the scaled-down distribution system

• Task of the centralized controller:• Supervision of the network state including OLE state machines

• Objectives:• Measure the actual active & reactive power of the OLEs• State of the OLEs (start/stop)• Fault condition

• Tool: SCADA system Monitoring tool

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Page 14: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Test results

• Waveform of the OLE current:Half load

Voltage: 400 V Current: 15 AVdc: 730 V THD= 2.2%

Full load

Voltage: 400 V Current: 30 AVdc: 730 V THD= 1.9 %

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Page 15: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Test results

• Active and reactive power tracking:

0 200 400 600 800-2000

0

2000

4000

6000

8000

10000VSC5

time (sec.)

PP*QQ*

Load daily profile PV + load daily profile

0 200 400 600 800-4000

-3000

-2000

-1000

0

1000VSC4

time (sec.)

PP*QQ*

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Page 16: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Test results

• Influence of the distributed generation:

0 100 200 300 400 500 600 700 800200

205

210

215

220

225

230

235

240

Time (sec.)

Volta

ge (V

)

Load+PV scenarioLoad scenario

0 200 400 600 800-2000

0

2000

4000

6000

8000

10000VSC5

time (sec.)

PP*QQ*

0 200 400 600 800-4000

-3000

-2000

-1000

0

1000VSC4

time (sec.)

PP*QQ*

OLE: 2, 3, 6 & 7 OLE: 1 & 5

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Page 17: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Scaled-down network in undergraduate curricula

• Laboratory practices:• Experimental validation of simulation results• Comparing passive vs. active distribution networks• Contribution of DG to the optimal operation of distribution networks• Real time application of algorithms:

• Control centers (DMS):• State estimation• Centralized voltage control• Network reconfiguration

• Power electronic-based devices:• DG units: PV, PMSM, DFIM• Voltage controllers: STATCOM, DVR• Flexible links: back-to-back, UPFC, SSSC

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Page 18: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Conclusions and acknowledgements

• Conclusions:• Scaled-down of an actual MV distribution system• Fully automated operation• Useful for Power Engineering Courses dealing with active distribution• Focus on the AC grid with several functionalities

• Acknowledgements:• Flexible operation of distribution power networks by using electronic

converters (FLEXILINK). Spanish Ministry of Science and Innovation (DGI). (ENE2011-24137)

• Joint Project of Intelligent Grids in the Henares Corridor: Renewable Energy Integration (PRICE-GDI). Ministry of Economy and Competitiveness. INNPACTO Program. (IPT-2011-1501-920000)

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Page 19: The University of Seville Smart Grid Lab: A Multi-Platform ...The University of Seville Smart Grid Lab: A Multi-Platform Test Bed to Teach Active Distribution Networks José M. Maza-Ortega,

Thanks for your attention!

Contact: [email protected]

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