SALS – Smart Adaptive Load Shedding · SALS – Smart Adaptive Load Shedding Bakhtyar Hoseinzadeh...

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SALS – Smart Adaptive Load Shedding

Bakhtyar Hoseinzadeh

27 February 2017

Renewable Energy  Sources                             Power System Stability                      Decentralized Protection                          Blackout

Presentation outline

SALS Introduction

Offline Simulation

Real Time Simulation 

Project Objectives & Deliveries

2

Field test

Conclusion

Project Partners

3[1] http://www.sals.et.aau.dk/

Project Team Members

4[1] http://www.sals.et.aau.dk/

Project Objectives

Enhancing the stability of power system

Ready for any scenarios (+ renewables -)

Minimizing costumer power interruption during emergency state

Decentralized & automatic self‐healing power system

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Project Deliveries

Adaptive Frequency Thresholds Using Voltage Drop Data

(1 )v

v

Distantmore voltage drop (no overlap) Close voltage drops (some overlap)

v ijf X                    R2 R1

X          R2 R1

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Project Deliveries (Cont’d)

Relay Comparison

ROCOF & inertia

Item UFLS AUFVLS

LS locations Predefined Event region

Relay setting Manual Adaptive

Over LS Sometimes Rarely

Dependent Independent

Voltage dynamic No Yes

Concurrent trigger Yes No

Over voltage Sometimes Rarely

Smooth frequency profile Not always Yes

Relay Advantages

Fault location oriented ↔ Adaptive to the event location

Network Topology

Communication

Plug & Play (PnP) installation ↔ Simple installation and maintenance

Detection of both Under Voltage (UV) & Under Frequency (UF) events

Robust against uncertainty in :

Network parameters→(Renewables)

Low cost ↔ Affordable hardware changes   + software upgrade8

Adaptive / automatic setting  Setting less ↔ No tuning and calibration

Decentralized:   No communication ↔ Cyber security Hierarchical:   Supervised by control center

Offline simulation

Test with distinct benchmark models

Sensitivity analysis and algorithm limitations

Reliability improvements

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Algorithm development

RMS simulation, frequency domain (Power Factory)

EMT simulation, time domain (PSCAD)

Different Simulator Softwares: 

Real time simulation, time domain (RSCAD)

Real Time Digital Simulation (RTDS)

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Online test (close loop): RTDS + HIL

Field test

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Online (open loop): Real system + HIL 

X

Thank you

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