Practical Application of Microgrids Interconnected to the Distribution System: A Case Study of a Real-life, Grid-interconnected Microgrid January 31, 2017

Who are we PowerStream: Provides service to more than 380,000 customers residing or owning a business in 15 communities around the Greater Toronto Area Employs over 500 employees. Currently undergoing a merger with three other utilities in the Greater Toronto Hamilton Area Korea Electric Power Corporation (KEPCO): Responsible for over 90% of South Korea's electricity generation Over 20,000 employees Over 65 GW of installed capacity *John—I don’t believe this number has ever been shared publicly and I actually don’t know it.  I believe the only reference made in the MAADs is that there would be a reduction of 280 employees, achieved through voluntary exits and retirements.  The current number of employees keeps dropping because people leave and they aren’t replaced, but we’re estimating we have about 1600 currently.  Minus the 280. 

Why

Project Goals Most outages at Penetanguishene are under 10 minutes; Eliminate these outages: Grid Resiliency & Outage Management (with greater visibility as a bonus) Assess the system as a asset deferral strategy Develop algorithms for the Microgrid Controller Enter the market as a microgrid solutions provider

What we did at Penetanguishene 750kVA/500kWh Li-Ion Battery System 5 circuit automatic switches to facilitate FDIR 1 Step Voltage Regulator to correct voltage issues Advanced Microgrid Controller (MiDAS) Autonomous function & SCADA integration

The Battery Samsung SDI Batteries (Li-Ion) Individual Cell Monitoring Automatic Voltage Equalization Rack Level & Master BMS Up to 2C discharge/charge Integral fire suppression and HVAC

The Power Conversion System (PCS) 750KVA, 4 Quadrant inverter IEEE 1547 Compliant Integrated Area Level Controller 600VDC nominal 350VAC nominal Integral fire suppression and HVAC

Switchgear, Transformer, Vacuum Circuit breakers, etc. Other technology Local Control/Server Room Switchgear, Transformer, Vacuum Circuit breakers, etc. 75kV SVR 5 Automatic Switches

Basic design

VCB, Transformers, Switchgear & Load Bank The Final Product Battery Container Show Room VCB, Transformers, Switchgear & Load Bank PCS Container

The MG Controller

Tests Black Start using 2 load banks (200kW and 1500kW as substitutes for the feeder Battery Dispatch by global demand (autonomous) Manual Control (P & Q setpoints) Simulated FDIR scenarios

FDIR

Islanding Omicron CMC 356 Triggering & recording was synchronized using GPS Monitoring from SEL487e

Islanding

Elapsed time: over 42 minutes Restoration Elapsed time: over 42 minutes

Learnings It works! Still early stages; need to pursue other value propositions Extensive EM&V scheduled & ongoing Demand data integration was easy; price, not so much Surprises: not enough outages

Thanks A special thanks to Omicron

Questions?